$NFBK
Northfield Bancorp, Inc. Stock $nfbk

$nfbk Overview Financials Valuation SEC Filings Company Website

2012 Q4 Form 10-K Financial Statement

#000119312513112474 Filed on March 18, 2013

Income Statement

Concept	2012 Q4	2012 Q3	2012 Q2
Revenue	$23.35M	$22.69M	$22.76M
YoY Change	-2.15%	-0.13%	1.44%
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	$840.0K	$850.0K	$790.0K
YoY Change	6.33%	49.12%	49.06%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$5.392M	$5.691M	$5.747M
YoY Change	-12.11%	-11.66%	-13.04%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$5.027M	$6.179M	$6.098M
YoY Change	50.33%	7.82%	-8.78%
Income Tax	$1.786M	$2.285M	$2.150M
% Of Pretax Income	35.53%	36.98%	35.26%
Net Earnings	$3.241M	$3.894M	$3.948M
YoY Change	-14.93%	5.36%	-9.18%
Net Earnings / Revenue	13.88%	17.16%	17.35%
Basic Earnings Per Share	$0.06	$0.07	$0.07
Diluted Earnings Per Share	$0.06	$0.07	$0.07
COMMON SHARES
Basic Shares Outstanding
Diluted Shares Outstanding

Balance Sheet

Concept	2012 Q4	2012 Q3	2012 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$128.8M
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	$29.79M	$24.10M	$23.10M
YoY Change	49.01%	31.69%	32.0%
Goodwill	$16.16M
YoY Change	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	$2.813B	$2.491B	$2.464B
YoY Change	18.35%	6.86%	6.77%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$18.90M	$20.60M	$15.10M
YoY Change	13.86%	-28.47%	4.86%
Deferred Revenue
YoY Change
Short-Term Debt	$419.1M	$499.9M	$513.6M
YoY Change	-13.03%	10.04%	15.55%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$18.90M	$20.60M	$15.10M
YoY Change	13.86%	-28.47%	4.86%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$0.00	$0.00	$0.00
YoY Change
TOTAL LIABILITIES
Total Short-Term Liabilities	$18.90M	$20.60M	$15.10M
Total Long-Term Liabilities	$0.00	$0.00	$0.00
Total Liabilities	$2.398B	$2.095B	$2.075B
YoY Change	20.26%	7.96%	8.67%
SHAREHOLDERS EQUITY
Retained Earnings	$249.9M
YoY Change	5.99%
Common Stock	$469.0K
YoY Change	2.85%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$70.01M
YoY Change	6.42%
Treasury Stock Shares	5.417M shares
Shareholders Equity	$414.9M	$395.8M	$388.9M
YoY Change
Total Liabilities & Shareholders Equity	$2.813B	$2.491B	$2.464B
YoY Change	18.35%	6.86%	6.77%

Cashflow Statement

Concept	2012 Q4	2012 Q3	2012 Q2
OPERATING ACTIVITIES
Net Income	$3.241M	$3.894M	$3.948M
YoY Change	-14.93%	5.36%	-9.18%
Depreciation, Depletion And Amortization	$840.0K	$850.0K	$790.0K
YoY Change	6.33%	49.12%	49.06%
Cash From Operating Activities	$8.330M	$4.660M	-$160.0K
YoY Change	-18.57%	-30.86%	-104.98%
INVESTING ACTIVITIES
Capital Expenditures	-$1.880M	-$1.670M	-$1.670M
YoY Change	-18.61%	27.48%	0.6%
Acquisitions
YoY Change
Other Investing Activities	-$98.83M	-$20.14M	-$85.61M
YoY Change	-162.97%	-43.4%	275.32%
Cash From Investing Activities	-$100.7M	-$21.82M	-$87.27M
YoY Change	-165.11%	-40.85%	256.5%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	189.1M	14.79M	75.97M
YoY Change	-242.07%	1872.0%	-993.76%
NET CHANGE
Cash From Operating Activities	8.330M	4.660M	-160.0K
Cash From Investing Activities	-100.7M	-21.82M	-87.27M
Cash From Financing Activities	189.1M	14.79M	75.97M
Net Change In Cash	96.76M	-2.370M	-11.46M
YoY Change	204.76%	-91.94%	-61.5%
FREE CASH FLOW
Cash From Operating Activities	$8.330M	$4.660M	-$160.0K
Capital Expenditures	-$1.880M	-$1.670M	-$1.670M
Free Cash Flow	$10.21M	$6.330M	$1.510M
YoY Change	-18.58%	-21.37%	-68.99%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2011Q4	us-gaap	Loans Receivable Net LoansReceivableNet	985945000
CY2011Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	84511000
CY2011Q4	us-gaap	Accounts Payable And Other Accrued Liabilities AccountsPayableAndOtherAccruedLiabilities	16607000
CY2011Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	262435000
CY2011Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	8610000
CY2011Q4	us-gaap	Weighted Average Rate Domestic Deposit Money Market WeightedAverageRateDomesticDepositMoneyMarket	0.0077	pure
CY2011Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	40869000
CY2012Q4	us-gaap	Minority Interest Ownership Percentage By Noncontrolling Owners MinorityInterestOwnershipPercentageByNoncontrollingOwners	0.031	pure
CY2012Q4	nfbk	Business Acquisition Issued Stock Per Share BusinessAcquisitionIssuedStockPerShare	0.4748	shares
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	58202819	shares
CY2010Q3	nfbk	Deferred Tax Liabilities Reversed DeferredTaxLiabilitiesReversed	738000
CY2009Q4	us-gaap	Stockholders Equity StockholdersEquity	391540000
CY2009Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	15414000
CY2009Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	176000
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	42544000
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	396717000
CY2010Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	21819000
CY2010Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	1668000
CY2010Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	330000
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CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	43852000
CY2010Q4	nfbk	Statutory Income Tax Rate StatutoryIncomeTaxRate	0.35	pure
CY2010Q4	nfbk	Average Balance Of Impaired Loans AverageBalanceOfImpairedLoans	54300000
CY2011Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	156493000
CY2011Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	12677000
CY2011Q4	us-gaap	Trading Securities TradingSecurities	4146000
CY2011Q4	us-gaap	Goodwill Goodwill	16159000
CY2011Q4	us-gaap	Loans And Leases Receivable Other LoansAndLeasesReceivableOther	1496000
CY2011Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	15539000
CY2011Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1038000
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	6263000
CY2011Q4	us-gaap	Financing Receivable Recorded Investment1 To29 Days Past Due FinancingReceivableRecordedInvestment1To29DaysPastDue	19492000
CY2011Q4	us-gaap	Held To Maturity Securities Pledged As Collateral HeldToMaturitySecuritiesPledgedAsCollateral	0
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	382650000
CY2011Q4	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	2201000
CY2011Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	430087000
CY2011Q4	us-gaap	Other Assets OtherAssets	15059000
CY2011Q4	us-gaap	Weighted Average Rate Domestic Deposit Certificates Of Deposit WeightedAverageRateDomesticDepositCertificatesOfDeposit	0.0121	pure
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CY2011Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	276000000
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CY2011Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	5114020	shares
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	135000
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CY2011Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	14542000
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	2050000
CY2011Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1069139000
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CY2011Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	26836000
CY2011Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax	106000
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CY2011Q4	us-gaap	Financing Receivable Modifications Number Of Contracts1 FinancingReceivableModificationsNumberOfContracts1	13	Relationship
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CY2011Q4	us-gaap	Weighted Average Interest Rate Of Time Deposits100000 Or More WeightedAverageInterestRateOfTimeDeposits100000OrMore	0.0136	pure
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	235776000
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CY2011Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	578000
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CY2011Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	20081000
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CY2011Q4	us-gaap	Treasury Stock Value TreasuryStockValue	65784000
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CY2011Q4	nfbk	Loans Receivable Commercial And Industrial Insurance Premium And Other Loans LoansReceivableCommercialAndIndustrialInsurancePremiumAndOtherLoans	73302000
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CY2011Q4	nfbk	Principal Amount Outstanding Of Impaired Loans Heldfor Investment And Heldfor Sale PrincipalAmountOutstandingOfImpairedLoansHeldforInvestmentAndHeldforSale	39100000
CY2011Q4	nfbk	Purchased Credit Impaired Loans Held For Investment PurchasedCreditImpairedLoansHeldForInvestment	88522000
CY2011Q4	nfbk	Trouble Debt Restructuring Amount TroubleDebtRestructuringAmount	41600000
CY2011Q4	nfbk	Deferred Tax Assets Asset Retirement Obligations DeferredTaxAssetsAssetRetirementObligations	102000
CY2011Q4	nfbk	Average Balance Of Impaired Loans AverageBalanceOfImpairedLoans	58700000
CY2011Q4	nfbk	Deferred Tax Assets Allowance For Credit Losses DeferredTaxAssetsAllowanceForCreditLosses	10783000
CY2011Q4	nfbk	Deferred Tax Assets Capital Leases DeferredTaxAssetsCapitalLeases	697000
CY2011Q4	nfbk	Deferred Tax Assets Deferred Compensation DeferredTaxAssetsDeferredCompensation	2399000
CY2011Q4	nfbk	Deferred Tax Assets Net Actuarial Loss On Defined Benefit Post Retirement Benefit Plans DeferredTaxAssetsNetActuarialLossOnDefinedBenefitPostRetirementBenefitPlans	201000
CY2011Q4	nfbk	Deferred Tax Liabilities Fair Market Value Of Acquired Loans DeferredTaxLiabilitiesFairMarketValueOfAcquiredLoans	2359000
CY2011Q4	nfbk	Deferred Tax Liability Deferred Loan Fees DeferredTaxLiabilityDeferredLoanFees	179000
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CY2011Q4	nfbk	Repurchase Agreement Included In Overnight Accounts RepurchaseAgreementIncludedInOvernightAccounts	276000000
CY2011Q4	nfbk	Savings Passbook And Statement SavingsPassbookAndStatement	334994000
CY2011Q4	nfbk	Total Transaction TotalTransaction	248322000
CY2011Q4	nfbk	Weighted Average Interest Rate Of Time Deposits Under Hundred Thousand WeightedAverageInterestRateOfTimeDepositsUnderHundredThousand	0.0108	pure
CY2011Q4	nfbk	Weighted Average Interest Rate On Negotiable Orders Of Withdrawal WeightedAverageInterestRateOnNegotiableOrdersOfWithdrawal	0.0060	pure
CY2011Q4	nfbk	Weighted Average Interest Rate On Non Interest Bearing And Interest Bearing Deposit Liabilities WeightedAverageInterestRateOnNonInterestBearingAndInterestBearingDepositLiabilities		pure
CY2011Q4	nfbk	Weighted Average Interest Rate On Total Deposits WeightedAverageInterestRateOnTotalDeposits	0.0071	pure
CY2011Q4	nfbk	Weighted Average Interest Rate On Total Transaction WeightedAverageInterestRateOnTotalTransaction	0.0022	pure
CY2011Q4	nfbk	Weighted Average Interest Rates On Passbook Accounts WeightedAverageInterestRatesOnPassbookAccounts	0.0028	pure
CY2011Q4	nfbk	Deferred Tax Assets Accrued Salaries And Benefits And Other DeferredTaxAssetsAccruedSalariesAndBenefitsAndOther	718000
CY2011Q4	nfbk	Estimated Fair Value Of Impaired Loans Held For Investment And Held For Sale EstimatedFairValueOfImpairedLoansHeldForInvestmentAndHeldForSale	35700000
CY2011Q4	nfbk	Regulatory Cash At Federal Reserve Bank RegulatoryCashAtFederalReserveBank	197000
CY2012Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	209639000
CY2012Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	12550000
CY2012Q4	us-gaap	Trading Securities TradingSecurities	4677000
CY2012Q4	us-gaap	Goodwill Goodwill	16159000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	3878000
CY2012Q4	us-gaap	Loans And Leases Receivable Other LoansAndLeasesReceivableOther	1804000
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	247000
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	114466000
CY2012Q4	us-gaap	Accounts Payable And Other Accrued Liabilities AccountsPayableAndOtherAccruedLiabilities	18858000
CY2012Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	251387000
CY2012Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	8154000
CY2012Q4	us-gaap	Weighted Average Rate Domestic Deposit Money Market WeightedAverageRateDomesticDepositMoneyMarket	0.0046	pure
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	53462000
CY2012Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1216558000
CY2012Q4	us-gaap	Loans Receivable Net LoansReceivableNet	1066200000
CY2012Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	35085000
CY2012Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	25354000
CY2012Q4	us-gaap	Share Price SharePrice	12.91
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	10098000
CY2012Q4	us-gaap	Financing Receivable Recorded Investment1 To29 Days Past Due FinancingReceivableRecordedInvestment1To29DaysPastDue	18710000
CY2012Q4	us-gaap	Held To Maturity Securities Pledged As Collateral HeldToMaturitySecuritiesPledgedAsCollateral	0
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	414873000
CY2012Q4	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	3488000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	3860000
CY2012Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	514069000
CY2012Q4	us-gaap	Other Assets OtherAssets	19347000
CY2012Q4	us-gaap	Weighted Average Rate Domestic Deposit Certificates Of Deposit WeightedAverageRateDomesticDepositCertificatesOfDeposit	0.0110	pure
CY2012Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	117762000
CY2012Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	226000000
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	157000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	2183000
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	254000
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax	-376000
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	122703000
CY2012Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	58487000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	3929000
CY2012Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	103407000
CY2012Q4	us-gaap	Financing Receivable Modifications Number Of Contracts1 FinancingReceivableModificationsNumberOfContracts1	5	Relationship
CY2012Q4	us-gaap	Loans Receivable Held For Sale Net LoansReceivableHeldForSaleNet	5447000
CY2012Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	241005000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Returns And Allowances DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReturnsAndAllowances	1806000
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000	shares
CY2012Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2220000
CY2012Q4	us-gaap	Loans Receivable Commercial And Industrial LoansReceivableCommercialAndIndustrial	14786000
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	1275631000
CY2012Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	43431000
CY2012Q4	us-gaap	Other Borrowings OtherBorrowings	193122000
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	5417467	shares
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	144000
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	34947000
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	13663000
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	194000
CY2012Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1244777000
CY2012Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	54415000
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	41486819	shares
CY2012Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	26424000
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax	90000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	3980000
CY2012Q4	us-gaap	Liabilities Liabilities	2398328000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	38670000
CY2012Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1700000
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	411000
CY2012Q4	us-gaap	Fair Value Option Loans Held As Assets Aggregate Amount In Nonaccrual Status FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatus	5400000
CY2012Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	93042000
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	619000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	3738000
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2012Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	870000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	35037000
CY2012Q4	us-gaap	Weighted Average Interest Rate Of Time Deposits100000 Or More WeightedAverageInterestRateOfTimeDeposits100000OrMore	0.0125	pure
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	1886000
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	249892000
CY2012Q4	us-gaap	Assets Assets	2813201000
CY2012Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	1778000
CY2012Q4	us-gaap	Loans And Leases Receivable Consumer Real Estate LoansAndLeasesReceivableConsumerRealEstate	1047128000
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	269000
CY2012Q4	us-gaap	Deposits Deposits	1956860000
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	31048000
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	3615000
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	15146000
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2813201000
CY2012Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0325	pure
CY2012Q4	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment1 FinancingReceivableModificationsPostModificationRecordedInvestment1	7096000
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	399000
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	22809000
CY2012Q4	us-gaap	Weighted Average Rate Domestic Deposit Savings WeightedAverageRateDomesticDepositSavings	0.0032	pure
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	419122000
CY2012Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	2463884	shares
CY2012Q4	us-gaap	Longterm Debt Percentage Bearing Variable Interest Amount LongtermDebtPercentageBearingVariableInterestAmount	3394000
CY2012Q4	us-gaap	Time Deposits TimeDeposits	492392000
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	70007000
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	8237000
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	128761000
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	194000
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	46904286	shares
CY2012Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	306000
CY2012Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	621000
CY2012Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	1468000
CY2012Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	254190000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost	73707000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	34354000
CY2012Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	2309000
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	18231000
CY2012Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	188260000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	732000
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax	-50000
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	39317000
CY2012Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1137067000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	195000
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	37000
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	469000
CY2012Q4	us-gaap	Employee Stock Ownership Plan Esop Deferred Shares EmployeeStockOwnershipPlanESOPDeferredShares	13965000
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	5400000
CY2012Q4	us-gaap	Other Real Estate OtherRealEstate	870000
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	23761000
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2012Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1242982000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	53739000
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	23677000
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	29785000
CY2012Q4	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment1 FinancingReceivableModificationsPreModificationRecordedInvestment1	7096000
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	230253000
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	35568000
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther
CY2012Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	12332000
CY2012Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	1275631000
CY2012Q4	nfbk	Deferred Tax Assets Pension And Postretirement Benefits DeferredTaxAssetsPensionAndPostretirementBenefits	519000
CY2012Q4	nfbk	Deferred Tax Assets Depreciation DeferredTaxAssetsDepreciation	582000
CY2012Q4	nfbk	Loans And Leases Receivable Purchase Credit Impaired Loans LoansAndLeasesReceivablePurchaseCreditImpairedLoans	71500000
CY2012Q4	nfbk	Defined Benefit Plan Accumulated Other Comprehensive Income Net Of Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetOfTax	516000
CY2012Q4	nfbk	Available For Sale Securities Debt Maturities Fair Value Total AvailableForSaleSecuritiesDebtMaturitiesFairValueTotal	74402000
CY2012Q4	nfbk	Financing Receivable Recorded Investment30 To89 Days Past Due FinancingReceivableRecordedInvestment30To89DaysPastDue	1091000
CY2012Q4	nfbk	Statutory Income Tax Rate StatutoryIncomeTaxRate	0.35	pure
CY2012Q4	nfbk	Initial Public Offering Price Per Share InitialPublicOfferingPricePerShare	7.13
CY2012Q4	nfbk	Impaired Financing Receivable Related Allowance With Allowance Recorded ImpairedFinancingReceivableRelatedAllowanceWithAllowanceRecorded	-3615000
CY2012Q4	nfbk	Available For Sale Securities Carrying Value AvailableForSaleSecuritiesCarryingValue	14300000
CY2012Q4	nfbk	Deferred Loan Cost Net DeferredLoanCostNet	2456000
CY2012Q4	nfbk	Investment In Non Accrual Loans InvestmentInNonAccrualLoans	34900000
CY2012Q4	nfbk	Loans Deemed To Be Impaired Non Accrual Amount LoansDeemedToBeImpairedNonAccrualAmount	26000000
CY2012Q4	nfbk	Loans Past Due Ninety Days Or More And Still Accruing Interest Amount LoansPastDueNinetyDaysOrMoreAndStillAccruingInterestAmount	621000
CY2012Q4	nfbk	Loans Receivable Commercial And Industrial Insurance Premium And Other Loans LoansReceivableCommercialAndIndustrialInsurancePremiumAndOtherLoans	16616000
CY2012Q4	nfbk	Loans Receivable Insurance Premium Loans LoansReceivableInsurancePremiumLoans	26000
CY2012Q4	nfbk	Originated Loan Individually Evaluated For Impairment One OriginatedLoanIndividuallyEvaluatedForImpairmentOne	51699000
CY2012Q4	nfbk	Originated Loans Collectively Evaluated For Impairment OriginatedLoansCollectivelyEvaluatedForImpairment	1014501000
CY2012Q4	nfbk	Originated Loans Held For Investment Net OriginatedLoansHeldForInvestmentNet	1066200000
CY2012Q4	nfbk	Principal Amount Outstanding Of Impaired Loans Heldfor Investment And Heldfor Sale PrincipalAmountOutstandingOfImpairedLoansHeldforInvestmentAndHeldforSale	43700000
CY2012Q4	nfbk	Principal Balance Threshold For Non Accrual Status PrincipalBalanceThresholdForNonAccrualStatus	500000
CY2012Q4	nfbk	Purchased Credit Impaired Loans Held For Investment PurchasedCreditImpairedLoansHeldForInvestment	75349000
CY2012Q4	nfbk	Trouble Debt Restructuring Amount TroubleDebtRestructuringAmount	45000000
CY2012Q4	nfbk	Deferred Tax Assets Asset Retirement Obligations DeferredTaxAssetsAssetRetirementObligations	102000
CY2012Q4	nfbk	Average Balance Of Impaired Loans AverageBalanceOfImpairedLoans	54300000
CY2012Q4	nfbk	Deferred Tax Assets Allowance For Credit Losses DeferredTaxAssetsAllowanceForCreditLosses	11373000
CY2012Q4	nfbk	Deferred Tax Assets Capital Leases DeferredTaxAssetsCapitalLeases	607000
CY2012Q4	nfbk	Deferred Tax Assets Deferred Compensation DeferredTaxAssetsDeferredCompensation	2503000
CY2012Q4	nfbk	Deferred Tax Assets Net Actuarial Loss On Defined Benefit Post Retirement Benefit Plans DeferredTaxAssetsNetActuarialLossOnDefinedBenefitPostRetirementBenefitPlans	197000
CY2012Q4	nfbk	Deferred Tax Liability Deferred Loan Fees DeferredTaxLiabilityDeferredLoanFees	531000
CY2012Q4	nfbk	Defined Benefit Plan Pension Liabilities DefinedBenefitPlanPensionLiabilities	1778000
CY2012Q4	nfbk	Federal Tax Bad Debt Deferred Tax Liability FederalTaxBadDebtDeferredTaxLiability	2800000
CY2012Q4	nfbk	Financing Receivable Recorded Investments Non Accrual Status FinancingReceivableRecordedInvestmentsNonAccrualStatus	3500000
CY2012Q4	nfbk	Repurchase Agreement Included In Overnight Accounts RepurchaseAgreementIncludedInOvernightAccounts	226000000
CY2012Q4	nfbk	Savings Passbook And Statement SavingsPassbookAndStatement	622998000
CY2012Q4	nfbk	Stock Offering Date StockOfferingDate	2010-09-30
CY2012Q4	nfbk	Total Transaction TotalTransaction	327401000
CY2012Q4	nfbk	Unencumbered Securities UnencumberedSecurities	750900000
CY2012Q4	nfbk	Weighted Average Interest Rate Of Time Deposits Under Hundred Thousand WeightedAverageInterestRateOfTimeDepositsUnderHundredThousand	0.0096	pure
CY2012Q4	nfbk	Weighted Average Interest Rate On Negotiable Orders Of Withdrawal WeightedAverageInterestRateOnNegotiableOrdersOfWithdrawal	0.0037	pure
CY2012Q4	nfbk	Weighted Average Interest Rate On Non Interest Bearing And Interest Bearing Deposit Liabilities WeightedAverageInterestRateOnNonInterestBearingAndInterestBearingDepositLiabilities		pure
CY2012Q4	nfbk	Weighted Average Interest Rate On Total Deposits WeightedAverageInterestRateOnTotalDeposits	0.0049	pure
CY2012Q4	nfbk	Weighted Average Interest Rate On Total Transaction WeightedAverageInterestRateOnTotalTransaction	0.0013	pure
CY2012Q4	nfbk	Weighted Average Interest Rates On Passbook Accounts WeightedAverageInterestRatesOnPassbookAccounts	0.0021	pure
CY2012Q4	nfbk	Deferred Tax Liabilities Adjustment Of Investment Securities DeferredTaxLiabilitiesAdjustmentOfInvestmentSecurities	754000
CY2012Q4	nfbk	Deferred Tax Assets Accrued Salaries And Benefits And Other DeferredTaxAssetsAccruedSalariesAndBenefitsAndOther	742000
CY2012Q4	nfbk	Deferred Tax Assets Related To Fair Value Adjustments On Business Acquisitions DeferredTaxAssetsRelatedToFairValueAdjustmentsOnBusinessAcquisitions	433000
CY2012Q4	nfbk	Estimated Fair Value Of Impaired Loans Held For Investment And Held For Sale EstimatedFairValueOfImpairedLoansHeldForInvestmentAndHeldForSale	36900000
CY2012Q4	nfbk	Deferred Tax Liabilities Adjustment Of Deposit Liabilities DeferredTaxLiabilitiesAdjustmentOfDepositLiabilities	46000
CY2012Q4	nfbk	Additional Funding Federal Home Loan Bank Advances Long Term AdditionalFundingFederalHomeLoanBankAdvancesLongTerm	854000000
CY2012Q4	nfbk	Certain Loans Acquired In Transfer CertainLoansAcquiredInTransfer	101433000
CY2012Q4	nfbk	Multifamily Loans Held As Collateral By Federal Home Loan Bank MultifamilyLoansHeldAsCollateralByFederalHomeLoanBank	190400000
CY2012Q4	nfbk	Regulatory Cash At Federal Reserve Bank RegulatoryCashAtFederalReserveBank	1000000
CY2013Q1	dei	Entity Public Float EntityPublicFloat	647793784
CY2010	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	962000
CY2010	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	6799000
CY2010	us-gaap	Interest Expense Deposits InterestExpenseDeposits	13573000
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1235000
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-279000
CY2010	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	95000
CY2010	us-gaap	Impairment Of Investments ImpairmentOfInvestments	962000
CY2010	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	266501000
CY2010	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	197000
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3020000
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	12558000
CY2010	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	581525000
CY2010	us-gaap	Noninterest Income NoninterestIncome	6842000
CY2010	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	184000
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	7057000
CY2010	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	46681000
CY2010	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	4000
CY2010	us-gaap	Increase Decrease In Customer Advances IncreaseDecreaseInCustomerAdvances	-64000
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	3819000
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2010	us-gaap	Fees And Commissions FeesAndCommissions	2582000
CY2010	us-gaap	Interest Expense Negotiable Order Of Withdrawal Now Deposits InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits	3546000
CY2010	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	394000
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1315000
CY2010	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2521000
CY2010	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	3363000
CY2010	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2010	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	8213000
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8114000
CY2010	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	395505	shares
CY2010	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0550	pure
CY2010	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	137000
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	25575000
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-180820000
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	9776000
CY2010	us-gaap	Dividends Common Stock DividendsCommonStock	3308000
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1590000
CY2010	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1805000
CY2010	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	8213000
CY2010	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	2905000
CY2010	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	6011000
CY2010	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	55957000
CY2010	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5369000
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	1308000
CY2010	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	1684000
CY2010	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	378501000
CY2010	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	18000
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-46000
CY2010	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2273000
CY2010	us-gaap	Occupancy Net OccupancyNet	5149000
CY2010	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3308000
CY2010	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3954000
CY2010	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	52005000
CY2010	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	1245000
CY2010	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	3679000
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	58461615	shares
CY2010	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	137000
CY2010	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	-808000
CY2010	us-gaap	Equipment Expense EquipmentExpense	1070000
CY2010	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	86495000
CY2010	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-20000
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	20163000
CY2010	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	6370000
CY2010	us-gaap	Interest Income Federal Home Loan Bank Advances InterestIncomeFederalHomeLoanBankAdvances	354000
CY2010	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	149000
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1235000
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2010	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	3699000
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	156553000
CY2010	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	10084000
CY2010	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	6849000
CY2010	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	799000
CY2010	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	13.37
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-85000
CY2010	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	-88000
CY2010	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	62089000
CY2010	us-gaap	Interest Expense Debt InterestExpenseDebt	10833000
CY2010	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	288000
CY2010	us-gaap	Professional Fees ProfessionalFees	3613000
CY2010	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	845781000
CY2010	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	5713000
CY2010	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	8454000
CY2010	us-gaap	Noninterest Expense NoninterestExpense	38684000
CY2010	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	10833000
CY2010	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-181000
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	58066110	shares
CY2010	us-gaap	Defined Benefit Plan Amortization Of Net Prior Service Cost Credit DefinedBenefitPlanAmortizationOfNetPriorServiceCostCredit	15000
CY2010	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Net AllowanceForLoanAndLeaseLossesProvisionForLossNet	10084000
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1161000
CY2010	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	1853000
CY2010	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	1516000
CY2010	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	154000
CY2010	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	1263000
CY2010	us-gaap	Depreciation Depreciation	1800000
CY2010	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	197000
CY2010	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	597000
CY2010	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	1300000
CY2010	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	-5000
CY2010	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	117000
CY2010	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	221187000
CY2010	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	187000
CY2010	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	70747000
CY2010	us-gaap	Interest Paid InterestPaid	24463000
CY2010	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-429000
CY2011	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	202000
CY2011	us-gaap	Impairment Of Investments ImpairmentOfInvestments	1152000
CY2011	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	493594000
CY2010	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures
CY2010	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	103037000
CY2010	us-gaap	Defined Benefit Plan Amortization Of Net Transition Asset Obligation DefinedBenefitPlanAmortizationOfNetTransitionAssetObligation	-17000
CY2010	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	395505	shares
CY2010	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	10000
CY2010	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	-796000
CY2010	us-gaap	Net Income Loss NetIncomeLoss	13793000
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	231000
CY2010	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	239000
CY2010	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	721000
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2400000
CY2010	us-gaap	Labor And Related Expense LaborAndRelatedExpense	19056000
CY2010	us-gaap	Depreciation Nonproduction DepreciationNonproduction	1791000
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6370000
CY2010	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	34000
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-190000
CY2010	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0425	pure
CY2010	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	173000
CY2010	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	33306000
CY2010	us-gaap	Interest Expense InterestExpense	24406000
CY2010	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	143000
CY2010	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	154000
CY2010	nfbk	Stock Based Compensation StockBasedCompensation	3000000
CY2010	nfbk	Gain Loss On Sale Of Securities Net Of Tax GainLossOnSaleOfSecuritiesNetOfTax	1853000
CY2010	nfbk	Other Comprehensive Income Net Unrealized Gains And Losses On Securities Before Tax OtherComprehensiveIncomeNetUnrealizedGainsAndLossesOnSecuritiesBeforeTax	-105000
CY2010	nfbk	Other Comprehensive Income Postretirement Benefits Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomePostretirementBenefitsRecognizedInNetPeriodicPensionCostNetOfTax	151000
CY2010	nfbk	Amortization Of Premiums And Deferred Loan Costs AmortizationOfPremiumsAndDeferredLoanCosts	1101000
CY2010	nfbk	Other Real Estate Owned Charged Off OtherRealEstateOwnedChargedOff	146000
CY2010	nfbk	Company Contribution To Supplemental Employee Stock Ownership Plan CompanyContributionToSupplementalEmployeeStockOwnershipPlan	33000
CY2010	nfbk	Decrease Increase In Prepaid Fdic Assessment DecreaseIncreaseInPrepaidFdicAssessment	-1610000
CY2010	nfbk	Defined Benefit Plan Amortization Of Unrecognized Gain Loss DefinedBenefitPlanAmortizationOfUnrecognizedGainLoss	26000
CY2010	nfbk	Defined Benefit Plan Assumptions Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsCalculatingBenefitObligationRateOfCompensationIncrease	0.0400	pure
CY2010	nfbk	Defined Benefit Plan Direct Benefit Payments DefinedBenefitPlanDirectBenefitPayments	108000
CY2010	nfbk	Esop Compensation Expense EsopCompensationExpense	774000
CY2010	nfbk	Interest Expense Savings Passbook And Statement InterestExpenseSavingsPassbookAndStatement	1573000
CY2010	nfbk	Interest Income Recognized On Impaired Loans InterestIncomeRecognizedOnImpairedLoans	2800000
CY2010	nfbk	Loan To Finance Other Real Estate Owned LoanToFinanceOtherRealEstateOwned	900000
CY2010	nfbk	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included With Otti In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedWithOttiInNetIncomeNetOfTax	-154000
CY2010	nfbk	Payments To Acquire Bank Owned Life Insurance PaymentsToAcquireBankOwnedLifeInsurance	28781000
CY2011	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	1200000
CY2011	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAdditions	43937000
CY2011	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	6062000
CY2011	us-gaap	Interest Expense Deposits InterestExpenseDeposits	12251000
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6560000
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	283000
CY2011	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	77449000
CY2011	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	177000
CY2011	us-gaap	Increase Decrease In Customer Advances IncreaseDecreaseInCustomerAdvances	1508000
CY2011	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	84000
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3047000
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	23383000
CY2011	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	403389000
CY2011	us-gaap	Noninterest Income NoninterestIncome	11835000
CY2011	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	186000
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8162000
CY2011	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	55066000
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	3871000
CY2011	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	-73889000
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2011	us-gaap	Fees And Commissions FeesAndCommissions	2946000
CY2011	us-gaap	Interest Expense Negotiable Order Of Withdrawal Now Deposits InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits	3624000
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2257000
CY2011	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion	1444000
CY2011	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	117198000
CY2011	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2775000
CY2011	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	2628000
CY2011	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.16
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	37821000
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8319000
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	626094	shares
CY2011	us-gaap	Noncash Or Part Noncash Acquisition Intangible Assets Acquired1 NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1	1160000
CY2011	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0500	pure
CY2011	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	15000
CY2011	us-gaap	Noncash Or Part Noncash Acquisition Other Liabilities Assumed1 NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed1	2853000
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	27460000
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	10623000
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	9483000
CY2011	us-gaap	Dividends Common Stock DividendsCommonStock	3701000
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-626000
CY2011	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1629000
CY2011	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	37821000
CY2011	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	7000
CY2011	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	2883000
CY2011	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	3314000
CY2011	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-67550000
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6082000
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	21417000
CY2011	us-gaap	Defined Benefit Plan Benefits Paid DefinedBenefitPlanBenefitsPaid	104000
CY2011	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	1442000
CY2011	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	191087000
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	584508000
CY2011	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1659000
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-10000
CY2011	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2973000
CY2011	us-gaap	Occupancy Net OccupancyNet	6297000
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3701000
CY2011	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4168000
CY2011	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	53015000
CY2011	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	4372000
CY2011	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	7572000
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	56842888	shares
CY2011	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	15000
CY2011	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	-743000
CY2011	us-gaap	Equipment Expense EquipmentExpense	1204000
CY2011	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	91017000
CY2011	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-108000
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	23320000
CY2011	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	6497000
CY2011	us-gaap	Interest Income Federal Home Loan Bank Advances InterestIncomeFederalHomeLoanBankAdvances	439000
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	149000
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	6560000
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2011	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	7680000
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-16666000
CY2011	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	12589000
CY2011	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	10467000
CY2011	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	824000
CY2011	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	13.52
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-2754000
CY2011	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	-80000
CY2011	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	65604000
CY2011	us-gaap	Interest Expense Debt InterestExpenseDebt	13162000
CY2011	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	162000
CY2011	us-gaap	Professional Fees ProfessionalFees	2334000
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	476918000
CY2011	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	11206000
CY2011	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	3560000
CY2011	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	7600000
CY2011	us-gaap	Noninterest Expense NoninterestExpense	41530000
CY2011	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	13162000
CY2011	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-125000
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	56216794	shares
CY2011	us-gaap	Defined Benefit Plan Amortization Of Net Prior Service Cost Credit DefinedBenefitPlanAmortizationOfNetPriorServiceCostCredit	15000
CY2011	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Net AllowanceForLoanAndLeaseLossesProvisionForLossNet	12589000
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1061000
CY2011	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	2603000
CY2011	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	47000
CY2011	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	1497000
CY2011	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	7497000
CY2011	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	409000
CY2011	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1	-119000
CY2011	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	1196000
CY2011	us-gaap	Depreciation Depreciation	2100000
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	151000
CY2011	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	2900000
CY2011	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	-6000
CY2011	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	60000
CY2011	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	182658000
CY2011	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	217000
CY2011	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	-70747000
CY2011	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1	-5000
CY2011	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	72000
CY2011	us-gaap	Interest Paid InterestPaid	25008000
CY2011	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	134000
CY2011	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	435000
CY2011	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	169258000
CY2011	us-gaap	Defined Benefit Plan Amortization Of Net Transition Asset Obligation DefinedBenefitPlanAmortizationOfNetTransitionAssetObligation	-17000
CY2011	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	626094	shares
CY2011	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	10932000
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	-1041000
CY2011	us-gaap	Net Income Loss NetIncomeLoss	16823000
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	186000
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	190000
CY2011	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	571000
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2900000
CY2011	us-gaap	Labor And Related Expense LaborAndRelatedExpense	21626000
CY2011	us-gaap	Depreciation Nonproduction DepreciationNonproduction	2151000
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6497000
CY2011	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	20000
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	10513000
CY2011	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0400	pure
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	219000
CY2011	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	32033000
CY2011	us-gaap	Noncash Or Part Noncash Acquisition Other Assets Acquired1 NoncashOrPartNoncashAcquisitionOtherAssetsAcquired1	633000
CY2011	us-gaap	Interest Expense InterestExpense	25413000
CY2011	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	165000
CY2011	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	248000
CY2011	nfbk	Stock Based Compensation StockBasedCompensation	3000000
CY2011	nfbk	Gain Loss On Sale Of Securities Net Of Tax GainLossOnSaleOfSecuritiesNetOfTax	2603000
CY2011	nfbk	Other Comprehensive Income Net Unrealized Gains And Losses On Securities Before Tax OtherComprehensiveIncomeNetUnrealizedGainsAndLossesOnSecuritiesBeforeTax	13267000
CY2011	nfbk	Income Tax Reconciliation Gain On Bargain Purchase IncomeTaxReconciliationGainOnBargainPurchase	1246000
CY2011	nfbk	Defined Benefit Plan Unrecognized Prior Service Cost DefinedBenefitPlanUnrecognizedPriorServiceCost
CY2011	nfbk	Deferred Tax Liability Depreciation DeferredTaxLiabilityDepreciation	145000
CY2011	nfbk	Other Comprehensive Income Postretirement Benefits Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomePostretirementBenefitsRecognizedInNetPeriodicPensionCostNetOfTax	143000
CY2011	nfbk	Cash And Cash Equivalents Acquired Net Of Cash Paid Related To Acquisition CashAndCashEquivalentsAcquiredNetOfCashPaidRelatedToAcquisition	77449000
CY2011	nfbk	Allowance For Loan And Lease Losses Write Offs Detailed Amount AllowanceForLoanAndLeaseLossesWriteOffsDetailedAmount	7680000
CY2011	nfbk	Amortization Of Premiums And Deferred Loan Costs AmortizationOfPremiumsAndDeferredLoanCosts	1653000
CY2011	nfbk	Impaired Financing Receivables Charge Off ImpairedFinancingReceivablesChargeOff	7700000
CY2011	nfbk	Impaired Financing Receivables Provisions ImpairedFinancingReceivablesProvisions	4100000
CY2011	nfbk	Loans With Carrying Balances Not Written Down LoansWithCarryingBalancesNotWrittenDown	27900000
CY2011	nfbk	Other Real Estate Owned Charged Off OtherRealEstateOwnedChargedOff	26000
CY2011	nfbk	Company Contribution To Supplemental Employee Stock Ownership Plan CompanyContributionToSupplementalEmployeeStockOwnershipPlan	25000
CY2011	nfbk	Decrease Increase In Prepaid Fdic Assessment DecreaseIncreaseInPrepaidFdicAssessment	-1609000
CY2011	nfbk	Deferred Tax Assets Straight Line Rent Adjustments DeferredTaxAssetsStraightLineRentAdjustments	852000
CY2011	nfbk	Defined Benefit Plan Amortization Of Unrecognized Gain Loss DefinedBenefitPlanAmortizationOfUnrecognizedGainLoss	25000
CY2011	nfbk	Defined Benefit Plan Assumptions Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsCalculatingBenefitObligationRateOfCompensationIncrease	0.0400	pure
CY2011	nfbk	Defined Benefit Plan Direct Benefit Payments DefinedBenefitPlanDirectBenefitPayments	104000
CY2011	nfbk	Defined Benefit Plan Un Recognized Gain Loss DefinedBenefitPlanUnRecognizedGainLoss
CY2011	nfbk	Defined Benefit Plan Unrecognized Net Transition Obligation DefinedBenefitPlanUnrecognizedNetTransitionObligation
CY2011	nfbk	Esop Compensation Expense EsopCompensationExpense	790000
CY2011	nfbk	Interest Expense Savings Passbook And Statement InterestExpenseSavingsPassbookAndStatement	1027000
CY2011	nfbk	Interest Income Recognized On Impaired Loans InterestIncomeRecognizedOnImpairedLoans	2500000
CY2011	nfbk	Non Cash Or Non Cash Acquisition Accrued Interest Receivable NonCashOrNonCashAcquisitionAccruedInterestReceivable	862000
CY2011	nfbk	Non Cash Or Non Cash Acquisition Deposits Assumed NonCashOrNonCashAcquisitionDepositsAssumed	188234000
CY2011	nfbk	Non Cash Or Non Cash Acquisition Loans Acquired NonCashOrNonCashAcquisitionLoansAcquired	91917000
CY2011	nfbk	Non Cash Or Non Cash Acquisition Other Real Estates Owned NonCashOrNonCashAcquisitionOtherRealEstatesOwned	1166000
CY2011	nfbk	Non Cash Or Non Cash Investment In Fhlb Stock Acquired NonCashOrNonCashInvestmentInFhlbStockAcquired	265000
CY2011	nfbk	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included With Otti In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedWithOttiInNetIncomeNetOfTax	-409000
CY2011	nfbk	Transfer Of Loans To Other Real Estate Owned TransferOfLoansToOtherRealEstateOwned	2509000
CY2012	dei	Trading Symbol TradingSymbol	NFBK
CY2012	dei	Entity Registrant Name EntityRegistrantName	NORTHFIELD BANCORP, INC.
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0001493225
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	24000
CY2012	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAdditions	833000
CY2012	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	8205000
CY2012	us-gaap	Interest Expense Deposits InterestExpenseDeposits	9837000
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	761000
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	462000
CY2012	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	4721000
CY2012	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	147000
CY2012	us-gaap	Impairment Of Investments ImpairmentOfInvestments	24000
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	466077000
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3029000
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	16792000
CY2012	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	420271000
CY2012	us-gaap	Noninterest Income NoninterestIncome	8586000
CY2012	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	204000
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8731000
CY2012	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	61514000
CY2012	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear	0.0475	pure
CY2012	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	490000
CY2012	us-gaap	Increase Decrease In Customer Advances IncreaseDecreaseInCustomerAdvances	1287000
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	3907000
CY2012	us-gaap	Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed1 NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1	12737000
CY2012	us-gaap	Employee Stock Ownership Plan Esop Debt Structure Direct Loan Description EmployeeStockOwnershipPlanESOPDebtStructureDirectLoanDescription	Funds borrowed by the Employee Stock Ownership Plan (ESOP) from the Company to purchase the Company's common stock are being repaid from the Bank's contributions over a period of up to 30 years.
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2012	us-gaap	Fees And Commissions FeesAndCommissions	3005000
CY2012	us-gaap	Interest Expense Negotiable Order Of Withdrawal Now Deposits InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits	3226000
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1876000
CY2012	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0
CY2012	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion	6424000
CY2012	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	131922000
CY2012	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	3739000
CY2012	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-585000
CY2012	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.09
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4344000
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	10081000
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	776213	shares
CY2012	us-gaap	Noncash Or Part Noncash Acquisition Intangible Assets Acquired1 NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1	592000
CY2012	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0400	pure
CY2012	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	16000
CY2012	us-gaap	Noncash Or Part Noncash Acquisition Other Liabilities Assumed1 NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed1	3540000
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	27977000
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-244803000
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	7991000
CY2012	us-gaap	Dividends Common Stock DividendsCommonStock	1722000
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-857000
CY2012	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate DefinedBenefitPlanUltimateHealthCareCostTrendRate	0.0875	pure
CY2012	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1628000
CY2012	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	4344000
CY2012	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	6000
CY2012	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	2733000
CY2012	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	2588000
CY2012	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	352766000
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8035000
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	63492000
CY2012	us-gaap	Defined Benefit Plan Benefits Paid DefinedBenefitPlanBenefitsPaid	107000
CY2012	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	32275000
CY2012	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	119185000
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	398439000
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-4340000
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-85000
CY2012	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2883000
CY2012	us-gaap	Occupancy Net OccupancyNet	8192000
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1722000
CY2012	us-gaap	Other Noninterest Expense OtherNoninterestExpense	5072000
CY2012	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	65359000
CY2012	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	616000
CY2012	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	3949000
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	55115680	shares
CY2012	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	-72000
CY2012	us-gaap	Equipment Expense EquipmentExpense	1463000
CY2012	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	91539000
CY2012	us-gaap	Allowance For Loan And Lease Losses Recoveries Of Bad Debts AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts	-245000
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	24947000
CY2012	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	8916000
CY2012	us-gaap	Interest Income Federal Home Loan Bank Advances InterestIncomeFederalHomeLoanBankAdvances	591000
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	149000
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	761000
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2012	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	4193000
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	280318000
CY2012	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	3536000
CY2012	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	13314000
CY2012	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	878000
CY2012	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	13.81
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-2150000
CY2012	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	-66000
CY2012	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	68895000
CY2012	us-gaap	Interest Expense Debt InterestExpenseDebt	12807000
CY2012	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	188000
CY2012	us-gaap	Professional Fees ProfessionalFees	3279000
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	801492000
CY2012	us-gaap	Noninterest Expense NoninterestExpense	48998000
CY2012	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	12807000
CY2012	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	5384510	shares
CY2012	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	17107000
CY2012	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	5701000
CY2012	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-899000
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	54339467	shares
CY2012	us-gaap	Defined Benefit Plan Amortization Of Net Prior Service Cost Credit DefinedBenefitPlanAmortizationOfNetPriorServiceCostCredit	15000
CY2012	us-gaap	Allowance For Loan And Lease Losses Provision For Loss Net AllowanceForLoanAndLeaseLossesProvisionForLossNet	3536000
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1568000
CY2012	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	2534000
CY2012	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	115000
CY2012	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	4586000
CY2012	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	1529000
CY2012	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	5446000
CY2012	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	24000
CY2012	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1	-122000
CY2012	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-1289000
CY2012	us-gaap	Depreciation Depreciation	2800000
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	384000
CY2012	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	3000000
CY2012	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	-7000
CY2012	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	57000
CY2012	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	207700000
CY2012	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	251000
CY2012	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1	-5000
CY2012	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	0
CY2012	us-gaap	Interest Paid InterestPaid	22997000
CY2012	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	136000
CY2012	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	578000
CY2012	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	17458000
CY2012	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	711000
CY2012	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	96339000
CY2012	us-gaap	Defined Benefit Plan Amortization Of Net Transition Asset Obligation DefinedBenefitPlanAmortizationOfNetTransitionAssetObligation	-17000
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	776213	shares
CY2012	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	1377000
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	-1009000
CY2012	us-gaap	Net Income Loss NetIncomeLoss	16031000
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	204000
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	376000
CY2012	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	3240000
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	3900000
CY2012	us-gaap	Labor And Related Expense LaborAndRelatedExpense	24096000
CY2012	us-gaap	Depreciation Nonproduction DepreciationNonproduction	2824000
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8916000
CY2012	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	-106000
CY2012	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	6529000
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1268000
CY2012	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0400	pure
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	316000
CY2012	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	26791000
CY2012	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	5077000
CY2012	us-gaap	Noncash Or Part Noncash Acquisition Other Assets Acquired1 NoncashOrPartNoncashAcquisitionOtherAssetsAcquired1	5792000
CY2012	us-gaap	Interest Expense InterestExpense	22644000
CY2012	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	55000
CY2012	nfbk	Stock Based Compensation StockBasedCompensation	3000000
CY2012	nfbk	Gain Loss On Sale Of Securities Net Of Tax GainLossOnSaleOfSecuritiesNetOfTax	2558000
CY2012	nfbk	Other Comprehensive Income Net Unrealized Gains And Losses On Securities Before Tax OtherComprehensiveIncomeNetUnrealizedGainsAndLossesOnSecuritiesBeforeTax	3418000
CY2012	nfbk	Defined Benefit Plan Unrecognized Prior Service Cost DefinedBenefitPlanUnrecognizedPriorServiceCost
CY2012	nfbk	Other Comprehensive Income Postretirement Benefits Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomePostretirementBenefitsRecognizedInNetPeriodicPensionCostNetOfTax	133000
CY2012	nfbk	Cash And Cash Equivalents Acquired Net Of Cash Paid Related To Acquisition CashAndCashEquivalentsAcquiredNetOfCashPaidRelatedToAcquisition	4721000
CY2012	nfbk	Allowance For Loan And Lease Losses Write Offs Detailed Amount AllowanceForLoanAndLeaseLossesWriteOffsDetailedAmount	4193000
CY2012	nfbk	Amortization Of Premiums And Deferred Loan Costs AmortizationOfPremiumsAndDeferredLoanCosts	339000
CY2012	nfbk	Fair Value Equity Level1 And Level2 Transfers Amount FairValueEquityLevel1AndLevel2TransfersAmount	0
CY2012	nfbk	Impaired Financing Receivables Charge Off ImpairedFinancingReceivablesChargeOff	3900000
CY2012	nfbk	Impaired Financing Receivables Provisions ImpairedFinancingReceivablesProvisions	3600000
CY2012	nfbk	Loans With Carrying Balances Not Written Down LoansWithCarryingBalancesNotWrittenDown	24900000
CY2012	nfbk	Maturity Period Of Cash And Cash Equivalents MaturityPeriodOfCashAndCashEquivalents	Three months or less
CY2012	nfbk	Maturity Period Of Certificates Of Deposit Maximum MaturityPeriodOfCertificatesOfDepositMaximum	Six months or greater
CY2012	nfbk	Maturity Period Of Certificates Of Deposit Minimum MaturityPeriodOfCertificatesOfDepositMinimum	Six-months or less
CY2012	nfbk	Other Real Estate Owned Charged Off OtherRealEstateOwnedChargedOff	512000
CY2012	nfbk	Period Of Loan Amount Due PeriodOfLoanAmountDue	P90D
CY2012	nfbk	Amount Of Bad Debts Reserved For In Current Year AmountOfBadDebtsReservedForInCurrentYear	5900000
CY2012	nfbk	Company Contribution To Supplemental Employee Stock Ownership Plan CompanyContributionToSupplementalEmployeeStockOwnershipPlan	25000
CY2012	nfbk	Cost Incurred In Postponed Stock Offering CostIncurredInPostponedStockOffering	1800000
CY2012	nfbk	Decrease Increase In Prepaid Fdic Assessment DecreaseIncreaseInPrepaidFdicAssessment	-1415000
CY2012	nfbk	Deferred Tax Assets Straight Line Rent Adjustments DeferredTaxAssetsStraightLineRentAdjustments	1024000
CY2012	nfbk	Defined Benefit Plan Amortization Of Unrecognized Gain Loss DefinedBenefitPlanAmortizationOfUnrecognizedGainLoss	28000
CY2012	nfbk	Defined Benefit Plan Assumptions Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsCalculatingBenefitObligationRateOfCompensationIncrease	0.0400	pure
CY2012	nfbk	Defined Benefit Plan Direct Benefit Payments DefinedBenefitPlanDirectBenefitPayments	107000
CY2012	nfbk	Defined Benefit Plan Ultimate Health Care Cost Trend Rate Reduction DefinedBenefitPlanUltimateHealthCareCostTrendRateReduction	0.0050	pure
CY2012	nfbk	Defined Benefit Plan Un Recognized Gain Loss DefinedBenefitPlanUnRecognizedGainLoss
CY2012	nfbk	Defined Benefit Plan Unrecognized Net Transition Obligation DefinedBenefitPlanUnrecognizedNetTransitionObligation
CY2012	nfbk	Esop Compensation Expense EsopCompensationExpense	856000
CY2012	nfbk	Guaranteed Lease Residual Values Period GuaranteedLeaseResidualValuesPeriod	P1Y
CY2012	nfbk	Interest Expense Savings Passbook And Statement InterestExpenseSavingsPassbookAndStatement	910000
CY2012	nfbk	Interest Income Recognized On Impaired Loans InterestIncomeRecognizedOnImpairedLoans	2800000
CY2012	nfbk	Loans Unpaid Balance Due Payable Date LoansUnpaidBalanceDuePayableDate	2007-12-31
CY2012	nfbk	Non Cash Or Non Cash Acquisition Accrued Interest Receivable NonCashOrNonCashAcquisitionAccruedInterestReceivable	443000
CY2012	nfbk	Non Cash Or Non Cash Acquisition Deposits Assumed NonCashOrNonCashAcquisitionDepositsAssumed	110568000
CY2012	nfbk	Non Cash Or Non Cash Acquisition Loans Acquired NonCashOrNonCashAcquisitionLoansAcquired	81876000
CY2012	nfbk	Non Cash Or Non Cash Acquisition Other Real Estates Owned NonCashOrNonCashAcquisitionOtherRealEstatesOwned	823000
CY2012	nfbk	Non Cash Or Non Cash Investment In Fhlb Stock Acquired NonCashOrNonCashInvestmentInFhlbStockAcquired	458000
CY2012	nfbk	Number Of Days Past Due For Other Consumer Loans Are Charged Off For Closed End Loans NumberOfDaysPastDueForOtherConsumerLoansAreChargedOffForClosedEndLoans	P90D
CY2012	nfbk	Other Comprehensive Income Reclassification Adjustment For Sale Of Securities Included With Otti In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedWithOttiInNetIncomeNetOfTax	-24000
CY2012	nfbk	Payments To Acquire Bank Owned Life Insurance PaymentsToAcquireBankOwnedLifeInsurance	7729000
CY2012	nfbk	Transfer Of Loans To Other Real Estate Owned TransferOfLoansToOtherRealEstateOwned	306000
CY2012	nfbk	Non Cash Or Part Non Cash Acquisition Non Cash Financial Or Equity Instrument Consideration Shares Issued Value NonCashOrPartNonCashAcquisitionNonCashFinancialOrEquityInstrumentConsiderationSharesIssuedValue	13000
CY2012	nfbk	Income Tax Reconciliation Acquisition Related Costs IncomeTaxReconciliationAcquisitionRelatedCosts	-207000
CY2012	nfbk	Agreement Term AgreementTerm	P3Y
CY2012	nfbk	Non Cash Or Part Non Cash Bank Owned Life Insurance NonCashOrPartNonCashBankOwnedLifeInsurance	4652000
CY2011Q1	us-gaap	Noninterest Income NoninterestIncome	3109000
CY2011Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	14404000
CY2011Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	21998000
CY2011Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	7560000
CY2011Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1367000
CY2011Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	15771000
CY2011Q1	us-gaap	Noninterest Expense NoninterestExpense	9953000
CY2011Q1	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.09
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	4970000
CY2011Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2590000
CY2011Q1	us-gaap	Interest Expense InterestExpense	6227000
CY2011Q2	us-gaap	Noninterest Income NoninterestIncome	2190000
CY2011Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	14079000
CY2011Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	22438000
CY2011Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6685000
CY2011Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1750000
CY2011Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	15829000
CY2011Q2	us-gaap	Noninterest Expense NoninterestExpense	9584000
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.08
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	4347000
CY2011Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2338000
CY2011Q2	us-gaap	Interest Expense InterestExpense	6609000
CY2012Q1	us-gaap	Noninterest Income NoninterestIncome	3975000
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.09
CY2012Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	16310000
CY2012Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	22739000
CY2012Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	7643000
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.10
CY2011Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	10255000
CY2012Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	615000
CY2012Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	16925000
CY2012Q1	us-gaap	Noninterest Expense NoninterestExpense	12642000
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	4948000
CY2012Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2695000
CY2012Q1	us-gaap	Interest Expense InterestExpense	5814000
CY2012Q2	us-gaap	Noninterest Income NoninterestIncome	1430000
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.07
CY2012Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	16469000
CY2012Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	22760000
CY2012Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6098000
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2012Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	544000
CY2012Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	17013000
CY2012Q2	us-gaap	Noninterest Expense NoninterestExpense	11801000
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	3948000
CY2012Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2150000
CY2012Q2	us-gaap	Interest Expense InterestExpense	5747000
CY2011Q3	us-gaap	Noninterest Income NoninterestIncome	1240000
CY2011Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	14277000
CY2011Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	22719000
CY2011Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	5731000
CY2011Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	2000000
CY2011Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	16277000
CY2011Q3	us-gaap	Noninterest Expense NoninterestExpense	9786000
CY2011Q3	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.06
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	3696000
CY2011Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2035000
CY2011Q3	us-gaap	Interest Expense InterestExpense	6442000
CY2012Q3	us-gaap	Noninterest Income NoninterestIncome	1710000
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.07
CY2012Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	16497000
CY2012Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	22690000
CY2012Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6179000
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2012Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	502000
CY2012Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	16999000
CY2012Q3	us-gaap	Noninterest Expense NoninterestExpense	12028000
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	3894000
CY2012Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2285000
CY2012Q3	us-gaap	Interest Expense InterestExpense	5691000
CY2011Q4	us-gaap	Noninterest Income NoninterestIncome	1736000
CY2011Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	23862000
CY2011Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3344000
CY2011Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	7472000
CY2011Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	17727000
CY2011Q4	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	3560000
CY2011Q4	us-gaap	Noninterest Expense NoninterestExpense	12207000
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.07
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	3810000
CY2011Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-466000
CY2011Q4	us-gaap	Interest Expense InterestExpense	6135000
CY2012Q4	us-gaap	Noninterest Income NoninterestIncome	1471000
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2012Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	16083000
CY2012Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	23350000
CY2012Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	5027000
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
CY2012Q4	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1875000
CY2012Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	17958000
CY2012Q4	us-gaap	Noninterest Expense NoninterestExpense	12527000
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	3241000
CY2012Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1786000
CY2012Q4	us-gaap	Interest Expense InterestExpense	5392000

Files In Submission

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$NFBK
Northfield Bancorp, Inc. Stock $nfbk

2012 Q4 Form 10-K Financial Statement

#000119312513112474 Filed on March 18, 2013

Income Statement

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Facts In Submission

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$NFBK Northfield Bancorp, Inc. Stock $nfbk

2012 Q4 Form 10-K Financial Statement

#000119312513112474 Filed on March 18, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NFBK
Northfield Bancorp, Inc. Stock $nfbk