FALSE00016532422022FYhttp://fasb.org/us-gaap/2022#AccountingStandardsUpdate201613Memberhttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponenthttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent http://www.butterfieldgroup.com/20221231#NoninterestIncomeOtherOperatingIncomeExpensehttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent http://www.butterfieldgroup.com/20221231#NoninterestIncomeOtherOperatingIncomeExpensehttp://fasb.org/us-gaap/2022#NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent http://www.butterfieldgroup.com/20221231#NoninterestIncomeOtherOperatingIncomeExpensehttp://fasb.org/us-gaap/2022#OtherAssetshttp://fasb.org/us-gaap/2022#OtherAssetshttp://fasb.org/us-gaap/2022#OtherLiabilitieshttp://fasb.org/us-gaap/2022#OtherLiabilitieshttp://fasb.org/us-gaap/2022#ForeignCurrencyTransactionGainLossBeforeTaxhttp://fasb.org/us-gaap/2022#ForeignCurrencyTransactionGainLossBeforeTaxhttp://fasb.org/us-gaap/2022#ForeignCurrencyTransactionGainLossBeforeTaxhttp://fasb.org/us-gaap/2022#OtherAssetshttp://fasb.org/us-gaap/2022#OtherAssets00016532422022-01-012022-12-310001653242dei:BusinessContactMember2022-01-012022-12-310001653242ntb:NewYorkStockExchangeMember2022-01-012022-12-310001653242ntb:BermudaStockExchangeMember2022-01-012022-12-3100016532422022-12-31xbrli:sharesiso4217:USD00016532422021-12-31iso4217:USDxbrli:shares0001653242us-gaap:CommonClassAMember2021-12-310001653242us-gaap:CommonClassAMember2022-12-310001653242us-gaap:NonvotingCommonStockMember2022-12-310001653242us-gaap:NonvotingCommonStockMember2021-12-3100016532422021-01-012021-12-3100016532422020-01-012020-12-310001653242us-gaap:CommonStockMember2021-12-310001653242us-gaap:CommonStockMember2020-12-310001653242us-gaap:CommonStockMember2019-12-310001653242us-gaap:CommonStockMember2022-01-012022-12-310001653242us-gaap:CommonStockMember2021-01-012021-12-310001653242us-gaap:CommonStockMember2020-01-012020-12-310001653242us-gaap:CommonStockMember2022-12-310001653242us-gaap:AdditionalPaidInCapitalMember2021-12-310001653242us-gaap:AdditionalPaidInCapitalMember2020-12-310001653242us-gaap:AdditionalPaidInCapitalMember2019-12-310001653242us-gaap:AdditionalPaidInCapitalMember2022-01-012022-12-310001653242us-gaap:AdditionalPaidInCapitalMember2021-01-012021-12-310001653242us-gaap:AdditionalPaidInCapitalMember2020-01-012020-12-310001653242us-gaap:AdditionalPaidInCapitalMember2022-12-310001653242us-gaap:RetainedEarningsMember2021-12-310001653242us-gaap:RetainedEarningsMember2020-12-310001653242us-gaap:RetainedEarningsMember2019-12-3100016532422019-01-012019-12-310001653242srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RetainedEarningsMember2019-12-310001653242us-gaap:RetainedEarningsMember2022-01-012022-12-310001653242us-gaap:RetainedEarningsMember2021-01-012021-12-310001653242us-gaap:RetainedEarningsMember2020-01-012020-12-310001653242us-gaap:RetainedEarningsMember2022-12-310001653242us-gaap:TreasuryStockCommonMember2021-12-310001653242us-gaap:TreasuryStockCommonMember2020-12-310001653242us-gaap:TreasuryStockCommonMember2019-12-310001653242us-gaap:TreasuryStockCommonMember2022-01-012022-12-310001653242us-gaap:TreasuryStockCommonMember2021-01-012021-12-310001653242us-gaap:TreasuryStockCommonMember2020-01-012020-12-310001653242us-gaap:TreasuryStockCommonMember2022-12-310001653242us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-12-310001653242us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-12-310001653242us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-12-310001653242us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-01-012022-12-310001653242us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-01-012021-12-310001653242us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-01-012020-12-310001653242us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-12-3100016532422020-12-3100016532422019-12-31ntb:segment0001653242srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RetainedEarningsMember2020-12-310001653242srt:MaximumMemberus-gaap:OtherIntangibleAssetsMember2022-01-012022-12-310001653242us-gaap:BuildingMember2022-01-012022-12-310001653242us-gaap:EquipmentMembersrt:MinimumMember2022-01-012022-12-310001653242srt:MaximumMemberus-gaap:EquipmentMember2022-01-012022-12-310001653242srt:MinimumMemberus-gaap:SoftwareAndSoftwareDevelopmentCostsMember2022-01-012022-12-310001653242srt:MaximumMemberus-gaap:SoftwareAndSoftwareDevelopmentCostsMember2022-01-012022-12-310001653242ntb:UnrestrictedInvestmentsMemberntb:MaturingWithinThreeMonthsMember2022-12-310001653242ntb:UnrestrictedInvestmentsMemberntb:MaturingWithinThreeMonthsMember2021-12-310001653242ntb:UnrestrictedInvestmentsMemberntb:MaturingBetweenThreeToSixMonthsMember2022-12-310001653242ntb:UnrestrictedInvestmentsMemberntb:MaturingBetweenThreeToSixMonthsMember2021-12-310001653242ntb:UnrestrictedInvestmentsMemberntb:MaturingBetweenSixToTwelveMonthsMember2022-12-310001653242ntb:UnrestrictedInvestmentsMemberntb:MaturingBetweenSixToTwelveMonthsMember2021-12-310001653242ntb:UnrestrictedInvestmentsMember2022-12-310001653242ntb:UnrestrictedInvestmentsMember2021-12-310001653242ntb:RestrictedInvestmentsMemberus-gaap:InterestBearingDepositsMember2022-12-310001653242ntb:RestrictedInvestmentsMemberus-gaap:InterestBearingDepositsMember2021-12-310001653242ntb:RestrictedInvestmentsMember2022-12-310001653242ntb:RestrictedInvestmentsMember2021-12-310001653242us-gaap:EquitySecuritiesMember2022-12-310001653242us-gaap:EquitySecuritiesMember2021-12-310001653242us-gaap:USTreasuryAndGovernmentMember2022-12-310001653242us-gaap:USTreasuryAndGovernmentMember2021-12-310001653242us-gaap:ForeignGovernmentDebtSecuritiesMember2022-12-310001653242us-gaap:ForeignGovernmentDebtSecuritiesMember2021-12-310001653242ntb:AssetbackedSecuritiesStudentLoansMember2022-12-310001653242ntb:AssetbackedSecuritiesStudentLoansMember2021-12-310001653242us-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001653242us-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-31ntb:securityxbrli:pure0001653242us-gaap:ResidentialMortgageBackedSecuritiesMembersrt:MinimumMember2022-01-012022-12-310001653242srt:MaximumMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-01-012022-12-310001653242us-gaap:AssetPledgedAsCollateralWithRightMember2022-12-310001653242us-gaap:AssetPledgedAsCollateralWithRightMember2021-12-310001653242us-gaap:USTreasuryAndGovernmentMember2022-01-012022-12-310001653242us-gaap:USTreasuryAndGovernmentMember2021-01-012021-12-310001653242us-gaap:USTreasuryAndGovernmentMember2020-01-012020-12-310001653242us-gaap:ForeignGovernmentDebtSecuritiesMember2022-01-012022-12-310001653242us-gaap:ForeignGovernmentDebtSecuritiesMember2021-01-012021-12-310001653242us-gaap:ForeignGovernmentDebtSecuritiesMember2020-01-012020-12-310001653242us-gaap:AssetBackedSecuritiesMember2022-01-012022-12-310001653242us-gaap:AssetBackedSecuritiesMember2021-01-012021-12-310001653242us-gaap:AssetBackedSecuritiesMember2020-01-012020-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:PassMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:SubstandardMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:CommercialAndIndustrialSectorMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:CommercialAndIndustrialSectorMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:PassMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:SubstandardMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:PassMemberus-gaap:RealEstateLoanMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:RealEstateLoanMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:PassMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:SubstandardMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:PassMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:SubstandardMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMemberus-gaap:AutomobileLoanMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:AutomobileLoanMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:PassMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:SubstandardMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:PassMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:SubstandardMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:PassMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:SubstandardMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:SubstandardMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMember2022-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:PassMember2022-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:SpecialMentionMember2022-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:SubstandardMember2022-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:DoubtfulMember2022-12-310001653242us-gaap:ResidentialPortfolioSegmentMember2022-12-310001653242us-gaap:PassMember2022-12-310001653242us-gaap:SpecialMentionMember2022-12-310001653242us-gaap:SubstandardMember2022-12-310001653242us-gaap:DoubtfulMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberntb:CashAndPortfolioSecuredLendingCollateralMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberntb:BuildingsInConstructionOrOtherCollateralMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:PassMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:SubstandardMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMemberus-gaap:CommercialAndIndustrialSectorMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:CommercialAndIndustrialSectorMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:PassMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:SubstandardMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:SubstandardMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:PassMemberus-gaap:RealEstateLoanMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:RealEstateLoanMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:PassMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:SubstandardMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:PassMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:SubstandardMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMemberus-gaap:AutomobileLoanMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:SubstandardMemberus-gaap:AutomobileLoanMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:PassMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:SubstandardMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:PassMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:SubstandardMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:PassMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:SubstandardMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:PassMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:SubstandardMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMember2021-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:PassMember2021-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:SpecialMentionMember2021-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:SubstandardMember2021-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:DoubtfulMember2021-12-310001653242us-gaap:ResidentialPortfolioSegmentMember2021-12-310001653242us-gaap:PassMember2021-12-310001653242us-gaap:SpecialMentionMember2021-12-310001653242us-gaap:SubstandardMember2021-12-310001653242us-gaap:DoubtfulMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberntb:CashAndPortfolioSecuredLendingCollateralMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberntb:BuildingsInConstructionOrOtherCollateralMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:ResidentialPortfolioSegmentMember2022-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:FinancingReceivables30To59DaysPastDueMember2022-12-310001653242us-gaap:FinancingReceivables60To89DaysPastDueMember2022-12-310001653242us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-12-310001653242us-gaap:FinancialAssetPastDueMember2022-12-310001653242us-gaap:FinancialAssetNotPastDueMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:GovernmentSectorMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:CommercialAndIndustrialSectorMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:RealEstateLoanMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:ConstructionLoansMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:AutomobileLoanMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OverdraftLoanMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetPastDueMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:FinancialAssetPastDueMemberus-gaap:ResidentialPortfolioSegmentMember2021-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001653242us-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001653242us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001653242us-gaap:FinancialAssetPastDueMember2021-12-310001653242us-gaap:FinancialAssetNotPastDueMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMember2022-01-012022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMember2022-01-012022-12-310001653242us-gaap:ConsumerPortfolioSegmentMember2022-01-012022-12-310001653242us-gaap:ResidentialPortfolioSegmentMember2022-01-012022-12-310001653242us-gaap:CommercialPortfolioSegmentMember2020-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMember2020-12-310001653242us-gaap:ConsumerPortfolioSegmentMember2020-12-310001653242us-gaap:ResidentialPortfolioSegmentMember2020-12-310001653242us-gaap:CommercialPortfolioSegmentMember2021-01-012021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMember2021-01-012021-12-310001653242us-gaap:ConsumerPortfolioSegmentMember2021-01-012021-12-310001653242us-gaap:ResidentialPortfolioSegmentMember2021-01-012021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:CommercialAndIndustrialSectorMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:CommercialAndIndustrialSectorMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberntb:OverdraftLoanMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberntb:OverdraftLoanMember2021-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2022-12-310001653242us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:RealEstateLoanMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:RealEstateLoanMember2021-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2022-12-310001653242us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:AutomobileLoanMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberus-gaap:AutomobileLoanMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonperformingFinancingReceivableMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonperformingFinancingReceivableMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberntb:OverdraftLoanMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMemberntb:OverdraftLoanMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:NonperformingFinancingReceivableMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberntb:OtherLoansMemberus-gaap:NonperformingFinancingReceivableMember2021-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2022-12-310001653242us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2021-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2022-12-310001653242us-gaap:ResidentialPortfolioSegmentMemberus-gaap:NonperformingFinancingReceivableMember2021-12-310001653242us-gaap:NonperformingFinancingReceivableMember2022-12-310001653242us-gaap:NonperformingFinancingReceivableMember2021-12-31ntb:contract0001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:BE2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:BE2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:BE2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:BEntb:TotalCreditExposureMember2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:BE2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:BE2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:BE2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:BEntb:TotalCreditExposureMember2021-01-012021-12-310001653242country:BMus-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMember2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMembercountry:BMus-gaap:CreditAvailabilityConcentrationRiskMember2022-01-012022-12-310001653242country:BMntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMember2022-01-012022-12-310001653242country:BMus-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMember2022-01-012022-12-310001653242country:BMus-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMember2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMembercountry:BMus-gaap:CreditAvailabilityConcentrationRiskMember2021-01-012021-12-310001653242country:BMntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMember2021-01-012021-12-310001653242country:BMus-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMember2021-01-012021-12-310001653242country:CAus-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMember2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMembercountry:CAus-gaap:CreditAvailabilityConcentrationRiskMember2022-01-012022-12-310001653242country:CAntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMember2022-01-012022-12-310001653242country:CAus-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMember2022-01-012022-12-310001653242country:CAus-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMember2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMembercountry:CAus-gaap:CreditAvailabilityConcentrationRiskMember2021-01-012021-12-310001653242country:CAntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMember2021-01-012021-12-310001653242country:CAus-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMember2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:KY2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:KY2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:KY2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:KYntb:TotalCreditExposureMember2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:KY2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:KY2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:KY2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:KYntb:TotalCreditExposureMember2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:DE2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:DE2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:DE2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:DEntb:TotalCreditExposureMember2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:DE2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:DE2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:DE2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:DEntb:TotalCreditExposureMember2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:GG2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:GG2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:GG2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMembercountry:GG2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:GG2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:GG2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:GG2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMembercountry:GG2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:IE2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:IE2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:IE2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMembercountry:IE2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:IE2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:IE2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:IE2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMembercountry:IE2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:JP2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:JP2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:JP2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:JPntb:TotalCreditExposureMember2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:JP2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:JP2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:JP2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:JPntb:TotalCreditExposureMember2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:JE2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:JE2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:JE2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:JEntb:TotalCreditExposureMember2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:JE2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:JE2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:JE2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:JEntb:TotalCreditExposureMember2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:NO2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:NO2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:NO2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:NOntb:TotalCreditExposureMember2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:NO2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:NO2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:NO2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:NOntb:TotalCreditExposureMember2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:CH2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:CH2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:CH2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:CHntb:TotalCreditExposureMember2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:CH2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:CH2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:CH2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:CHntb:TotalCreditExposureMember2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:BS2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:BS2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:BS2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMembercountry:BS2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:BS2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:BS2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:BS2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMembercountry:BS2021-01-012021-12-310001653242country:GBus-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMember2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMembercountry:GBus-gaap:CreditAvailabilityConcentrationRiskMember2022-01-012022-12-310001653242country:GBntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMember2022-01-012022-12-310001653242country:GBus-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMember2022-01-012022-12-310001653242country:GBus-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMember2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMembercountry:GBus-gaap:CreditAvailabilityConcentrationRiskMember2021-01-012021-12-310001653242country:GBntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMember2021-01-012021-12-310001653242country:GBus-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMember2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:US2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:US2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:US2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:USntb:TotalCreditExposureMember2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMembercountry:US2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:US2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMembercountry:US2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMembercountry:USntb:TotalCreditExposureMember2021-01-012021-12-310001653242ntb:OtherGeographicRegionsMemberus-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMember2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberntb:OtherGeographicRegionsMemberus-gaap:CreditAvailabilityConcentrationRiskMember2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberntb:OtherGeographicRegionsMemberus-gaap:CreditAvailabilityConcentrationRiskMember2022-01-012022-12-310001653242ntb:OtherGeographicRegionsMemberus-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMember2022-01-012022-12-310001653242ntb:OtherGeographicRegionsMemberus-gaap:CreditAvailabilityConcentrationRiskMemberntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMember2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberntb:OtherGeographicRegionsMemberus-gaap:CreditAvailabilityConcentrationRiskMember2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberntb:OtherGeographicRegionsMemberus-gaap:CreditAvailabilityConcentrationRiskMember2021-01-012021-12-310001653242ntb:OtherGeographicRegionsMemberus-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMember2021-01-012021-12-310001653242ntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMemberus-gaap:CreditAvailabilityConcentrationRiskMember2022-01-012022-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMember2022-01-012022-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMember2022-01-012022-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMember2022-01-012022-12-310001653242ntb:CashDueFromBanksAgreementstoResellandShorttermInvestmentsMemberus-gaap:CreditAvailabilityConcentrationRiskMember2021-01-012021-12-310001653242ntb:FinancingReceivableAfterAllowanceForCreditLossMemberus-gaap:CreditAvailabilityConcentrationRiskMember2021-01-012021-12-310001653242ntb:OffbalanceSheetMemberus-gaap:CreditAvailabilityConcentrationRiskMember2021-01-012021-12-310001653242us-gaap:CreditAvailabilityConcentrationRiskMemberntb:TotalCreditExposureMember2021-01-012021-12-310001653242us-gaap:LandMember2022-12-310001653242us-gaap:LandMember2021-12-310001653242us-gaap:BuildingMember2022-12-310001653242us-gaap:BuildingMember2021-12-310001653242us-gaap:EquipmentMember2022-12-310001653242us-gaap:EquipmentMember2021-12-310001653242ntb:ComputerHardwareandSoftwareMember2022-12-310001653242ntb:ComputerHardwareandSoftwareMember2021-12-310001653242us-gaap:SoftwareDevelopmentMember2022-12-310001653242us-gaap:SoftwareDevelopmentMember2021-12-310001653242us-gaap:BuildingMember2021-01-012021-12-310001653242us-gaap:BuildingMember2020-01-012020-12-310001653242us-gaap:EquipmentMember2022-01-012022-12-310001653242us-gaap:EquipmentMember2021-01-012021-12-310001653242us-gaap:EquipmentMember2020-01-012020-12-310001653242ntb:ComputerHardwareandSoftwareMember2022-01-012022-12-310001653242ntb:ComputerHardwareandSoftwareMember2021-01-012021-12-310001653242ntb:ComputerHardwareandSoftwareMember2020-01-012020-12-310001653242ntb:CaymanSegmentMember2019-12-310001653242ntb:ChannelIslandsAndUnitedKingdomSegmentMember2019-12-310001653242us-gaap:AllOtherSegmentsMember2019-12-310001653242ntb:CaymanSegmentMember2020-01-012020-12-310001653242ntb:ChannelIslandsAndUnitedKingdomSegmentMember2020-01-012020-12-310001653242us-gaap:AllOtherSegmentsMember2020-01-012020-12-310001653242ntb:CaymanSegmentMember2020-12-310001653242ntb:ChannelIslandsAndUnitedKingdomSegmentMember2020-12-310001653242us-gaap:AllOtherSegmentsMember2020-12-310001653242ntb:CaymanSegmentMember2021-01-012021-12-310001653242ntb:ChannelIslandsAndUnitedKingdomSegmentMember2021-01-012021-12-310001653242us-gaap:AllOtherSegmentsMember2021-01-012021-12-310001653242ntb:CaymanSegmentMember2021-12-310001653242ntb:ChannelIslandsAndUnitedKingdomSegmentMember2021-12-310001653242us-gaap:AllOtherSegmentsMember2021-12-310001653242ntb:CaymanSegmentMember2022-01-012022-12-310001653242ntb:ChannelIslandsAndUnitedKingdomSegmentMember2022-01-012022-12-310001653242us-gaap:AllOtherSegmentsMember2022-01-012022-12-310001653242ntb:CaymanSegmentMember2022-12-310001653242ntb:ChannelIslandsAndUnitedKingdomSegmentMember2022-12-310001653242us-gaap:AllOtherSegmentsMember2022-12-310001653242us-gaap:CustomerRelationshipsMemberntb:BermudaSegmentMember2022-12-310001653242us-gaap:CustomerRelationshipsMemberntb:BermudaSegmentMember2021-12-310001653242us-gaap:CustomerRelationshipsMemberntb:CaymanSegmentMember2022-12-310001653242us-gaap:CustomerRelationshipsMemberntb:CaymanSegmentMember2021-12-310001653242us-gaap:CustomerRelationshipsMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2022-12-310001653242us-gaap:CustomerRelationshipsMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2021-12-310001653242us-gaap:CustomerRelationshipsMemberus-gaap:AllOtherSegmentsMember2022-12-310001653242us-gaap:CustomerRelationshipsMemberus-gaap:AllOtherSegmentsMember2021-12-310001653242us-gaap:CustomerRelationshipsMember2022-12-310001653242us-gaap:CustomerRelationshipsMember2021-12-310001653242us-gaap:CustomerRelationshipsMember2022-01-012022-12-310001653242us-gaap:CustomerRelationshipsMember2021-01-012021-12-310001653242us-gaap:CustomerRelationshipsMember2020-01-012020-12-310001653242ntb:BermudaSegmentMember2022-12-310001653242ntb:BermudaSegmentMember2021-12-310001653242ntb:PostretirementHealthCoverage2010AmendmentMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMemberntb:BermudaSegmentMember2022-01-012022-12-310001653242us-gaap:DefinedBenefitPostretirementHealthCoverageMemberntb:BermudaSegmentMemberntb:PostretirementHealthCoverage2011AmendmentMember2022-01-012022-12-310001653242ntb:PostretirementHealthCoverage2014AmendmentMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMemberntb:BermudaSegmentMember2014-01-012014-12-310001653242ntb:PostretirementHealthCoverage2014AmendmentMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMemberntb:BermudaSegmentMember2019-01-012019-12-310001653242ntb:GuernseySegmentMemberus-gaap:PensionPlansDefinedBenefitMember2022-01-012022-12-310001653242us-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:DefinedBenefitPostretirementHealthCoverageMember2022-12-310001653242us-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-12-310001653242us-gaap:PensionPlansDefinedBenefitMember2020-12-310001653242us-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-12-310001653242us-gaap:PensionPlansDefinedBenefitMember2019-12-310001653242us-gaap:DefinedBenefitPostretirementHealthCoverageMember2019-12-310001653242us-gaap:PensionPlansDefinedBenefitMember2022-01-012022-12-310001653242us-gaap:DefinedBenefitPostretirementHealthCoverageMember2022-01-012022-12-310001653242us-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310001653242us-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-01-012021-12-310001653242us-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310001653242us-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-01-012020-12-310001653242srt:MaximumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2022-01-012022-12-310001653242srt:MinimumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2022-01-012022-12-310001653242srt:MaximumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-01-012021-12-310001653242srt:MinimumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-01-012021-12-310001653242srt:MaximumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-01-012020-12-310001653242srt:MinimumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-01-012020-12-310001653242srt:MaximumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2022-12-310001653242srt:MinimumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2022-12-310001653242srt:MaximumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-12-310001653242srt:MinimumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-12-310001653242srt:MaximumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-12-310001653242srt:MinimumMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-12-310001653242us-gaap:DefinedBenefitPlanDebtSecurityMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:DefinedBenefitPlanDebtSecurityMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:DefinedBenefitPlanEquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:DefinedBenefitPlanEquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel3Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:USTreasuryAndGovernmentMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel3Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:USTreasuryAndGovernmentMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel3Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel3Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:CorporateDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:CorporateDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel3Memberus-gaap:CorporateDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:CorporateDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:CorporateDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:CorporateDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel3Memberus-gaap:CorporateDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:CorporateDebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:DefinedBenefitPlanEquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:DefinedBenefitPlanEquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:DefinedBenefitPlanEquitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:DefinedBenefitPlanEquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:DefinedBenefitPlanEquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:DefinedBenefitPlanEquitySecuritiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel3Memberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel3Memberus-gaap:DefinedBenefitPlanCashAndCashEquivalentsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel3Memberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:FairValueInputsLevel3Memberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242ntb:MutualFundsAndEquitySecuritiesManagedOrAdministeredByWhollyOwnedSubsidiariesMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242ntb:MutualFundsAndEquitySecuritiesManagedOrAdministeredByWhollyOwnedSubsidiariesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:CommonClassAMemberntb:ParentCompanyCommonStockMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:CommonClassAMemberntb:ParentCompanyCommonStockMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-31ntb:custodian0001653242ntb:CustodianMember2022-12-310001653242us-gaap:StandbyLettersOfCreditMemberntb:CustodianMember2022-12-310001653242us-gaap:StandbyLettersOfCreditMemberntb:CustodianMember2021-12-310001653242us-gaap:StandbyLettersOfCreditMember2022-01-012022-12-310001653242us-gaap:GuaranteeOfIndebtednessOfOthersMember2022-01-012022-12-310001653242us-gaap:FinancialStandbyLetterOfCreditMember2022-12-310001653242us-gaap:FinancialStandbyLetterOfCreditMember2021-12-310001653242us-gaap:FinancialGuaranteeMember2022-12-310001653242us-gaap:FinancialGuaranteeMember2021-12-310001653242us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2022-12-31ntb:position0001653242us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2021-12-310001653242us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2022-01-012022-12-310001653242us-gaap:PendingLitigationMemberntb:JohnDoeSummonsesMember2013-11-012013-11-30ntb:institution0001653242us-gaap:SettledLitigationMember2021-08-032021-12-310001653242us-gaap:SettledLitigationMemberntb:JohnDoeSummonsesMember2021-08-032021-12-310001653242us-gaap:OperatingSegmentsMemberntb:BermudaSegmentMember2022-01-012022-12-31ntb:branch0001653242us-gaap:OperatingSegmentsMemberntb:CaymanSegmentMember2022-01-012022-12-310001653242us-gaap:OperatingSegmentsMemberntb:BermudaSegmentMember2022-12-310001653242us-gaap:OperatingSegmentsMemberntb:BermudaSegmentMember2021-12-310001653242us-gaap:OperatingSegmentsMemberntb:CaymanSegmentMember2022-12-310001653242us-gaap:OperatingSegmentsMemberntb:CaymanSegmentMember2021-12-310001653242us-gaap:OperatingSegmentsMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2022-12-310001653242us-gaap:OperatingSegmentsMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2021-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:AllOtherSegmentsMember2022-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:AllOtherSegmentsMember2021-12-310001653242us-gaap:OperatingSegmentsMember2022-12-310001653242us-gaap:OperatingSegmentsMember2021-12-310001653242us-gaap:IntersegmentEliminationMember2022-12-310001653242us-gaap:IntersegmentEliminationMember2021-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberntb:BermudaSegmentMember2022-01-012022-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberntb:BermudaSegmentMember2022-01-012022-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberntb:CaymanSegmentMember2022-01-012022-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberntb:CaymanSegmentMember2022-01-012022-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2022-01-012022-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2022-01-012022-12-310001653242us-gaap:OperatingSegmentsMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2022-01-012022-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberus-gaap:AllOtherSegmentsMember2022-01-012022-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberus-gaap:AllOtherSegmentsMember2022-01-012022-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:AllOtherSegmentsMember2022-01-012022-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMember2022-01-012022-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMember2022-01-012022-12-310001653242us-gaap:OperatingSegmentsMember2022-01-012022-12-310001653242ntb:CustomerSubsegmentMemberus-gaap:IntersegmentEliminationMember2022-01-012022-12-310001653242us-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberus-gaap:IntersegmentEliminationMember2022-01-012022-12-310001653242us-gaap:IntersegmentEliminationMember2022-01-012022-12-310001653242ntb:CustomerSubsegmentMember2022-01-012022-12-310001653242us-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMember2022-01-012022-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberntb:BermudaSegmentMember2021-01-012021-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberntb:BermudaSegmentMember2021-01-012021-12-310001653242us-gaap:OperatingSegmentsMemberntb:BermudaSegmentMember2021-01-012021-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberntb:CaymanSegmentMember2021-01-012021-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberntb:CaymanSegmentMember2021-01-012021-12-310001653242us-gaap:OperatingSegmentsMemberntb:CaymanSegmentMember2021-01-012021-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2021-01-012021-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2021-01-012021-12-310001653242us-gaap:OperatingSegmentsMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2021-01-012021-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberus-gaap:AllOtherSegmentsMember2021-01-012021-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberus-gaap:AllOtherSegmentsMember2021-01-012021-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:AllOtherSegmentsMember2021-01-012021-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMember2021-01-012021-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMember2021-01-012021-12-310001653242us-gaap:OperatingSegmentsMember2021-01-012021-12-310001653242ntb:CustomerSubsegmentMemberus-gaap:IntersegmentEliminationMember2021-01-012021-12-310001653242us-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberus-gaap:IntersegmentEliminationMember2021-01-012021-12-310001653242us-gaap:IntersegmentEliminationMember2021-01-012021-12-310001653242ntb:CustomerSubsegmentMember2021-01-012021-12-310001653242us-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMember2021-01-012021-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberntb:BermudaSegmentMember2020-01-012020-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberntb:BermudaSegmentMember2020-01-012020-12-310001653242us-gaap:OperatingSegmentsMemberntb:BermudaSegmentMember2020-01-012020-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberntb:CaymanSegmentMember2020-01-012020-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberntb:CaymanSegmentMember2020-01-012020-12-310001653242us-gaap:OperatingSegmentsMemberntb:CaymanSegmentMember2020-01-012020-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2020-01-012020-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2020-01-012020-12-310001653242us-gaap:OperatingSegmentsMemberntb:ChannelIslandsAndUnitedKingdomSegmentMember2020-01-012020-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMemberus-gaap:AllOtherSegmentsMember2020-01-012020-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberus-gaap:AllOtherSegmentsMember2020-01-012020-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:AllOtherSegmentsMember2020-01-012020-12-310001653242us-gaap:ReportableSubsegmentsMemberus-gaap:OperatingSegmentsMemberntb:CustomerSubsegmentMember2020-01-012020-12-310001653242us-gaap:OperatingSegmentsMemberus-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMember2020-01-012020-12-310001653242us-gaap:OperatingSegmentsMember2020-01-012020-12-310001653242ntb:CustomerSubsegmentMemberus-gaap:IntersegmentEliminationMember2020-01-012020-12-310001653242us-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMemberus-gaap:IntersegmentEliminationMember2020-01-012020-12-310001653242us-gaap:IntersegmentEliminationMember2020-01-012020-12-310001653242ntb:CustomerSubsegmentMember2020-01-012020-12-310001653242us-gaap:IntersubsegmentEliminationsMemberntb:CustomerSubsegmentMember2020-01-012020-12-310001653242us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:NetInvestmentHedgingMember2022-12-310001653242us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMember2022-12-310001653242us-gaap:CurrencySwapMemberus-gaap:NondesignatedMember2022-12-310001653242ntb:RiskManagementDerivativesMember2022-12-310001653242ntb:SpotandForwardForeignExchangeMember2022-12-310001653242us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:NetInvestmentHedgingMember2021-12-310001653242us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMember2021-12-310001653242us-gaap:CurrencySwapMemberus-gaap:NondesignatedMember2021-12-310001653242ntb:RiskManagementDerivativesMember2021-12-310001653242ntb:SpotandForwardForeignExchangeMember2021-12-310001653242us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2022-12-31iso4217:EUR0001653242us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2021-12-31iso4217:CHF0001653242ntb:SpotandForwardForeignExchangeMember2022-01-012022-12-310001653242ntb:SpotandForwardForeignExchangeMember2021-01-012021-12-310001653242ntb:SpotandForwardForeignExchangeMember2020-01-012020-12-310001653242us-gaap:CurrencySwapMemberus-gaap:NondesignatedMember2022-01-012022-12-310001653242us-gaap:CurrencySwapMemberus-gaap:NondesignatedMember2021-01-012021-12-310001653242us-gaap:CurrencySwapMemberus-gaap:NondesignatedMember2020-01-012020-12-310001653242us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMember2022-01-012022-12-310001653242us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMember2021-01-012021-12-310001653242us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMember2020-01-012020-12-310001653242us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberntb:OtherComprehensiveIncomeLossForeignCurrencyTransactionandTranslationAdjustmentNetofTaxPortionAttributabletoParentMemberus-gaap:NetInvestmentHedgingMember2022-01-012022-12-310001653242us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberntb:OtherComprehensiveIncomeLossForeignCurrencyTransactionandTranslationAdjustmentNetofTaxPortionAttributabletoParentMemberus-gaap:NetInvestmentHedgingMember2021-01-012021-12-310001653242us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMemberntb:OtherComprehensiveIncomeLossForeignCurrencyTransactionandTranslationAdjustmentNetofTaxPortionAttributabletoParentMemberus-gaap:NetInvestmentHedgingMember2020-01-012020-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2022-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMember2022-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMember2021-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2022-12-310001653242us-gaap:FairValueMeasurementsRecurringMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-12-310001653242us-gaap:FairValueMeasurementsRecurringMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USTreasuryAndGovernmentMember2022-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2021-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:USTreasuryAndGovernmentMember2021-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USTreasuryAndGovernmentMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001653242us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2022-12-310001653242us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001653242us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-12-310001653242us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberntb:AssetbackedSecuritiesStudentLoansMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberntb:AssetbackedSecuritiesStudentLoansMember2022-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberntb:AssetbackedSecuritiesStudentLoansMember2022-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberntb:AssetbackedSecuritiesStudentLoansMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberntb:AssetbackedSecuritiesStudentLoansMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberntb:AssetbackedSecuritiesStudentLoansMember2021-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberntb:AssetbackedSecuritiesStudentLoansMember2021-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberntb:AssetbackedSecuritiesStudentLoansMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001653242us-gaap:FairValueMeasurementsRecurringMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001653242us-gaap:AvailableforsaleSecuritiesMember2021-12-310001653242us-gaap:AvailableforsaleSecuritiesMember2020-12-310001653242us-gaap:AvailableforsaleSecuritiesMember2019-12-310001653242us-gaap:AvailableforsaleSecuritiesMember2022-01-012022-12-310001653242us-gaap:AvailableforsaleSecuritiesMember2021-01-012021-12-310001653242us-gaap:AvailableforsaleSecuritiesMember2020-01-012020-12-310001653242us-gaap:AvailableforsaleSecuritiesMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:ChangeDuringPeriodFairValueDisclosureMember2022-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310001653242us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:ChangeDuringPeriodFairValueDisclosureMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:ChangeDuringPeriodFairValueDisclosureMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:ChangeDuringPeriodFairValueDisclosureMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CarryingReportedAmountFairValueDisclosureMemberntb:TimeDepositsMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberntb:TimeDepositsMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:ChangeDuringPeriodFairValueDisclosureMemberntb:TimeDepositsMember2022-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:CarryingReportedAmountFairValueDisclosureMemberntb:TimeDepositsMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:EstimateOfFairValueFairValueDisclosureMemberntb:TimeDepositsMember2021-12-310001653242us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:ChangeDuringPeriodFairValueDisclosureMemberntb:TimeDepositsMember2021-12-310001653242ntb:Within3MonthsMemberus-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMemberntb:InterestBearingFundsMember2022-12-310001653242us-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMemberntb:InterestBearingFundsMemberntb:Threeto6monthsMember2022-12-310001653242us-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMemberntb:InterestBearingFundsMemberntb:Sixto12MonthsMember2022-12-310001653242ntb:Oneto5yearsMemberus-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMemberntb:InterestBearingFundsMember2022-12-310001653242ntb:After5YearsMemberus-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMemberntb:InterestBearingFundsMember2022-12-310001653242ntb:NonInterestBearingFundsMemberus-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMember2022-12-310001653242us-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMember2022-12-310001653242ntb:Within3MonthsMemberus-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMemberntb:InterestBearingFundsMember2021-12-310001653242us-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMemberntb:InterestBearingFundsMemberntb:Threeto6monthsMember2021-12-310001653242us-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMemberntb:InterestBearingFundsMemberntb:Sixto12MonthsMember2021-12-310001653242ntb:Oneto5yearsMemberus-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMemberntb:InterestBearingFundsMember2021-12-310001653242ntb:After5YearsMemberus-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMemberntb:InterestBearingFundsMember2021-12-310001653242ntb:NonInterestBearingFundsMemberus-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMember2021-12-310001653242us-gaap:FairValueConcentrationOfRiskMarketRiskManagementGapAnalysisMember2021-12-310001653242us-gaap:SubordinatedDebtMember2005-06-27ntb:tranche0001653242ntb:SeriesANotesDue2015Memberus-gaap:SubordinatedDebtMember2005-06-270001653242ntb:SeriesBNotesDue2020Memberus-gaap:SubordinatedDebtMember2005-06-270001653242ntb:SeriesBNotesDue2020Memberus-gaap:UsTreasuryUstInterestRateMemberus-gaap:SubordinatedDebtMember2005-06-272005-06-270001653242ntb:SeriesBNotesDue2020Memberus-gaap:SubordinatedDebtMember2011-09-300001653242us-gaap:SubordinatedDebtMember2008-05-270001653242ntb:SeriesANotesDue2018Memberus-gaap:SubordinatedDebtMember2008-05-270001653242ntb:SeriesBNotesDue2023Memberus-gaap:SubordinatedDebtMember2008-05-270001653242ntb:NotesRedeemedinMay2008Memberus-gaap:SubordinatedDebtMember2008-05-272008-05-270001653242ntb:SeriesBNotesDue2023Memberus-gaap:UsTreasuryUstInterestRateMemberus-gaap:SubordinatedDebtMember2008-05-272008-05-270001653242us-gaap:SubordinatedDebtMemberntb:NotesDue2028Member2018-05-240001653242ntb:SeriesBNotesDue2018Memberus-gaap:SubordinatedDebtMember2018-05-242018-05-240001653242us-gaap:UsTreasuryUstInterestRateMemberus-gaap:SubordinatedDebtMemberntb:NotesDue2028Member2018-05-242018-05-240001653242us-gaap:SubordinatedDebtMemberntb:NotesDue2028Member2018-05-242018-05-240001653242ntb:NotesDue2030Memberus-gaap:SubordinatedDebtMember2020-06-110001653242ntb:SeriesBNotesDue2020Memberus-gaap:SubordinatedDebtMember2020-06-112020-06-110001653242us-gaap:UsTreasuryUstInterestRateMemberntb:NotesDue2030Memberus-gaap:SubordinatedDebtMember2020-06-112020-06-110001653242ntb:NotesDue2030Memberus-gaap:SubordinatedDebtMember2020-06-112020-06-110001653242us-gaap:SubordinatedDebtMemberntb:NotesDue2028Member2022-12-310001653242us-gaap:SubordinatedDebtMemberus-gaap:LondonInterbankOfferedRateLIBORMemberntb:NotesDue2028Member2022-01-012022-12-310001653242ntb:NotesDue2030Memberus-gaap:SubordinatedDebtMember2022-12-310001653242ntb:NotesDue2030Memberus-gaap:SubordinatedDebtMemberus-gaap:LondonInterbankOfferedRateLIBORMember2022-01-012022-12-310001653242us-gaap:SubordinatedDebtMember2022-12-310001653242us-gaap:CommonClassAMember2022-01-012022-12-310001653242us-gaap:CommonClassAMember2021-01-012021-12-310001653242us-gaap:CommonClassAMember2020-01-012020-12-310001653242us-gaap:EmployeeStockOptionMemberntb:TwoThousandTenOmnibusPlanMember2010-12-310001653242ntb:TwoThousandTenOmnibusPlanMember2010-12-310001653242ntb:TwoThousandTenOmnibusPlanMember2012-12-310001653242ntb:TwoThousandTenOmnibusPlanMember2016-12-310001653242ntb:A2020OmnibusPlanMember2020-05-310001653242us-gaap:EmployeeStockOptionMemberntb:A2010And2020OmnibusPlanMember2020-05-310001653242us-gaap:EmployeeStockOptionMemberntb:A2010And2020OmnibusPlanMember2010-01-012020-05-31ntb:vestingCondition0001653242ntb:TwoThousandTenOmnibusPlanMemberntb:TimeVestingEmployeeStockOptionMember2020-05-310001653242ntb:TwoThousandTenOmnibusPlanMemberus-gaap:ShareBasedCompensationAwardTrancheTwoMemberntb:TimeVestingEmployeeStockOptionMember2010-01-012020-05-310001653242ntb:TwoThousandTenOmnibusPlanMemberus-gaap:ShareBasedCompensationAwardTrancheOneMemberntb:TimeVestingEmployeeStockOptionMember2010-01-012020-05-310001653242ntb:SharebasedCompensationAwardTrancheFourMemberntb:TwoThousandTenOmnibusPlanMemberntb:TimeVestingEmployeeStockOptionMember2010-01-012020-05-310001653242us-gaap:ShareBasedCompensationAwardTrancheThreeMemberntb:TwoThousandTenOmnibusPlanMemberntb:TimeVestingEmployeeStockOptionMember2010-01-012020-05-310001653242ntb:TwoThousandTenOmnibusPlanMemberntb:TimeVestingEmployeeStockOptionMember2010-01-012020-05-310001653242ntb:PerformanceVestingEmployeeStockOptionMemberntb:TwoThousandTenOmnibusPlanMember2020-05-310001653242ntb:PerformanceVestingEmployeeStockOptionMemberntb:TwoThousandTenOmnibusPlanMember2016-09-210001653242ntb:TwoThousandTenOmnibusPlanMember2019-12-310001653242ntb:TwoThousandTenOmnibusPlanMember2020-01-012020-12-310001653242ntb:TwoThousandTenOmnibusPlanMember2020-12-310001653242ntb:TwoThousandTenOmnibusPlanMember2022-12-310001653242ntb:TwoThousandTenOmnibusPlanMember2021-12-310001653242us-gaap:StockCompensationPlanMember2022-01-012022-12-310001653242us-gaap:StockCompensationPlanMember2021-01-012021-12-310001653242us-gaap:StockCompensationPlanMember2020-01-012020-12-310001653242ntb:EmployeeDeferredIncentivePlanMemberus-gaap:RestrictedStockMember2022-01-012022-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlan2016201520142013Memberus-gaap:PerformanceSharesMember2013-01-012020-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlan2016201520142013Memberus-gaap:RestrictedStockMember2013-01-012020-12-310001653242us-gaap:EmployeeStockMember2022-12-310001653242us-gaap:EmployeeStockMember2022-01-012022-12-31ntb:offeringPeriod0001653242ntb:EmployeeDeferredIncentivePlanMemberus-gaap:RestrictedStockMember2021-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlanMemberntb:TimeVestingSharesandPerformanceSharesMember2021-12-310001653242ntb:EmployeeDeferredIncentivePlanMemberus-gaap:RestrictedStockMember2020-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlanMemberntb:TimeVestingSharesandPerformanceSharesMember2020-12-310001653242ntb:EmployeeDeferredIncentivePlanMemberus-gaap:RestrictedStockMember2019-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlanMemberntb:TimeVestingSharesandPerformanceSharesMember2019-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlanMemberntb:TimeVestingSharesandPerformanceSharesMember2022-01-012022-12-310001653242ntb:EmployeeDeferredIncentivePlanMemberus-gaap:RestrictedStockMember2021-01-012021-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlanMemberntb:TimeVestingSharesandPerformanceSharesMember2021-01-012021-12-310001653242ntb:EmployeeDeferredIncentivePlanMemberus-gaap:RestrictedStockMember2020-01-012020-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlanMemberntb:TimeVestingSharesandPerformanceSharesMember2020-01-012020-12-310001653242ntb:EmployeeDeferredIncentivePlanandExecutiveLongTermIncentiveSharePlanMember2022-01-012022-12-310001653242ntb:EmployeeDeferredIncentivePlanandExecutiveLongTermIncentiveSharePlanMember2021-01-012021-12-310001653242ntb:EmployeeDeferredIncentivePlanandExecutiveLongTermIncentiveSharePlanMember2020-01-012020-12-310001653242ntb:EmployeeDeferredIncentivePlanMemberus-gaap:RestrictedStockMember2022-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlanMemberntb:TimeVestingSharesandPerformanceSharesMember2022-12-310001653242us-gaap:RestrictedStockMemberntb:ExecutiveLongTermIncentiveSharePlanMember2022-12-310001653242us-gaap:RestrictedStockMemberntb:ExecutiveLongTermIncentiveSharePlanMember2022-01-012022-12-310001653242us-gaap:RestrictedStockMemberntb:ExecutiveLongTermIncentiveSharePlanMember2021-12-310001653242us-gaap:RestrictedStockMemberntb:ExecutiveLongTermIncentiveSharePlanMember2021-01-012021-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlanMemberus-gaap:PerformanceSharesMember2022-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlanMemberus-gaap:PerformanceSharesMember2022-01-012022-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlanMemberus-gaap:PerformanceSharesMember2021-12-310001653242ntb:ExecutiveLongTermIncentiveSharePlanMemberus-gaap:PerformanceSharesMember2021-01-012021-12-3100016532422018-12-0600016532422019-12-0200016532422021-02-1000016532422022-02-140001653242us-gaap:SubsequentEventMember2023-02-130001653242us-gaap:AccumulatedTranslationAdjustmentMember2021-12-310001653242us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberus-gaap:HeldtomaturitySecuritiesMember2021-12-310001653242us-gaap:AvailableforsaleSecuritiesMemberus-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-12-310001653242us-gaap:AccumulatedTranslationAdjustmentMember2022-01-012022-12-310001653242us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberus-gaap:HeldtomaturitySecuritiesMember2022-01-012022-12-310001653242us-gaap:AvailableforsaleSecuritiesMemberus-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-01-012022-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:PensionPlansDefinedBenefitMember2022-01-012022-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2022-01-012022-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-01-012022-12-310001653242us-gaap:AccumulatedTranslationAdjustmentMember2022-12-310001653242us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberus-gaap:HeldtomaturitySecuritiesMember2022-12-310001653242us-gaap:AvailableforsaleSecuritiesMemberus-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:PensionPlansDefinedBenefitMember2022-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2022-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2022-12-310001653242us-gaap:AccumulatedTranslationAdjustmentMember2020-12-310001653242us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberus-gaap:HeldtomaturitySecuritiesMember2020-12-310001653242us-gaap:AvailableforsaleSecuritiesMemberus-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-12-310001653242us-gaap:AccumulatedTranslationAdjustmentMember2021-01-012021-12-310001653242us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberus-gaap:HeldtomaturitySecuritiesMember2021-01-012021-12-310001653242us-gaap:AvailableforsaleSecuritiesMemberus-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-01-012021-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-01-012021-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-01-012021-12-310001653242us-gaap:AccumulatedTranslationAdjustmentMember2019-12-310001653242us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberus-gaap:HeldtomaturitySecuritiesMember2019-12-310001653242us-gaap:AvailableforsaleSecuritiesMemberus-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2019-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:PensionPlansDefinedBenefitMember2019-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2019-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2019-12-310001653242us-gaap:AccumulatedTranslationAdjustmentMember2020-01-012020-12-310001653242us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberus-gaap:HeldtomaturitySecuritiesMember2020-01-012020-12-310001653242us-gaap:AvailableforsaleSecuritiesMemberus-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-01-012020-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-01-012020-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-01-012020-12-310001653242ntb:ForeignCurrencyAdjustmentsAttributableToParentMember2022-01-012022-12-310001653242ntb:ForeignCurrencyAdjustmentsAttributableToParentMember2021-01-012021-12-310001653242ntb:ForeignCurrencyAdjustmentsAttributableToParentMember2020-01-012020-12-310001653242ntb:AccumulatedForeignCurrencyAdjustmentGainLossNetInvestmentHedgeAttributableToParentMember2022-01-012022-12-310001653242ntb:AccumulatedForeignCurrencyAdjustmentGainLossNetInvestmentHedgeAttributableToParentMember2021-01-012021-12-310001653242ntb:AccumulatedForeignCurrencyAdjustmentGainLossNetInvestmentHedgeAttributableToParentMember2020-01-012020-12-310001653242us-gaap:AvailableforsaleSecuritiesMemberus-gaap:AccumulatedTranslationAdjustmentMember2022-01-012022-12-310001653242us-gaap:AvailableforsaleSecuritiesMemberus-gaap:AccumulatedTranslationAdjustmentMember2021-01-012021-12-310001653242us-gaap:AvailableforsaleSecuritiesMemberus-gaap:AccumulatedTranslationAdjustmentMember2020-01-012020-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMemberus-gaap:PensionPlansDefinedBenefitMember2022-01-012022-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMemberus-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMemberus-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMemberus-gaap:PensionPlansDefinedBenefitMember2022-01-012022-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMemberus-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMemberus-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310001653242us-gaap:AccumulatedTranslationAdjustmentMemberus-gaap:PensionPlansDefinedBenefitMember2022-01-012022-12-310001653242us-gaap:AccumulatedTranslationAdjustmentMemberus-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310001653242us-gaap:AccumulatedTranslationAdjustmentMemberus-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2022-01-012022-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-01-012021-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-01-012020-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2022-01-012022-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-01-012021-12-310001653242us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-01-012020-12-310001653242ntb:CommonStockIssuedAndCommonStockAuthorizedButUnissuedMember2022-12-31iso4217:BMDxbrli:shares0001653242currency:USD2022-12-310001653242currency:GBP2022-12-31iso4217:GBPxbrli:shares0001653242us-gaap:SubsequentEventMember2023-02-132023-02-130001653242ntb:UnitedKingdomSegmentMember2022-12-310001653242ntb:UnitedKingdomSegmentMember2021-12-310001653242us-gaap:ForeignCountryMember2022-12-310001653242us-gaap:ForeignCountryMember2021-12-310001653242srt:ManagementMember2020-12-310001653242srt:ManagementMember2021-01-012021-12-310001653242srt:ManagementMember2021-12-310001653242srt:ManagementMember2022-01-012022-12-310001653242srt:ManagementMember2022-12-310001653242srt:ManagementMember2020-01-012020-12-310001653242srt:AffiliatedEntityMember2022-12-310001653242srt:AffiliatedEntityMember2021-12-310001653242srt:AffiliatedEntityMember2022-01-012022-12-310001653242srt:AffiliatedEntityMember2021-01-012021-12-310001653242srt:AffiliatedEntityMember2020-01-012020-12-310001653242us-gaap:AssetManagementArrangementMembersrt:AffiliatedEntityMember2022-12-310001653242us-gaap:AssetManagementArrangementMembersrt:AffiliatedEntityMember2021-12-310001653242us-gaap:AssetManagementArrangementMembersrt:AffiliatedEntityMember2022-01-012022-12-310001653242us-gaap:AssetManagementArrangementMembersrt:AffiliatedEntityMember2021-01-012021-12-310001653242us-gaap:AssetManagementArrangementMembersrt:AffiliatedEntityMember2020-01-012020-12-310001653242srt:ParentCompanyMember2022-12-310001653242srt:ParentCompanyMember2021-12-310001653242srt:ParentCompanyMemberntb:BanksMember2022-12-310001653242srt:ParentCompanyMemberntb:BanksMember2021-12-310001653242srt:ParentCompanyMemberntb:IndividualCustomersMember2022-12-310001653242srt:ParentCompanyMemberntb:IndividualCustomersMember2021-12-310001653242srt:ParentCompanyMember2022-01-012022-12-310001653242srt:ParentCompanyMember2021-01-012021-12-310001653242srt:ParentCompanyMember2020-01-012020-12-310001653242srt:ParentCompanyMemberntb:BanksMember2022-01-012022-12-310001653242srt:ParentCompanyMemberntb:BanksMember2021-01-012021-12-310001653242srt:ParentCompanyMemberntb:BanksMember2020-01-012020-12-310001653242srt:ParentCompanyMemberntb:IndividualCustomersMember2022-01-012022-12-310001653242srt:ParentCompanyMemberntb:IndividualCustomersMember2021-01-012021-12-310001653242srt:ParentCompanyMemberntb:IndividualCustomersMember2020-01-012020-12-310001653242srt:ParentCompanyMember2020-12-310001653242srt:ParentCompanyMember2019-12-31