$NFBK
Northfield Bancorp, Inc. Stock $nfbk

$nfbk Overview Financials Valuation SEC Filings Company Website

2023 Q2 Form 10-Q Financial Statement

#000149322523000079 Filed on May 10, 2023

Income Statement

Concept	2023 Q2	2023 Q1
Revenue	$1.309M	$1.380M
YoY Change	-96.99%	-96.57%
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	$954.0K	$940.0K
YoY Change	0.32%	-5.91%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$20.51M	$15.03M
YoY Change	508.4%	352.06%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$13.17M	$16.24M
YoY Change	-40.09%	-16.61%
Income Tax	$3.613M	$4.529M
% Of Pretax Income	27.43%	27.89%
Net Earnings	$9.559M	$11.71M
YoY Change	-39.78%	-17.13%
Net Earnings / Revenue	730.25%	848.33%
Basic Earnings Per Share	$0.22	$0.26
Diluted Earnings Per Share	$0.22	$0.26
COMMON SHARES
Basic Shares Outstanding	46.53M shares	46.85M shares
Diluted Shares Outstanding	43.95M shares	44.93M shares

Balance Sheet

Concept	2023 Q2	2023 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$89.13M	$159.0M
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	$24.57M	$24.67M
YoY Change	-4.63%	-2.69%
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	$5.541B	$5.663B
YoY Change	-1.88%	2.66%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$29.12M	$30.85M
YoY Change	-1.16%	2.71%
Accrued Expenses	$76.01M	$76.63M
YoY Change	-0.62%	9.29%
Deferred Revenue
YoY Change
Short-Term Debt	$25.00M	$25.00M
YoY Change	0.0%	-50.0%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$130.1M	$132.5M
YoY Change	22.83%	32.28%
LONG-TERM LIABILITIES
Long-Term Debt	$959.6M	$985.0M
YoY Change	150.6%	183.16%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$959.6M	$985.0M
YoY Change	150.6%	183.16%
TOTAL LIABILITIES
Total Short-Term Liabilities	$130.1M	$132.5M
Total Long-Term Liabilities	$959.6M	$985.0M
Total Liabilities	$4.854B	$4.965B
YoY Change	-1.58%	3.42%
SHAREHOLDERS EQUITY
Retained Earnings	$427.9M	$424.1M
YoY Change	7.21%	8.93%
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	$686.6M	$698.2M
YoY Change
Total Liabilities & Shareholders Equity	$5.541B	$5.663B
YoY Change	-1.88%	2.66%

Cashflow Statement

Concept	2023 Q2	2023 Q1
OPERATING ACTIVITIES
Net Income	$9.559M	$11.71M
YoY Change	-39.78%	-17.13%
Depreciation, Depletion And Amortization	$954.0K	$940.0K
YoY Change	0.32%	-5.91%
Cash From Operating Activities	$3.268M	$17.75M
YoY Change	-84.28%	-9.42%
INVESTING ACTIVITIES
Capital Expenditures	$822.0K	$739.0K
YoY Change	-162.23%	102.47%
Acquisitions
YoY Change
Other Investing Activities	$57.10M	$50.98M
YoY Change	-135.58%	-167.56%
Cash From Investing Activities	$56.28M	$50.24M
YoY Change	-134.78%	-166.26%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-129.4M	$45.17M
YoY Change	-211.77%	-55.13%
NET CHANGE
Cash From Operating Activities	3.268M	$17.75M
Cash From Investing Activities	56.28M	$50.24M
Cash From Financing Activities	-129.4M	$45.17M
Net Change In Cash	-69.83M	$113.2M
YoY Change	176.18%	154.59%
FREE CASH FLOW
Cash From Operating Activities	$3.268M	$17.75M
Capital Expenditures	$822.0K	$739.0K
Free Cash Flow	$2.446M	$17.01M
YoY Change	-88.94%	-11.55%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023Q1	dei	Entity Central Index Key EntityCentralIndexKey	0001493225
CY2023Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	42617000	usd
CY2023Q1	dei	Amendment Flag AmendmentFlag	false
CY2023Q1	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
CY2023Q1	dei	Document Type DocumentType	10-Q
CY2023Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2023Q1	dei	Document Period End Date DocumentPeriodEndDate	2023-03-31
CY2023Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2023Q1	dei	Entity File Number EntityFileNumber	001-35791
CY2023Q1	dei	Entity Registrant Name EntityRegistrantName	Northfield Bancorp, Inc.
CY2023Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	80-0882592
CY2023Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	581 Main Street,
CY2023Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	Woodbridge,
CY2023Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	NJ
CY2023Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	07095
CY2023Q1	dei	City Area Code CityAreaCode	732
CY2023Q1	dei	Local Phone Number LocalPhoneNumber	499-7200
CY2023Q1	dei	Security12b Title Security12bTitle	Common stock, par value $0.01 per share
CY2023Q1	dei	Trading Symbol TradingSymbol	NFBK
CY2023Q1	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2023Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023Q1	dei	Entity Small Business EntitySmallBusiness	false
CY2023Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023Q1	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	46530167	shares
CY2023Q1	us-gaap	Cash And Due From Banks CashAndDueFromBanks	14490000	usd
CY2022Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	14530000	usd
CY2023Q1	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	144462000	usd
CY2022Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	31269000	usd
CY2023Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	158952000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	45799000	usd
CY2023Q1	us-gaap	Trading Securities Debt TradingSecuritiesDebt	11129000	usd
CY2022Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	10751000	usd
CY2023Q1	us-gaap	Notes Receivable Net NotesReceivableNet	4200495000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	896948000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	952173000	usd
CY2023Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10378000	usd
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10760000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	10172000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	10389000	usd
CY2023Q1	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
CY2023Q1	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	10443000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	10443000	usd
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4241931000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4243693000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	41436000	usd
CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4201076000	usd
CY2023Q1	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	17196000	usd
CY2022Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	17426000	usd
CY2023Q1	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	168782000	usd
CY2022Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	167912000	usd
CY2023Q1	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	41117000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	30382000	usd
CY2023Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	33120000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	34288000	usd
CY2023Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24674000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24844000	usd
CY2023Q1	us-gaap	Goodwill Goodwill	41012000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	41012000	usd
CY2023Q1	us-gaap	Other Assets OtherAssets	48927000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	54427000	usd
CY2023Q1	us-gaap	Assets Assets	5663173000	usd
CY2022Q4	us-gaap	Assets Assets	5601293000	usd
CY2023Q1	us-gaap	Deposits Deposits	3847497000	usd
CY2022Q4	us-gaap	Deposits Deposits	4150219000	usd
CY2023Q1	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	25000000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	25000000	usd
CY2023Q1	us-gaap	Other Borrowings OtherBorrowings	923983000	usd
CY2022Q4	us-gaap	Other Borrowings OtherBorrowings	558859000	usd
CY2023Q1	us-gaap	Subordinated Debt SubordinatedDebt	61052000	usd
CY2022Q4	us-gaap	Subordinated Debt SubordinatedDebt	60996000	usd
CY2023Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	38509000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	39790000	usd
CY2023Q1	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	30847000	usd
CY2022Q4	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	25995000	usd
CY2023Q1	us-gaap	Accounts Payable And Other Accrued Liabilities AccountsPayableAndOtherAccruedLiabilities	38119000	usd
CY2022Q4	us-gaap	Accounts Payable And Other Accrued Liabilities AccountsPayableAndOtherAccruedLiabilities	39044000	usd
CY2023Q1	us-gaap	Liabilities Liabilities	4965007000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	4899903000	usd
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2023Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2023Q1	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2023Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2023Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	64770875	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	64770875	shares
CY2023Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	46530167	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	47442488	shares
CY2023Q1	us-gaap	Common Stock Value CommonStockValue	648000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	648000	usd
CY2023Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	588532000	usd
CY2022Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	590249000	usd
CY2023Q1	us-gaap	Employee Stock Ownership Plan Esop Deferred Shares EmployeeStockOwnershipPlanESOPDeferredShares	15422000	usd
CY2022Q4	us-gaap	Employee Stock Ownership Plan Esop Deferred Shares EmployeeStockOwnershipPlanESOPDeferredShares	15650000	usd
CY2023Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	424148000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	418353000	usd
CY2023Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-42285000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-48331000	usd
CY2023Q1	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	18240708	shares
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	17328387	shares
CY2023Q1	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	257455000	usd
CY2022Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	243879000	usd
CY2023Q1	us-gaap	Stockholders Equity StockholdersEquity	698166000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	701390000	usd
CY2023Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5663173000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5601293000	usd
CY2023Q1	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	43707000	usd
CY2022Q1	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	36721000	usd
CY2023Q1	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	3792000	usd
CY2022Q1	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	2475000	usd
CY2023Q1	us-gaap	Interest Income Securities Corporate Debt Operating InterestIncomeSecuritiesCorporateDebtOperating	1385000	usd
CY2022Q1	us-gaap	Interest Income Securities Corporate Debt Operating InterestIncomeSecuritiesCorporateDebtOperating	695000	usd
CY2023Q1	us-gaap	Interest Income Federal Home Loan Bank Advances InterestIncomeFederalHomeLoanBankAdvances	465000	usd
CY2022Q1	us-gaap	Interest Income Federal Home Loan Bank Advances InterestIncomeFederalHomeLoanBankAdvances	245000	usd
CY2023Q1	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	578000	usd
CY2022Q1	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	58000	usd
CY2023Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	49927000	usd
CY2022Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	40194000	usd
CY2023Q1	us-gaap	Interest Expense Deposits InterestExpenseDeposits	7821000	usd
CY2022Q1	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1159000	usd
CY2023Q1	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	6391000	usd
CY2022Q1	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	2166000	usd
CY2023Q1	nfbk	Interest Expense Subordinated Debt InterestExpenseSubordinatedDebt	819000	usd
CY2022Q1	nfbk	Interest Expense Subordinated Debt InterestExpenseSubordinatedDebt	0	usd
CY2023Q1	us-gaap	Interest Expense InterestExpense	15031000	usd
CY2022Q1	us-gaap	Interest Expense InterestExpense	3325000	usd
CY2023Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	34896000	usd
CY2022Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	36869000	usd
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	864000	usd
CY2022Q1	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	403000	usd
CY2023Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	34032000	usd
CY2022Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	36466000	usd
CY2023Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1380000	usd
CY2022Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1331000	usd
CY2023Q1	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	870000	usd
CY2022Q1	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	839000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	1000	usd
CY2022Q1	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	264000	usd
CY2023Q1	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	512000	usd
CY2022Q1	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-802000	usd
CY2023Q1	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	569000	usd
CY2022Q1	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	81000	usd
CY2023Q1	us-gaap	Noninterest Income NoninterestIncome	3332000	usd
CY2022Q1	us-gaap	Noninterest Income NoninterestIncome	1713000	usd
CY2023Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	11037000	usd
CY2022Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	9507000	usd
CY2023Q1	us-gaap	Occupancy Net OccupancyNet	3372000	usd
CY2022Q1	us-gaap	Occupancy Net OccupancyNet	3408000	usd
CY2023Q1	us-gaap	Equipment Expense EquipmentExpense	454000	usd
CY2022Q1	us-gaap	Equipment Expense EquipmentExpense	426000	usd
CY2023Q1	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2243000	usd
CY2022Q1	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1713000	usd
CY2023Q1	us-gaap	Professional Fees ProfessionalFees	971000	usd
CY2022Q1	us-gaap	Professional Fees ProfessionalFees	908000	usd
CY2023Q1	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	847000	usd
CY2022Q1	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	433000	usd
CY2023Q1	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	604000	usd
CY2022Q1	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	357000	usd
CY2023Q1	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	111000	usd
CY2022Q1	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	279000	usd
CY2023Q1	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1489000	usd
CY2022Q1	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1678000	usd
CY2023Q1	us-gaap	Noninterest Expense NoninterestExpense	21128000	usd
CY2022Q1	us-gaap	Noninterest Expense NoninterestExpense	18709000	usd
CY2023Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	16236000	usd
CY2022Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	19470000	usd
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4529000	usd
CY2022Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5343000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	11707000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	14127000	usd
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.26
CY2022Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
CY2022Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	11707000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	14127000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	8397000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-34894000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	264000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	8396000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-35158000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	0	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	48000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	8396000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-35206000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	2350000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-9767000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	74000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	0	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	13000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6046000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-25352000	usd
CY2023Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	17753000	usd
CY2022Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-11225000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	739883000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	14127000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-25352000	usd
CY2022Q1	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	451000	usd
CY2022Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	396000	usd
CY2022Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
CY2022Q1	us-gaap	Restricted Stock Award Forfeitures RestrictedStockAwardForfeitures	0	usd
CY2022Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	231000	usd
CY2022Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2022Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.13
CY2022Q1	us-gaap	Dividends Common Stock DividendsCommonStock	6101000	usd
CY2022Q1	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	15.60
CY2022Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	8237000	usd
CY2022Q1	us-gaap	Stockholders Equity StockholdersEquity	715398000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	701390000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	11707000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6046000	usd
CY2023Q1	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	393000	usd
CY2023Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	718000	usd
CY2023Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
CY2023Q1	us-gaap	Restricted Stock Award Forfeitures RestrictedStockAwardForfeitures	0	usd
CY2023Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	100000	usd
CY2023Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.13
CY2023Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.13
CY2023Q1	us-gaap	Dividends Common Stock DividendsCommonStock	5912000	usd
CY2023Q1	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	14.68
CY2023Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	16276000	usd
CY2023Q1	us-gaap	Stockholders Equity StockholdersEquity	698166000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	11707000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	14127000	usd
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	864000	usd
CY2022Q1	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	403000	usd
CY2023Q1	us-gaap	Share Based Compensation ShareBasedCompensation	1111000	usd
CY2022Q1	us-gaap	Share Based Compensation ShareBasedCompensation	847000	usd
CY2023Q1	us-gaap	Depreciation Nonproduction DepreciationNonproduction	909000	usd
CY2022Q1	us-gaap	Depreciation Nonproduction DepreciationNonproduction	946000	usd
CY2023Q1	nfbk	Amortization Of Premiums And Deferred Loan Costs AmortizationOfPremiumsAndDeferredLoanCosts	1940000	usd
CY2022Q1	nfbk	Amortization Of Premiums And Deferred Loan Costs AmortizationOfPremiumsAndDeferredLoanCosts	2608000	usd
CY2023Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	56000	usd
CY2022Q1	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	0	usd
CY2023Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	31000	usd
CY2022Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	53000	usd
CY2023Q1	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	1168000	usd
CY2022Q1	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	1130000	usd
CY2023Q1	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	870000	usd
CY2022Q1	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	839000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	1000	usd
CY2022Q1	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	264000	usd
CY2023Q1	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	512000	usd
CY2022Q1	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-802000	usd
CY2023Q1	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-134000	usd
CY2022Q1	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-503000	usd
CY2023Q1	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-230000	usd
CY2022Q1	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	19000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1909000	usd
CY2022Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2604000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-925000	usd
CY2022Q1	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-3303000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	17751000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	19598000	usd
CY2023Q1	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-3058000	usd
CY2022Q1	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	91853000	usd
CY2023Q1	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	3781000	usd
CY2022Q1	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	0	usd
CY2023Q1	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	21198000	usd
CY2022Q1	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	0	usd
CY2023Q1	nfbk	Redemptions Of Federal Home Loan Bank Stock RedemptionsOfFederalHomeLoanBankStock	10463000	usd
CY2022Q1	nfbk	Redemptions Of Federal Home Loan Bank Stock RedemptionsOfFederalHomeLoanBankStock	1125000	usd
CY2023Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	0	usd
CY2022Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	138982000	usd
CY2023Q1	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	usd
CY2022Q1	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	2541000	usd
CY2023Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	62063000	usd
CY2022Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	113767000	usd
CY2023Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	370000	usd
CY2022Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	37000	usd
CY2023Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2022Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	41464000	usd
CY2023Q1	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
CY2022Q1	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1526000	usd
CY2023Q1	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	739000	usd
CY2022Q1	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	365000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	50236000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-75822000	usd
CY2023Q1	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-302722000	usd
CY2022Q1	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	133532000	usd
CY2023Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5912000	usd
CY2022Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6101000	usd
CY2023Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	100000	usd
CY2022Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	231000	usd
CY2023Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16276000	usd
CY2022Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	8237000	usd
CY2023Q1	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	4852000	usd
CY2022Q1	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	5123000	usd
CY2023Q1	nfbk	Proceeds From Fhlb Advances And Other Borrowings And Securities Sold Under Agreements To Repurchase ProceedsFromFHLBAdvancesAndOtherBorrowingsAndSecuritiesSoldUnderAgreementsToRepurchase	617788000	usd
CY2022Q1	nfbk	Proceeds From Fhlb Advances And Other Borrowings And Securities Sold Under Agreements To Repurchase ProceedsFromFHLBAdvancesAndOtherBorrowingsAndSecuritiesSoldUnderAgreementsToRepurchase	1122000	usd
CY2023Q1	nfbk	Payments For Securities Sold Under Agreements To Repurchase PaymentsForSecuritiesSoldUnderAgreementsToRepurchase	252664000	usd
CY2022Q1	nfbk	Payments For Securities Sold Under Agreements To Repurchase PaymentsForSecuritiesSoldUnderAgreementsToRepurchase	25000000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	45166000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	100670000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	113153000	usd
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	44446000	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
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	158952000	usd
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	135514000	usd
CY2023Q1	us-gaap	Interest Paid Net InterestPaidNet	13527000	usd
CY2022Q1	us-gaap	Interest Paid Net InterestPaidNet	3418000	usd
CY2023Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	1391000	usd
CY2022Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	827000	usd
CY2023Q1	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	2045000	usd
CY2022Q1	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	102000	usd
CY2023Q1	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	70000	usd
CY2022Q1	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0	usd
CY2023Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	955986000	usd
CY2023Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	18000	usd
CY2023Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	59056000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	896948000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1019607000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	3000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	67437000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	952173000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	678000000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	591700000	usd
CY2023Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	1000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	usd
CY2022Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	41500000	usd
CY2022Q1	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	264000	usd
CY2022Q1	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	usd
CY2023Q1	us-gaap	Debt Securities Trading Realized Gain Loss DebtSecuritiesTradingRealizedGainLoss	512000	usd
CY2022Q1	us-gaap	Debt Securities Trading Realized Gain Loss DebtSecuritiesTradingRealizedGainLoss	802000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	4293000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	117354000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	54763000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	764472000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	59056000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	881826000	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
CY2022Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	2300000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	2800000	usd
CY2023Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10378000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	136000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	342000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	10172000	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
CY2023Q1	us-gaap	Debt Securities Held To Maturity Sold Amount DebtSecuritiesHeldToMaturitySoldAmount	0	usd
CY2022Q1	us-gaap	Debt Securities Held To Maturity Sold Amount DebtSecuritiesHeldToMaturitySoldAmount	0	usd
CY2023Q1	us-gaap	Held To Maturity Securities Restricted HeldToMaturitySecuritiesRestricted	10400000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Restricted HeldToMaturitySecuritiesRestricted	2000000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	83000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	4250000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	259000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2932000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	342000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	7182000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	461000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	7433000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	0	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	461000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	7433000	usd
CY2023Q1	nfbk	Debt Securities Held To Maturity Unrealized Loss Position Greater Than Twelve Months Number Of Positions DebtSecuritiesHeldToMaturityUnrealizedLossPositionGreaterThanTwelveMonthsNumberOfPositions	5	security
CY2023Q1	nfbk	Debt Securities Held To Maturity Unrealized Loss Position Less Than Twelve Months Number Of Positions DebtSecuritiesHeldToMaturityUnrealizedLossPositionLessThanTwelveMonthsNumberOfPositions	4	security
CY2023Q1	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
CY2023Q1	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	10400000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	10400000	usd
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4241931000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4243693000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	41436000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	42617000	usd
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	4200495000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	4201076000	usd
CY2022Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	0	usd
CY2023Q1	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	0	usd
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual FinancingReceivableExcludingAccruedInterestNonaccrual	9200000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual FinancingReceivableExcludingAccruedInterestNonaccrual	9800000	usd
CY2023Q1	nfbk	Delinquent Status Classification Criteria Days Minimum DelinquentStatusClassificationCriteriaDaysMinimum	P90D
CY2023Q1	nfbk	Delinquent Status Classification Criteria Days Minimum DelinquentStatusClassificationCriteriaDaysMinimum	P90D
CY2023Q1	nfbk	Principal Balance Threshold For Non Accrual Status PrincipalBalanceThresholdForNonAccrualStatus	500000	usd
CY2022Q4	nfbk	Loans Deemed To Be Impaired Non Accrual Amount LoansDeemedToBeImpairedNonAccrualAmount	5200000	usd
CY2023Q1	nfbk	Loans Deemed To Be Impaired Non Accrual Amount LoansDeemedToBeImpairedNonAccrualAmount	5200000	usd
CY2023Q1	nfbk	Principal Balance Threshold For Non Accrual Status PrincipalBalanceThresholdForNonAccrualStatus	500000	usd
CY2023Q1	nfbk	Loans On Non Accrual Status With Principal Balances Below Threshold Definition Of Impaired Loan LoansOnNonAccrualStatusWithPrincipalBalancesBelowThresholdDefinitionOfImpairedLoan	4000000	usd
CY2022Q4	nfbk	Loans On Non Accrual Status With Principal Balances Below Threshold Definition Of Impaired Loan LoansOnNonAccrualStatusWithPrincipalBalancesBelowThresholdDefinitionOfImpairedLoan	4600000	usd
CY2022	nfbk	Delinquent Status Classification Criteria Days Minimum DelinquentStatusClassificationCriteriaDaysMinimum	P90D
CY2023Q1	nfbk	Delinquent Status Classification Criteria Days Minimum DelinquentStatusClassificationCriteriaDaysMinimum	P90D
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest90 Days Or More Past Due Still Accruing FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing	231000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest90 Days Or More Past Due Still Accruing FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing	425000	usd
CY2023Q1	nfbk	Delinquent Status Classification Criteria Days Minimum DelinquentStatusClassificationCriteriaDaysMinimum	P90D
	nfbk	Delinquent Status Classification Criteria Days Minimum DelinquentStatusClassificationCriteriaDaysMinimum	P90D
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual FinancingReceivableExcludingAccruedInterestNonaccrual	9169000	usd
CY2023Q1	nfbk	Financing Receivable Excluding Accrued Interest Nonaccrual Unpaid Principal Balance FinancingReceivableExcludingAccruedInterestNonaccrualUnpaidPrincipalBalance	11399000	usd
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual No Allowance FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance	5165000	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
CY2023Q1	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	98000	usd
CY2022Q1	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	40000	usd
CY2023Q1	nfbk	Financing Receivable Impaired Secured By Collateral FinancingReceivableImpairedSecuredByCollateral	7300000	usd
CY2022Q4	nfbk	Financing Receivable Impaired Secured By Collateral FinancingReceivableImpairedSecuredByCollateral	7400000	usd
CY2022Q1	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	contract
CY2022Q4	nfbk	Trouble Debt Restructuring Amount TroubleDebtRestructuringAmount	7000000	usd
CY2022Q1	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
CY2023Q1	nfbk	Financing Receivable Threshold Individually Evaluated For Impairment FinancingReceivableThresholdIndividuallyEvaluatedForImpairment	500000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	45200	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	38200	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
CY2023Q1	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	111000	usd
CY2022Q1	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	279000	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	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	42617000	usd
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	2064000	usd
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	19000	usd
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	864000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	41436000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	38973000	usd
CY2022Q1	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	185000	usd
CY2022Q1	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	83000	usd
CY2022Q1	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	403000	usd
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	39274000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	45000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	37629000	usd
CY2023Q1	nfbk	Financing Receivable Allowance For Credit Losses Pcd Loans Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesPCDLoansEvaluatedForImpairment	3762000	usd
CY2023Q1	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	4241931000	usd
CY2023Q1	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	8803000	usd
CY2023Q1	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4216456000	usd
CY2023Q1	nfbk	Financing Receivables Pcd Loans Evaluated For Impairment FinancingReceivablesPCDLoansEvaluatedForImpairment	11591000	usd
CY2023Q1	nfbk	Financing Receivable Not Evaluated For Impairment FinancingReceivableNotEvaluatedForImpairment	5081000	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
CY2023Q1	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	804784000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	852660000	usd
CY2023Q1	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	1109364000	usd
CY2022Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	1132290000	usd
CY2023Q1	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1325271000	usd
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1425247000	usd
CY2023Q1	us-gaap	Time Deposits TimeDeposits	608078000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	740022000	usd
CY2023Q1	us-gaap	Deposits Deposits	3847497000	usd
CY2022Q4	us-gaap	Deposits Deposits	4150219000	usd
CY2023Q1	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	3843000	usd
CY2022Q1	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	571000	usd
CY2023Q1	us-gaap	Interest Expense Domestic Deposit Liabilities Certificates Of Deposit InterestExpenseDomesticDepositLiabilitiesCertificatesOfDeposit	3978000	usd
CY2022Q1	us-gaap	Interest Expense Domestic Deposit Liabilities Certificates Of Deposit InterestExpenseDomesticDepositLiabilitiesCertificatesOfDeposit	588000	usd
CY2023Q1	us-gaap	Interest Expense Deposits InterestExpenseDeposits	7821000	usd
CY2022Q1	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1159000	usd
CY2022Q2	us-gaap	Subordinated Debt SubordinatedDebt	62000000	usd
CY2023Q1	us-gaap	Subordinated Borrowing Interest Rate SubordinatedBorrowingInterestRate	0.0500
CY2022Q2	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1100000	usd
CY2023Q1	us-gaap	Accumulated Amortization Deferred Finance Costs AccumulatedAmortizationDeferredFinanceCosts	56000	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
CY2023Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	2500	shares
CY2023Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue	4.07
CY2023Q1	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	14.76
CY2023Q1	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	7600	shares
CY2023Q1	nfbk	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageGrantDateFairValue	3.91
CY2023Q1	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	13.13
CY2023Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1572726	shares
CY2023Q1	nfbk	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue	4.03
CY2023Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	14.04
CY2023Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P1Y9M3D
CY2023Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	1572726	shares
CY2023Q1	nfbk	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageGrantDateFairValue	4.03
CY2023Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	14.04
CY2023Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y9M3D
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
CY2023Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	192249	shares
CY2023Q1	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
CY2023Q1	nfbk	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Incremental ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncremental	10353	shares
CY2023Q1	nfbk	Share Based Compensation Arrangement By Share Based Payment Award Equity Instrument Other Than Options Incremental Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsIncrementalWeightedAverageGrantDateFairValue	0
CY2023Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	124586	shares
CY2023Q1	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
CY2023Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	5098	shares
CY2023Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	15.15
CY2023Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	394419	shares
CY2023Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	14.35
CY2023Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	718000	usd
CY2022Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	396000	usd
CY2023Q1	nfbk	Investment Owned At Net Asset Value InvestmentOwnedAtNetAssetValue	10000000	usd
CY2022Q4	nfbk	Investment Owned At Net Asset Value InvestmentOwnedAtNetAssetValue	10100000	usd
CY2023Q1	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	4540000	usd
CY2022Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	4640000	usd
CY2023Q1	nfbk	Other Real Estate Owned Fair Value Disclosure OtherRealEstateOwnedFairValueDisclosure	70000	usd
CY2022Q4	nfbk	Other Real Estate Owned Fair Value Disclosure OtherRealEstateOwnedFairValueDisclosure	0	usd
CY2023Q1	nfbk	Principal Amount Outstanding Of Impaired Loans Heldfor Investment Heldfor Sale PrincipalAmountOutstandingOfImpairedLoansHeldforInvestmentHeldforSale	6300000	usd
CY2022Q4	nfbk	Principal Amount Outstanding Of Impaired Loans Heldfor Investment Heldfor Sale PrincipalAmountOutstandingOfImpairedLoansHeldforInvestmentHeldforSale	6700000	usd
CY2023Q1	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
CY2023Q1	nfbk	Impaired Financing Receivable Reserve Increase Decrease ImpairedFinancingReceivableReserveIncreaseDecrease	7000	usd
CY2022Q1	nfbk	Impaired Financing Receivable Reserve Increase Decrease ImpairedFinancingReceivableReserveIncreaseDecrease	16000	usd
CY2023Q1	nfbk	Impaired Financing Receivables Charge Off ImpairedFinancingReceivablesChargeOff	2000000	usd
CY2022Q1	nfbk	Impaired Financing Receivables Charge Off ImpairedFinancingReceivablesChargeOff	102000	usd
CY2023Q1	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	70000	usd
CY2023Q1	nfbk	Investment Owned At Net Asset Value InvestmentOwnedAtNetAssetValue	10000000	usd
CY2022Q4	nfbk	Investment Owned At Net Asset Value InvestmentOwnedAtNetAssetValue	10100000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	11707000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	14127000	usd
CY2023Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	44784228	shares
CY2022Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46811331	shares
CY2023Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	144677	shares
CY2022Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	277044	shares
CY2023Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	44928905	shares
CY2022Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47088375	shares
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.26
CY2022Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
CY2022Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2023Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	920352	shares
CY2022Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	273469	shares
CY2023Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	33100000	usd
CY2023Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	38500000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	34300000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	39800000	usd
CY2023Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	1507000	usd
CY2022Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	1469000	usd
CY2023Q1	us-gaap	Variable Lease Cost VariableLeaseCost	906000	usd
CY2022Q1	us-gaap	Variable Lease Cost VariableLeaseCost	965000	usd
CY2023Q1	us-gaap	Lease Cost LeaseCost	2413000	usd
CY2022Q1	us-gaap	Lease Cost LeaseCost	2434000	usd
CY2023Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	1606000	usd
CY2022Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	1564000	usd
CY2023Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
CY2022Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
CY2023Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P11Y1M13D
CY2022Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P11Y9M21D
CY2023Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0355
CY2022Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0356
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	4884000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	6069000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	5729000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4967000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4007000	usd
CY2023Q1	nfbk	Lessee Operating Lease Liability Payments Due After Year Four LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour	22557000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	48213000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	9704000	usd
CY2023Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	38509000	usd

Files In Submission

Name	View Source	Status
FilingSummary.xml	Edgar Link	unprocessable
nfbk-20230331_cal.xml	Edgar Link	unprocessable
nfbk-20230331_def.xml	Edgar Link	unprocessable
0001493225-23-000079-index-headers.html	Edgar Link	pending
0001493225-23-000079-index.html	Edgar Link	pending
0001493225-23-000079.txt	Edgar Link	pending
0001493225-23-000079-xbrl.zip	Edgar Link	pending
ex311-2023x3x31.htm	Edgar Link	pending
ex312-2023x3x31.htm	Edgar Link	pending
ex32-2023x3x31.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
nfbk-20230331.htm	Edgar Link	pending
nfbk-20230331.xsd	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
nfbk-20230331_lab.xml	Edgar Link	unprocessable
nfbk-20230331_pre.xml	Edgar Link	unprocessable
nfbk-20230331_htm.xml	Edgar Link	completed
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$NFBK
Northfield Bancorp, Inc. Stock $nfbk

2023 Q2 Form 10-Q Financial Statement

#000149322523000079 Filed on May 10, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NFBK Northfield Bancorp, Inc. Stock $nfbk

2023 Q2 Form 10-Q Financial Statement

#000149322523000079 Filed on May 10, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NFBK
Northfield Bancorp, Inc. Stock $nfbk