10-K Filing

NB BANCORP, INC. CIK: 1979330 FY 2023

Filing Information

Form Type	10-K
Accession Number	`0001558370-24-004193`
Period End Date	20231231
Filing Date	20240328
Fiscal Year	2023
Fiscal Period	FY
XBRL Instance	nbbk-20231231x10k_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 81 Income Statement 65 Cash Flow Statement 85 Stockholders Equity 16 Comprehensive Income 16

Balance Sheet 81 line items

Line Item	Tag	Value	Unit	Period
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	`PreferredStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	`PreferredStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Cash and due from banks	`CashAndDueFromBanks`	$90.48M	USD	Point-in-time
Cash and due from banks	`CashAndDueFromBanks`	$131.07M	USD	Point-in-time
Preferred Stock, Shares Authorized	`PreferredStockSharesAuthorized`	5.00M	shares	Point-in-time
Preferred Stock, Shares Authorized	`PreferredStockSharesAuthorized`	5.00M	shares	Point-in-time
Federal funds sold	`FederalFundsSold`	$182.11M	USD	Point-in-time
Preferred Stock, Shares Issued	`PreferredStockSharesIssued`	0.00	shares	Point-in-time
Federal funds sold	`FederalFundsSold`	$25.47M	USD	Point-in-time
Preferred Stock, Shares Issued	`PreferredStockSharesIssued`	0.00	shares	Point-in-time
Total cash and cash equivalents	`CashCashEquivalentsAndFederalFundsSold`	$272.59M	USD	Point-in-time
Preferred Stock, Shares Outstanding	`PreferredStockSharesOutstanding`	0.00	shares	Point-in-time
Preferred Stock, Shares Outstanding	`PreferredStockSharesOutstanding`	0.00	shares	Point-in-time
Total cash and cash equivalents	`CashCashEquivalentsAndFederalFundsSold`	$156.54M	USD	Point-in-time
Available-for-sale securities, at fair value	`DebtSecuritiesAvailableForSaleExcludingAccruedInterest`	$189.47M	USD	Point-in-time
Common Stock, Par or Stated Value Per Share (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common Stock, Par or Stated Value Per Share (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common Stock, Shares Authorized	`CommonStockSharesAuthorized`	120.00M	shares	Point-in-time
Available-for-sale securities, at fair value	`AvailableForSaleSecuritiesDebtSecurities`	$245.48M	USD	Point-in-time
Common Stock, Shares Authorized	`CommonStockSharesAuthorized`	120.00M	shares	Point-in-time
Common Stock, Shares, Issued	`CommonStockSharesIssued`	42.71M	shares	Point-in-time
Common Stock, Shares, Issued	`CommonStockSharesIssued`	0.00	shares	Point-in-time
Loans receivable	`LoansAndLeasesReceivableNetOfDeferredIncome`	$3.02B	USD	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	0.00	shares	Point-in-time
Common Stock, Shares, Outstanding	`CommonStockSharesOutstanding`	42.71M	shares	Point-in-time
Loans receivable	`FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss`	$3.89B	USD	Point-in-time
Allowance for credit losses	`LoansAndLeasesReceivableAllowance`	$25.03M	USD	Point-in-time
Allowance for credit losses	`LoansAndLeasesReceivableAllowance`	$18.41M	USD	Point-in-time
Allowance for credit losses	`FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest`	$25.03M	USD	Point-in-time
Allowance for credit losses	`FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest`	$32.22M	USD	Point-in-time
Net loans	`LoansAndLeasesReceivableNetReportedAmount`	$2.99B	USD	Point-in-time
Net loans	`FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss`	$3.86B	USD	Point-in-time
Accrued interest receivable	`InterestReceivable`	$10.84M	USD	Point-in-time
Accrued interest receivable	`InterestReceivable`	$17.28M	USD	Point-in-time
Banking premises and equipment, net	`PropertyPlantAndEquipmentNet`	$35.53M	USD	Point-in-time
Banking premises and equipment, net	`PropertyPlantAndEquipmentNet`	$35.34M	USD	Point-in-time
Depositors Insurance Fund stock	`DepositorsInsuranceFund`	$139.00K	USD	Point-in-time
Depositors Insurance Fund stock	`DepositorsInsuranceFund`	$139.00K	USD	Point-in-time
Federal Home Loan Bank stock	`FederalHomeLoanBankStock`	$14.56M	USD	Point-in-time
Federal Home Loan Bank stock	`FederalHomeLoanBankStock`	$13.18M	USD	Point-in-time
Federal Reserve Bank stock	`FederalReserveBankStock`	$8.10M	USD	Point-in-time
Federal Reserve Bank stock	`FederalReserveBankStock`	$10.32M	USD	Point-in-time
Non-public investments	`NonPublicInvestments`	$10.59M	USD	Point-in-time
Non-public investments	`NonPublicInvestments`	$13.71M	USD	Point-in-time
Bank owned life insurance ("BOLI")	`BankOwnedLifeInsurance`	$49.01M	USD	Point-in-time
Bank owned life insurance ("BOLI")	`BankOwnedLifeInsurance`	$50.52M	USD	Point-in-time
Prepaid expenses and other assets	`PrepaidExpenseAndOtherAssets`	$57.17M	USD	Point-in-time
Prepaid expenses and other assets	`PrepaidExpenseAndOtherAssets`	$53.11M	USD	Point-in-time
Income tax refunds receivable	`IncomeTaxReceivable`	$4.13M	USD	Point-in-time
Deferred income tax asset	`DeferredIncomeTaxAssetsNet`	$19.13M	USD	Point-in-time
Deferred income tax asset	`DeferredIncomeTaxAssetsNet`	$11.39M	USD	Point-in-time
Total assets	`Assets`	$4.53B	USD	Point-in-time
Total assets	`Assets`	$3.59B	USD	Point-in-time
Deposits	`Deposits`	$2.89B	USD	Point-in-time
Deposits	`Deposits`	$3.39B	USD	Point-in-time
Mortgagors' escrow accounts	`AdvancePaymentsByBorrowersForTaxesAndInsurance`	$4.23M	USD	Point-in-time
Mortgagors' escrow accounts	`AdvancePaymentsByBorrowersForTaxesAndInsurance`	$4.06M	USD	Point-in-time
FHLB Borrowings	`AdvancesFromFederalHomeLoanBanks`	$283.34M	USD	Point-in-time
FHLB Borrowings	`AdvancesFromFederalHomeLoanBanks`	$293.08M	USD	Point-in-time
Accrued expenses and other liabilities	`AccruedLiabilitiesAndOtherLiabilities`	$81.33M	USD	Point-in-time
Accrued expenses and other liabilities	`AccruedLiabilitiesAndOtherLiabilities`	$52.40M	USD	Point-in-time
Accrued retirement liabilities	`AccruedRetirementLiabilities`	$19.21M	USD	Point-in-time
Accrued retirement liabilities	`AccruedRetirementLiabilities`	$11.98M	USD	Point-in-time
Total liabilities	`Liabilities`	$3.78B	USD	Point-in-time
Total liabilities	`Liabilities`	$3.25B	USD	Point-in-time
Commitments and contingencies (Notes 6, 8 & 12)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies (Notes 6, 8 & 12)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Preferred stock, $0.01 par value, 5,000,000 shares authorized; no shares issued and outstanding	`PreferredStockValue`	-	USD	Point-in-time
Preferred stock, $0.01 par value, 5,000,000 shares authorized; no shares issued and outstanding	`PreferredStockValue`	-	USD	Point-in-time
Common shares, $0.01 par value, 120,000,000 shares authorized; 42,705,729 shares issued and outstanding at December 31, 2023; no shares issued and outstanding at December 31, 2022	`CommonStockValue`	$427.00K	USD	Point-in-time
Additional paid in capital	`AdditionalPaidInCapital`	$417.03M	USD	Point-in-time
Unallocated common shares held by the Employee Stock Ownership Plan	`UnearnedESOPShares`	$13.77M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$358.47M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$366.17M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-14.40M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-11.90M	USD	Point-in-time
Total shareholders' equity	`StockholdersEquity`	$757.96M	USD	Point-in-time
Total shareholders' equity	`StockholdersEquity`	$326.13M	USD	Point-in-time
Total shareholders' equity	`StockholdersEquity`	$344.06M	USD	Point-in-time
Total liabilities and shareholders' equity	`LiabilitiesAndStockholdersEquity`	$3.59B	USD	Point-in-time
Total liabilities and shareholders' equity	`LiabilitiesAndStockholdersEquity`	$4.53B	USD	Point-in-time

Income Statement 65 line items

Line Item	Tag	Value	Unit	Period
Interest and fees on loans	`InterestAndFeeIncomeLoansAndLeases`	$211.97M	USD	Annual
Interest and fees on loans	`InterestAndFeeIncomeLoansAndLeases`	$113.76M	USD	Annual
Interest on investments securities	`InterestIncomeDebtSecuritiesOperating`	$4.77M	USD	Annual
Interest on investments securities	`InterestIncomeDebtSecuritiesOperating`	$4.95M	USD	Annual
Interest on cash equivalents and other	`InterestIncomeCashEquivalentsAndOther`	$1.80M	USD	Annual
Interest on cash equivalents and other	`InterestIncomeCashEquivalentsAndOther`	$3.75M	USD	Annual
Total interest and dividend income	`InterestAndDividendIncomeOperating`	$220.50M	USD	Annual
Total interest and dividend income	`InterestAndDividendIncomeOperating`	$120.51M	USD	Annual
Interest on deposits	`InterestExpenseDeposits`	$76.39M	USD	Annual
Interest on deposits	`InterestExpenseDeposits`	$12.69M	USD	Annual
Interest on FHLB borrowings	`InterestExpenseBorrowings`	$2.86M	USD	Annual
Interest on FHLB borrowings	`InterestExpenseBorrowings`	$14.05M	USD	Annual
Total interest expense	`InterestExpense`	$90.44M	USD	Annual
Total interest expense	`InterestExpense`	$15.55M	USD	Annual
NET INTEREST INCOME	`InterestIncomeExpenseNet`	$104.96M	USD	Annual
NET INTEREST INCOME	`InterestIncomeExpenseNet`	$130.06M	USD	Annual
Provision for credit losses - allowance for credit losses	`FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal`	$6.70M	USD	Annual
Provision for credit losses - allowance for credit losses	`FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal`	$9.66M	USD	Annual
Provision for credit losses - allowance for unfunded commitments	`OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal`	$4.23M	USD	Annual
Total provision for credit losses	`ProvisionForLoanLossesExpensed`	$13.88M	USD	Annual
Total provision for credit losses	`ProvisionForLoanLossesExpensed`	$6.70M	USD	Annual
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	`InterestIncomeExpenseAfterProvisionForLoanLoss`	$98.26M	USD	Annual
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	`InterestIncomeExpenseAfterProvisionForLoanLoss`	$116.17M	USD	Annual
Gain from bargain purchase and assumption agreement	`BusinessCombinationBargainPurchaseGainRecognizedAmount`	$1.07M	USD	Annual
Customer service fees	`InvestmentBankingRevenue`	$7.82M	USD	Annual
Customer service fees	`InvestmentBankingRevenue`	$5.14M	USD	Annual
Increase in cash surrender value of BOLI	`BankOwnedLifeInsuranceIncome`	$1.51M	USD	Annual
Increase in cash surrender value of BOLI	`BankOwnedLifeInsuranceIncome`	$1.16M	USD	Annual
Mortgage banking income	`FeesAndCommissionsMortgageBankingAndServicing`	$595.00K	USD	Annual
Mortgage banking income	`FeesAndCommissionsMortgageBankingAndServicing`	$581.00K	USD	Annual
Swap contract income	`GainLossOnSaleOfDerivatives`	$2.15M	USD	Annual
Swap contract income	`GainLossOnSaleOfDerivatives`	$1.26M	USD	Annual
Employee retention credit income	`EmployeeRetentionCreditIncome`	$3.45M	USD	Annual
Other income	`NoninterestIncomeOtherOperatingIncome`	$64.00K	USD	Annual
Other income	`NoninterestIncomeOtherOperatingIncome`	$53.00K	USD	Annual
Total noninterest income	`NoninterestIncome`	$9.28M	USD	Annual
Total noninterest income	`NoninterestIncome`	$15.58M	USD	Annual
Salaries and employee benefits	`LaborAndRelatedExpense`	$47.47M	USD	Annual
Salaries and employee benefits	`LaborAndRelatedExpense`	$68.34M	USD	Annual
Director and professional service fees	`NoninterestExpenseDirectorsAndProfessionalFees`	$6.23M	USD	Annual
Director and professional service fees	`NoninterestExpenseDirectorsAndProfessionalFees`	$4.76M	USD	Annual
Occupancy and equipment expenses	`OccupancyAndEquipmentExpenses`	$4.35M	USD	Annual
Occupancy and equipment expenses	`OccupancyAndEquipmentExpenses`	$5.19M	USD	Annual
Data processing expenses	`InformationTechnologyAndDataProcessing`	$7.50M	USD	Annual
Data processing expenses	`InformationTechnologyAndDataProcessing`	$5.66M	USD	Annual
Charitable contribution expense	`CharityContributionExpense`	$1.07M	USD	Annual
Charitable contribution expense	`CharityContributionExpense`	$20.34M	USD	Annual
Marketing expense	`MarketingExpense`	$2.75M	USD	Annual
Marketing expense	`MarketingExpense`	$2.34M	USD	Annual
FDIC and state insurance assessments	`FederalDepositInsuranceCorporationPremiumExpense`	$4.71M	USD	Annual
FDIC and state insurance assessments	`FederalDepositInsuranceCorporationPremiumExpense`	$1.83M	USD	Annual
General and administrative expenses	`GeneralAndAdministrativeExpense`	$4.85M	USD	Annual
General and administrative expenses	`GeneralAndAdministrativeExpense`	$3.68M	USD	Annual
Total noninterest expense	`NoninterestExpense`	$119.91M	USD	Annual
Total noninterest expense	`NoninterestExpense`	$71.15M	USD	Annual
INCOME BEFORE TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$11.84M	USD	Annual
INCOME BEFORE TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$36.39M	USD	Annual
INCOME TAXES	`IncomeTaxExpenseBenefit`	$6.32M	USD	Annual
INCOME TAXES	`IncomeTaxExpenseBenefit`	$2.02M	USD	Annual
NET INCOME	`NetIncomeLoss`	$30.07M	USD	Annual
NET INCOME	`NetIncomeLoss`	$9.82M	USD	Annual
Weighted average common shares outstanding, Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	42.02M	shares	Annual
Weighted Average Number of Shares Outstanding, Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	42.02M	shares	Annual
Earnings Per Share, Basic	`EarningsPerShareBasic`	$0.23	USD	Annual
Earnings Per Share, Diluted	`EarningsPerShareDiluted`	$0.23	USD	Annual

Cash Flow Statement 85 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$9.82M	USD	Annual
Net income	`ProfitLoss`	$30.07M	USD	Annual
Net (accretion) amortization of investment securities	`AccretionAmortizationOfDiscountsAndPremiumsInvestments`	$240.00K	USD	Annual
Net (accretion) amortization of investment securities	`AccretionAmortizationOfDiscountsAndPremiumsInvestments`	$-71.00K	USD	Annual
Gain from bargain purchase and assumption agreement	`BusinessCombinationBargainPurchaseGainRecognizedAmount`	$1.07M	USD	Annual
Amortization of core deposit intangible	`AmortizationOfIntangibleAssets`	$111.00K	USD	Annual
Amortization of core deposit intangible	`AmortizationOfIntangibleAssets`	$149.00K	USD	Annual
Provision for credit losses	`ProvisionForLoanLeaseAndOtherLosses`	$6.70M	USD	Annual
Provision for credit losses	`ProvisionForLoanLeaseAndOtherLosses`	$13.88M	USD	Annual
Loan hedge fair value adjustments, including amortization	`FairValueAdjustmentsOfLoanHedgedIncludingAmortization`	$161.00K	USD	Annual
Loan hedge fair value adjustments, including amortization	`FairValueAdjustmentsOfLoanHedgedIncludingAmortization`	$502.00K	USD	Annual
Change in net deferred loan origination fees	`AmortizationOfDeferredLoanOriginationFeesNet`	$-2.52M	USD	Annual
Change in net deferred loan origination fees	`AmortizationOfDeferredLoanOriginationFeesNet`	$-4.42M	USD	Annual
Mortgage loans originated for sale	`PaymentsForOriginationOfMortgageLoansHeldForSale`	$1.84M	USD	Annual
Mortgage loans originated for sale	`PaymentsForOriginationOfMortgageLoansHeldForSale`	$2.40M	USD	Annual
Proceeds from sale of mortgage loans held for sale	`ProceedsFromSaleOfMortgageLoansHeldForSale`	$2.40M	USD	Annual
Proceeds from sale of mortgage loans held for sale	`ProceedsFromSaleOfMortgageLoansHeldForSale`	$1.89M	USD	Annual
Gain on sale of mortgage loans	`GainLossOnSaleOfMortgageLoans`	$5.00K	USD	Annual
Gain on sale of mortgage loans	`GainLossOnSaleOfMortgageLoans`	$47.00K	USD	Annual
Depreciation and amortization expense	`OtherDepreciationAndAmortization`	$2.36M	USD	Annual
Depreciation and amortization expense	`OtherDepreciationAndAmortization`	$2.68M	USD	Annual
Increase in cash surrender values of bank owned life insurance	`LifeInsuranceCorporateOrBankOwnedChangeInValue`	$1.16M	USD	Annual
Increase in cash surrender values of bank owned life insurance	`LifeInsuranceCorporateOrBankOwnedChangeInValue`	$1.51M	USD	Annual
Deferred income taxes (credits)	`DeferredIncomeTaxesAndTaxCredits`	$-1.25M	USD	Annual
Deferred income taxes (credits)	`DeferredIncomeTaxesAndTaxCredits`	$-7.72M	USD	Annual
Accrued interest receivable	`IncreaseDecreaseInAccruedInterestReceivableNet`	$6.45M	USD	Annual
Accrued interest receivable	`IncreaseDecreaseInAccruedInterestReceivableNet`	$3.30M	USD	Annual
Prepaid expenses and other assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$22.80M	USD	Annual
Prepaid expenses and other assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-3.91M	USD	Annual
Income tax refunds receivable	`IncreaseDecreaseInIncomeTaxesReceivable`	$-4.13M	USD	Annual
Income tax refunds receivable	`IncreaseDecreaseInIncomeTaxesReceivable`	$4.15M	USD	Annual
Accrued expenses and other liabilities	`IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities`	$27.22M	USD	Annual
Accrued expenses and other liabilities	`IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities`	$22.59M	USD	Annual
Accrued retirement liabilities	`IncreaseDecreaseInAccruedRetirementLiabilities`	$3.89M	USD	Annual
Accrued retirement liabilities	`IncreaseDecreaseInAccruedRetirementLiabilities`	$7.12M	USD	Annual
NET CASH PROVIDED FROM OPERATING ACTIVITIES	`NetCashProvidedByUsedInOperatingActivities`	$39.71M	USD	Annual
NET CASH PROVIDED FROM OPERATING ACTIVITIES	`NetCashProvidedByUsedInOperatingActivities`	$52.96M	USD	Annual
Loan originations and pools purchased, net of repayments	`ProceedsFromLoanOriginationsNetOfRepayments`	$882.04M	USD	Annual
Loan originations and pools purchased, net of repayments	`ProceedsFromLoanOriginationsNetOfRepayments`	$913.80M	USD	Annual
Purchases of available-for-sale securities	`PaymentsToAcquireAvailableForSaleSecuritiesDebt`	$43.59M	USD	Annual
Purchases of available-for-sale securities	`PaymentsToAcquireAvailableForSaleSecuritiesDebt`	$174.05M	USD	Annual
Maturities, calls and principal repayments of available-for-sale securities	`ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities`	$170.59M	USD	Annual
Maturities, calls and principal repayments of available-for-sale securities	`ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities`	$103.58M	USD	Annual
Purchases of Federal Home Loan Bank stock, net	`PaymentsToAcquireFederalHomeLoanBankStock`	$1.38M	USD	Annual
Purchases of Federal Home Loan Bank stock, net	`PaymentsToAcquireFederalHomeLoanBankStock`	$10.90M	USD	Annual
Purchases of Federal Reserve Bank stock, net	`PaymentsToAcquireFederalReserveStock`	$2.22M	USD	Annual
Purchases of Federal Reserve Bank stock, net	`PaymentsToAcquireFederalReserveStock`	$508.00K	USD	Annual
Net change in non-public investments	`PaymentsForProceedsFromNonPublicInvestments`	$-3.12M	USD	Annual
Net change in non-public investments	`PaymentsForProceedsFromNonPublicInvestments`	$-6.31M	USD	Annual
Cash acquired under purchase and assumption agreement	`CashAcquiredFromAcquisition`	$297.67M	USD	Annual
Premiums paid on bank-owned life insurance	`PaymentsToAcquireLifeInsurancePolicies`	$22.20M	USD	Annual
Purchases of banking premises and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.87M	USD	Annual
Purchases of banking premises and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$8.50M	USD	Annual
NET CASH USED IN INVESTING ACTIVITIES	`NetCashProvidedByUsedInInvestingActivities`	$-831.62M	USD	Annual
NET CASH USED IN INVESTING ACTIVITIES	`NetCashProvidedByUsedInInvestingActivities`	$-667.99M	USD	Annual
Net change in deposits	`IncreaseDecreaseInDeposits`	$24.53M	USD	Annual
Net change in deposits	`IncreaseDecreaseInDeposits`	$500.61M	USD	Annual
Net change in mortgagors' escrow accounts	`IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance`	$414.00K	USD	Annual
Net change in mortgagors' escrow accounts	`IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance`	$165.00K	USD	Annual
Net proceeds from stock offering and issuance of common shares	`ProceedsFromIssuanceOfCommonStock`	$417.46M	USD	Annual
Purchase of common shares by the ESOP	`PaymentsForPurchaseOfCommonSharesByEmployeeStockOwnershipPlan`	$13.77M	USD	Annual
(Increase) decrease in FHLB borrowings, net	`IncreaseDecreaseInLoansFromOtherFederalHomeLoanBanks`	$292.83M	USD	Annual
(Increase) decrease in FHLB borrowings, net	`IncreaseDecreaseInLoansFromOtherFederalHomeLoanBanks`	$-9.74M	USD	Annual
NET CASH PROVIDED FROM FINANCING ACTIVITIES	`NetCashProvidedByUsedInFinancingActivities`	$894.71M	USD	Annual
NET CASH PROVIDED FROM FINANCING ACTIVITIES	`NetCashProvidedByUsedInFinancingActivities`	$317.77M	USD	Annual
RESULTING IN A NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-310.50M	USD	Annual
RESULTING IN A NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$116.05M	USD	Annual
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$467.05M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$156.54M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$272.59M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$467.05M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$156.54M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$272.59M	USD	Point-in-time
Interest	`InterestPaidNet`	$88.75M	USD	Annual
Interest	`InterestPaidNet`	$6.58M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$8.56M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$4.79M	USD	Annual
Cumulative effect adjustment due to adoption of CECL accounting standard under ASC 326, net of income taxes	`NoncashCumulativeEffectAdjustmentDueToAdoptionOfNetOfIncomeTaxes`	$-2.12M	USD	Annual
Initial recognition of right of use assets under ASC 842	`NoncashInitialRecognitionOfRightOfUseAssets`	$-1.50M	USD	Annual
Initial recognition of operating lease liabilities under ASC 842	`NoncashInitialRecognitionOfOperatingLeaseLiabilities`	$1.50M	USD	Annual
Unrealized gains (losses) on securities available for sale	`DebtSecuritiesAvailableForSaleUnrealizedGainLoss`	$-19.01M	USD	Annual
Unrealized gains (losses) on securities available for sale	`DebtSecuritiesAvailableForSaleUnrealizedGainLoss`	$731.00K	USD	Annual
Unrecognized Pension Losses on Director Pension Plan	`UnrecognizedPensionLossesOnDirectorPensionPlan`	$106.00K	USD	Annual
Unrealized holding (losses) gains on cash flow hedge	`UnrealizedGainLossOnCashFlowHedgingInstruments`	$1.81M	USD	Annual
Unrealized holding (losses) gains on cash flow hedge	`UnrealizedGainLossOnCashFlowHedgingInstruments`	$-321.00K	USD	Annual

Stockholders Equity 16 line items

Line Item	Tag	Value	Unit	Period
Stock offering and issuance	`StockIssuedIssuanceCosts`	$9.60M	USD	Annual
Common shares ESOP	`SharesPuchaseByEmployeeStockOwnershipPlanShares`	1.00M	shares	Annual
Balance at the beginning	`StockholdersEquity`	$757.96M	USD	Point-in-time
Balance at the beginning	`StockholdersEquity`	$326.13M	USD	Point-in-time
Balance at the beginning	`StockholdersEquity`	$344.06M	USD	Point-in-time
Net income	`NetIncomeLoss`	$30.07M	USD	Annual
Net income	`NetIncomeLoss`	$9.82M	USD	Annual
Other comprehensive income, net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$2.50M	USD	Annual
Other comprehensive income, net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-12.13M	USD	Annual
Proceeds of stock offering and issuance of common shares (net of costs of $9,600)	`StockIssuedDuringPeriodValueNewIssues`	$400.38M	USD	Annual
Issuance of common shares donated to Needham Bank Charitable Foundation	`StockIssuedDuringPeriodValueIssuedCharity`	$17.08M	USD	Annual
Issuance of common shares donated to Needham Bank Charitable Foundation (in shares)	`StockIssuedDuringPeriodIssuedCharitySharesNewIssues`	1.71M	shares	Point-in-time
Purchase of common shares by the ESOP (1,000,000 shares)	`SharesPurchaseByEmployeeStockOwnershipPlanValue`	$13.77M	USD	Annual
Balance at the end	`StockholdersEquity`	$757.96M	USD	Point-in-time
Balance at the end	`StockholdersEquity`	$326.13M	USD	Point-in-time
Balance at the end	`StockholdersEquity`	$344.06M	USD	Point-in-time

Comprehensive Income 16 line items

Line Item	Tag	Value	Unit	Period
Net Income (Loss)	`NetIncomeLoss`	$30.07M	USD	Annual
Net Income (Loss)	`NetIncomeLoss`	$9.82M	USD	Annual
Unrealized Holding Gains (Losses) on AFS Securities	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax`	$-17.66M	USD	Annual
Unrealized Holding Gains (Losses) on AFS Securities	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax`	$3.74M	USD	Annual
Unrecognized Pension Losses on Director Pension Plan	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax`	$200.00K	USD	Annual
Unrecognized Pension Losses on Director Pension Plan	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax`	$106.00K	USD	Annual
Unrealized Holding (Losses) Gains on Cash Flow Hedge	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax`	$1.55M	USD	Annual
Unrealized Holding (Losses) Gains on Cash Flow Hedge	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax`	$-321.00K	USD	Annual
OTHER COMPREHENSIVE INCOME (LOSS), BEFORE TAX PROVISIONS	`OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent`	$3.31M	USD	Annual
OTHER COMPREHENSIVE INCOME (LOSS), BEFORE TAX PROVISIONS	`OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent`	$-16.31M	USD	Annual
INCOME TAX (BENEFIT) PROVISIONS	`OtherComprehensiveIncomeLossTaxPortionAttributableToParent1`	$809.00K	USD	Annual
INCOME TAX (BENEFIT) PROVISIONS	`OtherComprehensiveIncomeLossTaxPortionAttributableToParent1`	$-4.18M	USD	Annual
OTHER COMPREHENSIVE INCOME (LOSS), AFTER TAX PROVISIONS	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-12.13M	USD	Annual
OTHER COMPREHENSIVE INCOME (LOSS), AFTER TAX PROVISIONS	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$2.50M	USD	Annual
COMPREHENSIVE INCOME	`ComprehensiveIncomeNetOfTax`	$17.94M	USD	Annual
COMPREHENSIVE INCOME	`ComprehensiveIncomeNetOfTax`	$12.33M	USD	Annual

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.