$NFBK
Northfield Bancorp, Inc. Stock $nfbk

$nfbk Overview Financials Valuation SEC Filings Company Website

2023 Q3 Form 10-Q Financial Statement

#000149322523000099 Filed on August 09, 2023

Income Statement

Concept	2023 Q3	2023 Q2
Revenue	$1.317M	$1.309M
YoY Change	-12.2%	-96.99%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$970.0K	$954.0K
YoY Change	3.74%	0.32%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$23.04M	$20.51M
YoY Change	337.52%	508.4%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$11.06M	$13.17M
YoY Change	-53.39%	-40.09%
Income Tax	$2.877M	$3.613M
% Of Pretax Income	26.02%	27.43%
Net Earnings	$8.181M	$9.559M
YoY Change	-51.82%	-39.78%
Net Earnings / Revenue	621.18%	730.25%
Basic Earnings Per Share	$0.19	$0.22
Diluted Earnings Per Share	$0.19	$0.22
COMMON SHARES
Basic Shares Outstanding	44.99M shares	46.53M shares
Diluted Shares Outstanding	42.92M shares	43.95M shares

Balance Sheet

Concept	2023 Q3	2023 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$80.56M	$89.13M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$24.15M	$24.57M
YoY Change	-4.84%	-4.63%
Goodwill	$41.01M	$41.01M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$5.437B	$5.541B
YoY Change	-4.1%	-1.88%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$26.00M	$29.12M
YoY Change	-0.52%	-1.16%
Accrued Expenses	$78.40M	$76.01M
YoY Change	1.32%	-0.62%
Deferred Revenue
YoY Change
Short-Term Debt	$25.00M	$25.00M
YoY Change	0.0%	0.0%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$129.4M	$130.1M
YoY Change	25.0%	22.83%
LONG-TERM LIABILITIES
Long-Term Debt	$955.1M	$959.6M
YoY Change	115.3%	150.6%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$955.1M	$959.6M
YoY Change	115.3%	150.6%
TOTAL LIABILITIES
Total Short-Term Liabilities	$129.4M	$130.1M
Total Long-Term Liabilities	$955.1M	$959.6M
Total Liabilities	$4.753B	$4.854B
YoY Change	-4.49%	-1.58%
SHAREHOLDERS EQUITY
Retained Earnings	$430.5M	$427.9M
YoY Change	4.97%	7.21%
Common Stock	$648.0K	$648.0K
YoY Change	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$684.1M	$686.6M
YoY Change
Total Liabilities & Shareholders Equity	$5.437B	$5.541B
YoY Change	-4.1%	-1.88%

Cashflow Statement

Concept	2023 Q3	2023 Q2
OPERATING ACTIVITIES
Net Income	$8.181M	$9.559M
YoY Change	-51.82%	-39.78%
Depreciation, Depletion And Amortization	$970.0K	$954.0K
YoY Change	3.74%	0.32%
Cash From Operating Activities	$11.66M	$3.268M
YoY Change	-35.14%	-84.28%
INVESTING ACTIVITIES
Capital Expenditures	$520.0K	$822.0K
YoY Change	-201.17%	-162.23%
Acquisitions
YoY Change
Other Investing Activities	$92.61M	$57.10M
YoY Change	-211.26%	-135.58%
Cash From Investing Activities	$92.09M	$56.28M
YoY Change	-209.96%	-134.78%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-112.3M	-129.4M
YoY Change	-528.61%	-211.77%
NET CHANGE
Cash From Operating Activities	11.66M	3.268M
Cash From Investing Activities	92.09M	56.28M
Cash From Financing Activities	-112.3M	-129.4M
Net Change In Cash	-8.580M	-69.83M
YoY Change	-78.32%	176.18%
FREE CASH FLOW
Cash From Operating Activities	$11.66M	$3.268M
Capital Expenditures	$520.0K	$822.0K
Free Cash Flow	$11.14M	$2.446M
YoY Change	-39.75%	-88.94%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023Q2	us-gaap	Debt Securities Held To Maturity Accrued Interest After Allowance For Credit Loss Statement Of Financial Position Extensible List DebtSecuritiesHeldToMaturityAccruedInterestAfterAllowanceForCreditLossStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#AccruedInvestmentIncomeReceivable
CY2022Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	802257000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	952173000	usd
CY2023Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10316000	usd
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10760000	usd
CY2023Q2	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	0	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	0	usd
CY2023Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	10979000	usd
CY2022Q2	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	0	usd
CY2022Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.13
CY2022Q2	us-gaap	Dividends Common Stock DividendsCommonStock	6130000	usd
CY2022Q2	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	12.96
CY2022Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2742000	usd
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	715273000	usd
CY2023Q1	us-gaap	Stockholders Equity StockholdersEquity	698166000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	9559000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2789000	usd
CY2023Q2	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	297000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	505000	usd
CY2023Q2	us-gaap	Restricted Stock Award Forfeitures RestrictedStockAwardForfeitures	0	usd
CY2023Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2023Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.13
CY2023Q2	us-gaap	Dividends Common Stock DividendsCommonStock	5786000	usd
CY2023Q2	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	10.48
CY2023Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	13311000	usd
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	686641000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	739883000	usd
	us-gaap	Net Income Loss NetIncomeLoss	30001000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-33329000	usd
	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	852000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	845000	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
	us-gaap	Restricted Stock Award Forfeitures RestrictedStockAwardForfeitures	0	usd
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	231000	usd
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.13
	us-gaap	Dividends Common Stock DividendsCommonStock	12231000	usd
	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	14.84
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	715273000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	701390000	usd
	us-gaap	Net Income Loss NetIncomeLoss	21266000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3257000	usd
	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	690000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1223000	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
	us-gaap	Restricted Stock Award Forfeitures RestrictedStockAwardForfeitures	0	usd
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	100000	usd
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.13
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
	us-gaap	Dividends Common Stock DividendsCommonStock	11698000	usd
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	70000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	41464000	usd
	nfbk	Proceeds From Sale Of Equity Securities ProceedsFromSaleOfEquitySecurities	0	usd
	nfbk	Proceeds From Sale Of Equity Securities ProceedsFromSaleOfEquitySecurities	31000	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1526000	usd
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	63000	usd
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	125000	usd
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1561000	usd
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1686000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	106512000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-237636000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-385816000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	248668000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	11698000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	12231000	usd
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	100000	usd
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	231000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	29587000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	10979000	usd
	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	3122000	usd
	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	4549000	usd
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	usd
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	60917000	usd
	nfbk	Proceeds From Fhlb Advances And Other Borrowings And Securities Sold Under Agreements To Repurchase ProceedsFromFHLBAdvancesAndOtherBorrowingsAndSecuritiesSoldUnderAgreementsToRepurchase	692788000	usd
	nfbk	Proceeds From Fhlb Advances And Other Borrowings And Securities Sold Under Agreements To Repurchase ProceedsFromFHLBAdvancesAndOtherBorrowingsAndSecuritiesSoldUnderAgreementsToRepurchase	261000	usd
	nfbk	Payments For Securities Sold Under Agreements To Repurchase PaymentsForSecuritiesSoldUnderAgreementsToRepurchase	353112000	usd
	nfbk	Payments For Securities Sold Under Agreements To Repurchase PaymentsForSecuritiesSoldUnderAgreementsToRepurchase	75000000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-84203000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	216416000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	43328000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	19164000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	45799000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	91068000	usd
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	89127000	usd
	us-gaap	Interest Paid Net InterestPaidNet	33942000	usd
	us-gaap	Interest Paid Net InterestPaidNet	6807000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	10156000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	11205000	usd
	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	2357000	usd
	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	494000	usd
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0	usd
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	63000	usd
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4983000	usd
	us-gaap	Financing Receivable Reclassification To Held For Sale FinancingReceivableReclassificationToHeldForSale	0	usd
	us-gaap	Financing Receivable Reclassification To Held For Sale FinancingReceivableReclassificationToHeldForSale	2346000	usd
CY2023Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	865167000	usd
CY2023Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	usd
CY2023Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	62910000	usd
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	802257000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1019607000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	952173000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	643100000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	591700000	usd
CY2023Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	21000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	39000	usd
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	22000	usd
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	39000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	usd
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	264000	usd
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	usd
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	us-gaap	Debt Securities Trading Realized Gain Loss DebtSecuritiesTradingRealizedGainLoss	1000000	usd
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CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	11299000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	61906000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	790936000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	62910000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	802235000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	21199000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	430053000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	46238000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	504194000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	67437000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	934247000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	2500000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	2800000	usd
CY2023Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10316000	usd
CY2023Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	83000	usd
CY2023Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	453000	usd
CY2023Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	9946000	usd
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10760000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	90000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	461000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	10389000	usd
	us-gaap	Debt Securities Held To Maturity Sold Amount DebtSecuritiesHeldToMaturitySoldAmount	0	usd
	us-gaap	Debt Securities Held To Maturity Sold Amount DebtSecuritiesHeldToMaturitySoldAmount	0	usd
CY2023Q2	us-gaap	Held To Maturity Securities Restricted HeldToMaturitySecuritiesRestricted	10300000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Restricted HeldToMaturitySecuritiesRestricted	2000000	usd
CY2023Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	86000	usd
CY2023Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	3253000	usd
CY2023Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	367000	usd
CY2023Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	3768000	usd
CY2023Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	453000	usd
CY2023Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	7021000	usd
CY2023Q2	nfbk	Debt Securities Held To Maturity Unrealized Loss Position Greater Than Twelve Months Number Of Positions DebtSecuritiesHeldToMaturityUnrealizedLossPositionGreaterThanTwelveMonthsNumberOfPositions	6	security
CY2023Q2	nfbk	Debt Securities Held To Maturity Unrealized Loss Position Less Than Twelve Months Number Of Positions DebtSecuritiesHeldToMaturityUnrealizedLossPositionLessThanTwelveMonthsNumberOfPositions	3	security
CY2023Q2	us-gaap	Debt Securities Held To Maturity Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAccruedInterestAfterAllowanceForCreditLoss	37000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAccruedInterestAfterAllowanceForCreditLoss	39000	usd
CY2023Q2	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	10700000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	10400000	usd
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4274042000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4243693000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	41154000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	42617000	usd
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	4232888000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	4201076000	usd
CY2023Q2	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	977000	usd
CY2022Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	0	usd
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual FinancingReceivableExcludingAccruedInterestNonaccrual	10100000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual FinancingReceivableExcludingAccruedInterestNonaccrual	9800000	usd
	nfbk	Delinquent Status Classification Criteria Days Minimum DelinquentStatusClassificationCriteriaDaysMinimum	P90D
	nfbk	Delinquent Status Classification Criteria Days Minimum DelinquentStatusClassificationCriteriaDaysMinimum	P90D
CY2023Q2	nfbk	Principal Balance Threshold For Non Accrual Status PrincipalBalanceThresholdForNonAccrualStatus	500000	usd
CY2023Q2	nfbk	Loans Deemed To Be Impaired Non Accrual Amount LoansDeemedToBeImpairedNonAccrualAmount	5100000	usd
CY2022Q4	nfbk	Loans Deemed To Be Impaired Non Accrual Amount LoansDeemedToBeImpairedNonAccrualAmount	5200000	usd
CY2023Q2	nfbk	Principal Balance Threshold For Non Accrual Status PrincipalBalanceThresholdForNonAccrualStatus	500000	usd
CY2023Q2	nfbk	Loans On Non Accrual Status With Principal Balances Below Threshold Definition Of Impaired Loan LoansOnNonAccrualStatusWithPrincipalBalancesBelowThresholdDefinitionOfImpairedLoan	5000000	usd
CY2022Q4	nfbk	Loans On Non Accrual Status With Principal Balances Below Threshold Definition Of Impaired Loan LoansOnNonAccrualStatusWithPrincipalBalancesBelowThresholdDefinitionOfImpairedLoan	4600000	usd
	nfbk	Delinquent Status Classification Criteria Days Minimum DelinquentStatusClassificationCriteriaDaysMinimum	P90D
CY2022	nfbk	Delinquent Status Classification Criteria Days Minimum DelinquentStatusClassificationCriteriaDaysMinimum	P90D
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest90 Days Or More Past Due Still Accruing FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing	224000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest90 Days Or More Past Due Still Accruing FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing	425000	usd
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual FinancingReceivableExcludingAccruedInterestNonaccrual	10110000	usd
CY2023Q2	nfbk	Financing Receivable Excluding Accrued Interest Nonaccrual Unpaid Principal Balance FinancingReceivableExcludingAccruedInterestNonaccrualUnpaidPrincipalBalance	12336000	usd
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual No Allowance FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance	5142000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual FinancingReceivableExcludingAccruedInterestNonaccrual	9813000	usd
CY2022Q4	nfbk	Financing Receivable Excluding Accrued Interest Nonaccrual Unpaid Principal Balance FinancingReceivableExcludingAccruedInterestNonaccrualUnpaidPrincipalBalance	10851000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual No Allowance FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance	5186000	usd
CY2023Q2	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	160000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	119000	usd
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	258000	usd
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	159000	usd
CY2023Q2	nfbk	Financing Receivable Impaired Secured By Collateral FinancingReceivableImpairedSecuredByCollateral	7200000	usd
CY2022Q4	nfbk	Financing Receivable Impaired Secured By Collateral FinancingReceivableImpairedSecuredByCollateral	7400000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Modified Period FinancingReceivableExcludingAccruedInterestModifiedPeriod	600000	usd
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest Modified Period FinancingReceivableExcludingAccruedInterestModifiedPeriod	600000	usd
CY2023Q2	us-gaap	Financing Receivable Modification To Total Financing Receivables Excluding Accrued Interest Percent FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent	0.0006
	us-gaap	Financing Receivable Modification To Total Financing Receivables Excluding Accrued Interest Percent FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent	0.0006
CY2023Q2	us-gaap	Financing Receivable Modified Weighted Average Term Increase From Modification FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification	P32M
	us-gaap	Financing Receivable Modified Weighted Average Term Increase From Modification FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification	P32M
	us-gaap	Financing Receivable Modified Weighted Average Interest Rate Decrease From Modification FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification	-0.0465
CY2023Q2	us-gaap	Financing Receivable Modified Weighted Average Interest Rate Decrease From Modification FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification	-0.0465
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest Modified Past12 Months FinancingReceivableExcludingAccruedInterestModifiedPast12Months	600000	usd
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	contract
CY2022Q2	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	contract
CY2022Q4	nfbk	Trouble Debt Restructuring Amount TroubleDebtRestructuringAmount	7000000	usd
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
CY2023Q2	nfbk	Financing Receivable Threshold Individually Evaluated For Impairment FinancingReceivableThresholdIndividuallyEvaluatedForImpairment	500000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	44900	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	38200	usd
CY2023Q1	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	902000	usd
CY2022Q1	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	2131000	usd
CY2022Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	791000	usd
CY2021Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	1852000	usd
CY2023Q2	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-661000	usd
CY2022Q2	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	349000	usd
	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-550000	usd
	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	628000	usd
CY2023Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	241000	usd
CY2022Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	2480000	usd
CY2023Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	241000	usd
CY2022Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	2480000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	41436000	usd
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	355000	usd
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	43000	usd
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	39274000	usd
CY2022Q2	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	525000	usd
CY2022Q2	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	133000	usd
CY2022Q2	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	149000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	39031000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	740022000	usd
CY2023Q2	us-gaap	Deposits Deposits	3764403000	usd
CY2022Q4	us-gaap	Deposits Deposits	4150219000	usd
CY2023Q2	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	6486000	usd
CY2022Q2	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	599000	usd
	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	10329000	usd
	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	1170000	usd
CY2023Q2	us-gaap	Interest Expense Domestic Deposit Liabilities Certificates Of Deposit InterestExpenseDomesticDepositLiabilitiesCertificatesOfDeposit	3997000	usd
CY2022Q2	us-gaap	Interest Expense Domestic Deposit Liabilities Certificates Of Deposit InterestExpenseDomesticDepositLiabilitiesCertificatesOfDeposit	735000	usd
	us-gaap	Interest Expense Domestic Deposit Liabilities Certificates Of Deposit InterestExpenseDomesticDepositLiabilitiesCertificatesOfDeposit	7975000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	42617000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	2419000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	62000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	894000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	38973000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	710000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	216000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	552000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	45000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	37383000	usd
CY2023Q2	nfbk	Financing Receivable Allowance For Credit Losses Pcd Loans Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesPCDLoansEvaluatedForImpairment	3726000	usd
CY2023Q2	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4274042000	usd
CY2023Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	8666000	usd
CY2023Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4253462000	usd
CY2023Q2	nfbk	Financing Receivables Pcd Loans Evaluated For Impairment FinancingReceivablesPCDLoansEvaluatedForImpairment	11548000	usd
CY2023Q2	nfbk	Financing Receivable Not Evaluated For Impairment FinancingReceivableNotEvaluatedForImpairment	366000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	38000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	38696000	usd
CY2022Q4	nfbk	Financing Receivable Allowance For Credit Losses Pcd Loans Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesPCDLoansEvaluatedForImpairment	3883000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4243693000	usd
CY2022Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	8939000	usd
CY2022Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4218109000	usd
CY2022Q4	nfbk	Financing Receivables Pcd Loans Evaluated For Impairment FinancingReceivablesPCDLoansEvaluatedForImpairment	11502000	usd
CY2022Q4	nfbk	Financing Receivable Not Evaluated For Impairment FinancingReceivableNotEvaluatedForImpairment	5143000	usd
CY2023Q2	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	754498000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	852660000	usd
CY2023Q2	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	1116000000	usd
CY2022Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	1132290000	usd
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1425247000	usd
CY2023Q2	us-gaap	Time Deposits TimeDeposits	654232000	usd
	us-gaap	Interest Expense Domestic Deposit Liabilities Certificates Of Deposit InterestExpenseDomesticDepositLiabilitiesCertificatesOfDeposit	1323000	usd
CY2023Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	10483000	usd
CY2022Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1334000	usd
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	15.27
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	35157	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	14.33
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	364360	shares
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	14.36
CY2023Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	507000	usd
CY2022Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	449000	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1200000	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	845000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	18304000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2493000	usd
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1582826	shares
CY2022Q4	nfbk	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue	4.03
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	14.04
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y3D
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	10900	shares
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue	3.98
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	13.80
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	7600	shares
	nfbk	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageGrantDateFairValue	3.91
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	13.13
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1564326	shares
CY2023Q2	nfbk	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue	4.03
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	14.05
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P1Y6M3D
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	1564326	shares
CY2023Q2	nfbk	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageGrantDateFairValue	4.03
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	14.05
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y6M3D
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	321501	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	14.66
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	192249	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	14.37
	nfbk	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Incremental ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncremental	10353	shares
	nfbk	Share Based Compensation Arrangement By Share Based Payment Award Equity Instrument Other Than Options Incremental Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsIncrementalWeightedAverageGrantDateFairValue	0
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	124586	shares
CY2023Q2	nfbk	Investment Owned At Net Asset Value InvestmentOwnedAtNetAssetValue	10000000	usd
CY2022Q4	nfbk	Investment Owned At Net Asset Value InvestmentOwnedAtNetAssetValue	10100000	usd
CY2023Q2	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	4466000	usd
CY2022Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	4640000	usd
CY2023Q2	nfbk	Principal Amount Outstanding Of Impaired Loans Heldfor Investment Heldfor Sale PrincipalAmountOutstandingOfImpairedLoansHeldforInvestmentHeldforSale	6200000	usd
CY2022Q4	nfbk	Principal Amount Outstanding Of Impaired Loans Heldfor Investment Heldfor Sale PrincipalAmountOutstandingOfImpairedLoansHeldforInvestmentHeldforSale	6700000	usd
CY2023Q2	nfbk	Estimated Fair Value Of Impaired Loans Held For Investment EstimatedFairValueOfImpairedLoansHeldForInvestment	4500000	usd
CY2022Q4	nfbk	Estimated Fair Value Of Impaired Loans Held For Investment EstimatedFairValueOfImpairedLoansHeldForInvestment	4600000	usd
	nfbk	Impaired Financing Receivable Reserve Increase Decrease ImpairedFinancingReceivableReserveIncreaseDecrease	7000	usd
	nfbk	Impaired Financing Receivable Reserve Increase Decrease ImpairedFinancingReceivableReserveIncreaseDecrease	6000	usd
	nfbk	Impaired Financing Receivables Charge Off ImpairedFinancingReceivablesChargeOff	2400000	usd
	nfbk	Impaired Financing Receivables Charge Off ImpairedFinancingReceivablesChargeOff	494000	usd
CY2022Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	0	usd
CY2023Q2	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	0	usd
CY2022Q4	nfbk	Investment Owned At Net Asset Value InvestmentOwnedAtNetAssetValue	10100000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	9559000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	15874000	usd
	us-gaap	Net Income Loss NetIncomeLoss	21266000	usd
	us-gaap	Net Income Loss NetIncomeLoss	30001000	usd
CY2023Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	43914110	shares
CY2022Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46591723	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	44346881	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46708716	shares
CY2023Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	38829	shares
CY2022Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	46390	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	91752	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	161717	shares
CY2023Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	43952939	shares
CY2022Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46638113	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	44438633	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46870433	shares
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.48
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.64
CY2023Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.34
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.64
CY2023Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1849258	shares
CY2022Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1922988	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1384805	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1098229	shares
CY2023Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	32000000	usd
CY2023Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	37300000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	34300000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	39800000	usd
CY2023Q2	us-gaap	Operating Lease Cost OperatingLeaseCost	1504000	usd
CY2022Q2	us-gaap	Operating Lease Cost OperatingLeaseCost	1521000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	3011000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	2990000	usd
CY2023Q2	us-gaap	Variable Lease Cost VariableLeaseCost	936000	usd
CY2022Q2	us-gaap	Variable Lease Cost VariableLeaseCost	863000	usd
	us-gaap	Variable Lease Cost VariableLeaseCost	1842000	usd
	us-gaap	Variable Lease Cost VariableLeaseCost	1828000	usd
CY2023Q2	us-gaap	Lease Cost LeaseCost	2440000	usd
CY2022Q2	us-gaap	Lease Cost LeaseCost	2384000	usd
	us-gaap	Lease Cost LeaseCost	4853000	usd
	us-gaap	Lease Cost LeaseCost	4818000	usd
CY2023Q2	us-gaap	Operating Lease Payments OperatingLeasePayments	1615000	usd
CY2022Q2	us-gaap	Operating Lease Payments OperatingLeasePayments	1597000	usd
	us-gaap	Operating Lease Payments OperatingLeasePayments	3221000	usd
	us-gaap	Operating Lease Payments OperatingLeasePayments	3161000	usd
CY2023Q2	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
CY2022Q2	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4983000	usd
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	63000	usd
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4983000	usd
CY2023Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P11Y1M20D
CY2022Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P11Y4M13D
CY2023Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0356
CY2022Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0352
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	3263000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	6059000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	5718000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4955000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3995000	usd
CY2023Q2	nfbk	Lessee Operating Lease Liability Payments Due After Year Four LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour	22705000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	46695000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	9421000	usd
CY2023Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	37274000	usd
CY2023Q2	us-gaap	Lessee Operating Lease Lease Not Yet Commenced Term Of Contract1 LesseeOperatingLeaseLeaseNotYetCommencedTermOfContract1	P10Y
CY2023Q2	nfbk	Lessee Operating Lease Lease Not Yet Commenced Liability LesseeOperatingLeaseLeaseNotYetCommencedLiability	850000	usd
CY2023Q2	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q2	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q2	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2023Q2	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false

Files In Submission

Name	View Source	Status
FilingSummary.xml	Edgar Link	unprocessable
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0001493225-23-000099-index.html	Edgar Link	pending
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ex311-2023x6x30.htm	Edgar Link	pending
ex312-2023x6x30.htm	Edgar Link	pending
ex32-2023x6x30.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
nfbk-20230630.htm	Edgar Link	pending
nfbk-20230630.xsd	Edgar Link	pending
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nfbk-20230630_cal.xml	Edgar Link	unprocessable
nfbk-20230630_pre.xml	Edgar Link	unprocessable
nfbk-20230630_htm.xml	Edgar Link	completed
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R50.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
nfbk-20230630_def.xml	Edgar Link	unprocessable
nfbk-20230630_lab.xml	Edgar Link	unprocessable

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$NFBK
Northfield Bancorp, Inc. Stock $nfbk

2023 Q3 Form 10-Q Financial Statement

#000149322523000099 Filed on August 09, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NFBK Northfield Bancorp, Inc. Stock $nfbk

2023 Q3 Form 10-Q Financial Statement

#000149322523000099 Filed on August 09, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NFBK
Northfield Bancorp, Inc. Stock $nfbk