Northfield Bancorp, Inc. (NFBK) 10-K 15 Mar 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 29, 2016	Jun. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Entity Registrant Name	Northfield Bancorp, Inc.
Entity Central Index Key	1,493,225
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		48,287,468
Entity Current Reporting Status	Yes
Entity Public Float			$ 607,400,542
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS:
Cash and due from banks	$ 15,324	$ 14,967
Interest-bearing deposits in other financial institutions	36,529	61,742
Total cash and cash equivalents	51,853	76,709
Trading securities	6,713	6,422
Securities available-for-sale, at estimated fair value (encumbered $65,051 at December 31, 2015 and $216,262 at December 31, 2014)	541,595	771,239
Securities held-to-maturity, (estimated fair value of $10,369 at December 31, 2015 and $3,691 at December 31, 2014) (encumbered $5,619 at December 31, 2015 and $2,114 at December 31, 2014)	10,346	3,609
Purchased credit-impaired (PCI) loans held-for-investment	33,115	44,816
Loans acquired	409,015	265,685
Originated loans held-for-investment, net	1,931,585	1,632,494
Loans held-for-investment, net	2,373,715	1,942,995
Allowance for loan losses	(24,770)	(26,292)
Net loans held-for-investment	2,348,945	1,916,703
Accrued interest receivable	8,263	8,015
Bank owned life insurance	132,782	129,015
Federal Home Loan Bank (FHLB) of New York stock, at cost	25,803	29,219
Premises and equipment, net	23,643	26,226
Goodwill	16,159	16,159
Other real estate owned	45	752
Other assets	36,437	36,801
Total assets	3,202,584	3,020,869
LIABILITIES:
Deposits	2,052,929	1,620,665
Securities sold under agreements to repurchase	63,000	203,200
Other borrowings	495,129	575,458
Advance payments by borrowers for taxes and insurance	10,862	7,792
Accrued expenses and other liabilities	20,885	19,826
Total liabilities	2,642,805	2,426,941
STOCKHOLDERS’ EQUITY:
Preferred stock, $0.01 par value; 25,000,000 shares authorized, none issued or outstanding	0	0
Common stock, $0.01 par value: 150,000,000 shares authorized, 58,226,326 shares issued at December 31, 2015 and 2014, 45,565,540 and 48,402,083 outstanding at December 31, 2015 and 2014, respectively	582	582
Additional paid-in-capital	501,540	499,606
Unallocated common stock held by employee stock ownership plan	(24,664)	(25,782)
Retained earnings	256,170	248,908
Accumulated other comprehensive loss	(2,986)	(765)
Treasury stock at cost; 12,660,786 and 9,824,243 shares at December 31, 2015 and 2014, respectively	(170,863)	(128,621)
Total stockholders’ equity	559,779	593,928
Total liabilities and stockholders’ equity	$ 3,202,584	$ 3,020,869

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Available for sale securities encumbered	$ 65,051	$ 216,262
Estimated fair value of securities held to maturity	10,369	3,691
Held to maturity securities encumbered	$ 5,619	$ 2,114
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	25,000,000	25,000,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	150,000,000	150,000,000
Common stock, shares issued (shares)	58,226,326	58,226,326
Common stock, shares outstanding (shares)	45,565,540	48,402,083
Treasury stock, shares (shares)	12,660,786	9,824,243

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest income:
Loans	$ 87,179	$ 73,407	$ 68,472
Mortgage-backed securities	12,982	16,861	21,920
Other securities	328	604	1,459
FHLB of New York dividends	1,149	772	536
Deposits in other financial institutions	120	57	83
Total interest income	101,758	91,701	92,470
Interest expense:
Deposits	10,423	5,391	6,501
Borrowings	9,265	9,961	10,447
Total interest expense	19,688	15,352	16,948
Net interest income	82,070	76,349	75,522
Provision for loan losses	353	645	1,927
Net interest income after provision for loan losses	81,717	75,704	73,595
Non-interest income:
Fees and service charges for customer services	3,945	4,073	3,182
Income on bank owned life insurance	3,767	3,902	3,607
(Losses)/gains on securities transactions, net	(339)	227	3,217
Other-than-temporary impairment losses on securities	0	0	(434)
Other	525	258	589
Total non-interest income	7,898	8,460	10,161
Non-interest expense:
Compensation and employee benefits	29,760	26,195	27,142
Occupancy	10,039	9,616	9,709
Furniture and equipment	1,428	1,636	1,751
Data processing	3,802	3,680	4,301
Professional fees	3,037	2,458	2,885
Federal Deposit Insurance Corporation (FDIC) insurance	1,550	1,306	1,432
Other	8,493	7,151	6,653
Total non-interest expense	58,109	52,042	53,873
Income before income tax expense	31,506	32,122	29,883
Income tax expense	11,975	11,856	10,736
Net income	$ 19,531	$ 20,266	$ 19,147
Net income per common share:
Net income per common share-basic (usd per share)	$ 0.46	$ 0.41	$ 0.35
Net income per common share-diluted (usd per share)	$ 0.45	$ 0.41	$ 0.34
Basic weighted average shares outstanding (in shares)	42,285,712	49,006,129	54,637,680
Diluted weighted average shares outstanding (in shares)	43,478,481	50,032,259	55,560,309
Unrealized (losses) gains on securities:
Net income	$ 19,531	$ 20,266	$ 19,147
Net unrealized holding (losses) gains on securities	(3,676)	8,535	(37,449)
Less: reclassification adjustment for net gains included in net income (included in (losses)gains on securities transactions, net)	(57)	(382)	(2,254)
Net unrealized (losses) gains	(3,733)	8,153	(39,703)
Post-retirement benefits adjustment	21	(1,689)	1,134
Reclassification adjustment for other-than-temporary impairment (OTTI) included in net income (included OTTI losses on securities)	0	0	434
Other comprehensive (loss) income, before tax	(3,712)	6,464	(38,135)
Income tax benefit (expense) related to net unrealized holding (losses) gains on securities	1,476	(3,408)	14,980
Income tax expense related to reclassification adjustment for gains included in net income	23	153	902
Income tax (expense) benefit related to post retirement benefits adjustment	(8)	676	(454)
Income tax benefit related to reclassification adjustment for OTTI impairment included in net income	0	0	(174)
Other comprehensive (loss) income, net of tax	(2,221)	3,885	(22,881)
Comprehensive income (loss)	$ 17,310	$ 24,151	$ (3,734)

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Unallocated Common Stock Held by the Employee Stock Ownership Plan	Retained Earnings	Accumulated Other Comprehensive Income (loss) Net of tax	Treasury Stock
Beginning Balance at Dec. 31, 2012	$ 414,873	$ 469	$ 230,253	$ (13,965)	$ 249,892	$ 18,231	$ (70,007)
Beginning Balance, shares at Dec. 31, 2012		41,486,819
Comprehensive income:
Net income	19,147				19,147
Other comprehensive income (loss), net of tax	(22,881)					(22,881)
Employee Stock Ownership Plan (ESOP) shares allocated or committed to be released	1,688		484	1,204
Stock compensation expense	3,349		3,349
Additional tax benefit on equity awards	296		296
Merger of Northfield Bancorp, MHC	124	$ (246)	370
Merger of Northfield Bancorp MHC, shares		(24,641,684)
Exchange of common stock		$ (169)	169
Exchanged of common stock, shares		(16,845,135)
Treasury stock retired		$ (54)	(69,953)				70,007
Proceeds of stock offering, net of costs	329,964	$ 568	329,396
Proceeds of stock offering, net of costs, shares		56,777,462
Purchase of common stock by ESOP	14	$ 14	14,224	(14,224)
Purchase of common stock by ESOP, shares		1,422,357
Exercise of stock options	21		21
Exercise of stock options, shares		26,507
Cash dividends declared	(26,859)				(26,859)
Treasury stock	(3,628)						(3,628)
Treasury stock, shares		(300,093)
Ending Balance at Dec. 31, 2013	716,108	$ 582	508,609	(26,985)	242,180	(4,650)	(3,628)
Ending Balance, shares at Dec. 31, 2013		57,926,233
Comprehensive income:
Net income	20,266				20,266
Other comprehensive income (loss), net of tax	3,885					3,885
Employee Stock Ownership Plan (ESOP) shares allocated or committed to be released	1,848		645	1,203
Stock compensation expense	2,805		2,805
Additional tax benefit on equity awards	390		390
Issuance of restricted stock			(12,633)				12,633
Issuance of restricted stock, shares		991,200
Exercise of stock options	$ 212		(210)		(654)		1,076
Exercise of stock options, shares	146,833	146,833
Cash dividends declared	$ (12,884)				(12,884)
Treasury stock	(138,702)						(138,702)
Treasury stock, shares		(10,662,183)
Ending Balance at Dec. 31, 2014	593,928	$ 582	499,606	(25,782)	248,908	(765)	(128,621)
Ending Balance, shares at Dec. 31, 2014		48,402,083
Comprehensive income:
Net income	19,531				19,531
Other comprehensive income (loss), net of tax	(2,221)					(2,221)
Employee Stock Ownership Plan (ESOP) shares allocated or committed to be released	2,128		1,010	1,118
Stock compensation expense	6,763		6,763
Additional tax benefit on equity awards	122		122
Issuance of restricted stock			(5,190)				5,190
Issuance of restricted stock, shares		387,280
Exercise of stock options	$ 158		(771)		(85)		1,014
Exercise of stock options, shares	143,171	81,789
Cash dividends declared	$ (12,184)				(12,184)
Treasury stock	(48,446)						(48,446)
Treasury stock, shares		(3,305,612)
Ending Balance at Dec. 31, 2015	$ 559,779	$ 582	$ 501,540	$ (24,664)	$ 256,170	$ (2,986)	$ (170,863)
Ending Balance, shares at Dec. 31, 2015		45,565,540

Consolidated Statements Of Cha6

Consolidated Statements Of Changes In Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Dividends declared per share	$ 0.28	$ 0.26	$ 0.49
Average cost of treasury stock per share	$ 14.66	$ 13	$ 12.09

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 19,531	$ 20,266	$ 19,147
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	353	645	1,927
ESOP and stock compensation expense	8,891	4,653	5,037
Depreciation	3,385	3,640	3,634
Amortization of premiums, and deferred loan costs, net of (accretion) of discounts, and deferred loan fees	1,800	1,695	1,949
Amortization of intangible assets	210	416	440
Income on bank owned life insurance	(3,767)	(3,902)	(3,607)
Gain on sale of premises and equipment and other real estate owned, net	(282)	0	(397)
Net gain on sale of loans held-for-sale	(4)	(79)	(60)
Proceeds from sale of loans held-for-sale	2,392	1,707	12,726
Origination of loans held-for-sale	(2,388)	(1,157)	(3,986)
Losses (gains) on securities transactions, net	339	(227)	(3,217)
Net impairment losses on securities recognized in earnings	0	0	434
Net purchases of trading securities	(687)	(579)	(358)
(Increase) decrease in accrued interest receivable	(248)	122	17
Decrease (increase) in other assets	3,359	(2,948)	978
Deferred taxes	(1,632)	(1,167)	(4,033)
Increase (decrease) in accrued expenses and other liabilities	1,059	2,625	(623)
Net cash provided by operating activities	32,311	25,710	30,008
Cash flows from investing activities:
Net increase in loans receivable	(246,562)	(267,912)	(253,145)
Purchase of loans	(186,876)	(186,475)	0
Redemption (purchase) of FHLB of New York stock, net	3,416	(11,703)	(4,966)
Purchases of securities available-for-sale	0	(436)	(289,562)
Principal payments and maturities on securities available-for-sale	173,923	161,650	331,536
Principal payments and maturities on securities held-to-maturity	870	442	0
Purchases of securities held-to-maturity	(7,657)	(4,066)	0
Proceeds from sale of securities available-for-sale	51,148	11,975	259,551
Purchase of bank owned life insurance	0	0	(28,464)
Proceeds from sale of premises and equipment and other real estate owned	918	418	519
Purchases and improvements of premises and equipment	(802)	(809)	(2,916)
Net cash (used in) provided by investing activities	(211,622)	(296,916)	12,553
Cash flows from financing activities:
Net increase (decrease) in deposits	432,264	127,976	(174,617)
Dividends paid	(12,184)	(12,884)	(26,859)
Net proceeds from sale of common stock	0	0	54,648
Merger of Northfield Bancorp, MHC	0	0	124
Purchase of common stock for Employee Stock Ownership Plan (ESOP)	0	0	(14,224)
Exercise of stock options	158	212	21
Purchase of treasury stock	(48,446)	(138,702)	(3,628)
Additional tax benefit on equity awards	122	390	296
Increase in advance payments by borrowers for taxes and insurance	3,070	1,351	2,953
Repayments under capital lease obligations	(179)	(272)	(289)
Proceeds from securities sold under agreements to repurchase and other borrowings	250,314	821,373	539,250
Repayments related to securities sold under agreements to repurchase and other borrowings	(470,664)	(512,768)	(487,758)
Net cash provided by (used in) by financing activities	154,455	286,676	(110,083)
Net (decrease) increase in cash and cash equivalents	(24,856)	15,470	(67,522)
Cash and cash equivalents at beginning of period	76,709	61,239	128,761
Cash and cash equivalents at end of period	51,853	76,709	61,239
Supplemental cash flow information:
Interest	19,738	15,002	17,177
Income taxes	10,800	16,696	16,196
Non-cash transactions:
Transfers of held-to-maturity securities to available-for-sale securities	0	0	2,200
Loans charged-off, net	1,875	390	2,314
Transfers of loans to other real estate owned	0	860	0
Other real estate owned write-downs	71	305	124
Transfers of loans to held-for-sale, at fair value	0	0	3,704
Deposits utilized to purchase common stock	$ 0	$ 0	$ 289,554

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	Summary of Significant Accounting Policies The following significant accounting and reporting policies of Northfield Bancorp, Inc. and subsidiaries (collectively, the Company), conform to U.S. generally accepted accounting principles (U.S. GAAP), and are used in preparing and presenting these consolidated financial statements. (a) Plan of Conversion and Reorganization On June 6, 2012, the Board of Trustees of Northfield Bancorp, MHC (MHC) and the Board of Directors of the Company adopted a Plan of Conversion and Reorganization (the Plan). Pursuant to the Plan, the MHC converted from the mutual holding company form of organization to the fully public form on January 24, 2013. The MHC merged into the Company, and the MHC no longer exists. The Company merged into a new Delaware corporation named Northfield Bancorp, Inc. As part of the conversion, the MHC’s ownership interest of the Company was offered for sale in a public offering. The existing publicly held shares of the Company, which represented the remaining ownership interest in the Company, were exchanged for new shares of common stock of Northfield Bancorp, Inc., the new Delaware corporation. The exchange ratio ensured that immediately after the conversion and public offering, the public shareholders of the Company owned the same aggregate percentage of Northfield Bancorp., Inc. common stock that they owned immediately prior to that time (excluding shares purchased in the stock offering and cash received in lieu of fractional shares). When the conversion and public offering was completed, all of the capital stock of Northfield Bank was owned by Northfield Bancorp, Inc., the Delaware corporation. The Plan provided for the establishment of special “liquidation accounts” for the benefit of certain depositors of Northfield Bank in an amount equal to the greater of the MHC’s ownership interest in the retained earnings of the Company as of the date of the latest balance sheet contained in the prospectus or the retained earnings of Northfield Bank at the time it reorganized into the MHC. Following the completion of the conversion, under the rules of the Board of Governors of the Federal Reserve System, Northfield Bank is not permitted to pay dividends on its capital stock to Northfield Bancorp, Inc., its sole shareholder, if Northfield Bank’s shareholder’s equity would be reduced below the amount of the liquidation accounts. The liquidation accounts will be reduced annually to the extent that eligible account holders have reduced their qualifying deposits. Subsequent increases in qualifying deposits will not restore an eligible account holder’s interest in the liquidation accounts. Direct costs of the conversion and public offering were deferred and reduced the proceeds from the shares sold in the public offering. Costs of $11.5 million were incurred related to the conversion. Share and per share amounts have been restated to reflect the completion of our second-step conversion on January 24, 2013, at a conversion ratio of 1.4029 unless noted otherwise. (b) Basis of Presentation The consolidated financial statements are comprised of the accounts of Northfield Bancorp, Inc. and its wholly owned subsidiaries, Northfield Investment, Inc. and Northfield Bank (the Bank), and the Bank’s wholly-owned significant subsidiaries, NSB Services Corp. and NSB Realty Trust. All significant intercompany accounts and transactions have been eliminated in consolidation. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheets and revenues and expenses during the reporting periods. Actual results may differ significantly from those estimates and assumptions. A material estimate that is particularly susceptible to significant change in the near term is the allowance for loan losses. In connection with the determination of this allowance, management generally obtains independent appraisals for significant properties. In addition, judgments related to the amount and timing of expected cash flows from PCI loans, goodwill, securities valuation and impairment, and deferred income taxes, involve a higher degree of complexity and subjectivity and require estimates and assumptions about highly uncertain matters. Actual results may differ from the estimates and assumptions. Certain prior year balances have been reclassified to conform to the current year presentation. (c) Business The Company, through its principal subsidiary, the Bank, provides a full range of banking services primarily to individuals and corporate customers in Richmond and Kings counties in New York, and Hunterdon, Mercer, Union and Middlesex counties in New Jersey. The Company is subject to competition from other financial institutions and to the regulations of certain federal and state agencies, and undergoes periodic examinations by those regulatory authorities. (d) Cash Equivalents Cash equivalents consist of cash on hand, due from banks, and interest-bearing deposits in other financial institutions with an original term of three months or less. (e) Securities Securities are classified at the time of purchase, based on management’s intention, as securities held-to-maturity, securities available-for-sale, or trading account securities. Securities held-to-maturity are those that management has the positive intent and ability to hold until maturity. Securities held-to-maturity are carried at amortized cost, adjusted for amortization of premiums and accretion of discounts using the level-yield method over the contractual term of the securities, adjusted for actual prepayments. Securities available-for-sale represents all securities not classified as either held-to-maturity or trading. Securities available-for-sale are carried at estimated fair value with unrealized holding gains and losses (net of related tax effects) on such securities excluded from earnings, but included as a separate component of stockholders’ equity, titled “Accumulated other comprehensive income (loss).” The cost of securities sold is determined using the specific-identification method. Security transactions are recorded on a trade-date basis. Trading securities are securities that are bought and may be held for the purpose of selling them in the near term. Trading securities are reported at estimated fair value, with unrealized holding gains and losses reported as a component of gain (loss) on securities transactions, net in non-interest income. Our evaluation of other-than-temporary impairment considers our assessments of the reason for the decline in value, the duration and severity of the impairment, our intent and ability to hold the securities (as well as the likelihood of a near-term recovery), and our intent to sell the securities and whether it is more likely than not that we will be required to sell the securities before the recovery of their amortized cost basis. If a determination is made that a debt security is other-than-temporarily impaired, the Company will estimate the amount of the unrealized loss that is attributable to credit and all other non-credit related factors. If we intend to hold securities in an unrealized loss position until the loss is recovered, which may be at maturity, the credit related component will be recognized as an other-than-temporary impairment charge in non-interest income. The non-credit related component will be recorded as an adjustment to accumulated other comprehensive income (loss), net of tax. The estimated fair value of debt securities, including mortgage-backed securities and corporate debt obligations is furnished by an independent third-party pricing service. The third-party pricing service primarily utilizes pricing models and methodologies that incorporate observable market inputs, including among other things, benchmark yields, reported trades, and projected prepayment and default rates. Management reviews the data and assumptions used in pricing the securities by its third-party provider for reasonableness. (f) Loans The accounting and reporting for PCI loans and loans transferred to held-for-sale differs substantially from those loans originated and classified by the Company as held-for-investment. For purposes of reporting, discussion and analysis, management has classified its loan portfolio into four categories: (1) loans originated by the Company and held-for-sale, which are carried at the lower of aggregate cost or estimated fair value, less costs to sell, and therefore have no associated allowance for loan losses, (2) PCI loans, which are held-for-investment, and initially valued at estimated fair value on the date of acquisition, with no initial related allowance for loan losses, (3) originated loans held-for-investment, which are carried at amortized cost, less net charge-offs and the allowance for loan losses, and (4) acquired loans with no evidence of credit deterioration, which are held-for-investment, and initially valued at an estimated fair value on the date of acquisition, with no initial related allowance for loan losses. Originated and acquired net loans held-for-investment are stated at unpaid principal balance, adjusted by unamortized premiums and unearned discounts, deferred origination fees and certain direct origination costs, and the allowance for loan losses. Interest income on loans is accrued and credited to income as earned. Net loan origination fees/costs are deferred and accreted/amortized to interest income over the loan’s contractual life using the level-yield method, adjusted for actual prepayments. Generally, loans held-for-sale are designated at time of origination and generally consist of newly originated fixed rate residential loans and are recorded at the lower of aggregate cost or estimated fair value in the aggregate. Transfers of loans from held-for-investment to held-for-sale are infrequent and occur at fair value less costs to sell, with any charge-off to allowance for loan losses. Gains are recognized on a settlement-date basis and are determined by the difference between the net sales proceeds and the carrying value of the loans, including any net deferred fees or costs. Originated and acquired net loans held-for-investment are deemed impaired when it is probable, based on current information, that the Company will not collect all amounts due in accordance with the contractual terms of the loan agreement. The Company has defined the population of originated and acquired impaired loans to be all originated and acquired non-accrual loans held-for-investment with an outstanding balance of $500,000 or greater and all loans restructured in troubled debt restructurings (TDRs). Originated and acquired impaired loans held-for-investment are individually assessed to determine that the loan’s carrying value is not in excess of the expected future cash flows, discounted at the loan's original effective interest rate, or the underlying collateral (less estimated costs to sell) if the loan is collateral dependent. Impairments, if any, are recognized through a charge to the provision for loan losses for the amount that the loan’s carrying value exceeds the discounted cash flow analysis or estimated fair value of collateral (less estimated costs to sell) if the loan is collateral dependent. Such amounts are charged-off when considered appropriate. Homogeneous loans with balances less than $500,000 , which are not considered TDRs, are collectively evaluated for impairment. The allowance for loan losses is increased by the provision for loan losses charged against income and is decreased by charge-offs, net of recoveries. Loan losses are charged-off in the period the loans, or portion thereof, are deemed uncollectible. Generally, the Company will record a loan charge-off (including a partial charge-off) to reduce a loan to the estimated fair value of the underlying collateral, less cost to sell, if it is determined that it is probable that recovery will come primarily from the sale or operation of such collateral. Specific reserves on impaired loans that are not considered collateral dependent are charged-off when such amounts are not considered to be collectible. The provision for loan losses is based on management’s evaluation of the adequacy of the allowance that considers, among other things, impaired loans held-for-investment, deterioration in PCI loans subsequent to acquisition, past loan loss experience, known and inherent risks in the portfolio, and existing adverse situations that may affect borrowers’ ability to repay. Additionally, management evaluates changes, if any, in underwriting standards, collection, charge-off and recovery practices, the nature or volume of the portfolio, lending staff, concentration of loans, as well as current economic conditions, and other relevant factors. Management believes the allowance for loan losses is adequate to provide for probable and reasonably estimable incurred losses at the date of the consolidated balance sheets. The Company also maintains an allowance for estimated losses on off-balance sheet credit risks related to loan commitments and standby letters of credit. Management utilizes a methodology similar to its allowance for loan loss adequacy methodology to estimate losses on these commitments. The allowance for estimated credit losses on off-balance sheet commitments is included in other liabilities and any changes to the allowance are recorded as a component of other non-interest expense. While management uses available information to estimate probable and reasonably estimable incurred losses on loans, future additions may be necessary based on changes in conditions, including changes in economic conditions, particularly in Richmond and Kings counties in New York, and Hunterdon, Mercer, Union and Middlesex counties in New Jersey and to a lesser extent Eastern Pennsylvania. Accordingly, as with most financial institutions in the market area, the ultimate collectability of a substantial portion of the Company’s loan portfolio is susceptible to changes in conditions in the Company’s marketplace. In addition, future changes in laws and regulations could make it more difficult for the Company to collect all contractual amounts due on its loans and mortgage-backed securities. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses. Such agencies may require the Company to recognize additions to the allowance based on their judgments about information available to them at the time of their examination. TDRs are loans where terms have been modified because of deterioration in the financial condition of the borrower. Modifications could include extension of the repayment terms of the loan, reduced interest rates, or forgiveness of accrued interest and/or principal. Once an obligation has been restructured because of such credit problems, it continues to be considered restructured until paid in full or, if the obligation yields a market rate (a rate equal to the rate the Company was willing to accept at the time of the restructuring for a new loan with comparable risk), until the year subsequent to the year in which the restructuring takes place, provided the borrower has performed under the modified terms for a six-month period. The Company records an impairment charge equal to the difference between the present value of estimated future cash flows under the restructured terms discounted at the original loan’s effective interest rate, or the underlying collateral value less costs to sell, if the loan is collateral dependent. Changes in present values attributable to the passage of time are recorded as a component of the provision for loan losses. A loan is considered past due when it is not paid in accordance with its contractual terms. The accrual of income on loans, including impaired loans held-for-investment, and other loans in the process of foreclosure, is generally discontinued when a loan becomes 90 days or more delinquent, or sooner when certain factors indicate that the ultimate collection of principal and interest is in doubt. Loans on which the accrual of income has been discontinued are designated as non-accrual loans. All previously accrued interest is reversed against interest income, and income is recognized subsequently only in the period that cash is received, provided no principal payments are due and the remaining principal balance outstanding is deemed collectible. A non-accrual loan is not returned to accrual status until both principal and interest payments are brought current and factors indicating doubtful collection no longer exist, including performance by the borrower under the loan terms for a consecutive six-month period. The Company accounts for the PCI loans based on expected cash flows. In accordance with current accounting guidance, the Company will maintain the integrity of a pool of multiple loans accounted for as a single asset and evaluate the pools for impairment, and accrual status, based on variances from the expected cash flows. (g) Federal Home Loan Bank Stock The Bank, as a member of the Federal Home Loan Bank (FHLB) of New York, is required to hold shares of capital stock in the FHLB as a condition to both becoming a member and engaging in certain transactions with the FHLB. The minimum investment requirement is determined by a “membership” investment component and an “activity-based” investment component. The membership investment component is the greater of 0.20% of the Bank’s mortgage-related assets, as defined by the FHLB, or $1,000 . The activity-based investment component is equal to 4.5% of the Bank’s outstanding advances with the FHLB. The activity-based investment component also considers other transactions, including assets originated for or sold to the FHLB, and delivery commitments issued by the FHLB. The Company currently does not enter into these other types of transactions with the FHLB. On a quarterly basis, we perform our other-than-temporary impairment analysis of FHLB stock, we evaluate, among other things, (i) its earnings performance, including the significance of any decline in net assets of the FHLB as compared to the regulatory capital amount of the FHLB, (ii) the commitment by the FHLB to continue dividend payments, and (iii) the liquidity position of the FHLB. We did not consider our investment in FHLB stock to be other-than-temporarily impaired at December 31, 2015 , and 2014 . (h) Premises and Equipment, Net Premises and equipment, including leasehold improvements, are carried at cost, less accumulated depreciation and amortization. Depreciation and amortization of premises and equipment, including capital leases, are computed on a straight-line basis over the estimated useful lives of the related assets. The estimated useful lives of significant classes of assets are generally as follows: buildings - forty years; furniture and equipment - five to seven years; and purchased computer software - three years. Leasehold improvements are amortized over the shorter of the term of the related lease or the estimated useful lives of the improvements. Major improvements are capitalized, while repairs and maintenance costs are charged to operations as incurred. Upon retirement or sale, any gain or loss is credited or charged to operations. (i) Bank Owned Life Insurance The Company has purchased bank owned life insurance contracts to help fund its obligations for certain employee benefit costs. The Company’s investment in such insurance contracts has been reported in the consolidated balance sheets at their cash surrender values. Changes in cash surrender values and death benefit proceeds received in excess of the related cash surrender values are recorded as non-interest income. (j) Goodwill Intangible assets resulting from acquisitions under the purchase method of accounting consist of goodwill and other intangible assets. Goodwill is not amortized and is subject to an annual assessment for impairment. The goodwill impairment analysis is generally a two-step test. However, under current accounting guidance, first we may assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. Under current accounting guidance, we are not required to calculate the fair value of a reporting unit if, based on a qualitative assessment, we determine that it was more likely than not that the unit’s fair value was not less than its carrying amount. During 2015 , we elected to perform step one of the two-step goodwill impairment test for our reporting unit, but we may choose to perform the optional quantitative assessment in future periods. Goodwill is allocated to Northfield’s reporting unit at the date goodwill is actually recorded. If the carrying value of a reporting unit exceeds its estimated fair value, a second step in the analysis is performed to determine the amount of impairment, if any. The second step compares the implied fair value of the reporting unit’s goodwill with the carrying amount of that goodwill. If the carrying value of a reporting unit exceeds the implied fair value of the goodwill, an impairment charge is recorded equal to the excess amount in the current period earnings. As of December 31, 2015 , the carrying value of goodwill totaled $16.2 million . The Company performed its annual goodwill impairment test, as of December 31, 2015 , and determined that the fair value of the Company’s single reporting unit to be in excess of its carrying value. The Company will test goodwill for impairment between annual test dates if an event occurs or circumstances change that would indicate the fair value of the reporting unit is below its carrying amount. No events have occurred and no circumstances have changed since the annual impairment test date that would indicate the fair value of the reporting unit is below its carrying amount. (k) Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply in the year in which those temporary differences are expected to be recovered or settled. When applicable, deferred tax assets are reduced by a valuation allowance for any portions determined not likely to be realized. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Income tax benefits are recognized and measured based upon a two-step model: 1) a tax position must be more-likely-than-not to be sustained based solely on its technical merits in order to be recognized, and 2) the benefit is measured as the largest dollar amount of that position that is more-likely-than-not to be sustained upon settlement. The difference between the benefit recognized and the tax benefit claimed on a tax return is referred to as an unrecognized tax benefit. The Company records income tax-related interest and penalties, if applicable, within income tax expense. (l) Impairment of Long-Lived Assets Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future undiscounted (and without interest) net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less costs to sell. (m) Securities Sold Under Agreements to Repurchase and Other Borrowings The Company enters into sales of securities under agreements to repurchase (Repurchase Agreements) and collateral pledge agreements (Pledge Agreements) with selected dealers and banks. Such agreements are accounted for as secured financing transactions since the Company maintains effective control over the transferred or pledged securities and the transfer meets the other accounting and recognition criteria as required by the transfer and servicing topic of the Financial Accounting Standards Board (FASB) Accounting Standards. Obligations under these agreements are reflected as a liability in the consolidated balance sheets. Securities underlying the agreements are maintained at selected dealers and banks as collateral for each transaction executed and may be sold or pledged by the counterparty. Collateral underlying Repurchase Agreements that permit the counterparty to sell or pledge the underlying collateral is disclosed on the consolidated balance sheets as “encumbered.” The Company retains the right under all Repurchase Agreements and Pledge Agreements to substitute acceptable collateral throughout the terms of the agreement. (n) Comprehensive Income (Loss) Comprehensive income (loss) includes net income and the change in unrealized holding gains and losses on securities available-for-sale, change in actuarial gains and losses on other post retirement benefits, and change in service cost on other postretirement benefits, net of taxes. Comprehensive income (loss) is presented in the Consolidated Statements of Comprehensive Income (Loss). (o) Benefits The Company sponsors a defined postretirement benefit plan that provides for medical and life insurance coverage to a limited number of retirees, as well as life insurance to all qualifying employees of the Company. The estimated cost of postretirement benefits earned is accrued during an individual’s estimated service period to the Company. The Company recognizes in its balance sheet the over-funded or under-funded status of a defined benefit postretirement plan measured as the difference between the fair value of plan assets and the benefit obligation at the end of our calendar year. The actuarial gains and losses and the prior service costs and credits that arise during the period are recognized as a component of other comprehensive income (loss), net of tax. 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. The Company’s common stock not yet allocated to participants is recorded as a reduction of stockholders’ equity at cost. The Company records compensation expense related to the ESOP at an amount equal to the shares committed to be released by the ESOP multiplied by the average fair value of our common stock during the reporting period. The Company recognizes the grant-date fair value of stock based awards issued to participants' as compensation cost in the consolidated statements of comprehensive income (loss). The fair value of common stock awards is based on the closing price of our common stock as reported on the NASDAQ Stock Market on the grant date. The expense related to stock options is based on the estimated fair value of the options at the date of the grant using the Black-Scholes pricing model. The awards are fixed in nature and compensation cost related to stock based awards is recognized on a straight-line basis over the requisite service periods. The Bank has a 401(k) plan covering substantially all employees. Contributions to the plan are expensed as incurred. (p) Segment Reporting As a community-focused financial institution, substantially all of the Company’s operations involve the delivery of loan and deposit products to customers. Management makes operating decisions and assesses performance based on an ongoing review of these community banking operations, which constitute the Company’s only operating segment for financial reporting purposes. (q) Net Income per Common Share Net income per common share-basic is computed by dividing the net income available to common stockholders by the weighted average number of common shares outstanding, excluding unallocated ESOP shares and unearned common stock award shares. The weighted average common shares outstanding includes the average number of shares of common stock outstanding, including shares allocated or committed to be released ESOP shares. Net income per common share-diluted is computed using the same method as basic earnings per share, but reflects the potential dilution that could occur if stock options and unvested shares of restricted stock were exercised and converted into common stock. These potentially dilutive shares are included in the weighted average number of shares outstanding for the period using the treasury stock method. When applying the treasury stock method, we add: (1) the assumed proceeds from option exercises; (2) the tax benefit, if any, that would be credited to additional paid-in capital assuming exercise of non-qualified stock options and vesting of shares of restricted stock; and (3) the average unamortized compensation costs related to unvested shares of restricted stock and stock options. We then divide this sum by our average stock price for the period to calculate assumed shares repurchased. The excess of the number of shares issuable over the number of shares assumed to be repurchased is added to basic weighted average common shares to calculate diluted earnings per share. At December 31, 2015 , 2014 , and 2013 , there were 1,192,769 , 1,026,130 and 922,629 dilutive shares outstanding, respectively. (r) Other Real Estate Owned Assets acquired through loan foreclosure, or deed-in-lieu of, are held for sale and are initially recorded at estimated fair value less estimated selling costs when acquired, thus establishing a new cost basis. Costs after acquisition are generally expensed. If the estimated fair value of the asset subsequently declines, a write-down is recorded through other non-interest expense. (s) Recent Accounting Developments In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02, Leases (Topic 842), which is intended to increase transparency and comparability of accounting for lease transactions. The ASU will require all leases to be recognized on the balance sheet as lease assets and lease liabilities and will require both quantitative and qualitative disclosures regarding key information about leasing arrangements. Lessor accounting is largely unchanged. The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that reporting period. The Company is currently evaluating the potential effect of adoption of this pronouncement on its consolidated financial statements. In January 2016, In January 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , which addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The guidance primarily affects the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. In addition, the FASB clarified guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. The accounting for other financial instruments, such as loans, investments in debt securities, and financial liabilities is largely unchanged. ASU No. 2016-01 is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The adoption of this pronouncement is not expected to have a material effect on the Company's consolidated financial statements. In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805) - Simplifying the Accounting for Measurement-Period Adjustments, which requires that adjustments to provisional amounts that are identified during the measurement period of a business combination be recognized in the reporting period in which the adjustment amounts are determined. Furthermore, the income st

Securities Available-For-Sale

Securities Available-For-Sale	12 Months Ended
	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Securities Available-For-Sale	Securities Available-for-Sale The following is a comparative summary of mortgage-backed securities and other securities available-for-sale at December 31, 2015 and 2014 (in thousands): 2015 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises (GSE) $ 228,557 $ 4,673 $ 1,530 $ 231,700 Real estate mortgage investment conduits (REMICs): GSE 305,387 647 8,210 297,824 Non-GSE 597 — 18 579 534,541 5,320 9,758 530,103 Other securities: Equity investments-mutual funds 481 — — 481 Corporate bonds 11,002 9 — 11,011 11,483 9 — 11,492 Total securities available-for-sale $ 546,024 $ 5,329 $ 9,758 $ 541,595 2014 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: GSE $ 292,162 $ 8,309 $ 1,131 $ 299,340 REMICs: GSE 408,328 1,314 9,192 400,450 Non-GSE 1,060 — 34 1,026 701,550 9,623 10,357 700,816 Other securities: Equity investments-mutual funds 410 — — 410 Corporate bonds 69,975 40 2 70,013 70,385 40 2 70,423 Total securities available-for-sale $ 771,935 $ 9,663 $ 10,359 $ 771,239 The following is a summary of the expected maturity distribution of debt securities available-for-sale other than mortgage-backed securities at December 31, 2015 (in thousands): Available-for-sale Amortized cost Estimated fair value Due in one year or less $ 11,002 $ 11,011 Due after one year through five years — — $ 11,002 $ 11,011 Expected maturities on mortgage-backed securities will differ from contractual maturities as borrowers may have the right to call or prepay obligations with or without penalties. Certain securities available-for-sale are pledged or encumbered to secure borrowings under Pledge Agreements and Repurchase Agreements and for other purposes required by law. At December 31, 2015 , and December 31, 2014 , securities available-for-sale with a carrying value of $35.9 million and $13.8 million , respectively, were pledged to secure deposits. See Note 7 for further discussion regarding securities pledged or encumbered for borrowings. For the year ended December 31, 2015 , the Company had gross proceeds of $51.1 million on sales of securities available-for-sale with gross realized gains of approximately $60,000 and gross realized losses of approximately $3,000 . For the year ended December 31, 2014 , the Company had gross proceeds of $12.0 million on sales of securities available-for-sale with gross realized gains and gross realized losses of approximately $382,000 and no gross realized losses. For the year ended December 31, 2013 , the Company had gross proceeds of $259.6 million on sales of securities available-for-sale with gross realized gains and gross realized losses of approximately $3.1 million and $128,000 , respectively. The Company routinely sells securities when market pricing presents, in management’s assessment, an economic benefit that outweighs holding such security, and when smaller balance securities become cost prohibitive to carry. The Company did not recognize any other-than-temporary impairment charges in earnings during the years ended December 31, 2015 and December 31, 2014 . The Company recognized in earnings other-than-temporary impairment charges of $434,000 during the year ended December 31, 2013 , related to one equity investment in a mutual fund. No portion of the other-than-temporary impairment was recognized in accumulated other comprehensive income. Gross unrealized losses on mortgage-backed securities, equity securities, agency bonds, and corporate bonds available-for-sale, and the estimated fair value of the related securities, aggregated by security category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2015 and 2014 , were as follows (in thousands): December 31, 2015 Less than 12 months 12 months or more Total Unrealized Estimated Unrealized Estimated Unrealized Estimated losses fair value losses fair value losses fair value Mortgage-backed securities: Pass-through certificates: GSE $ 115 $ 14,424 $ 1,415 $ 52,120 $ 1,530 $ 66,544 REMICs: GSE 338 31,937 7,872 164,666 8,210 196,603 Non-GSE 18 579 18 579 Total $ 453 $ 46,361 $ 9,305 $ 217,365 $ 9,758 $ 263,726 December 31, 2014 Less than 12 months 12 months or more Total Unrealized Estimated Unrealized Estimated Unrealized Estimated losses fair value losses fair value losses fair value Mortgage-backed securities: Pass-through certificates: GSE $ 1 $ 181 $ 1,130 $ 61,526 $ 1,131 $ 61,707 REMICs: GSE 30 3,179 9,162 229,896 9,192 233,075 Non-GSE — — 34 1,026 34 1,026 Other securities: Corporate bonds 2 9,996 — — 2 9,996 Total $ 33 $ 13,356 $ 10,326 $ 292,448 $ 10,359 $ 305,804 The Company held 10 pass-through mortgage-backed securities issued or guaranteed by GSEs, 11 REMIC mortgage-backed securities issued or guaranteed by GSEs, and two REMIC mortgage-backed securities not issued or guaranteed by GSEs that were in a continuous unrealized loss position of greater than twelve months at December 31, 2015 . There were 14 pass-through mortgage-backed securities issued or guaranteed by GSEs and three REMIC mortgage-backed securities issued or guaranteed by GSEs that were in an unrealized loss position of less than twelve months, and rated investment grade at December 31, 2015 . The declines in value relate to the general interest rate environment and are considered temporary. The securities cannot be prepaid in a manner that would result in the Company not receiving all of its amortized cost. The Company neither has an intent to sell, nor is it more likely than not that the Company will be required to sell, the securities before the recovery of their amortized cost basis or, if necessary, maturity. The fair values of our investment securities could decline in the future if the underlying performance of the collateral for the collateralized mortgage obligations or other securities deteriorates and our credit enhancement levels do not provide sufficient protections to our contractual principal and interest. As a result, there is a risk that significant other-than-temporary impairments may occur in the future given the current economic environment.

Securities Held-To-Maturity

Securities Held-To-Maturity	12 Months Ended
	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Securities Held-To-Maturity	Securities Held-to-Maturity The following is a summary of mortgage-backed securities held-to-maturity at December 31, 2015 (in thousands): 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 10,346 $ 53 $ 30 $ 10,369 Total securities held-to-maturity $ 10,346 $ 53 $ 30 $ 10,369 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 3,609 $ 82 $ — $ 3,691 Total securities held-to-maturity $ 3,609 $ 82 $ — $ 3,691 Contractual maturities for mortgage-backed securities are not presented, as expected maturities on mortgage-backed securities will differ from contractual maturities as borrowers may have the right to call or prepay obligations with or without penalties. The Company had no held-to-maturity securities at December 31, 2015 or December 31, 2014 that were in an unrealized loss position. The fair values of our investment securities could decline in the future if the underlying performance of the collateral for the collateralized mortgage obligations or other securities deteriorates and our credit enhancement levels do not provide sufficient protections to our contractual principal and interest. As a result, there is a risk that significant other-than-temporary impairments may occur in the future given the current economic environment.

Loans

Loans	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Loans	Loans Loans held-for-investment, net, consists of the following (in thousands): December 31, 2015 2014 Real estate loans: Multifamily $ 1,318,461 $ 1,072,193 Commercial mortgage 402,073 390,288 One-to-four family residential mortgage 98,332 74,401 Home equity and lines of credit 61,413 54,533 Construction and land 18,652 21,412 Total real estate loans 1,898,931 1,612,827 Commercial and industrial loans 25,554 12,945 Other loans 2,256 2,157 Total commercial and industrial and other loans 27,810 15,102 Deferred loan cost, net 4,844 4,565 Originated loans held-for-investment, net 1,931,585 1,632,494 PCI Loans 33,115 44,816 Loans acquired: One-to-four family residential mortgage 330,672 234,478 Multifamily 64,779 18,844 Commercial mortgage 11,160 11,999 Home equity and lines of credit 2,404 — Construction and land — 364 Total loans acquired 409,015 265,685 Loans held for investment, net 2,373,715 1,942,995 Allowance for loan losses (24,770 ) (26,292 ) Net loans held-for-investment $ 2,348,945 $ 1,916,703 The Company had no loans held-for-sale at December 31, 2015 or December 31, 2014 . PCI loans, primarily acquired as part of a FDIC-assisted transaction, totaled $33.1 million at December 31, 2015 , as compared to $ 44.8 million at December 31, 2014 . The Company accounts for PCI loans utilizing U.S. GAAP applicable to loans acquired with deteriorated credit quality. At December 31, 2015 , PCI loans consist of approximately 28% commercial real estate loans and 52% commercial and industrial loans, with the remaining balance in residential and home equity loans. At December 31, 2014 , PCI loans consist of approximately 33% commercial real estate loans and 53% commercial and industrial loans, with the remaining balance in residential and home equity loans. The following details the accretable yield (in thousands): For The Year Ended December 31, 2015 2014 Balance at the beginning of year $ 27,943 $ 32,464 Accretable yield at purchase date — — Accretion into interest income (4,525 ) (4,895 ) Net reclassification (to)/from non-accretable difference (1) (565 ) 374 Balance at end of year $ 22,853 $ 27,943 (1) Due to re-casting of cash flows for loan pools acquired in the 2011 FDIC-assisted transaction. The Company does not have any lending programs commonly referred to as subprime lending. Subprime lending generally targets borrowers with weakened credit histories typically characterized by payment delinquencies, previous charge-offs, judgments, bankruptcies, or borrowers with questionable repayment capacity as evidenced by low credit scores or high debt-burden ratios. We provide for loan losses based on the consistent application of our documented allowance for loan loss methodology. Loan losses are charged to the allowance for loans losses and recoveries are credited to it. Additions to the allowance for loan losses are provided by charges against income based on various factors which, in our judgment, deserve current recognition in estimating incurred losses. Loan losses are charged-off in the period the loans, or portion thereof, are deemed uncollectible. Generally, the Company will record a loan charge-off (including a partial charge-off) to reduce a loan to the estimated fair value of the underlying collateral, less cost to sell, for collateral dependent loans. We regularly review the loan portfolio in order to maintain the allowance for loan losses in accordance with U.S. GAAP. At December 31, 2015 and 2014 , the allowance for loan losses related to loans held-for-investment (excluding PCI loans) consisted primarily of the following two components: (1) Specific allowances are established for impaired loans (generally defined by the Company as non-accrual loans with an outstanding balance of $ 500,000 or greater and all loans restructured in troubled debt restructurings). The amount of impairment, if any, provided for as a specific reserve determined by the deficiency, if any, between the present value of expected future cash flows discounted at the original loan’s effective interest rate or the underlying collateral value (less estimated costs to sell,) if the loan is collateral dependent, and the carrying value of the loan. Impaired loans that have no impairment losses are not considered for general allowances described below. Generally, the Company charges down a loan to the estimated fair value of the underlying collateral, less costs to sell for collateral dependent loans and, if necessary, maintains a specific reserve in the allowance for loan losses related to cash flow dependent impaired loans where the present value of the expected future cash flows, discounted at the loan’s original contractual interest rate, is less than the carrying value of the loan unless management determines that such shortfall should be charged off. (2) General allowances are established for loan losses on a portfolio basis for loans that do not meet the definition of impaired. The portfolio is grouped into similar risk characteristics, primarily loan type, loan-to-value, if collateral dependent, and internal credit risk ratings. We apply an estimated loss rate to each loan group. The loss rates applied are based on our net loss experience (using appropriate look-back and loss emergence periods) as adjusted, if appropriate, for our qualitative assessment of factors which may not be fully captured in our historical quantitative net loss rates related to: • changes in lending policies and procedures • changes in local, regional, national, and international economic and business conditions and developments that affect the collectability of our portfolio, including the condition of various market segments; • changes in the nature and volume of our portfolio and in the terms of our loans; • changes in the experience, ability and depth of lending management and other relevant staff; • changes in the volume and severity of past due loans, the volume of nonaccrual loans, and the volume and severity of adversely classified or graded loans; • changes in the quality of our loan review system; • changes in the value of underlying collateral for collateral-dependent loans; • the existence and effect of any concentrations of credit, and changes in the level of such concentrations; and • the effect of other external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in our existing portfolio. The loss emergence period is the estimated time from the date of the loss event to the actual recognition of the loss (typically the first charge-off), and is determined based upon a study of the Company's past loss experience by loan groups. This evaluation is inherently subjective, as it requires material estimates that may be susceptible to significant revisions based upon changes in economic and real estate market conditions. Actual loan losses may be significantly more than the allowance for loan losses we have established, which could have a material negative effect on our financial results. We also maintain an amount identified as the unallocated component related to indicators of loans losses not fully captured in other components of the allowance for loan losses methodology, as well as for the inherent imprecision of the loss estimation process. Additionally, held-for-investment loans acquired with no evidence of credit deterioration are initially valued at an estimated fair value on the date of acquisition, with no initial related allowance for loan losses. These loans are evaluated for impairment on a quarterly basis as part of our analysis of the allowance for loan losses. In underwriting a loan secured by real property, we require an appraisal (or an automated valuation model) of the property by an independent licensed appraiser approved by the Company’s board of directors. The appraisal is subject to review by an independent third-party hired by the Company. We review and inspect properties before disbursement of funds during the term of a construction loan. Generally, management obtains updated appraisals when a loan is deemed impaired, or sooner if management deems it appropriate. These appraisals may be more limited than those prepared for the underwriting of a new loan. In addition, when the Company acquires other real estate owned, it generally obtains a current appraisal to substantiate the net carrying value of the asset. We evaluate the allowance for loan losses based on the combined total of the impaired and general components for loans. Generally when the loan portfolio increases, absent other factors, our allowance for loan loss methodology results in a higher dollar amount of estimated probable losses. Conversely, when the loan portfolio decreases, absent other factors, our allowance for loan loss methodology results in a lower dollar amount of estimated probable losses. Each quarter we evaluate the allowance for loan losses and adjust the allowance as appropriate through a provision for loan losses. While we use the best information available to make evaluations, future adjustments to the allowance may be necessary if conditions differ substantially from the information used in making the evaluations. In addition, as an integral part of their examination process, the Office of the Comptroller of the Currency (OCC) will periodically review the allowance for loan losses. The OCC may require us to adjust the allowance based on their analysis of information available to them at the time of their examination. A summary of changes in the allowance for loan losses for the years ended December 31, 2015 , 2014 , and 2013 follows (in thousands): December 31, 2015 2014 2013 Balance at beginning of year $ 26,292 $ 26,037 $ 26,424 Provision for loan losses 353 645 1,927 Recoveries 140 402 860 Charge-offs (2,015 ) (792 ) (3,174 ) Balance at end of year $ 24,770 $ 26,292 $ 26,037 The following table sets forth activity in our allowance for loan losses, by loan type, for the years ended December 31, 2015 and 2014 . The following table also details the amount of loans receivable held-for-investment, net of deferred loan fees and costs, that are evaluated individually, and collectively, for impairment, and the related portion of allowance for loan losses that is allocated to each loan portfolio segment (in thousands): December 31, 2015 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Unallocated Originated Loans Total PCI Acquired Loans Total Allowance for loan losses: Beginning Balance $ 9,309 $ 951 $ 266 $ 12,219 $ 901 $ 841 $ 134 $ 1,209 $ 25,830 $ 400 $ 62 $ 26,292 Charge-offs (1,431 ) (277 ) — (120 ) (115 ) (71 ) (1 ) — (2,015 ) — — (2,015 ) Recoveries 2 20 — 25 42 34 17 — 140 — — 140 Provisions (credit) (774 ) 93 (5 ) 263 (33 ) 484 5 (116 ) (83 ) 383 53 353 Ending Balance $ 7,106 $ 787 $ 261 $ 12,387 $ 795 $ 1,288 $ 155 $ 1,093 $ 23,872 $ 783 $ 115 $ 24,770 Ending balance: individually evaluated for impairment $ 394 $ 167 $ — $ 158 $ 51 $ 4 $ — $ — $ 774 $ — $ 115 $ 889 Ending balance: collectively evaluated for impairment $ 6,712 $ 620 $ 261 $ 12,229 $ 744 $ 1,284 $ 155 $ 1,093 $ 23,098 $ 783 $ — $ 23,881 Loans, net: Ending Balance $ 402,714 $ 99,010 $ 18,677 $ 1,320,724 $ 62,594 $ 25,610 $ 2,256 $ — $ 1,931,585 $ 33,115 $ 409,015 $ 2,373,715 Ending balance: individually evaluated for impairment $ 20,465 $ 2,344 $ — $ 2,458 $ 354 $ 116 $ — $ — $ 25,737 $ — $ 3,250 $ 28,987 Ending balance: collectively evaluated for impairment $ 382,249 $ 96,666 $ 18,677 $ 1,318,266 $ 62,240 $ 25,494 $ 2,256 $ — $ 1,905,848 $ 33,115 $ 405,765 $ 2,344,728 December 31, 2014 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Unallocated Originated Loans Total PCI Acquired Loans Total Allowance for loan losses: Beginning Balance $ 12,619 $ 875 $ 205 $ 9,374 $ 860 $ 425 $ 67 $ 1,024 $ 25,449 $ 588 $ — $ 26,037 Charge-offs (103 ) (58 ) — (7 ) (489 ) (135 ) — — (792 ) — — (792 ) Recoveries 72 — 246 35 — 8 41 — 402 — — 402 Provisions (credit) (3,279 ) 134 (185 ) 2,817 530 543 26 185 771 (188 ) 62 645 Ending Balance $ 9,309 $ 951 $ 266 $ 12,219 $ 901 $ 841 $ 134 $ 1,209 $ 25,830 $ 400 $ 62 $ 26,292 Ending balance: individually evaluated for impairment $ 2,361 $ 57 $ — $ 215 $ 13 $ 109 $ — $ — $ 2,755 $ — $ 62 $ 2,817 Ending balance: collectively evaluated for impairment $ 6,948 $ 894 $ 266 $ 12,004 $ 888 $ 732 $ 134 $ 1,209 $ 23,075 $ 400 $ — $ 23,475 Loans, net: Ending Balance $ 390,885 $ 74,990 $ 21,445 $ 1,074,539 $ 55,486 $ 12,992 $ 2,157 $ — $ 1,632,494 $ 44,816 $ 265,685 $ 1,942,995 Ending balance: individually evaluated for impairment $ 29,224 $ 1,072 $ — $ 1,990 $ 327 $ 806 $ — $ — $ 33,419 $ — $ 855 $ 34,274 Ending balance: collectively evaluated for impairment $ 361,661 $ 73,918 $ 21,445 $ 1,072,549 $ 55,159 $ 12,186 $ 2,157 $ — $ 1,599,075 $ 44,816 $ 264,830 $ 1,908,721 The Company monitors the credit quality of its loan portfolio on a regular basis. Credit quality is monitored by reviewing certain credit quality indicators. Management has determined that loan-to-value ratios (at period end) and internally assigned credit risk ratings by loan type are the key credit quality indicators that best measure the credit quality of the Company’s loan receivables. Loan-to-value (LTV) ratios used by management in monitoring credit quality are based on current period loan balances and original appraised values at time of origination (unless a current appraisal has been obtained as a result of the loan being deemed impaired). In calculating the provision for loan losses, based on past loan loss experience, management has determined that commercial real estate loans and multifamily loans having loan-to-value ratios, as described above, of less than 35% , and one-to-four family loans having loan-to-value ratios, as described above, of less than 60% , require less of a loss factor than those with higher loan to value ratios. The Company maintains a credit risk rating system as part of the risk assessment of its loan portfolio. The Company’s lending officers are required to assign a credit risk rating to each loan in their portfolio at origination. This risk rating is reviewed periodically and adjusted if necessary. Monthly, management presents monitored assets to the loan committee. In addition, the Company engages a third-party independent loan reviewer that performs semi-annual reviews of a sample of loans, validating the credit risk ratings assigned to such loans. The credit risk ratings play an important role in the establishment of the loan loss provision and the allowance for loan losses for originated loans held-for-investment. After determining the general reserve loss factor for each originated portfolio segment held-for-investment, the originated portfolio segment held-for-investment balance collectively evaluated for impairment is multiplied by the general reserve loss factor for the respective portfolio segment in order to determine the general reserve. When assigning a risk rating to a loan, management utilizes the Bank’s internal nine-point credit risk rating system. 1. Strong 2. Good 3. Acceptable 4. Adequate 5. Watch 6. Special Mention 7. Substandard 8. Doubtful 9. Loss Loans rated 1 to 5 are considered pass ratings. An asset is classified substandard if it is inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Substandard assets have well defined weaknesses based on objective evidence, and are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Assets classified as doubtful have all of the weaknesses inherent in those classified substandard with the added characteristic that the weaknesses present make collection or liquidation in full highly questionable and improbable based on current circumstances. Assets classified as loss are those considered uncollectible and of such little value that their continuance as assets is not warranted. Assets which do not currently expose the Company to sufficient risk to warrant classification in one of the aforementioned categories, but possess weaknesses, are required to be designated special mention. The following table details the recorded investment of originated loans receivable held-for-investment, net of deferred fees and costs, by loan type and credit quality indicator at December 31, 2015 and 2014 (in thousands): At December 31, 2015 Real Estate Multifamily Commercial One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total < 35% LTV => 35% LTV < 35% LTV => 35% LTV < 60% LTV => 60% LTV Internal Risk Rating Pass $ 124,678 $ 1,188,916 $ 52,253 $ 319,733 $ 48,429 $ 46,578 $ 18,677 $ 61,935 $ 24,846 $ 2,256 $ 1,888,301 Special Mention 51 3,832 974 2,966 504 — — 75 316 — 8,718 Substandard 775 2,472 1,233 25,555 2,112 1,387 — 584 448 — 34,566 Originated loans held-for-investment, net $ 125,504 $ 1,195,220 $ 54,460 $ 348,254 $ 51,045 $ 47,965 $ 18,677 $ 62,594 $ 25,610 $ 2,256 $ 1,931,585 At December 31, 2014 Real Estate Multifamily Commercial One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total < 35% LTV => 35% LTV < 35% LTV => 35% LTV < 60% LTV => 60% LTV Internal Risk Rating Pass $ 64,692 $ 999,708 $ 47,534 $ 289,794 $ 29,629 $ 40,527 $ 21,445 $ 54,935 $ 11,421 $ 2,157 $ 1,561,842 Special Mention 283 4,342 2,436 9,792 1,143 — — 360 652 — 19,008 Substandard 801 4,713 — 41,329 2,303 1,388 — 191 919 — 51,644 Originated loans held-for-investment, net $ 65,776 $ 1,008,763 $ 49,970 $ 340,915 $ 33,075 $ 41,915 $ 21,445 $ 55,486 $ 12,992 $ 2,157 $ 1,632,494 Included in loans receivable are loans for which the accrual of interest income has been discontinued due to deterioration in the financial condition of the borrowers. The recorded investment of these nonaccrual loans was $8.8 million and $13.9 million at December 31, 2015 , and December 31, 2014 , respectively. Generally, originated loans are placed on non-accruing status when they become 90 days or more delinquent, or sooner if considered appropriate by management, and remain on non-accrual status until they are brought current, have six consecutive months of performance under the loan terms, and factors indicating reasonable doubt about the timely collection of payments no longer exist. Therefore, loans may be current in accordance with their loan terms, or may be less than 90 days delinquent and still be on a non-accruing status. Non-accrual amounts include loans deemed to be impaired of $6.7 million and $10.1 million at December 31, 2015 , and December 31, 2014 , respectively. Loans on non-accrual status with principal balances less than $500,000 , and therefore not meeting the Company’s definition of an impaired loan, amounted to $2.1 million at December 31, 2015 , and $3.8 million at December 31, 2014 . There were no loans held-for-sale at December 31, 2015 , and December 31, 2014 . Loans past due ninety days or more and still accruing interest were $15,000 and $708,000 at December 31, 2015 , and December 31, 2014 , respectively, and consisted of loans that are well secured and in the process of collection. The following table sets forth the detail, and delinquency status, of originated and acquired non-performing loans (non-accrual loans and loans past due ninety days or more and still accruing), net of deferred fees and costs, at December 31, 2015 and 2014 (in thousands), excluding PCI loans which have been segregated into pools. For PCI loans, each loan pool is accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows. At December 31, 2015 Total Non-Performing Loans Non-Accruing Loans 0-29 Days Past Due 30-89 Days Past Due 90 Days or More Past Due Total 90 Days or More Past Due and Accruing Total Non-Performing Loans Loans held-for-investment: Real estate loans: Commercial LTV => 35% Substandard 344 372 4,516 5,232 — 5,232 Total 344 372 4,516 5,232 — 5,232 Total commercial 344 372 4,516 5,232 — 5,232 One-to-four family residential LTV < 60% Substandard 364 180 565 1,109 — 1,109 Total 364 180 565 1,109 — 1,109 LTV => 60% Substandard 901 135 — 1,036 — 1,036 Total 901 135 — 1,036 — 1,036 Total one-to-four family residential 1,265 315 565 2,145 — 2,145 Construction and land Pass — — 113 113 — 113 Total construction and land — — 113 113 — 113 Multifamily LTV => 35% Substandard — — 559 559 — 559 Total multifamily — — 559 559 — 559 Home equity and lines of credit Substandard — — 329 329 — 329 Total home equity and lines of credit — — 329 329 — 329 Commercial and industrial loans Pass — — — — 15 15 Total commercial and industrial loans — — — — 15 15 Total non-performing loans held-for-investment 1,609 687 6,082 8,378 15 8,393 Loans acquired: One-to-four family residential LTV < 60% Substandard 429 — — 429 — 429 Total one-to-four family residential 429 — — 429 — 429 Total non-performing loans acquired 429 — — 429 — 429 Total non-performing loans $ 2,038 $ 687 $ 6,082 $ 8,807 $ 15 $ 8,822 At December 31, 2014 Total Non-Performing Loans Non-Accruing Loans 0-29 Days Past Due 30-89 Days Past Due 90 Days or More Past Due Total 90 Days or More Past Due and Accruing Total Non-Performing Loans Loans held-for-investment: Real estate loans: Commercial LTV => 35% Substandard — 395 10,769 11,164 — 11,164 Total commercial — 395 10,769 11,164 — 11,164 One-to-four family residential LTV < 60% Substandard — 190 674 864 286 1,150 Total — 190 674 864 286 1,150 LTV => 60% Substandard — — 1,028 1,028 — 1,028 Total — — 1,028 1,028 — 1,028 Total one-to-four family residential — 190 1,702 1,892 286 2,178 Home equity and lines of credit Substandard — 98 — 98 — 98 Total home equity and lines of credit — 98 — 98 — 98 Commercial and industrial loans Substandard — — 408 408 — 408 Total commercial and industrial loans — — 408 408 — 408 Other loans Pass — — — — — — Total other loans — — — — — — Total non-performing loans held-for-investment $ — $ 683 $ 12,879 $ 13,562 $ 286 $ 13,848 Loans acquired: One-to-four family residential LTV < 60% Pass — — — — 422 422 Substandard — — 313 313 — 313 Total one-to-four family residential — — 313 313 422 735 Total non-performing loans acquired — — 313 313 422 735 Total non-performing loans $ — $ 683 $ 13,192 $ 13,875 $ 708 $ 14,583 The following table sets forth the detail and delinquency status of originated and acquired loans, net of deferred fees and costs, by performing and non-performing loans at December 31, 2015 and 2014 (in thousands): December 31, 2015 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Loans held-for-investment: Real estate loans: Commercial LTV < 35% Pass $ 50,974 $ 1,279 $ 52,253 $ — $ 52,253 Special Mention 974 — 974 — 974 Substandard 1,233 — 1,233 — 1,233 Total 53,181 1,279 54,460 — 54,460 LTV => 35% Pass 319,411 322 319,733 — 319,733 Special Mention 2,966 — 2,966 — 2,966 Substandard 8,696 11,627 20,323 5,232 25,555 Total 331,073 11,949 343,022 5,232 348,254 Total commercial 384,254 13,228 397,482 5,232 402,714 One-to-four family residential LTV < 60% Pass 45,737 2,692 48,429 — 48,429 Special Mention 134 370 504 — 504 Substandard 696 307 1,003 1,109 2,112 Total 46,567 3,369 49,936 1,109 51,045 LTV => 60% Pass 46,578 — 46,578 — 46,578 Substandard — 351 351 1,036 1,387 Total 46,578 351 46,929 1,036 47,965 Total one-to-four family residential 93,145 3,720 96,865 2,145 99,010 Construction and land Pass 18,564 — 18,564 113 18,677 Total construction and land 18,564 — 18,564 113 18,677 Multifamily LTV < 35% Pass 124,678 — 124,678 — 124,678 Special Mention — 51 51 — 51 Substandard 775 — 775 — 775 Total 125,453 51 125,504 — 125,504 LTV= > 35% Pass 1,187,147 1,769 1,188,916 — 1,188,916 Special Mention 2,687 1,145 3,832 — 3,832 Substandard 1,913 — 1,913 559 2,472 Total 1,191,747 2,914 1,194,661 559 1,195,220 Total multifamily 1,317,200 2,965 1,320,165 559 1,320,724 Home equity and lines of credit Pass 61,561 374 61,935 — 61,935 Special Mention 75 — 75 — 75 Substandard 255 — 255 329 584 Total home equity and lines of credit 61,891 374 62,265 329 62,594 Commercial and industrial loans Pass 24,780 51 24,831 15 24,846 Special Mention 316 — 316 — 316 Substandard 395 53 448 — 448 Total commercial and industrial loans 25,491 104 25,595 15 25,610 December 31, 2015 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Other loans Pass 2,245 11 2,256 — 2,256 Total other loans 2,245 11 2,256 — 2,256 Total originated loans held-for-investment 1,902,790 20,402 1,923,192 8,393 1,931,585 Acquired loans: One-to-four family residential LTV < 60% Pass 313,425 312 313,737 — 313,737 Special Mention 549 — 549 — 549 Substandard 737 177 914 429 1,343 Total 314,711 489 315,200 429 315,629 LTV => 60% Pass 14,759 — 14,759 — 14,759 Substandard 284 — 284 — 284 Total 15,043 — 15,043 — 15,043 Total one-to-four family residential 329,754 489 330,243 429 330,672 Commercial LTV < 35% Pass 2,164 — 2,164 — 2,164 Substandard — 729 729 — 729 Total 2,164 729 2,893 — 2,893 LTV => 35% Pass 5,536 — 5,536 — 5,536 Special Mention 883 — 883 — 883 Substandard 1,848 — 1,848 — 1,848 Total 8,267 — 8,267 — 8,267 Total commercial 10,431 729 11,160 — 11,160 Multifamily LTV < 35% Pass 4,695 — 4,695 — 4,695 Special Mention 138 — 138 — 138 Total 4,833 — 4,833 — 4,833 LTV => 35% Pass 59,632 — 59,632 — 59,632 Special Mention 314 — 314 — 314 Total 59,946 — 59,946 — 59,946 Total multifamily 64,779 — 64,779 — 64,779 Home equity and lines of credit Pass 2,404 — 2,404 — 2,404 Total home equity and lines of credit 2,404 — 2,404 — 2,404 Total loans acquired 407,368 1,218 408,586 429 409,015 $ 2,310,158 $ 21,620 $ 2,331,778 $ 8,822 $ 2,340,600 December 31, 2014 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Loans held-for-investment: Real estate loans: Commercial LTV < 35% Pass $ 47,534 $ — $ 47,534 $ — $ 47,534 Special Mention 2,436 — 2,436 — 2,436 Total 49,970 — 49,970 — 49,970 LTV => 35% Pass 288,915 878 289,793 — 289,793 Special Mention 9,792 — 9,792 — 9,792 Substandard 25,073 5,093 30,166 11,164 41,330 Total 323,780 5,971 329,751 11,164 340,915 Total commercial 373,750 5,971 379,721 11,164 390,885 One-to-four family residential LTV < 60% Pass 29,288 341 29,629 — 29,629 Special Mention 1,143 — 1,143 — 1,143 Substandard 867 286 1,153 1,150 2,303 Total 31,298 627 31,925 1,150 33,075 LTV => 60% Pass 38,062 2,465 40,527 — 40,527 Special Mention — — — — — Substandard — 360 360 1,028 1,388 Total 38,062 2,825 40,887 1,028 41,915 Total one-to-four family residential 69,360 3,452 72,812 2,178 74,990 Construction and land Pass 21,445 — 21,445 — 21,445 Special Mention — — — — — Substandard — — — — — Total construction and land 21,445 — 21,445 — 21,445 Multifamily LTV < 35% Pass 64,692 — 64,692 — 64,692 Special Mention 283 — 283 — 283 Substandard 801 — 801 — 801 Total 65,776 — 65,776 — 65,776 LTV => 35% Pass 999,469 239 999,708 — 999,708 Special Mention 3,822 520 4,342 — 4,342 Substandard 4,382 331 4,713 — 4,713 Total 1,007,673 1,090 1,008,763 — 1,008,763 Total multifamily 1,073,449 1,090 1,074,539 — 1,074,539 Home equity and lines of credit Pass 54,800 135 54,935 — 54,935 Special Mention 360 — 360 — 360 Substandard 93 — 93 98 191 Total home equity and lines of credit 55,253 135 55,388 98 55,486 Commercial and industrial loans Pass 11,331 90 11,421 — 11,421 Special Mention 652 — 652 — 652 Substandard 479 32 511 408 919 Total Commercial and industrial loans 12,462 122 12,584 408 12,992 Other loans December 31, 2014 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Pass 2,097 60 2,157 — 2,157 Total other loans 2,097 60 2,157 — 2,157 Total originated loans held-for-investment $ 1,607,816 $ 10,830 $ 1,618,646 $ 13,848 $ 1,632,494 Loans acquired: One-to-four family residential LTV < 60% Pass 225,741 526 226,267 422 226,689 Special Mention 597 — 597 — 597 Substandard 424 — 424 313 737 Total 226,762 526 227,288 735 228,023 LTV => 60% Pass 5,787 375 6,162 — 6,162 Substandard 294 — 294 — 294 Total 6,081 375 6,456 — 6,456 Total one-to-four family residential 232,843 901 233,744 735 234,479 Commercial LTV < 35% Pass 2,477 — 2,477 — 2,477 Special Mention 187 521 708 — 708 Total 2,664 521 3,185 — 3,185 LTV => 35% Pass 5,817 — 5,817 — 5,817 Substandard 2,997 — 2,997 — 2,997 Total 8,814 — 8,814 — 8,814 Total commercial 11,478 521 11,999 — 11,999 Construction and land Substandard 363 — 363 — 363 Total construction and land 363 — 363 — 363 Multifamily LTV < 35% Pass 4,857 — 4,857 — 4,857 Substandard 164 — 164 — 164 Total 5,021 — 5,021 — 5,021 LTV => 35% Pass 13,457 — 13,457 — 13,457 Special Mention 366 — 366 — 366 Total 13,823 — 13,823 — 13,823 Total multifamily 18,844 — 18,844 — 18,844 Total loans acquired 263,528 1,422 264,950 735 265,685 $ 1,871,344 $ 12,252 $ 1,883,596 $ 14,583 $ 1,898,179 The following table summarizes originated and acquired (subsequent to acquisition) impaired loans as of December 31, 2015 and 2014 (in thousands): At December 31, 2015 December 31, 2014 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance Related Allowance With No Allowance Recorded: Real estate loans: Commercial LTV < 35% Substandard — 139 — — — — LTV => 35% Pass 4,051 4,188 — 3,311 3,448 — Substandard 13,371 14,748 — 12,880 14,339 — One-to-four family residential LTV < 60% Pass 221 221 — 66 66 — Special Mention — — — 138 138 — Substandard 234 234 — 262 262 — LTV => 60% Substandard 150 167 — Multifamily LTV => 35% Pass 75 545 — 86 557 — Substandard 1,012 1,012 — 477 477 — Home Equity Special Mention — — — 49 49 — Commercial and industrial loans Special Mention — — — 267 268 — Substandard 87 87 — 99 99 — With a Related Allowance Recorded: Real estate loans: Commercial LTV => 35% Substandard 4,891 5,430 (394 ) 13,033 14,365 (2,361 ) One-to-four family residential LTV < 60% Pass 503 503 (33 ) — — — Special Mention — — — 319 319 (4 ) Substandard 1,604 1,604 (152 ) 848 848 (95 ) LTV => 60% Special Mention 1,034 1,081 (97 ) — — — Substandard — — — 294 294 (20 ) Multifamily LTV => 35% Substandard 1,371 1,371 (158 ) 1,427 1,427 (215 ) Home equity and lines of credit Pass 269 269 (11 ) — — — Special Mention 44 44 (19 ) 278 278 (13 ) Substandard 41 41 (21 ) — — — Commercial and industrial loans Special Mention 29 29 (4 ) 32 32 (1 ) Substandard — — — 408 530 (108 ) Total: Real estate loans Commercial 22,313 24,505 (394 ) 29,224 32,152 (2,361 ) One-to-four family residential 3,746 3,810 (282 ) 1,927 1,927 (119 ) Multifamily 2,458 2,928 (158 ) 1,990 2,461 (215 ) Home equity and lines of credit 354 354 (51 ) 327 327 (13 ) Commercial and industrial loans 116 $ 116 (4 ) 806 929 (109 ) $ 28,987 $ 31,713 $ (889 ) $ 34,274 $ 37,796 $ (2,817 ) Included in the table above at December 31, 2015 , are impaired loans with carrying balances of $14.5 million that were not written down by charge-offs or for which there are no specific reserves in our allowance for loan losses. Included in the impaired loans at December 31, 2014 , are loans with carrying balances of $13.1 million that were not written down by charge-offs or for which there are no specific reserves in our allowance for loan losses. Loans not written down by charge-offs or specific reserves at December 31, 2015 and 2014 , have sufficient collateral values, less costs to sell (including any discounts to facilitate a sale), or sufficient future cash flows to support the carrying balances of the loans. The following table summarizes the average recorded investment in originated and acquired impaired loans (excluding PCI loans) and interest recognized on impaired loans as of, and for, the years ended December 31, 2015 , and December 31, 2014 (in thousands): December 31, 2015 December 31, 2014 Average Recorded Investment Interest Income Average Recorded Investment Interest Income With No Allowance Recorded: Real estate loans: Commercial LTV < 35% Pass $ — $ — $ 681 $ — LTV => 35% Pass 2,938 184 6,615 149 Special Mention 109 — — — Substandard 12,593 884 9,641 500 Construction and land Substandard — — 22 — One-to-four family residential LTV < 60% Pass 207 9 13 2 Special Mention 55 — 213 7 Substandard 188 22 266 16 One-to-four family residential LTV => 60% Substandard 101 3 — 6 Multifamily LTV => 35% Pass 80 17 53 17 Substandard 688 27 714 27 Home equity and lines of cr

Premises And Equipment, Net

Premises And Equipment, Net	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Premises And Equipment, Net	Premises and Equipment, Net At December 31, 2015 and 2014 , premises and equipment, less accumulated depreciation and amortization, consists of the following (in thousands): December 31, 2015 2014 At cost: Land $ 2,530 $ 2,026 Buildings and improvements 6,695 6,691 Capital leases 2,600 2,600 Furniture, fixtures, and equipment 19,954 19,658 Leasehold improvements 26,197 26,202 57,976 57,177 Accumulated depreciation and amortization (34,333 ) (30,951 ) Premises and equipment, net $ 23,643 $ 26,226 Depreciation expense for the years ended December 31, 2015 , 2014 , and 2013 , was $3.4 million , $3.6 million , and $3.6 million , respectively. There were no sales of premises and equipment in 2015 or 2014. The Company realized a gain of $397,000 from the sale of vacant land adjacent to a branch in 2013.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Deposits	Deposits Deposit account balances are summarized as follows (dollars in thousands): December 31, 2015 2014 Amount Weighted Average Rate Amount Weighted Average Rate Transaction: Negotiable orders of withdrawal $ 217,813 0.25 % $ 124,961 0.34 % Non-interest bearing checking 263,073 — 269,466 — Total transaction 480,886 0.11 394,427 0.11 Savings: Money market 548,132 0.62 440,887 0.38 Savings 524,043 0.47 432,207 0.31 Total savings 1,072,175 0.55 873,094 0.35 Certificates of deposit: Under $250,000 461,127 1.11 320,525 1.05 $250,000 or more 38,741 1.73 32,619 1.75 Total certificates of deposit 499,868 1.15 353,144 1.11 Total deposits $ 2,052,929 0.59 % $ 1,620,665 0.46 % The Company had brokered deposits (included in certificates of deposit in the above table) of $157.1 million and $40.9 million at December 31, 2015 and 2014 , respectively. Scheduled maturities of certificates of deposit are summarized as follows (in thousands): December 31, 2015 2016 $ 222,419 2017 68,452 2018 55,585 2019 75,574 2020 77,825 Thereafter 13 Total $ 499,868 Interest expense on deposits is summarized as follows (in thousands): December 31, 2015 2014 2013 Negotiable order of withdrawal and money market $ 2,816 $ 1,766 $ 1,956 Savings-passbook and statement 2,141 445 679 Certificates of deposit 5,466 3,180 3,866 $ 10,423 $ 5,391 $ 6,501

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Borrowings	Borrowings Borrowings consisted of securities sold under agreements to repurchase, FHLB advances, and obligations under capital leases and are summarized as follows (in thousands): December 31, 2015 2014 Repurchase agreements $ 63,000 $ 203,200 Other borrowings: FHLB advances 487,130 572,493 Floating rate advances 7,272 2,058 Obligations under capital leases 727 907 $ 558,129 $ 778,658 FHLB advances are secured by a blanket lien on unencumbered securities and the Company’s FHLB capital stock. Repurchase agreements and FHLB advances have contractual maturities as follows (in thousands): December 31, 2015 FHLB Repurchase Advances Agreements 2016 $ 83,910 $ 55,000 2017 159,003 6,000 2018 140,715 2,000 2019 58,502 — 2020 45,000 — $ 487,130 $ 63,000 At December 31, 2015 , repurchase agreements have a weighted average rate of 2.77% , with $51.0 million maturing in the in the first quarter of 2016 and $12.0 million maturing in more than 90 days. The repurchase agreements are secured primarily by mortgage-backed securities with an amortized cost of $69.1 million , and a fair value of $70.7 million , at December 31, 2015 . At December 31, 2014 , repurchase agreements had a weighted average rate of 1.69% , with $109.2 million maturing in the first quarter of 2015 and $94.0 million maturing in more than 90 days. The repurchase agreements were secured primarily by mortgage-backed securities with an amortized cost of $213.9 million , and a fair value of $218.3 million , at December 31, 2014 . The Company has the ability to obtain additional funding from the FHLB and Federal Reserve Bank discount window of approximately $698.8 million , utilizing unencumbered and unpledged securities of $128.5 million and multifamily loans of $570.3 million at December 31, 2015 . The Company expects to have sufficient funds available to meet current commitments in the normal course of business. Interest expense on borrowings is summarized as follows (in thousands): December 31, 2015 2014 2013 Repurchase agreements $ 2,446 $ 4,161 $ 6,492 FHLB advances 6,742 5,717 3,836 Floating rate advances 17 3 10 Obligations under capital leases 60 80 109 $ 9,265 $ 9,961 $ 10,447

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense (benefit) consists of the following (in thousands): December 31, 2015 2014 2013 Federal tax expense (benefit): Current $ 11,796 $ 11,195 $ 12,493 Deferred (2,305 ) (1,675 ) (2,758 ) 9,491 9,520 9,735 State and local tax expense (benefit): Current 1,811 1,828 2,276 Deferred 673 508 (1,275 ) 2,484 2,336 1,001 Total income tax expense $ 11,975 $ 11,856 $ 10,736 Reconciliation between the amount of reported total income tax expense and the amount computed by multiplying the applicable statutory income tax rate for the years ended December 31, 2015 , 2014 , and 2013 , is as follows (dollars in thousands): December 31, 2015 2014 2013 Tax expense at statutory rate of 35% $ 11,027 $ 11,242 $ 10,459 Increase (decrease) in taxes resulting from: State tax, net of federal income tax 1,615 1,519 651 Bank owned life insurance (1,319 ) (1,366 ) (1,262 ) Merger related costs 201 — — Incentive stock options 210 134 149 Uncertain tax position 51 131 448 Other, net 190 196 291 Income tax expense $ 11,975 $ 11,856 $ 10,736 The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2015 and 2014 , are as follows (in thousands): December 31, 2015 2014 Deferred tax assets: Allowance for loan losses $ 9,514 $ 10,302 Capitalized leases 287 369 Deferred compensation 2,450 2,577 Accrued salaries 910 950 Postretirement benefits 555 523 Equity awards 4,707 2,930 Unrealized actuarial losses on post retirement benefits 217 226 Straight-line leases adjustment 1,099 1,083 Asset retirement obligation 97 100 Reserve for accrued interest receivable 775 1,220 Reserve for loan commitments 127 184 Employee Stock Ownership Plan 532 308 Other 358 398 Depreciation 2,123 1,616 Fair value adjustments of acquired loans 7,105 6,247 Fair value adjustments of pension benefit obligations 267 306 Unrealized losses securities 1,780 291 Total gross deferred tax assets 32,903 29,630 Deferred tax liabilities: Fair value adjustments of acquired securities 9 13 Fair value adjustments of deposit liabilities 30 27 Deferred loan fees 1,777 1,639 Other 21 — Total gross deferred tax liabilities 1,837 1,679 Net deferred tax asset $ 31,066 $ 27,951 The Company has determined that it is not required to establish a valuation reserve for the net deferred tax asset account since it is “more likely than not” that the net deferred tax assets will be realized through future reversals of existing taxable temporary differences, future taxable income and tax planning strategies. The conclusion that it is “more likely than not” that the net deferred tax assets will be realized is based on the history of earnings and the prospects for continued profitability. Management will continue to review the tax criteria related to the recognition of deferred tax assets. As a savings institution, the Bank is subject to a special federal tax provision regarding its frozen tax bad debt reserve. At December 31, 2015 , and December 31, 2014 , the Bank’s federal tax bad debt base-year reserve was $5.9 million , with a related net deferred tax liability of $2.8 million , which has not been recognized since the Bank does not expect that this reserve will become taxable in the foreseeable future. Events that would result in taxation of this reserve include redemptions of the Bank’s stock or certain excess distributions by the Bank to the Company. A reconciliation of the Company’s uncertain tax positions are as follows (in thousands): December 31, 2015 2014 2013 Beginning balance $ 230 $ 679 $ 231 Settlements based on tax positions related to prior years — (580 ) — Additions based on tax positions related to prior years 51 131 448 Ending balance $ 281 $ 230 $ 679 The Company recognizes interest and penalties on income taxes in income tax expense. The following years are open for examination or under examination: • Federal tax filings for 2011 through present. • New York State tax filings 2010 through present. The 2010 through 2012 filings are currently under examination. • New York City tax filings 2010 through present. The 2010 through 2012 filings are currently under examination. • State of New Jersey 2010 through present.

Retirement Benefits

Retirement Benefits	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Retirement Benefits	Retirement Benefits The Company has a 401(k) plan for its employees, which grants eligible employees (those salaried employees with at least three months of service) the opportunity to invest from 2% to 15% of their base compensation in certain investment alternatives. The Company contributes an amount equal to 25% of employee contributions on the first 6% of base compensation contributed by eligible employees for the first three years of participation. Subsequent years of participation in excess of three years will increase the Company matching contribution from 25% to 50% of an employee’s contributions, on the first 6% of base compensation contributed by eligible employees. A member becomes fully vested in the Company’s contributions upon (a) completion of five years of service, or (b) normal retirement, early retirement, permanent disability, or death. The Company’s contribution to this plan amounted to approximately $321,000 , $292,000 , and $266,000 for the years ended December 31, 2015 , 2014 , and 2013 , respectively. The Company also maintains a profit-sharing plan in which the Company can contribute to the participant’s 401(k) account, at its discretion, up to the legal limit of the Internal Revenue Code. The Company did not contribute to the profit sharing plan during 2015 , 2014 , and 2013 . The Company maintains the Northfield Bank ESOP. The ESOP is a tax-qualified plan designed to invest primarily in the Company’s common stock. The ESOP provides employees with the opportunity to receive a funded retirement benefit from the Bank, based primarily on the value of the Company’s common stock. The ESOP was authorized to, and did purchase, 2,463,884 shares of the Company’s common stock in the Company’s initial public offering at a price of $7.13 per share. This purchase was funded with a loan from Northfield Bancorp, Inc. to the ESOP. The outstanding balance at December 31, 2015 and 2014 , was $12.7 million and $13.3 million , respectively. The shares of the Company’s common stock purchased in the initial public offering are pledged as collateral for the loan. Shares are released for allocation to participants as loan payments are made. A total of 80,131 and 80,728 shares were released and allocated to participants of the ESOP for the years ended December 31, 2015 and 2014 , respectively. Cash dividends on unallocated shares are utilized to satisfy required debt payments. Dividends on allocated shares are utilized to prepay debt which releases additional shares to participants. Upon completion of the Company’s second-step conversion, a second ESOP was established for employees in 2013; the second ESOP was authorized to, and did purchase, 1,422,357 shares of the Company’s common stock at a price of $10.00 per share. The purchase was funded with a loan from Northfield Bancorp, Inc. to the second ESOP. The outstanding balance at December 31, 2015 and 2014 , was $13.3 million and $13.6 million , respectively. The shares of the Company’s common stock purchased in the second-step conversion are pledged as collateral for the loan. Shares are released for allocation to participants as loan payments are made. A total of 47,384 and 47,412 shares were released and allocated to participants of the second ESOP for the years ended December 31, 2015 and 2014 , respectively. Cash dividends on unallocated shares are utilized to satisfy required debt payments. Dividends on allocated shares are utilized to prepay debt which releases additional shares to participants. ESOP compensation expense for both plans for the years ended December 31, 2015 , 2014 , and 2013 was $1.9 million , $1.7 million , and $1.5 million , respectively. The Company maintains a Supplemental Employee Stock Ownership Plan (the SESOP), a non-qualified plan, that provides supplemental benefits to certain executives who are prevented from receiving the full benefits contemplated by the ESOP’s benefit formula due to tax law limits for tax-qualified plans. The supplemental payments for the SESOP consist of cash payments representing the value of Company shares that cannot be allocated to participants under the ESOPs due to legal limitations imposed on tax-qualified plans. The Company's required contributions to the SESOP plan were $82,000 , $7,000 , and $38,000 for the years ended December 31, 2015 , 2014 , and 2013 , respectively. The Company provides post retirement medical and life insurance to a limited number of retired individuals. The Company also provides retiree life insurance benefits to all qualified employees, up to certain limits. The following tables set forth the funded status and components of postretirement benefit costs at December 31 measurement dates (in thousands): 2015 2014 2013 Accumulated postretirement benefit obligation beginning of year $ 1,846 $ 1,294 $ 1,778 Service cost 9 6 9 Interest cost 62 53 56 Actuarial loss (gain) 149 578 (455 ) Benefits paid (116 ) (85 ) (94 ) Accumulated postretirement benefit obligation end of year 1,950 1,846 1,294 Accrued liability (included in accrued expenses and other liabilities) $ 1,950 $ 1,846 $ 1,294 The following table sets forth the amounts recognized in accumulated other comprehensive income (loss) (in thousands): December 31, 2015 2014 Net loss $ 578 $ 473 Transition obligation — 17 Prior service cost 12 50 Loss recognized in accumulated other comprehensive income $ 590 $ 540 The estimated net loss, prior service cost, and transition obligation, that will be amortized from accumulated other comprehensive income (loss) into net periodic cost in 2016, are $54,000 , $12,000 , and $0 respectively. The following table sets forth the components of net periodic postretirement benefit costs for the years ended December 31, 2015 , 2014 , and 2013 (in thousands): December 31, 2015 2014 2013 Service cost $ 9 $ 6 $ 9 Interest cost 62 53 56 Amortization of transition obligation 17 17 17 Amortization of prior service costs 38 24 16 Amortization of unrecognized (gain) loss 44 (11 ) 36 Net postretirement benefit cost included in compensation and employee benefits $ 170 $ 89 $ 134 The assumed discount rate related to plan obligations reflects the weighted average of published market rates for high-quality corporate bonds with terms similar to those of the plans expected benefit payments, rounded to the nearest quarter percentage point. The Company’s discount rate and rate of compensation increase used in accounting for the plan are as follows: 2015 2014 2013 Assumptions used to determine benefit obligation at period end: Discount rate 3.75 % 3.50 % 4.25 % Rate of increase in compensation 4.00 % 4.00 % 4.00 % Assumptions used to determine net periodic benefit cost for the year: Discount rate 3.50 % 4.25 % 3.25 % Rate of increase in compensation 4.00 % 4.00 % 4.00 % At December 31, 2015 , a medical cost trend rate of 8.75% decreasing 0.50% per year thereafter until an ultimate rate of 4.75% is reached, was used in the plan’s valuation. The Company’s healthcare cost trend rates are based, among other things, on the Company’s own experience and third-party analysis of recent and projected healthcare cost trends. A one percentage-point change in assumed heath care cost trends would have the following effects (in thousands): One Percentage Point Increase One Percentage Point Decrease 2015 2014 2015 2014 Effect on benefits earned and interest cost $ 6 $ 4 $ (4 ) $ (3 ) Effect on accumulated postretirement benefit obligation 156 153 (139 ) (135 ) A one percentage-point change in assumed heath care cost trends would have the following effects (in thousands): One Percentage Point Increase One Percentage Point Decrease 2015 2014 2013 2015 2014 2013 Aggregate of service and interest components of net periodic cost (benefit) $ 6 $ 4 $ 5 $ (4 ) $ (3 ) $ (4 ) Benefit payments of approximately $116,000 , $85,000 , and $94,000 were made in 2015 , 2014 , and 2013 , respectively. The benefits expected to be paid under the postretirement health benefits plan for the next five years are as follows: $125,000 in 2016 ; $130,000 in 2017 ; $134,000 in 2018 ; $137,000 in 2019 ; and $140,000 in 2020 . The benefit payments expected to be paid in the aggregate for the years 2021 through 2025 are $709,000 . The expected benefits are based on the same assumptions used to measure the Company’s benefit obligation at December 31, 2015 , and include estimated future employee service. The Company also maintained a defined benefit pension plan covering certain employees and individuals from the Flatbush Federal Savings and Loan Association Pension Plan ( as part of the acquisition of Flatbush Federal Bancorp, Inc. and its wholly-owned subsidiary, Flatbush Federal Savings and Loan Association), which was terminated in February 2014, and resulted in the Company recognizing a pre-tax gain of $937,000 . The Company maintains a nonqualified plan to provide for the elective deferral of all or a portion of director fees by members of the participating board of directors, deferral of all or a portion of the compensation and/or annual incentive compensation payable to eligible employees of the Company, and to provide to certain officers of the Company benefits in excess of those permitted to be paid by the Company’s savings plan, ESOP, and profit-sharing plan under the applicable Internal Revenue Code. The plan obligation was approximately $6.9 million and $6.5 million at December 31, 2015 and 2014 , respectively, and is included in accrued expenses and other liabilities on the consolidated balance sheets. Income under this plan was $392,000 and $153,000 for the years ended December 31, 2015 and 2014, respectively. Expense under this plan was $963,000 for the year ended December 31, 2013 . The Company invests to fund this future obligation, in various mutual funds designated as trading securities. The securities are marked-to-market through current period earnings as a component of non-interest income. Accrued obligations under this plan are credited or charged with the return on the trading securities portfolio as a component of compensation and benefits expense. The Company entered into a supplemental retirement agreement with its former president and director in 2006. The agreement provides for 120 monthly payments of $17,450 . The present value of the obligation, of approximately $1,625,000 , was recorded in compensation and benefits expense in 2006. The present value of the obligation as of December 31, 2015 and 2014 , was approximately $154,000 and $350,000 , respectively.

Equity Incentive Plan

Equity Incentive Plan	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Incentive Plan	Equity Incentive Plan In May 2015, the Company granted to directors and employees a total of 419,000 restricted shares, and 1,090,000 stock options to purchase Company stock. These shares and options were issued out of the 2014 Equity Incentive Plan (2014 EIP), which allows the Company to grant common stock or options to purchase common stock at specific prices to directors and employees of the Company. The 2014 EIP provides for the issuance or delivery of up to 4,978,249 shares ( 1,422,357 restricted shares and 3,555,892 stock options) of Northfield Bancorp, Inc. common stock subject to certain plan limitations. All stock options and restricted stock granted to date vest in equal installments over a five -year period beginning one year from the date of grant. The vesting of options and restricted stock awards may accelerate in accordance with terms of the 2014 EIP. Stock options were granted at an exercise price equal to the fair value of the Company’s common stock on the grant date based on quoted market prices and all have an expiration period of ten years. The fair value of stock options granted on May 27, 2015, was estimated utilizing the Black-Scholes option pricing model using the following assumptions: an expected life of 6.5 years, risk-free rate of return of 1.67% , volatility of 32.06% and a dividend yield of 1.90% . As of December 31, 2015 , 43,877 restricted shares and 54,332 stock options remain available for issuance under the 2014 EIP . In 2014, the Company granted to directors and employees a total of 1,001,200 restricted shares, and 2,502,600 stock options to purchase Company stock. These shares and options were issued out of the 2014 EIP. All stock options and restricted stock granted to date vest in equal installments over a five -year period beginning one year from the date of grant. The vesting of options and restricted stock awards may accelerate in accordance with terms of the 2014 EIP. Stock options were granted at an exercise price equal to the fair value of the Company’s common stock on the grant date based on quoted market prices and all have an expiration period of ten years. The fair value of stock options granted on June 11, 2014, was estimated utilizing the Black-Scholes option pricing model using the following assumptions: an expected life of 6.5 years, risk-free rate of return of 1.92% , volatility of 33.83% and a dividend yield of 1.83% . The fair value of stock options granted on December 8, 2014, was estimated utilizing the Black-Scholes option pricing model using the following assumptions: an expected life of 6.5 years, risk-free rate of return of 1.81% , volatility of 32.92% and a dividend yield of 1.68% . The Company also maintains the Northfield Bancorp, Inc. 2008 Equity Incentive Plan (2008 EIP) to grant common stock or options to purchase common stock at specific prices to directors and employees of the Company. The 2008 EIP provides for the issuance or delivery of up to 4,311,796 shares of Northfield Bancorp, Inc. common stock subject to certain plan limitations. As of December 31, 2015 , 60,085 restricted shares and 151,445 stock options remain available for issuance under the 2008 EIP. All stock options and restricted stock granted to date vest in equal installments over a five -year period beginning one year from the date of grant. The vesting of options and restricted stock awards may accelerate in accordance with terms of the 2008 EIP. Stock options were granted at an exercise price equal to the fair value of the Company’s common stock on the grant date based on quoted market prices and all have an expiration period of ten years . The fair value of stock options granted on January 30, 2009, was estimated utilizing the Black-Scholes option pricing model using the following assumptions: an expected life of 6.5 years utilizing the simplified method, risk-free rate of return of 2.17% , volatility of 35.33% and a dividend yield of 1.61% . The fair value of stock options granted on May 29, 2009, was estimated utilizing the Black-Scholes option pricing model using the following assumptions: an expected life of 6.5 years utilizing the simplified method, risk-free rate of return of 2.88% , volatility of 38.39% and a dividend yield of 1.50% . The fair value of stock options granted on January 30, 2010, was estimated utilizing the Black-Scholes option pricing model using the following assumptions: an expected life of 6.5 years utilizing the simplified method, risk-free rate of return of 2.90% , volatility of 38.29% and a dividend yield of 1.81% . The fair value of stock options granted on July 26, 2013, was estimated utilizing the Black-Scholes option pricing model using the following assumptions: an expected life of 6.5 years utilizing the simplified method, risk-free rate of return of 1.39% , volatility of 35.33% and a dividend yield of 1.98% . The Company is expensing the grant date fair value of all employee and director share-based compensation over the requisite service periods on a straight-line basis. During the years ended December 31, 2015 , 2014 , and 2013 , the Company recorded, $6.8 million , $2.8 million , and $3.2 million of stock-based compensation. The following table is a summary of the Company’s non-vested stock options as of December 31, 2015 , and changes therein during the year then ended: Number of Stock Options Weighted Average Grant Date Fair Value Weighted Average Exercise Price Weighted Average Contractual Life (years) Outstanding- December 31, 2013 2,800,305 $ 2.30 $ 7.13 5.16 Granted 2,502,600 3.91 13.13 9.45 Forfeited (18,000 ) 3.91 13.13 — Exercised (146,833 ) 2.30 7.11 — Outstanding- December 31, 2014 5,138,072 3.08 10.04 7.44 Granted 1,090,000 4.07 14.76 9.41 Forfeited (73,040 ) 3.91 13.13 — Exercised (143,171 ) 2.33 7.22 — Outstanding- December 31, 2015 6,011,861 3.30 10.93 6.41 Exercisable- December 31, 2015 2,973,603 $ 2.57 $ 8.08 3.97 Expected future stock option expense related to the non-vested options outstanding as of December 31, 2015 , is $10.2 million over an average period of 3.80 years. The following is a summary of the status of the Company’s restricted shares as of December 31, 2015 , and changes therein during the year then ended: Number of Shares Awarded Weighted Average Grant Date Fair Value Non-vested at December 31, 2013 240,083 $ 7.29 Granted 1,001,200 13.13 Vested (228,209 ) 7.16 Forfeited (10,000 ) 13.13 Non-vested at December 31, 2014 1,003,074 13.11 Granted 419,000 14.76 Vested (196,492 ) 13.09 Forfeited (31,720 ) 13.13 Non-vested at December 31, 2015 1,193,862 $ 13.70 Expected future stock award expense related to the non-vested restricted awards as of December 31, 2015 , is $13.9 million over an average period of 3.80 years. Upon the exercise of stock options, management expects to utilize treasury stock as the source of issuance for these shares.

Commitments And Contingencies

Commitments And Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	Commitments and Contingencies The Company, in the normal course of business, is party to commitments that involve, to varying degrees, elements of risk in excess of the amounts recognized in the consolidated financial statements. These commitments include unused lines of credit and commitments to extend credit. At December 31, 2015 and 2014 , the following commitment and contingent liabilities existed that are not reflected in the accompanying consolidated financial statements (in thousands): December 31, 2015 2014 Commitments to extend credit $ 18,400 $ 72,438 Unused lines of credit 69,414 60,598 Standby letters of credit 471 420 The Company’s maximum exposure to credit losses in the event of nonperformance by the other party to these commitments is represented by the contractual amount. The Company uses the same credit policies in granting commitments and conditional obligations as it does for amounts recorded in the consolidated balance sheets. These commitments and obligations do not necessarily represent future cash flow requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary, is based on management’s assessment of risk. Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third-party. The guarantees generally extend for a term of up to one year and are fully collateralized. For each guarantee issued, if the customer defaults on a payment to the third-party, the Company would have to perform under the guarantee. The unamortized fee on standby letters of credit approximates their fair value; such fees were insignificant at December 31, 2015 , and at December 31, 2014 . The Company maintains an allowance for estimated losses on commitments to extend credit in other liabilities. At December 31, 2015 and 2014 , the allowance was $318,000 and $472,000 , respectively, and changes to the allowance are recorded as a component of other non-interest expense. At December 31, 2015 , the Company was obligated under non-cancelable operating leases and capitalized leases on property used for banking purposes. Most leases contain escalation clauses and renewal options which provide for increased rentals as well as for increases in certain property costs including real estate taxes, common area maintenance, and insurance. The projected minimum annual rental payments and receipts under the capitalized leases and operating leases, are as follows (in thousands): Rental Payments Capitalized Leases Rental Payments Operating Leases Year ending December 31: 2016 $ 247 $ 4,294 2017 254 4,185 2018 262 3,805 2019 44 3,463 2020 — 3,452 Thereafter — 26,645 Total minimum lease payments $ 807 $ 45,844 Net rental expense included in occupancy expense was approximately $4.6 million , $4.3 million , and $4.2 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively. In the normal course of business, the Company may be a party to various outstanding legal proceedings and claims. In the opinion of management, the consolidated financial statements will not be materially affected by the outcome of such legal proceedings and claims. The Bank has entered into employment agreements with its Chief Executive Officer and the other executive officers of the Bank to ensure the continuity of executive leadership, to clarify the roles and responsibilities of executives, and to make explicit the terms and conditions of executive employment. These agreements are for a term of three years subject to review and annual renewal, and provide for certain levels of base annual salary and in the event of a change in control, as defined, or in the event of termination, as defined, certain levels of base salary, bonus payments, and benefits for a period of up to three years.

Regulatory Requirements

Regulatory Requirements	12 Months Ended
	Dec. 31, 2015
Regulatory Requirements [Abstract]
Regulatory Requirements	Regulatory Requirements Federal regulations require federally insured depository institutions to meet several minimum capital standards: a common equity Tier 1 capital to risk-based assets ratio of 4.5% , a Tier 1 capital to risk-based assets ratio of 6.0% , a total capital to risk-based assets of 8.0% , and a 4.0% Tier 1 capital to total assets leverage ratio. These capital requirements were effective January 1, 2015, and are the result of a final rule implementing recommendations of the Basel Committee on Banking Supervision and certain requirements of the Dodd-Frank Act. Under prompt corrective action regulations, the OCC is required to take certain supervisory actions (and may take additional discretionary actions) with respect to an undercapitalized institution. Such actions could have a direct material effect on the institution’s financial statements. The regulations establish a framework for the classification of savings institutions into five categories: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized. Generally, an institution is considered well capitalized if it has a leverage (Tier 1) ratio of 5.0% or greater, a common equity Tier 1 ratio of 6.5% or greater, a Tier 1 risk-based capital ratio of 8.0% or greater, and a total risk-based capital ratio of 10.0% or greater. The foregoing capital ratios are based in part on specific quantitative measures of assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. Capital amounts and classifications also are subject to qualitative judgments by the regulators about capital components, risk weighting, and other factors. On January 1, 2015, a final rule issued by the federal bank regulatory agencies became effective which revised their leverage and risk-based capital requirements and the method for calculating risk-weighted assets to make them consistent with agreements that were reached by the Basel Committee on Banking Supervision and certain provisions of the Dodd-Frank Act. Among other things, the new rule establishes a new common equity Tier 1 minimum capital requirement ( 4.5% of risk-weighted assets), increases the minimum Tier 1 capital to risk-based assets requirement (from 4% to 6% of risk-weighted assets) and assigns a higher risk weight ( 150% ) to exposures that are more than 90 days past due or are on non-accrual status, and to certain commercial real estate facilities that finance the acquisition, development, or construction of real property. The final rule also requires unrealized gains and losses on certain “available-for-sale” securities holdings to be included for purposes of calculating regulatory capital requirements unless a one-time opt-in or opt-out election is exercised. The rule limits a banking organization's capital distributions and certain discretionary bonus payments if the banking organization does not hold a “capital conservation buffer” consisting of 2.5% of common equity Tier 1 capital to risk-weighted assets in addition to the amount necessary to meet its minimum risk-based capital requirements. The capital conservation buffer requirement will be phased in beginning January 1, 2016, and ending January 1, 2019, when the full capital conservation buffer requirement will be effective. The final rule also implemented consolidated capital requirements for savings and loan holding companies, such as the Company, effective January 1, 2015. Management believes that as of December 31, 2015 , and December 31, 2014 , the Bank exceeded all capital adequacy requirements to which it is subject. Further, the most recent OCC notification categorized the Bank as a well-capitalized institution under the prompt corrective action regulations. There have been no conditions or events since that notification that management believes have changed the Bank's classification. The following is a summary of Northfield Bank’s regulatory capital amounts and ratios compared to the regulatory requirements as of December 31, 2015 and 2014 , for classification as a well-capitalized institution and minimum capital (dollars in thousands): For Well For Capital Capitalized Adequacy Under Prompt Corrective Actual Purposes Action Provisions Amount Ratio Amount Ratio Amount Ratio As of December 31, 2015: Common Equity Tier 1 Capital (to risk-weighted assets) $ 498,067 20.19 % $ 111,025 4.50 % $ 160,369 6.50 % Tier 1 Leverage 498,067 15.72 126,744 4.00 158,429 5.00 Tier I capital (to risk-weighted assets) 498,067 20.19 148,033 6.00 197,378 8.00 Total capital (to risk-weighted assets) 523,223 21.21 197,378 8.00 246,722 10.00 As of December 31, 2014: Tangible capital to tangible assets $ 494,131 16.46 % $ 45,036 1.50 % NA NA Tier I capital (core) (to adjusted total assets) 494,131 16.46 120,096 4.00 150,119 5.00 Total capital (to risk-weighted assets) 520,875 22.95 181,585 8.00 226,982 10.00 The following is a summary of the Company's regulatory capital amounts and ratios compared to the regulatory requirements as of December 31, 2015 for classification as a well-capitalized institution and minimum capital (dollars in thousands). The Company was not subject to such capital requirements at December 31, 2014. As of December 31, 2015, the Company exceeded all capital requirements to which it is subject. For Well For Capital Capitalized Adequacy Under Prompt Corrective Actual Purposes Action Provisions Amount Ratio Amount Ratio Amount Ratio As of December 31, 2015: Common Equity Tier 1 Capital (to risk-weighted assets) $ 546,564 22.15 % $ 111,025 4.50 % $ 160,369 6.50 % Tier 1 Leverage 546,564 17.25 126,764 4.00 158,455 5.00 Tier I capital (to risk-weighted assets) 546,564 22.15 148,033 6.00 197,378 8.00 Total capital (to risk-weighted assets) 571,720 23.17 197,378 8.00 246,722 10.00

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurement	Fair Value of Measurement The following table presents the assets reported on the consolidated balance sheet at their estimated fair value as of December 31, 2015 and 2014 , by level within the Fair Value Measurements and Disclosures Topic of the FASB Accounting Standards Codification. Financial assets and liabilities are classified in their entirety based on the level of input that is significant to the fair value measurement. The fair value hierarchy is as follows: • Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. • Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (for example, interest rates, volatilities, prepayment speeds, loss severities, credit risks and default rates) or inputs that are derived principally from or corroborated by observable market data by correlations or other means. • Level 3 Inputs – Significant unobservable inputs that reflect the Company’s own assumptions that market participants would use in pricing the assets or liabilities. The following tables summarize financial assets and financial liabilities measured at fair value as of December 31, 2015 and 2014 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands): Fair Value Measurements at December 31, 2015 Using: Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Measured on a recurring basis: Assets: Investment securities: Available-for-sale: Mortgage-backed securities GSE $ 529,524 $ — $ 529,524 $ — Non-GSE 579 — 579 — Other securities Corporate bonds 11,011 — 11,011 — Equities 481 481 — — Total available-for-sale 541,595 481 541,114 — Trading securities 6,713 6,713 — — Total $ 548,308 $ 7,194 $ 541,114 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 9,091 $ — $ — $ 9,091 One-to-four family residential mortgage 2,873 — — 2,873 Multifamily 1,288 — — 1,288 Home equity and lines of credit 303 — — 303 Total impaired real estate loans 13,555 — — 13,555 Commercial and industrial loans 25 — — 25 Other real estate owned 45 — — 45 Total $ 13,625 $ — $ — $ 13,625 Fair Value Measurements at December 31, 2014 Using: Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Measured on a recurring basis: Assets: Investment securities: Available-for-sale: Mortgage-backed securities GSE $ 699,790 $ — $ 699,790 $ — Non-GSE 1,026 — 1,026 — Other securities Corporate bonds 70,013 — 70,013 — Equities 410 410 — — Total available-for-sale 771,239 410 770,829 — Trading securities 6,422 6,422 — — Total $ 777,661 $ 6,832 $ 770,829 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 17,438 $ — $ — $ 17,438 One-to-four family residential mortgage 672 — — 672 Multifamily 1,513 — — 1,513 Home equity and lines of credit 278 — — 278 Total impaired real estate loans 19,901 — — 19,901 Commercial and industrial loans 440 — — 440 Other real estate owned 752 — — 752 Total $ 21,093 $ — $ — $ 21,093 The following table presents qualitative information for Level 3 assets measured at fair value on a non-recurring basis at December 31, 2015 : Fair Value Valuation Methodology Unobservable Inputs Range of Inputs (in thousands) Impaired loans $ 13,580 Appraisals Discount for costs to sell 7.0% Discount for quick sale 10.0% Discounted cash flows Interest rates 4.75% - 7.5% Other real estate owned $ 45 Appraisals Discount for costs to sell 7.0% The following table presents qualitative information for Level 3 assets measured at fair value on a non-recurring basis at December 31, 2014 : Fair Value Valuation Methodology Unobservable Inputs Range of Inputs (in thousands) Impaired loans $ 20,341 Appraisals Discount for costs to sell 7.0% Discount for quick sale 10.0% - 40.0% Discounted cash flows Interest rates 4.6% - 7.5% Other real estate owned $ 752 Appraisals Discount for costs to sell 7.0% Available-for-Sale Securities: The estimated fair values for mortgage-backed securities, GSE bonds, and corporate securities are obtained from a nationally recognized third-party pricing service. The estimated fair values are derived primarily from cash flow models, which include assumptions for interest rates, credit losses, and prepayment speeds. Broker/dealer quotes are utilized as well when such quotes are available and deemed representative of the market. The significant inputs utilized in the cash flow models are based on market data obtained from sources independent of the Company (observable inputs,) and are therefore classified as Level 2 within the fair value hierarchy. The estimated fair value of equity securities classified as Level 1, are derived from quoted market prices in active markets. Equity securities consist primarily of money market mutual funds. There were no transfers of securities between Level 1 and Level 2 during the year ended December 31, 2015 . Trading Securities: Fair values are derived from quoted market prices in active markets. The assets consist of publicly traded mutual funds. Impaired Loans: At December 31, 2015 , and December 31, 2014 , the Company had originated impaired loans held-for-investment with outstanding principal balances of $17.0 million and $23.7 million that were recorded at their estimated fair value of $13.6 million and $20.3 million , respectively. The Company recorded a net decline in the specific reserve for impaired loans of $725,000 and a net increase of $123,000 for the years ended December 31, 2015 and 2014 , respectively, and net charge-offs of $1.9 million and $390,000 for the years ended December 31, 2015 and 2014 , respectively, utilizing Level 3 inputs. For purposes of estimating fair value of impaired loans, management utilizes independent appraisals, if the loan is collateral dependent, adjusted downward by management, as necessary, for changes in relevant valuation factors subsequent to the appraisal date, or the present value of expected future cash flows for non-collateral dependent loans and troubled debt restructurings. Other Real Estate Owned: At December 31, 2015 and 2014 , the Company had assets acquired through foreclosure of $45,000 and $752,000 , respectively, recorded at estimated fair value, less estimated selling costs when acquired, thus establishing a new cost basis. Estimated fair value is generally based on independent appraisals. These appraisals include adjustments to comparable assets based on the appraisers’ market knowledge and experience, and are considered Level 3 inputs. When an asset is acquired, the excess of the loan balance over fair value, less estimated selling costs, is charged to the allowance for loan losses. If the estimated fair value of the asset declines, a write-down is recorded through non-interest expense. The valuation of foreclosed assets is subjective in nature and may be adjusted in the future because of changes in the economic conditions. In addition, the Company may be required, from time to time, to measure the fair value of certain other financial assets on a nonrecurring basis in accordance with U.S. GAAP. The adjustments to fair value usually result from the application of lower-of-cost-or-market accounting or write downs of individual assets. Fair Value of Financial Instruments The FASB Accounting Standards Topic for Financial Instruments requires disclosure of the fair value of financial assets and financial liabilities, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring or non-recurring basis. The methodologies for estimating the fair value of financial assets and financial liabilities that are measured at fair value on a recurring or non-recurring basis are discussed above. The following methods and assumptions were used to estimate the fair value of other financial assets and financial liabilities not already discussed above: (a) Cash, Cash Equivalents, and Certificates of Deposit Cash and cash equivalents are short-term in nature with original maturities of three months or less ; the carrying amount approximates fair value. Certificates of deposits having original terms of six-months or less ; carrying value generally approximates fair value. Certificate of deposits with an original maturity of six months or greater the fair value is derived from discounted cash flows. (b) Securities (Held-to-Maturity) The estimated fair values for substantially all of our securities are obtained from an independent nationally recognized pricing service. The independent pricing service utilizes market prices of same or similar securities whenever such prices are available. Prices involving distressed sellers are not utilized in determining fair value. Where necessary, the independent third-party pricing service estimates fair value using models employing techniques such as discounted cash flow analyses. The assumptions used in these models typically include assumptions for interest rates, credit losses, and prepayments, utilizing market observable data where available. (c) Federal Home Loan Bank of New York Stock The fair value for FHLB of New York stock is its carrying value, since this is the amount for which it could be redeemed and there is no active market for this stock. (d) Loans (Held-for-Investment) Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type such as originated and purchased, and further segregated by residential mortgage, construction, land, multifamily, commercial and consumer. Each loan category is further segmented into amortizing and non-amortizing and fixed and adjustable rate interest terms and by performing and non-performing categories. The fair value of loans is estimated by discounting the future cash flows using current prepayment assumptions and current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. This method of estimating fair value does not incorporate the exit price concept of fair value prescribed by the FASB ASC Topic for Fair Value Measurements and Disclosures, which would also consider adjustments for other factors such as liquidity and credit quality. The fair value would be affected significantly by these other factors. (e) Loans (Held-for-Sale) Held-for-sale loans are carried at the lower of aggregate cost or estimated fair value, less costs to sell, and therefore fair value is equal to carrying value. (f) Deposits The fair value of deposits with no stated maturity, such as non-interest-bearing demand deposits, savings, NOW and money market accounts, is equal to the amount payable on demand. The fair value of certificates of deposit is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently offered for deposits of similar remaining maturities. (g) Commitments to Extend Credit and Standby Letters of Credit The fair value of commitments to extend credit and standby letters of credit are estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counterparties. For fixed-rate loan commitments, fair value also considers the difference between current levels of interest rates and the committed rates. The fair value of off-balance-sheet commitments is insignificant and therefore not included in the following table. (h) Borrowings The fair value of borrowings is estimated by discounting future cash flows based on rates currently available for debt with similar terms and remaining maturity. (i) Advance Payments by Borrowers Advance payments by borrowers for taxes and insurance have no stated maturity; the fair value is equal to the amount currently payable. The estimated fair values of the Company’s significant financial instruments at December 31, 2015 and 2014 , are presented in the following table (in thousands): December 31, 2015 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 51,853 $ 51,853 $ — $ — $ 51,853 Trading securities 6,713 6,713 — — 6,713 Securities available-for-sale 541,595 481 541,114 — 541,595 Securities held-to-maturity 10,346 — 10,369 — 10,369 FHLB of New York stock, at cost 25,803 — 25,803 — 25,803 Net loans held-for-investment 2,348,945 — — 2,375,028 2,375,028 Financial liabilities: Deposits $ 2,052,929 $ — $ 2,058,894 $ — $ 2,058,894 Repurchase agreements and other borrowings 558,129 — 557,537 — 557,537 Advance payments by borrowers 10,862 — 10,862 — 10,862 December 31, 2014 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 76,709 $ 76,709 $ — $ — $ 76,709 Trading securities 6,422 6,422 — — 6,422 Securities available-for-sale 771,239 410 770,829 — 771,239 Securities held-to-maturity 3,609 — 3,691 — 3,691 FHLB of New York stock, at cost 29,219 — 29,219 — 29,219 Net loans held-for-investment 1,942,995 — — 1,949,511 1,949,511 Financial liabilities: Deposits $ 1,620,665 $ — $ 1,622,536 $ — $ 1,622,536 Repurchase agreements and other borrowings 778,658 — 781,196 — 781,196 Advance payments by borrowers 7,792 — 7,792 — 7,792 Limitations Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with a high degree of precision. Changes in assumptions could significantly affect the estimates. Fair value estimates are based on existing on- and off-balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates.

Stock Repurchase Program

Stock Repurchase Program	12 Months Ended
	Dec. 31, 2015
Stockholders' Equity Note [Abstract]
Stock Repurchase Program	Stock Repurchase Program All of the Company's share repurchase programs, noted below, permit shares to be repurchased in open market or private transactions, through block trades, and pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities and Exchange Commission. The number of shares remaining to be purchased is calculated utilizing the remaining approved repurchase amount divided by the closing price of the stock on that day. There were no shares remaining to be purchased at December 31, 2015 . The number of shares remaining to be purchased at December 31, 2014 was 2,175,785 , based on the remaining approved repurchase amount of $32.2 million divided by the closing price of stock on that day. On May 27, 2015, the Company’s Board of Directors authorized an increase to its stock repurchase plan in the amount of up to $15.0 million . During 2014, the Company's Board of Directors authorized the repurchase of up to $170.0 million of the Company's common stock.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following is a summary of the Company’s earnings per share calculations and reconciliation of basic to diluted earnings per share for the periods indicated (in thousands, except share data): December 31, 2015 2014 2013 Net income available to common stockholders $ 19,531 $ 20,266 $ 19,147 Weighted average shares outstanding-basic 42,285,712 49,006,129 54,637,680 Effect of non-vested restricted stock and stock options outstanding 1,192,769 1,026,130 922,629 Weighted average shares outstanding-diluted 43,478,481 50,032,259 55,560,309 Earnings per share-basic $ 0.46 $ 0.41 $ 0.35 Earnings per share-diluted $ 0.45 $ 0.41 $ 0.34 Anti-dilutive shares 2,679,507 1,471,303 —

Parent-Only Financial Informati

Parent-Only Financial Information	12 Months Ended
	Dec. 31, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Parent-Only Financial Information	Parent-only Financial Information The following condensed parent company only financial information reflects Northfield Bancorp, Inc.’s investment in its wholly-owned consolidated subsidiary, Northfield Bank, using the equity method of accounting. Northfield Bancorp, Inc. Condensed Balance Sheets December 31, 2015 2014 (in thousands) Assets Cash in Northfield Bank $ 22,504 $ 53,681 Interest-earning deposits in other financial institutions 21 2,636 Investment in Northfield Bank 511,283 509,809 ESOP loan receivable 26,012 26,934 Other assets 516 1,048 Total assets $ 560,336 $ 594,108 Liabilities and Stockholders' Equity Total liabilities $ 557 $ 180 Total stockholders' equity 559,779 593,928 Total liabilities and stockholders' equity $ 560,336 $ 594,108 Northfield Bancorp, Inc. Condensed Statements of Comprehensive Income (Loss) Years Ended December 31, 2015 2014 2013 (in thousands) Interest on ESOP loan $ 875 $ 903 $ 904 Interest income on deposit in Northfield Bank 51 251 286 Interest income on corporate bonds — — 13 Gain on securities transactions, net (4 ) (2 ) — Undistributed earnings of Northfield Bank 19,718 20,331 19,157 Total income 20,640 21,483 20,360 Other expenses 891 956 1,188 Income tax expense 218 261 25 Total expense 1,109 1,217 1,213 Net income $ 19,531 $ 20,266 $ 19,147 Comprehensive income (loss): Net income $ 19,531 $ 20,266 $ 19,147 Other comprehensive (loss) income, net of tax (2,221 ) 3,885 (22,881 ) Comprehensive income (loss) $ 17,310 $ 24,151 $ (3,734 ) Northfield Bancorp, Inc. Condensed Statements of Cash Flows December 31, 2015 2014 2013 (in thousands) Cash flows from operating activities Net income $ 19,531 $ 20,266 $ 19,147 Adjustments to reconcile net income to net cash provided by operating activities: Decrease in accrued interest receivable — — 94 Decrease in due to Northfield Bank — — (541 ) (Increase) decrease in other assets (453 ) (969 ) 1,271 Increase (decrease) in other liabilities 377 (362 ) (556 ) Undistributed earnings of Northfield Bank (19,718 ) (20,329 ) (19,157 ) Net cash (used in) provided by operating activities (263 ) (1,394 ) 258 Cash flows from investing activities Additional investment in Northfield Bank — — (172,299 ) Dividends from Northfield Bank 25,900 66,274 — Maturities of corporate bonds — — 5,173 Loan to ESOP — — (14,224 ) Net cash provided by (used in) investing activities 25,900 66,274 (181,350 ) Cash flows from financing activities Proceeds from sale of common stock — — 344,202 Principal payments on ESOP loan receivable 922 865 950 Purchase of treasury stock (48,446 ) (138,702 ) (3,628 ) Dividends paid (12,184 ) (12,884 ) (26,859 ) Merger of Northfield Bancorp, MHC — — 124 Exercise of stock options 158 212 21 Additional tax benefit on stock awards 122 390 296 Net cash (used in) provided by financing activities (59,428 ) (150,119 ) 315,106 Net (decrease) increase in cash and cash equivalents (33,791 ) (85,239 ) 134,014 Cash and cash equivalents at beginning of year 56,316 141,555 7,541 Cash and cash equivalents at end of year $ 22,525 $ 56,316 $ 141,555

Selected Quarterly Financial Da

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	Selected Quarterly Financial Data (Unaudited) The following tables are a summary of certain quarterly financial data for the years ended December 31, 2015 and 2014 : 2015 Quarter Ended March 31 June 30 September 30 December 31 (Dollars in thousands, except per share data) Selected Operating Data: Interest income $ 24,753 $ 25,037 $ 25,570 26,398 Interest expense 4,769 4,752 4,997 5,170 Net interest income 19,984 20,285 20,573 21,228 Provision (recoveries) for loan losses 200 72 200 (119 ) Net interest income after provision for loan losses 19,784 20,213 20,373 21,347 Other income 2,104 2,006 1,666 2,122 Other expenses 14,300 14,514 14,847 14,448 Income before income tax expense 7,588 7,705 7,192 9,021 Income tax expense 2,586 3,410 2,515 3,464 Net income $ 5,002 $ 4,295 $ 4,677 $ 5,557 Net income per basic common share $ 0.11 $ 0.10 $ 0.11 $ 0.13 Net income per diluted common share $ 0.11 $ 0.10 $ 0.11 $ 0.13 2014 Quarter Ended March 31 June 30 September 30 December 31 (Dollars in thousands, except per share data) Selected Operating Data: Interest income $ 22,764 $ 22,151 $ 22,707 $ 24,079 Interest expense 3,649 3,631 3,737 4,335 Net interest income 19,115 18,520 18,970 19,744 Provision (recoveries) for loan losses 417 (146 ) 317 57 Net interest income after provision for loan losses 18,698 18,666 18,653 19,687 Other income 2,172 2,387 1,840 2,061 Other expenses 12,063 12,698 13,268 14,013 Income before income tax expense 8,807 8,355 7,225 7,735 Income tax expense 3,588 2,915 2,496 2,857 Net income $ 5,219 $ 5,440 $ 4,729 $ 4,878 Net income per basic common share $ 0.10 $ 0.11 $ 0.10 $ 0.11 Net income per diluted common share $ 0.10 $ 0.11 $ 0.10 $ 0.11

Subsequent Event

Subsequent Event	12 Months Ended
	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event On January 8, 2016, the Company completed its acquisition of Hopewell Valley Community Bank (Hopewell Valley). Total consideration paid for Hopewell Valley was $55.4 million , consisting of $13.7 million in cash and 2,707,381 shares of common stock valued at $41.7 million based upon the $15.41 per share closing price of Northfield Bancorp, Inc.'s common stock on January 8, 2016. At December 31, 2015, Hopewell Valley had approximately $508.3 million in assets and operated nine branches in Hunterdon and Mercer counties in New Jersey.

Summary Of Significant Accoun26

Summary Of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Plan Of Conversion And Reorganization	Plan of Conversion and Reorganization On June 6, 2012, the Board of Trustees of Northfield Bancorp, MHC (MHC) and the Board of Directors of the Company adopted a Plan of Conversion and Reorganization (the Plan). Pursuant to the Plan, the MHC converted from the mutual holding company form of organization to the fully public form on January 24, 2013. The MHC merged into the Company, and the MHC no longer exists. The Company merged into a new Delaware corporation named Northfield Bancorp, Inc. As part of the conversion, the MHC’s ownership interest of the Company was offered for sale in a public offering. The existing publicly held shares of the Company, which represented the remaining ownership interest in the Company, were exchanged for new shares of common stock of Northfield Bancorp, Inc., the new Delaware corporation. The exchange ratio ensured that immediately after the conversion and public offering, the public shareholders of the Company owned the same aggregate percentage of Northfield Bancorp., Inc. common stock that they owned immediately prior to that time (excluding shares purchased in the stock offering and cash received in lieu of fractional shares). When the conversion and public offering was completed, all of the capital stock of Northfield Bank was owned by Northfield Bancorp, Inc., the Delaware corporation. The Plan provided for the establishment of special “liquidation accounts” for the benefit of certain depositors of Northfield Bank in an amount equal to the greater of the MHC’s ownership interest in the retained earnings of the Company as of the date of the latest balance sheet contained in the prospectus or the retained earnings of Northfield Bank at the time it reorganized into the MHC. Following the completion of the conversion, under the rules of the Board of Governors of the Federal Reserve System, Northfield Bank is not permitted to pay dividends on its capital stock to Northfield Bancorp, Inc., its sole shareholder, if Northfield Bank’s shareholder’s equity would be reduced below the amount of the liquidation accounts. The liquidation accounts will be reduced annually to the extent that eligible account holders have reduced their qualifying deposits. Subsequent increases in qualifying deposits will not restore an eligible account holder’s interest in the liquidation accounts.
Basis Of Presentation	Basis of Presentation The consolidated financial statements are comprised of the accounts of Northfield Bancorp, Inc. and its wholly owned subsidiaries, Northfield Investment, Inc. and Northfield Bank (the Bank), and the Bank’s wholly-owned significant subsidiaries, NSB Services Corp. and NSB Realty Trust. All significant intercompany accounts and transactions have been eliminated in consolidation. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheets and revenues and expenses during the reporting periods. Actual results may differ significantly from those estimates and assumptions. A material estimate that is particularly susceptible to significant change in the near term is the allowance for loan losses. In connection with the determination of this allowance, management generally obtains independent appraisals for significant properties. In addition, judgments related to the amount and timing of expected cash flows from PCI loans, goodwill, securities valuation and impairment, and deferred income taxes, involve a higher degree of complexity and subjectivity and require estimates and assumptions about highly uncertain matters. Actual results may differ from the estimates and assumptions. Certain prior year balances have been reclassified to conform to the current year presentation.
Business	Business The Company, through its principal subsidiary, the Bank, provides a full range of banking services primarily to individuals and corporate customers in Richmond and Kings counties in New York, and Hunterdon, Mercer, Union and Middlesex counties in New Jersey. The Company is subject to competition from other financial institutions and to the regulations of certain federal and state agencies, and undergoes periodic examinations by those regulatory authorities.
Cash Equivalents	Cash Equivalents Cash equivalents consist of cash on hand, due from banks, and interest-bearing deposits in other financial institutions with an original term of three months or less.
Securities	Securities Securities are classified at the time of purchase, based on management’s intention, as securities held-to-maturity, securities available-for-sale, or trading account securities. Securities held-to-maturity are those that management has the positive intent and ability to hold until maturity. Securities held-to-maturity are carried at amortized cost, adjusted for amortization of premiums and accretion of discounts using the level-yield method over the contractual term of the securities, adjusted for actual prepayments. Securities available-for-sale represents all securities not classified as either held-to-maturity or trading. Securities available-for-sale are carried at estimated fair value with unrealized holding gains and losses (net of related tax effects) on such securities excluded from earnings, but included as a separate component of stockholders’ equity, titled “Accumulated other comprehensive income (loss).” The cost of securities sold is determined using the specific-identification method. Security transactions are recorded on a trade-date basis. Trading securities are securities that are bought and may be held for the purpose of selling them in the near term. Trading securities are reported at estimated fair value, with unrealized holding gains and losses reported as a component of gain (loss) on securities transactions, net in non-interest income. Our evaluation of other-than-temporary impairment considers our assessments of the reason for the decline in value, the duration and severity of the impairment, our intent and ability to hold the securities (as well as the likelihood of a near-term recovery), and our intent to sell the securities and whether it is more likely than not that we will be required to sell the securities before the recovery of their amortized cost basis. If a determination is made that a debt security is other-than-temporarily impaired, the Company will estimate the amount of the unrealized loss that is attributable to credit and all other non-credit related factors. If we intend to hold securities in an unrealized loss position until the loss is recovered, which may be at maturity, the credit related component will be recognized as an other-than-temporary impairment charge in non-interest income. The non-credit related component will be recorded as an adjustment to accumulated other comprehensive income (loss), net of tax. The estimated fair value of debt securities, including mortgage-backed securities and corporate debt obligations is furnished by an independent third-party pricing service. The third-party pricing service primarily utilizes pricing models and methodologies that incorporate observable market inputs, including among other things, benchmark yields, reported trades, and projected prepayment and default rates. Management reviews the data and assumptions used in pricing the securities by its third-party provider for reasonableness.
Loans	Loans The accounting and reporting for PCI loans and loans transferred to held-for-sale differs substantially from those loans originated and classified by the Company as held-for-investment. For purposes of reporting, discussion and analysis, management has classified its loan portfolio into four categories: (1) loans originated by the Company and held-for-sale, which are carried at the lower of aggregate cost or estimated fair value, less costs to sell, and therefore have no associated allowance for loan losses, (2) PCI loans, which are held-for-investment, and initially valued at estimated fair value on the date of acquisition, with no initial related allowance for loan losses, (3) originated loans held-for-investment, which are carried at amortized cost, less net charge-offs and the allowance for loan losses, and (4) acquired loans with no evidence of credit deterioration, which are held-for-investment, and initially valued at an estimated fair value on the date of acquisition, with no initial related allowance for loan losses. Originated and acquired net loans held-for-investment are stated at unpaid principal balance, adjusted by unamortized premiums and unearned discounts, deferred origination fees and certain direct origination costs, and the allowance for loan losses. Interest income on loans is accrued and credited to income as earned. Net loan origination fees/costs are deferred and accreted/amortized to interest income over the loan’s contractual life using the level-yield method, adjusted for actual prepayments. Generally, loans held-for-sale are designated at time of origination and generally consist of newly originated fixed rate residential loans and are recorded at the lower of aggregate cost or estimated fair value in the aggregate. Transfers of loans from held-for-investment to held-for-sale are infrequent and occur at fair value less costs to sell, with any charge-off to allowance for loan losses. Gains are recognized on a settlement-date basis and are determined by the difference between the net sales proceeds and the carrying value of the loans, including any net deferred fees or costs. Originated and acquired net loans held-for-investment are deemed impaired when it is probable, based on current information, that the Company will not collect all amounts due in accordance with the contractual terms of the loan agreement. The Company has defined the population of originated and acquired impaired loans to be all originated and acquired non-accrual loans held-for-investment with an outstanding balance of $500,000 or greater and all loans restructured in troubled debt restructurings (TDRs). Originated and acquired impaired loans held-for-investment are individually assessed to determine that the loan’s carrying value is not in excess of the expected future cash flows, discounted at the loan's original effective interest rate, or the underlying collateral (less estimated costs to sell) if the loan is collateral dependent. Impairments, if any, are recognized through a charge to the provision for loan losses for the amount that the loan’s carrying value exceeds the discounted cash flow analysis or estimated fair value of collateral (less estimated costs to sell) if the loan is collateral dependent. Such amounts are charged-off when considered appropriate. Homogeneous loans with balances less than $500,000 , which are not considered TDRs, are collectively evaluated for impairment. The allowance for loan losses is increased by the provision for loan losses charged against income and is decreased by charge-offs, net of recoveries. Loan losses are charged-off in the period the loans, or portion thereof, are deemed uncollectible. Generally, the Company will record a loan charge-off (including a partial charge-off) to reduce a loan to the estimated fair value of the underlying collateral, less cost to sell, if it is determined that it is probable that recovery will come primarily from the sale or operation of such collateral. Specific reserves on impaired loans that are not considered collateral dependent are charged-off when such amounts are not considered to be collectible. The provision for loan losses is based on management’s evaluation of the adequacy of the allowance that considers, among other things, impaired loans held-for-investment, deterioration in PCI loans subsequent to acquisition, past loan loss experience, known and inherent risks in the portfolio, and existing adverse situations that may affect borrowers’ ability to repay. Additionally, management evaluates changes, if any, in underwriting standards, collection, charge-off and recovery practices, the nature or volume of the portfolio, lending staff, concentration of loans, as well as current economic conditions, and other relevant factors. Management believes the allowance for loan losses is adequate to provide for probable and reasonably estimable incurred losses at the date of the consolidated balance sheets. The Company also maintains an allowance for estimated losses on off-balance sheet credit risks related to loan commitments and standby letters of credit. Management utilizes a methodology similar to its allowance for loan loss adequacy methodology to estimate losses on these commitments. The allowance for estimated credit losses on off-balance sheet commitments is included in other liabilities and any changes to the allowance are recorded as a component of other non-interest expense. While management uses available information to estimate probable and reasonably estimable incurred losses on loans, future additions may be necessary based on changes in conditions, including changes in economic conditions, particularly in Richmond and Kings counties in New York, and Hunterdon, Mercer, Union and Middlesex counties in New Jersey and to a lesser extent Eastern Pennsylvania. Accordingly, as with most financial institutions in the market area, the ultimate collectability of a substantial portion of the Company’s loan portfolio is susceptible to changes in conditions in the Company’s marketplace. In addition, future changes in laws and regulations could make it more difficult for the Company to collect all contractual amounts due on its loans and mortgage-backed securities. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses. Such agencies may require the Company to recognize additions to the allowance based on their judgments about information available to them at the time of their examination. TDRs are loans where terms have been modified because of deterioration in the financial condition of the borrower. Modifications could include extension of the repayment terms of the loan, reduced interest rates, or forgiveness of accrued interest and/or principal. Once an obligation has been restructured because of such credit problems, it continues to be considered restructured until paid in full or, if the obligation yields a market rate (a rate equal to the rate the Company was willing to accept at the time of the restructuring for a new loan with comparable risk), until the year subsequent to the year in which the restructuring takes place, provided the borrower has performed under the modified terms for a six-month period. The Company records an impairment charge equal to the difference between the present value of estimated future cash flows under the restructured terms discounted at the original loan’s effective interest rate, or the underlying collateral value less costs to sell, if the loan is collateral dependent. Changes in present values attributable to the passage of time are recorded as a component of the provision for loan losses. A loan is considered past due when it is not paid in accordance with its contractual terms. The accrual of income on loans, including impaired loans held-for-investment, and other loans in the process of foreclosure, is generally discontinued when a loan becomes 90 days or more delinquent, or sooner when certain factors indicate that the ultimate collection of principal and interest is in doubt. Loans on which the accrual of income has been discontinued are designated as non-accrual loans. All previously accrued interest is reversed against interest income, and income is recognized subsequently only in the period that cash is received, provided no principal payments are due and the remaining principal balance outstanding is deemed collectible. A non-accrual loan is not returned to accrual status until both principal and interest payments are brought current and factors indicating doubtful collection no longer exist, including performance by the borrower under the loan terms for a consecutive six-month period. The Company accounts for the PCI loans based on expected cash flows. In accordance with current accounting guidance, the Company will maintain the integrity of a pool of multiple loans accounted for as a single asset and evaluate the pools for impairment, and accrual status, based on variances from the expected cash flows.
Federal Home Loan Bank Stock	Federal Home Loan Bank Stock The Bank, as a member of the Federal Home Loan Bank (FHLB) of New York, is required to hold shares of capital stock in the FHLB as a condition to both becoming a member and engaging in certain transactions with the FHLB. The minimum investment requirement is determined by a “membership” investment component and an “activity-based” investment component. The membership investment component is the greater of 0.20% of the Bank’s mortgage-related assets, as defined by the FHLB, or $1,000 . The activity-based investment component is equal to 4.5% of the Bank’s outstanding advances with the FHLB. The activity-based investment component also considers other transactions, including assets originated for or sold to the FHLB, and delivery commitments issued by the FHLB. The Company currently does not enter into these other types of transactions with the FHLB. On a quarterly basis, we perform our other-than-temporary impairment analysis of FHLB stock, we evaluate, among other things, (i) its earnings performance, including the significance of any decline in net assets of the FHLB as compared to the regulatory capital amount of the FHLB, (ii) the commitment by the FHLB to continue dividend payments, and (iii) the liquidity position of the FHLB. We did not consider our investment in FHLB stock to be other-than-temporarily impaired at December 31, 2015 , and 2014 .
Premises And Equipment, Net	Premises and Equipment, Net Premises and equipment, including leasehold improvements, are carried at cost, less accumulated depreciation and amortization. Depreciation and amortization of premises and equipment, including capital leases, are computed on a straight-line basis over the estimated useful lives of the related assets. The estimated useful lives of significant classes of assets are generally as follows: buildings - forty years; furniture and equipment - five to seven years; and purchased computer software - three years. Leasehold improvements are amortized over the shorter of the term of the related lease or the estimated useful lives of the improvements. Major improvements are capitalized, while repairs and maintenance costs are charged to operations as incurred. Upon retirement or sale, any gain or loss is credited or charged to operations.
Bank Owned Life Insurance	Bank Owned Life Insurance The Company has purchased bank owned life insurance contracts to help fund its obligations for certain employee benefit costs. The Company’s investment in such insurance contracts has been reported in the consolidated balance sheets at their cash surrender values. Changes in cash surrender values and death benefit proceeds received in excess of the related cash surrender values are recorded as non-interest income.
Goodwill	Goodwill Intangible assets resulting from acquisitions under the purchase method of accounting consist of goodwill and other intangible assets. Goodwill is not amortized and is subject to an annual assessment for impairment. The goodwill impairment analysis is generally a two-step test. However, under current accounting guidance, first we may assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. Under current accounting guidance, we are not required to calculate the fair value of a reporting unit if, based on a qualitative assessment, we determine that it was more likely than not that the unit’s fair value was not less than its carrying amount. During 2015 , we elected to perform step one of the two-step goodwill impairment test for our reporting unit, but we may choose to perform the optional quantitative assessment in future periods. Goodwill is allocated to Northfield’s reporting unit at the date goodwill is actually recorded. If the carrying value of a reporting unit exceeds its estimated fair value, a second step in the analysis is performed to determine the amount of impairment, if any. The second step compares the implied fair value of the reporting unit’s goodwill with the carrying amount of that goodwill. If the carrying value of a reporting unit exceeds the implied fair value of the goodwill, an impairment charge is recorded equal to the excess amount in the current period earnings. As of December 31, 2015 , the carrying value of goodwill totaled $16.2 million . The Company performed its annual goodwill impairment test, as of December 31, 2015 , and determined that the fair value of the Company’s single reporting unit to be in excess of its carrying value. The Company will test goodwill for impairment between annual test dates if an event occurs or circumstances change that would indicate the fair value of the reporting unit is below its carrying amount. No events have occurred and no circumstances have changed since the annual impairment test date that would indicate the fair value of the reporting unit is below its carrying amount.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply in the year in which those temporary differences are expected to be recovered or settled. When applicable, deferred tax assets are reduced by a valuation allowance for any portions determined not likely to be realized. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Income tax benefits are recognized and measured based upon a two-step model: 1) a tax position must be more-likely-than-not to be sustained based solely on its technical merits in order to be recognized, and 2) the benefit is measured as the largest dollar amount of that position that is more-likely-than-not to be sustained upon settlement. The difference between the benefit recognized and the tax benefit claimed on a tax return is referred to as an unrecognized tax benefit. The Company records income tax-related interest and penalties, if applicable, within income tax expense.
Impairment Of Long-Lived Assets	Impairment of Long-Lived Assets Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future undiscounted (and without interest) net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less costs to sell.
Securities Sold Under Agreements To Repurchase And Other Borrowings	Securities Sold Under Agreements to Repurchase and Other Borrowings The Company enters into sales of securities under agreements to repurchase (Repurchase Agreements) and collateral pledge agreements (Pledge Agreements) with selected dealers and banks. Such agreements are accounted for as secured financing transactions since the Company maintains effective control over the transferred or pledged securities and the transfer meets the other accounting and recognition criteria as required by the transfer and servicing topic of the Financial Accounting Standards Board (FASB) Accounting Standards. Obligations under these agreements are reflected as a liability in the consolidated balance sheets. Securities underlying the agreements are maintained at selected dealers and banks as collateral for each transaction executed and may be sold or pledged by the counterparty. Collateral underlying Repurchase Agreements that permit the counterparty to sell or pledge the underlying collateral is disclosed on the consolidated balance sheets as “encumbered.” The Company retains the right under all Repurchase Agreements and Pledge Agreements to substitute acceptable collateral throughout the terms of the agreement.
Comprehensive Income (Loss)	Comprehensive Income (Loss) Comprehensive income (loss) includes net income and the change in unrealized holding gains and losses on securities available-for-sale, change in actuarial gains and losses on other post retirement benefits, and change in service cost on other postretirement benefits, net of taxes. Comprehensive income (loss) is presented in the Consolidated Statements of Comprehensive Income (Loss).
Benefits	Benefits The Company sponsors a defined postretirement benefit plan that provides for medical and life insurance coverage to a limited number of retirees, as well as life insurance to all qualifying employees of the Company. The estimated cost of postretirement benefits earned is accrued during an individual’s estimated service period to the Company. The Company recognizes in its balance sheet the over-funded or under-funded status of a defined benefit postretirement plan measured as the difference between the fair value of plan assets and the benefit obligation at the end of our calendar year. The actuarial gains and losses and the prior service costs and credits that arise during the period are recognized as a component of other comprehensive income (loss), net of tax. 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. The Company’s common stock not yet allocated to participants is recorded as a reduction of stockholders’ equity at cost. The Company records compensation expense related to the ESOP at an amount equal to the shares committed to be released by the ESOP multiplied by the average fair value of our common stock during the reporting period. The Company recognizes the grant-date fair value of stock based awards issued to participants' as compensation cost in the consolidated statements of comprehensive income (loss). The fair value of common stock awards is based on the closing price of our common stock as reported on the NASDAQ Stock Market on the grant date. The expense related to stock options is based on the estimated fair value of the options at the date of the grant using the Black-Scholes pricing model. The awards are fixed in nature and compensation cost related to stock based awards is recognized on a straight-line basis over the requisite service periods. The Bank has a 401(k) plan covering substantially all employees. Contributions to the plan are expensed as incurred.
Segment Reporting	Segment Reporting As a community-focused financial institution, substantially all of the Company’s operations involve the delivery of loan and deposit products to customers. Management makes operating decisions and assesses performance based on an ongoing review of these community banking operations, which constitute the Company’s only operating segment for financial reporting purposes.
Net Income per Common Share	Net Income per Common Share Net income per common share-basic is computed by dividing the net income available to common stockholders by the weighted average number of common shares outstanding, excluding unallocated ESOP shares and unearned common stock award shares. The weighted average common shares outstanding includes the average number of shares of common stock outstanding, including shares allocated or committed to be released ESOP shares. Net income per common share-diluted is computed using the same method as basic earnings per share, but reflects the potential dilution that could occur if stock options and unvested shares of restricted stock were exercised and converted into common stock. These potentially dilutive shares are included in the weighted average number of shares outstanding for the period using the treasury stock method. When applying the treasury stock method, we add: (1) the assumed proceeds from option exercises; (2) the tax benefit, if any, that would be credited to additional paid-in capital assuming exercise of non-qualified stock options and vesting of shares of restricted stock; and (3) the average unamortized compensation costs related to unvested shares of restricted stock and stock options. We then divide this sum by our average stock price for the period to calculate assumed shares repurchased. The excess of the number of shares issuable over the number of shares assumed to be repurchased is added to basic weighted average common shares to calculate diluted earnings per share.
Other Real Estate Owned	Other Real Estate Owned Assets acquired through loan foreclosure, or deed-in-lieu of, are held for sale and are initially recorded at estimated fair value less estimated selling costs when acquired, thus establishing a new cost basis. Costs after acquisition are generally expensed. If the estimated fair value of the asset subsequently declines, a write-down is recorded through other non-interest expense.
Recent Accounting Developments	Recent Accounting Developments In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02, Leases (Topic 842), which is intended to increase transparency and comparability of accounting for lease transactions. The ASU will require all leases to be recognized on the balance sheet as lease assets and lease liabilities and will require both quantitative and qualitative disclosures regarding key information about leasing arrangements. Lessor accounting is largely unchanged. The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that reporting period. The Company is currently evaluating the potential effect of adoption of this pronouncement on its consolidated financial statements. In January 2016, In January 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , which addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The guidance primarily affects the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. In addition, the FASB clarified guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. The accounting for other financial instruments, such as loans, investments in debt securities, and financial liabilities is largely unchanged. ASU No. 2016-01 is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The adoption of this pronouncement is not expected to have a material effect on the Company's consolidated financial statements. In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805) - Simplifying the Accounting for Measurement-Period Adjustments, which requires that adjustments to provisional amounts that are identified during the measurement period of a business combination be recognized in the reporting period in which the adjustment amounts are determined. Furthermore, the income statement effects of such adjustments, if any, must be calculated as if the accounting had been completed at the acquisition date. Under previous guidance, adjustments to provisional amounts identified during the measurement period were to be recognized retrospectively. ASU 2015-16 is effective for annual reporting periods beginning after December 15, 2015, including interim periods within that reporting period. The adoption of this pronouncement is not expected to have a material effect on the Company's consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in ASC Topic 605, Revenue Recognition , and most industry-specific guidance throughout the industry topics of the codification. This update will be effective for interim and annual periods beginning after December 15, 2016. The Company is still assessing the impact of this pronouncement on its consolidated financial statements, but does not expect the guidance to have a material effect on its consolidated financial statements. In January 2014, the FASB issued ASU No. 2014-04, Receivables - Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure, which clarifies that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (i) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (ii) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the ASU requires interim and annual disclosure of both the amount of foreclosed residential real estate property held by the creditor and the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. ASU No. 2014-04 was effective for annual and interim periods beginning after December 15, 2014 and the adoption of this pronouncement did not have a material effect on the Company’s consolidated financial statements. In December 2012, the FASB issued a proposed ASU, Financial Instruments - Credit Losses. This proposed ASU was issued for public comment in order to allow stakeholders the opportunity to review the proposal and provide comments to the FASB and does not constitute accounting guidance until a final ASU is issued. The FASB expects to publish the final guidance in early 2016 and it will be effective for public entities beginning on or after December 15, 2018, including interim periods within that reporting period. The FASB’s proposed model would utilize an “expected credit loss” measurement objective for the recognition of credit losses for loans, held-to-maturity securities and other receivables at the time the financial asset is originated or acquired and adjusted each period for changes in expected credit losses. For available-for-sale securities where fair value is less than cost, credit-related impairment would be recognized in an allowance for credit losses and adjusted each period for changes in credit risk. This would replace the multiple existing impairment models in U.S. GAAP, which generally require that a loss be incurred before it is recognized. The Company will assess the impact of the FASB’s final ASU on its financial statements when it is issued.

Securities Available-For-Sale (

Securities Available-For-Sale (Tables)	12 Months Ended
	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Comparative Summary Of Mortgage-Backed Securities And Other Securities Available-For-Sale	The following is a comparative summary of mortgage-backed securities and other securities available-for-sale at December 31, 2015 and 2014 (in thousands): 2015 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises (GSE) $ 228,557 $ 4,673 $ 1,530 $ 231,700 Real estate mortgage investment conduits (REMICs): GSE 305,387 647 8,210 297,824 Non-GSE 597 — 18 579 534,541 5,320 9,758 530,103 Other securities: Equity investments-mutual funds 481 — — 481 Corporate bonds 11,002 9 — 11,011 11,483 9 — 11,492 Total securities available-for-sale $ 546,024 $ 5,329 $ 9,758 $ 541,595 2014 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: GSE $ 292,162 $ 8,309 $ 1,131 $ 299,340 REMICs: GSE 408,328 1,314 9,192 400,450 Non-GSE 1,060 — 34 1,026 701,550 9,623 10,357 700,816 Other securities: Equity investments-mutual funds 410 — — 410 Corporate bonds 69,975 40 2 70,013 70,385 40 2 70,423 Total securities available-for-sale $ 771,935 $ 9,663 $ 10,359 $ 771,239
Summary Of Expected Maturity Distribution Of Debt Securities Available-For-Sale, Other Than Mortgage-Backed Securities	The following is a summary of the expected maturity distribution of debt securities available-for-sale other than mortgage-backed securities at December 31, 2015 (in thousands): Available-for-sale Amortized cost Estimated fair value Due in one year or less $ 11,002 $ 11,011 Due after one year through five years — — $ 11,002 $ 11,011
Gross Unrealized Losses On Mortgage-Backed Securities	Gross unrealized losses on mortgage-backed securities, equity securities, agency bonds, and corporate bonds available-for-sale, and the estimated fair value of the related securities, aggregated by security category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2015 and 2014 , were as follows (in thousands): December 31, 2015 Less than 12 months 12 months or more Total Unrealized Estimated Unrealized Estimated Unrealized Estimated losses fair value losses fair value losses fair value Mortgage-backed securities: Pass-through certificates: GSE $ 115 $ 14,424 $ 1,415 $ 52,120 $ 1,530 $ 66,544 REMICs: GSE 338 31,937 7,872 164,666 8,210 196,603 Non-GSE 18 579 18 579 Total $ 453 $ 46,361 $ 9,305 $ 217,365 $ 9,758 $ 263,726 December 31, 2014 Less than 12 months 12 months or more Total Unrealized Estimated Unrealized Estimated Unrealized Estimated losses fair value losses fair value losses fair value Mortgage-backed securities: Pass-through certificates: GSE $ 1 $ 181 $ 1,130 $ 61,526 $ 1,131 $ 61,707 REMICs: GSE 30 3,179 9,162 229,896 9,192 233,075 Non-GSE — — 34 1,026 34 1,026 Other securities: Corporate bonds 2 9,996 — — 2 9,996 Total $ 33 $ 13,356 $ 10,326 $ 292,448 $ 10,359 $ 305,804

Securities Held-To-Maturity (Ta

Securities Held-To-Maturity (Tables)	12 Months Ended
	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Summary Of Mortgage-Backed Securities Held-To-Maturity	The following is a summary of mortgage-backed securities held-to-maturity at December 31, 2015 (in thousands): 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 10,346 $ 53 $ 30 $ 10,369 Total securities held-to-maturity $ 10,346 $ 53 $ 30 $ 10,369 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 3,609 $ 82 $ — $ 3,691 Total securities held-to-maturity $ 3,609 $ 82 $ — $ 3,691

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Net Loans Held-For-Investment	Loans held-for-investment, net, consists of the following (in thousands): December 31, 2015 2014 Real estate loans: Multifamily $ 1,318,461 $ 1,072,193 Commercial mortgage 402,073 390,288 One-to-four family residential mortgage 98,332 74,401 Home equity and lines of credit 61,413 54,533 Construction and land 18,652 21,412 Total real estate loans 1,898,931 1,612,827 Commercial and industrial loans 25,554 12,945 Other loans 2,256 2,157 Total commercial and industrial and other loans 27,810 15,102 Deferred loan cost, net 4,844 4,565 Originated loans held-for-investment, net 1,931,585 1,632,494 PCI Loans 33,115 44,816 Loans acquired: One-to-four family residential mortgage 330,672 234,478 Multifamily 64,779 18,844 Commercial mortgage 11,160 11,999 Home equity and lines of credit 2,404 — Construction and land — 364 Total loans acquired 409,015 265,685 Loans held for investment, net 2,373,715 1,942,995 Allowance for loan losses (24,770 ) (26,292 ) Net loans held-for-investment $ 2,348,945 $ 1,916,703
Summary Of Changes In Accretable Yields Of Acquired Loans	The following details the accretable yield (in thousands): For The Year Ended December 31, 2015 2014 Balance at the beginning of year $ 27,943 $ 32,464 Accretable yield at purchase date — — Accretion into interest income (4,525 ) (4,895 ) Net reclassification (to)/from non-accretable difference (1) (565 ) 374 Balance at end of year $ 22,853 $ 27,943 (1) Due to re-casting of cash flows for loan pools acquired in the 2011 FDIC-assisted transaction.
Activity In Allowance For Loan Losses	A summary of changes in the allowance for loan losses for the years ended December 31, 2015 , 2014 , and 2013 follows (in thousands): December 31, 2015 2014 2013 Balance at beginning of year $ 26,292 $ 26,037 $ 26,424 Provision for loan losses 353 645 1,927 Recoveries 140 402 860 Charge-offs (2,015 ) (792 ) (3,174 ) Balance at end of year $ 24,770 $ 26,292 $ 26,037
Allowance For Loan Losses And Loans Receivable By Portfolio Segment	The following table sets forth activity in our allowance for loan losses, by loan type, for the years ended December 31, 2015 and 2014 . The following table also details the amount of loans receivable held-for-investment, net of deferred loan fees and costs, that are evaluated individually, and collectively, for impairment, and the related portion of allowance for loan losses that is allocated to each loan portfolio segment (in thousands): December 31, 2015 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Unallocated Originated Loans Total PCI Acquired Loans Total Allowance for loan losses: Beginning Balance $ 9,309 $ 951 $ 266 $ 12,219 $ 901 $ 841 $ 134 $ 1,209 $ 25,830 $ 400 $ 62 $ 26,292 Charge-offs (1,431 ) (277 ) — (120 ) (115 ) (71 ) (1 ) — (2,015 ) — — (2,015 ) Recoveries 2 20 — 25 42 34 17 — 140 — — 140 Provisions (credit) (774 ) 93 (5 ) 263 (33 ) 484 5 (116 ) (83 ) 383 53 353 Ending Balance $ 7,106 $ 787 $ 261 $ 12,387 $ 795 $ 1,288 $ 155 $ 1,093 $ 23,872 $ 783 $ 115 $ 24,770 Ending balance: individually evaluated for impairment $ 394 $ 167 $ — $ 158 $ 51 $ 4 $ — $ — $ 774 $ — $ 115 $ 889 Ending balance: collectively evaluated for impairment $ 6,712 $ 620 $ 261 $ 12,229 $ 744 $ 1,284 $ 155 $ 1,093 $ 23,098 $ 783 $ — $ 23,881 Loans, net: Ending Balance $ 402,714 $ 99,010 $ 18,677 $ 1,320,724 $ 62,594 $ 25,610 $ 2,256 $ — $ 1,931,585 $ 33,115 $ 409,015 $ 2,373,715 Ending balance: individually evaluated for impairment $ 20,465 $ 2,344 $ — $ 2,458 $ 354 $ 116 $ — $ — $ 25,737 $ — $ 3,250 $ 28,987 Ending balance: collectively evaluated for impairment $ 382,249 $ 96,666 $ 18,677 $ 1,318,266 $ 62,240 $ 25,494 $ 2,256 $ — $ 1,905,848 $ 33,115 $ 405,765 $ 2,344,728 December 31, 2014 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Unallocated Originated Loans Total PCI Acquired Loans Total Allowance for loan losses: Beginning Balance $ 12,619 $ 875 $ 205 $ 9,374 $ 860 $ 425 $ 67 $ 1,024 $ 25,449 $ 588 $ — $ 26,037 Charge-offs (103 ) (58 ) — (7 ) (489 ) (135 ) — — (792 ) — — (792 ) Recoveries 72 — 246 35 — 8 41 — 402 — — 402 Provisions (credit) (3,279 ) 134 (185 ) 2,817 530 543 26 185 771 (188 ) 62 645 Ending Balance $ 9,309 $ 951 $ 266 $ 12,219 $ 901 $ 841 $ 134 $ 1,209 $ 25,830 $ 400 $ 62 $ 26,292 Ending balance: individually evaluated for impairment $ 2,361 $ 57 $ — $ 215 $ 13 $ 109 $ — $ — $ 2,755 $ — $ 62 $ 2,817 Ending balance: collectively evaluated for impairment $ 6,948 $ 894 $ 266 $ 12,004 $ 888 $ 732 $ 134 $ 1,209 $ 23,075 $ 400 $ — $ 23,475 Loans, net: Ending Balance $ 390,885 $ 74,990 $ 21,445 $ 1,074,539 $ 55,486 $ 12,992 $ 2,157 $ — $ 1,632,494 $ 44,816 $ 265,685 $ 1,942,995 Ending balance: individually evaluated for impairment $ 29,224 $ 1,072 $ — $ 1,990 $ 327 $ 806 $ — $ — $ 33,419 $ — $ 855 $ 34,274 Ending balance: collectively evaluated for impairment $ 361,661 $ 73,918 $ 21,445 $ 1,072,549 $ 55,159 $ 12,186 $ 2,157 $ — $ 1,599,075 $ 44,816 $ 264,830 $ 1,908,721
Investment Of Originated Loans Held-For-Investment, Net Of Deferred Fees And Costs, By Loan Type And Credit Quality Indicator	The following table details the recorded investment of originated loans receivable held-for-investment, net of deferred fees and costs, by loan type and credit quality indicator at December 31, 2015 and 2014 (in thousands): At December 31, 2015 Real Estate Multifamily Commercial One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total < 35% LTV => 35% LTV < 35% LTV => 35% LTV < 60% LTV => 60% LTV Internal Risk Rating Pass $ 124,678 $ 1,188,916 $ 52,253 $ 319,733 $ 48,429 $ 46,578 $ 18,677 $ 61,935 $ 24,846 $ 2,256 $ 1,888,301 Special Mention 51 3,832 974 2,966 504 — — 75 316 — 8,718 Substandard 775 2,472 1,233 25,555 2,112 1,387 — 584 448 — 34,566 Originated loans held-for-investment, net $ 125,504 $ 1,195,220 $ 54,460 $ 348,254 $ 51,045 $ 47,965 $ 18,677 $ 62,594 $ 25,610 $ 2,256 $ 1,931,585 At December 31, 2014 Real Estate Multifamily Commercial One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total < 35% LTV => 35% LTV < 35% LTV => 35% LTV < 60% LTV => 60% LTV Internal Risk Rating Pass $ 64,692 $ 999,708 $ 47,534 $ 289,794 $ 29,629 $ 40,527 $ 21,445 $ 54,935 $ 11,421 $ 2,157 $ 1,561,842 Special Mention 283 4,342 2,436 9,792 1,143 — — 360 652 — 19,008 Substandard 801 4,713 — 41,329 2,303 1,388 — 191 919 — 51,644 Originated loans held-for-investment, net $ 65,776 $ 1,008,763 $ 49,970 $ 340,915 $ 33,075 $ 41,915 $ 21,445 $ 55,486 $ 12,992 $ 2,157 $ 1,632,494
Estimated Expected Future Cash Flows Of Each PCI Loan Pool	The following table sets forth the detail, and delinquency status, of originated and acquired non-performing loans (non-accrual loans and loans past due ninety days or more and still accruing), net of deferred fees and costs, at December 31, 2015 and 2014 (in thousands), excluding PCI loans which have been segregated into pools. For PCI loans, each loan pool is accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows. At December 31, 2015 Total Non-Performing Loans Non-Accruing Loans 0-29 Days Past Due 30-89 Days Past Due 90 Days or More Past Due Total 90 Days or More Past Due and Accruing Total Non-Performing Loans Loans held-for-investment: Real estate loans: Commercial LTV => 35% Substandard 344 372 4,516 5,232 — 5,232 Total 344 372 4,516 5,232 — 5,232 Total commercial 344 372 4,516 5,232 — 5,232 One-to-four family residential LTV < 60% Substandard 364 180 565 1,109 — 1,109 Total 364 180 565 1,109 — 1,109 LTV => 60% Substandard 901 135 — 1,036 — 1,036 Total 901 135 — 1,036 — 1,036 Total one-to-four family residential 1,265 315 565 2,145 — 2,145 Construction and land Pass — — 113 113 — 113 Total construction and land — — 113 113 — 113 Multifamily LTV => 35% Substandard — — 559 559 — 559 Total multifamily — — 559 559 — 559 Home equity and lines of credit Substandard — — 329 329 — 329 Total home equity and lines of credit — — 329 329 — 329 Commercial and industrial loans Pass — — — — 15 15 Total commercial and industrial loans — — — — 15 15 Total non-performing loans held-for-investment 1,609 687 6,082 8,378 15 8,393 Loans acquired: One-to-four family residential LTV < 60% Substandard 429 — — 429 — 429 Total one-to-four family residential 429 — — 429 — 429 Total non-performing loans acquired 429 — — 429 — 429 Total non-performing loans $ 2,038 $ 687 $ 6,082 $ 8,807 $ 15 $ 8,822 At December 31, 2014 Total Non-Performing Loans Non-Accruing Loans 0-29 Days Past Due 30-89 Days Past Due 90 Days or More Past Due Total 90 Days or More Past Due and Accruing Total Non-Performing Loans Loans held-for-investment: Real estate loans: Commercial LTV => 35% Substandard — 395 10,769 11,164 — 11,164 Total commercial — 395 10,769 11,164 — 11,164 One-to-four family residential LTV < 60% Substandard — 190 674 864 286 1,150 Total — 190 674 864 286 1,150 LTV => 60% Substandard — — 1,028 1,028 — 1,028 Total — — 1,028 1,028 — 1,028 Total one-to-four family residential — 190 1,702 1,892 286 2,178 Home equity and lines of credit Substandard — 98 — 98 — 98 Total home equity and lines of credit — 98 — 98 — 98 Commercial and industrial loans Substandard — — 408 408 — 408 Total commercial and industrial loans — — 408 408 — 408 Other loans Pass — — — — — — Total other loans — — — — — — Total non-performing loans held-for-investment $ — $ 683 $ 12,879 $ 13,562 $ 286 $ 13,848 Loans acquired: One-to-four family residential LTV < 60% Pass — — — — 422 422 Substandard — — 313 313 — 313 Total one-to-four family residential — — 313 313 422 735 Total non-performing loans acquired — — 313 313 422 735 Total non-performing loans $ — $ 683 $ 13,192 $ 13,875 $ 708 $ 14,583
Detail and Delinquency Status of Originated Loans Held-For-Investment, Net Of Deferred Fees and Costs, By Performing And Non-Performing Loans	The following table sets forth the detail and delinquency status of originated and acquired loans, net of deferred fees and costs, by performing and non-performing loans at December 31, 2015 and 2014 (in thousands): December 31, 2015 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Loans held-for-investment: Real estate loans: Commercial LTV < 35% Pass $ 50,974 $ 1,279 $ 52,253 $ — $ 52,253 Special Mention 974 — 974 — 974 Substandard 1,233 — 1,233 — 1,233 Total 53,181 1,279 54,460 — 54,460 LTV => 35% Pass 319,411 322 319,733 — 319,733 Special Mention 2,966 — 2,966 — 2,966 Substandard 8,696 11,627 20,323 5,232 25,555 Total 331,073 11,949 343,022 5,232 348,254 Total commercial 384,254 13,228 397,482 5,232 402,714 One-to-four family residential LTV < 60% Pass 45,737 2,692 48,429 — 48,429 Special Mention 134 370 504 — 504 Substandard 696 307 1,003 1,109 2,112 Total 46,567 3,369 49,936 1,109 51,045 LTV => 60% Pass 46,578 — 46,578 — 46,578 Substandard — 351 351 1,036 1,387 Total 46,578 351 46,929 1,036 47,965 Total one-to-four family residential 93,145 3,720 96,865 2,145 99,010 Construction and land Pass 18,564 — 18,564 113 18,677 Total construction and land 18,564 — 18,564 113 18,677 Multifamily LTV < 35% Pass 124,678 — 124,678 — 124,678 Special Mention — 51 51 — 51 Substandard 775 — 775 — 775 Total 125,453 51 125,504 — 125,504 LTV= > 35% Pass 1,187,147 1,769 1,188,916 — 1,188,916 Special Mention 2,687 1,145 3,832 — 3,832 Substandard 1,913 — 1,913 559 2,472 Total 1,191,747 2,914 1,194,661 559 1,195,220 Total multifamily 1,317,200 2,965 1,320,165 559 1,320,724 Home equity and lines of credit Pass 61,561 374 61,935 — 61,935 Special Mention 75 — 75 — 75 Substandard 255 — 255 329 584 Total home equity and lines of credit 61,891 374 62,265 329 62,594 Commercial and industrial loans Pass 24,780 51 24,831 15 24,846 Special Mention 316 — 316 — 316 Substandard 395 53 448 — 448 Total commercial and industrial loans 25,491 104 25,595 15 25,610 December 31, 2015 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Other loans Pass 2,245 11 2,256 — 2,256 Total other loans 2,245 11 2,256 — 2,256 Total originated loans held-for-investment 1,902,790 20,402 1,923,192 8,393 1,931,585 Acquired loans: One-to-four family residential LTV < 60% Pass 313,425 312 313,737 — 313,737 Special Mention 549 — 549 — 549 Substandard 737 177 914 429 1,343 Total 314,711 489 315,200 429 315,629 LTV => 60% Pass 14,759 — 14,759 — 14,759 Substandard 284 — 284 — 284 Total 15,043 — 15,043 — 15,043 Total one-to-four family residential 329,754 489 330,243 429 330,672 Commercial LTV < 35% Pass 2,164 — 2,164 — 2,164 Substandard — 729 729 — 729 Total 2,164 729 2,893 — 2,893 LTV => 35% Pass 5,536 — 5,536 — 5,536 Special Mention 883 — 883 — 883 Substandard 1,848 — 1,848 — 1,848 Total 8,267 — 8,267 — 8,267 Total commercial 10,431 729 11,160 — 11,160 Multifamily LTV < 35% Pass 4,695 — 4,695 — 4,695 Special Mention 138 — 138 — 138 Total 4,833 — 4,833 — 4,833 LTV => 35% Pass 59,632 — 59,632 — 59,632 Special Mention 314 — 314 — 314 Total 59,946 — 59,946 — 59,946 Total multifamily 64,779 — 64,779 — 64,779 Home equity and lines of credit Pass 2,404 — 2,404 — 2,404 Total home equity and lines of credit 2,404 — 2,404 — 2,404 Total loans acquired 407,368 1,218 408,586 429 409,015 $ 2,310,158 $ 21,620 $ 2,331,778 $ 8,822 $ 2,340,600 December 31, 2014 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Loans held-for-investment: Real estate loans: Commercial LTV < 35% Pass $ 47,534 $ — $ 47,534 $ — $ 47,534 Special Mention 2,436 — 2,436 — 2,436 Total 49,970 — 49,970 — 49,970 LTV => 35% Pass 288,915 878 289,793 — 289,793 Special Mention 9,792 — 9,792 — 9,792 Substandard 25,073 5,093 30,166 11,164 41,330 Total 323,780 5,971 329,751 11,164 340,915 Total commercial 373,750 5,971 379,721 11,164 390,885 One-to-four family residential LTV < 60% Pass 29,288 341 29,629 — 29,629 Special Mention 1,143 — 1,143 — 1,143 Substandard 867 286 1,153 1,150 2,303 Total 31,298 627 31,925 1,150 33,075 LTV => 60% Pass 38,062 2,465 40,527 — 40,527 Special Mention — — — — — Substandard — 360 360 1,028 1,388 Total 38,062 2,825 40,887 1,028 41,915 Total one-to-four family residential 69,360 3,452 72,812 2,178 74,990 Construction and land Pass 21,445 — 21,445 — 21,445 Special Mention — — — — — Substandard — — — — — Total construction and land 21,445 — 21,445 — 21,445 Multifamily LTV < 35% Pass 64,692 — 64,692 — 64,692 Special Mention 283 — 283 — 283 Substandard 801 — 801 — 801 Total 65,776 — 65,776 — 65,776 LTV => 35% Pass 999,469 239 999,708 — 999,708 Special Mention 3,822 520 4,342 — 4,342 Substandard 4,382 331 4,713 — 4,713 Total 1,007,673 1,090 1,008,763 — 1,008,763 Total multifamily 1,073,449 1,090 1,074,539 — 1,074,539 Home equity and lines of credit Pass 54,800 135 54,935 — 54,935 Special Mention 360 — 360 — 360 Substandard 93 — 93 98 191 Total home equity and lines of credit 55,253 135 55,388 98 55,486 Commercial and industrial loans Pass 11,331 90 11,421 — 11,421 Special Mention 652 — 652 — 652 Substandard 479 32 511 408 919 Total Commercial and industrial loans 12,462 122 12,584 408 12,992 Other loans December 31, 2014 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Pass 2,097 60 2,157 — 2,157 Total other loans 2,097 60 2,157 — 2,157 Total originated loans held-for-investment $ 1,607,816 $ 10,830 $ 1,618,646 $ 13,848 $ 1,632,494 Loans acquired: One-to-four family residential LTV < 60% Pass 225,741 526 226,267 422 226,689 Special Mention 597 — 597 — 597 Substandard 424 — 424 313 737 Total 226,762 526 227,288 735 228,023 LTV => 60% Pass 5,787 375 6,162 — 6,162 Substandard 294 — 294 — 294 Total 6,081 375 6,456 — 6,456 Total one-to-four family residential 232,843 901 233,744 735 234,479 Commercial LTV < 35% Pass 2,477 — 2,477 — 2,477 Special Mention 187 521 708 — 708 Total 2,664 521 3,185 — 3,185 LTV => 35% Pass 5,817 — 5,817 — 5,817 Substandard 2,997 — 2,997 — 2,997 Total 8,814 — 8,814 — 8,814 Total commercial 11,478 521 11,999 — 11,999 Construction and land Substandard 363 — 363 — 363 Total construction and land 363 — 363 — 363 Multifamily LTV < 35% Pass 4,857 — 4,857 — 4,857 Substandard 164 — 164 — 164 Total 5,021 — 5,021 — 5,021 LTV => 35% Pass 13,457 — 13,457 — 13,457 Special Mention 366 — 366 — 366 Total 13,823 — 13,823 — 13,823 Total multifamily 18,844 — 18,844 — 18,844 Total loans acquired 263,528 1,422 264,950 735 265,685 $ 1,871,344 $ 12,252 $ 1,883,596 $ 14,583 $ 1,898,179
Summary Of Impaired Loans	The following table summarizes the average recorded investment in originated and acquired impaired loans (excluding PCI loans) and interest recognized on impaired loans as of, and for, the years ended December 31, 2015 , and December 31, 2014 (in thousands): December 31, 2015 December 31, 2014 Average Recorded Investment Interest Income Average Recorded Investment Interest Income With No Allowance Recorded: Real estate loans: Commercial LTV < 35% Pass $ — $ — $ 681 $ — LTV => 35% Pass 2,938 184 6,615 149 Special Mention 109 — — — Substandard 12,593 884 9,641 500 Construction and land Substandard — — 22 — One-to-four family residential LTV < 60% Pass 207 9 13 2 Special Mention 55 — 213 7 Substandard 188 22 266 16 One-to-four family residential LTV => 60% Substandard 101 3 — 6 Multifamily LTV => 35% Pass 80 17 53 17 Substandard 688 27 714 27 Home equity and lines of credit Special Mention 29 — 20 3 Substandard — — 200 — Commercial and industrial loans Special Mention 59 — 144 19 Substandard 93 — 583 2 With a Related Allowance Recorded: Real estate loans: LTV => 35% Pass 668 — — — Special Mention — — 580 — Substandard 10,357 75 13,157 373 One-to-four family residential LTV < 60% Pass 263 19 — — Special Mention 127 — 259 8 Substandard 1,017 65 170 — LTV => 60% Special Mention 207 — — — Substandard 377 102 127 — Multifamily LTV => 35% Substandard 1,399 52 1,454 54 December 31, 2015 December 31, 2014 Average Recorded Investment Interest Income Average Recorded Investment Interest Income Home equity and lines of credit Pass 163 7 — — Special Mention 129 3 315 5 Substandard 25 2 200 — Commercial and industrial loans Special Mention 24 2 13 2 Substandard 82 — 414 — Total: Real estate loans Commercial 26,665 1,143 30,674 1,022 One-to-four family residential 2,542 220 1,048 39 Construction and land — — 22 — Multifamily 2,167 96 2,221 98 Home equity and lines of credit 346 12 735 8 Commercial and industrial loans 258 2 1,154 23 $ 31,978 $ 1,473 $ 35,854 $ 1,190 The following table summarizes originated and acquired (subsequent to acquisition) impaired loans as of December 31, 2015 and 2014 (in thousands): At December 31, 2015 December 31, 2014 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance Related Allowance With No Allowance Recorded: Real estate loans: Commercial LTV < 35% Substandard — 139 — — — — LTV => 35% Pass 4,051 4,188 — 3,311 3,448 — Substandard 13,371 14,748 — 12,880 14,339 — One-to-four family residential LTV < 60% Pass 221 221 — 66 66 — Special Mention — — — 138 138 — Substandard 234 234 — 262 262 — LTV => 60% Substandard 150 167 — Multifamily LTV => 35% Pass 75 545 — 86 557 — Substandard 1,012 1,012 — 477 477 — Home Equity Special Mention — — — 49 49 — Commercial and industrial loans Special Mention — — — 267 268 — Substandard 87 87 — 99 99 — With a Related Allowance Recorded: Real estate loans: Commercial LTV => 35% Substandard 4,891 5,430 (394 ) 13,033 14,365 (2,361 ) One-to-four family residential LTV < 60% Pass 503 503 (33 ) — — — Special Mention — — — 319 319 (4 ) Substandard 1,604 1,604 (152 ) 848 848 (95 ) LTV => 60% Special Mention 1,034 1,081 (97 ) — — — Substandard — — — 294 294 (20 ) Multifamily LTV => 35% Substandard 1,371 1,371 (158 ) 1,427 1,427 (215 ) Home equity and lines of credit Pass 269 269 (11 ) — — — Special Mention 44 44 (19 ) 278 278 (13 ) Substandard 41 41 (21 ) — — — Commercial and industrial loans Special Mention 29 29 (4 ) 32 32 (1 ) Substandard — — — 408 530 (108 ) Total: Real estate loans Commercial 22,313 24,505 (394 ) 29,224 32,152 (2,361 ) One-to-four family residential 3,746 3,810 (282 ) 1,927 1,927 (119 ) Multifamily 2,458 2,928 (158 ) 1,990 2,461 (215 ) Home equity and lines of credit 354 354 (51 ) 327 327 (13 ) Commercial and industrial loans 116 $ 116 (4 ) 806 929 (109 ) $ 28,987 $ 31,713 $ (889 ) $ 34,274 $ 37,796 $ (2,817 )
Summary Of Troubled Debt Restructuring	The following tables summarize loans that were modified in a troubled debt restructuring during the years ended December 31, 2015 and 2014 : Year Ended December 31, 2015 Pre-Modification Post-Modification Number of Outstanding Recorded Outstanding Recorded Relationships Investment Investment (Dollars in thousands) Commercial real estate loans Substandard 3 $ 8,957 $ 8,457 One-to-four Family Pass 1 20 $ 20 Substandard 8 1,889 $ 1,889 Home equity and lines of credit Substandard 1 43 $ 43 Total Troubled Debt Restructurings 13 $ 10,909 $ 10,409 One of the commercial real estate relationships in the table above, with a pre-modification outstanding recorded investment of $6.3 million , represents five loans to one borrower that were restructured into one loan, and then subsequently sold, during the year ended December 31, 2015 . These loans were restructured to provide partial forgiveness of debt, after the borrower made a $500,000 principal payment. The remaining relationships in the table above were restructured to receive reduced interest rates. Year Ended December 31, 2014 Pre-Modification Post-Modification Number of Outstanding Recorded Outstanding Recorded Relationships Investment Investment (Dollars in thousands) One-to-four Family Substandard 2 $ 556 $ 556 Total Troubled Debt Restructurings 2 $ 556 $ 556

Premises And Equipment, Net (Ta

Premises And Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Premises And Equipment Less Accumulated Depreciation And Amortization	At December 31, 2015 and 2014 , premises and equipment, less accumulated depreciation and amortization, consists of the following (in thousands): December 31, 2015 2014 At cost: Land $ 2,530 $ 2,026 Buildings and improvements 6,695 6,691 Capital leases 2,600 2,600 Furniture, fixtures, and equipment 19,954 19,658 Leasehold improvements 26,197 26,202 57,976 57,177 Accumulated depreciation and amortization (34,333 ) (30,951 ) Premises and equipment, net $ 23,643 $ 26,226

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2015
Banking and Thrift [Abstract]
Deposit Account Balances	Deposit account balances are summarized as follows (dollars in thousands): December 31, 2015 2014 Amount Weighted Average Rate Amount Weighted Average Rate Transaction: Negotiable orders of withdrawal $ 217,813 0.25 % $ 124,961 0.34 % Non-interest bearing checking 263,073 — 269,466 — Total transaction 480,886 0.11 394,427 0.11 Savings: Money market 548,132 0.62 440,887 0.38 Savings 524,043 0.47 432,207 0.31 Total savings 1,072,175 0.55 873,094 0.35 Certificates of deposit: Under $250,000 461,127 1.11 320,525 1.05 $250,000 or more 38,741 1.73 32,619 1.75 Total certificates of deposit 499,868 1.15 353,144 1.11 Total deposits $ 2,052,929 0.59 % $ 1,620,665 0.46 %
Maturities Of Certificates Of Deposit	Scheduled maturities of certificates of deposit are summarized as follows (in thousands): December 31, 2015 2016 $ 222,419 2017 68,452 2018 55,585 2019 75,574 2020 77,825 Thereafter 13 Total $ 499,868
Interest Expense On Deposits	Interest expense on deposits is summarized as follows (in thousands): December 31, 2015 2014 2013 Negotiable order of withdrawal and money market $ 2,816 $ 1,766 $ 1,956 Savings-passbook and statement 2,141 445 679 Certificates of deposit 5,466 3,180 3,866 $ 10,423 $ 5,391 $ 6,501

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Summary Of Borrowings	Borrowings consisted of securities sold under agreements to repurchase, FHLB advances, and obligations under capital leases and are summarized as follows (in thousands): December 31, 2015 2014 Repurchase agreements $ 63,000 $ 203,200 Other borrowings: FHLB advances 487,130 572,493 Floating rate advances 7,272 2,058 Obligations under capital leases 727 907 $ 558,129 $ 778,658
Contractual Maturities Repurchase Agreements And FHLB Advances	Repurchase agreements and FHLB advances have contractual maturities as follows (in thousands): December 31, 2015 FHLB Repurchase Advances Agreements 2016 $ 83,910 $ 55,000 2017 159,003 6,000 2018 140,715 2,000 2019 58,502 — 2020 45,000 — $ 487,130 $ 63,000
Summary Of Interest Expense On Borrowings	Interest expense on borrowings is summarized as follows (in thousands): December 31, 2015 2014 2013 Repurchase agreements $ 2,446 $ 4,161 $ 6,492 FHLB advances 6,742 5,717 3,836 Floating rate advances 17 3 10 Obligations under capital leases 60 80 109 $ 9,265 $ 9,961 $ 10,447

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	Income tax expense (benefit) consists of the following (in thousands): December 31, 2015 2014 2013 Federal tax expense (benefit): Current $ 11,796 $ 11,195 $ 12,493 Deferred (2,305 ) (1,675 ) (2,758 ) 9,491 9,520 9,735 State and local tax expense (benefit): Current 1,811 1,828 2,276 Deferred 673 508 (1,275 ) 2,484 2,336 1,001 Total income tax expense $ 11,975 $ 11,856 $ 10,736
Reconciliation Between The Amount Of Reported Total Income Tax Expense And The Amount Computed By Multiplying The Applicable Statutory Income Tax Rate	Reconciliation between the amount of reported total income tax expense and the amount computed by multiplying the applicable statutory income tax rate for the years ended December 31, 2015 , 2014 , and 2013 , is as follows (dollars in thousands): December 31, 2015 2014 2013 Tax expense at statutory rate of 35% $ 11,027 $ 11,242 $ 10,459 Increase (decrease) in taxes resulting from: State tax, net of federal income tax 1,615 1,519 651 Bank owned life insurance (1,319 ) (1,366 ) (1,262 ) Merger related costs 201 — — Incentive stock options 210 134 149 Uncertain tax position 51 131 448 Other, net 190 196 291 Income tax expense $ 11,975 $ 11,856 $ 10,736
Tax Effects Of Temporary Differences That Give Rise To Significant Portions Of The Deferred Tax Assets And Deferred Tax Liabilities	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2015 and 2014 , are as follows (in thousands): December 31, 2015 2014 Deferred tax assets: Allowance for loan losses $ 9,514 $ 10,302 Capitalized leases 287 369 Deferred compensation 2,450 2,577 Accrued salaries 910 950 Postretirement benefits 555 523 Equity awards 4,707 2,930 Unrealized actuarial losses on post retirement benefits 217 226 Straight-line leases adjustment 1,099 1,083 Asset retirement obligation 97 100 Reserve for accrued interest receivable 775 1,220 Reserve for loan commitments 127 184 Employee Stock Ownership Plan 532 308 Other 358 398 Depreciation 2,123 1,616 Fair value adjustments of acquired loans 7,105 6,247 Fair value adjustments of pension benefit obligations 267 306 Unrealized losses securities 1,780 291 Total gross deferred tax assets 32,903 29,630 Deferred tax liabilities: Fair value adjustments of acquired securities 9 13 Fair value adjustments of deposit liabilities 30 27 Deferred loan fees 1,777 1,639 Other 21 — Total gross deferred tax liabilities 1,837 1,679 Net deferred tax asset $ 31,066 $ 27,951
Schedule of Unrecognized Tax Benefits Roll Forward	A reconciliation of the Company’s uncertain tax positions are as follows (in thousands): December 31, 2015 2014 2013 Beginning balance $ 230 $ 679 $ 231 Settlements based on tax positions related to prior years — (580 ) — Additions based on tax positions related to prior years 51 131 448 Ending balance $ 281 $ 230 $ 679

Retirement Benefits (Tables)

Retirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Funded Status And Components Of Postretirement Benefit Costs	The following tables set forth the funded status and components of postretirement benefit costs at December 31 measurement dates (in thousands): 2015 2014 2013 Accumulated postretirement benefit obligation beginning of year $ 1,846 $ 1,294 $ 1,778 Service cost 9 6 9 Interest cost 62 53 56 Actuarial loss (gain) 149 578 (455 ) Benefits paid (116 ) (85 ) (94 ) Accumulated postretirement benefit obligation end of year 1,950 1,846 1,294 Accrued liability (included in accrued expenses and other liabilities) $ 1,950 $ 1,846 $ 1,294
Amounts Recognized In Accumulated Other Comprehensive Income (Loss)	The following table sets forth the amounts recognized in accumulated other comprehensive income (loss) (in thousands): December 31, 2015 2014 Net loss $ 578 $ 473 Transition obligation — 17 Prior service cost 12 50 Loss recognized in accumulated other comprehensive income $ 590 $ 540
Components Of Net Periodic Postretirement Benefit Cost	The following table sets forth the components of net periodic postretirement benefit costs for the years ended December 31, 2015 , 2014 , and 2013 (in thousands): December 31, 2015 2014 2013 Service cost $ 9 $ 6 $ 9 Interest cost 62 53 56 Amortization of transition obligation 17 17 17 Amortization of prior service costs 38 24 16 Amortization of unrecognized (gain) loss 44 (11 ) 36 Net postretirement benefit cost included in compensation and employee benefits $ 170 $ 89 $ 134
Defined Benefit Plan, Assumptions Used In Accounting For The Plan	The Company’s discount rate and rate of compensation increase used in accounting for the plan are as follows: 2015 2014 2013 Assumptions used to determine benefit obligation at period end: Discount rate 3.75 % 3.50 % 4.25 % Rate of increase in compensation 4.00 % 4.00 % 4.00 % Assumptions used to determine net periodic benefit cost for the year: Discount rate 3.50 % 4.25 % 3.25 % Rate of increase in compensation 4.00 % 4.00 % 4.00 %
Summary Of Percentage Point Change In Assumed Heath Care Cost Trends	A one percentage-point change in assumed heath care cost trends would have the following effects (in thousands): One Percentage Point Increase One Percentage Point Decrease 2015 2014 2015 2014 Effect on benefits earned and interest cost $ 6 $ 4 $ (4 ) $ (3 ) Effect on accumulated postretirement benefit obligation 156 153 (139 ) (135 ) A one percentage-point change in assumed heath care cost trends would have the following effects (in thousands): One Percentage Point Increase One Percentage Point Decrease 2015 2014 2013 2015 2014 2013 Aggregate of service and interest components of net periodic cost (benefit) $ 6 $ 4 $ 5 $ (4 ) $ (3 ) $ (4 )

Equity Incentive Plan (Tables)

Equity Incentive Plan (Tables)	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Options Outstanding	The following table is a summary of the Company’s non-vested stock options as of December 31, 2015 , and changes therein during the year then ended: Number of Stock Options Weighted Average Grant Date Fair Value Weighted Average Exercise Price Weighted Average Contractual Life (years) Outstanding- December 31, 2013 2,800,305 $ 2.30 $ 7.13 5.16 Granted 2,502,600 3.91 13.13 9.45 Forfeited (18,000 ) 3.91 13.13 — Exercised (146,833 ) 2.30 7.11 — Outstanding- December 31, 2014 5,138,072 3.08 10.04 7.44 Granted 1,090,000 4.07 14.76 9.41 Forfeited (73,040 ) 3.91 13.13 — Exercised (143,171 ) 2.33 7.22 — Outstanding- December 31, 2015 6,011,861 3.30 10.93 6.41 Exercisable- December 31, 2015 2,973,603 $ 2.57 $ 8.08 3.97
Status of the Company's Restricted Share Awards	The following is a summary of the status of the Company’s restricted shares as of December 31, 2015 , and changes therein during the year then ended: Number of Shares Awarded Weighted Average Grant Date Fair Value Non-vested at December 31, 2013 240,083 $ 7.29 Granted 1,001,200 13.13 Vested (228,209 ) 7.16 Forfeited (10,000 ) 13.13 Non-vested at December 31, 2014 1,003,074 13.11 Granted 419,000 14.76 Vested (196,492 ) 13.09 Forfeited (31,720 ) 13.13 Non-vested at December 31, 2015 1,193,862 $ 13.70

Commitments And Contingencies (

Commitments And Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitment And Contingent Liabilities Not Reflected In Consolidated Financial Statements	At December 31, 2015 and 2014 , the following commitment and contingent liabilities existed that are not reflected in the accompanying consolidated financial statements (in thousands): December 31, 2015 2014 Commitments to extend credit $ 18,400 $ 72,438 Unused lines of credit 69,414 60,598 Standby letters of credit 471 420
The Projected Minimum Annual Rental Payments And Receipts Under The Capitalized Leases And Operating Leases	The projected minimum annual rental payments and receipts under the capitalized leases and operating leases, are as follows (in thousands): Rental Payments Capitalized Leases Rental Payments Operating Leases Year ending December 31: 2016 $ 247 $ 4,294 2017 254 4,185 2018 262 3,805 2019 44 3,463 2020 — 3,452 Thereafter — 26,645 Total minimum lease payments $ 807 $ 45,844

Regulatory Requirements (Tables

Regulatory Requirements (Tables)	12 Months Ended
	Dec. 31, 2015
Regulatory Requirements [Abstract]
Bank's Regulatory Capital Amounts And Ratios Compared To Regulatory Requirements	The following is a summary of Northfield Bank’s regulatory capital amounts and ratios compared to the regulatory requirements as of December 31, 2015 and 2014 , for classification as a well-capitalized institution and minimum capital (dollars in thousands): For Well For Capital Capitalized Adequacy Under Prompt Corrective Actual Purposes Action Provisions Amount Ratio Amount Ratio Amount Ratio As of December 31, 2015: Common Equity Tier 1 Capital (to risk-weighted assets) $ 498,067 20.19 % $ 111,025 4.50 % $ 160,369 6.50 % Tier 1 Leverage 498,067 15.72 126,744 4.00 158,429 5.00 Tier I capital (to risk-weighted assets) 498,067 20.19 148,033 6.00 197,378 8.00 Total capital (to risk-weighted assets) 523,223 21.21 197,378 8.00 246,722 10.00 As of December 31, 2014: Tangible capital to tangible assets $ 494,131 16.46 % $ 45,036 1.50 % NA NA Tier I capital (core) (to adjusted total assets) 494,131 16.46 120,096 4.00 150,119 5.00 Total capital (to risk-weighted assets) 520,875 22.95 181,585 8.00 226,982 10.00 The following is a summary of the Company's regulatory capital amounts and ratios compared to the regulatory requirements as of December 31, 2015 for classification as a well-capitalized institution and minimum capital (dollars in thousands). The Company was not subject to such capital requirements at December 31, 2014. As of December 31, 2015, the Company exceeded all capital requirements to which it is subject. For Well For Capital Capitalized Adequacy Under Prompt Corrective Actual Purposes Action Provisions Amount Ratio Amount Ratio Amount Ratio As of December 31, 2015: Common Equity Tier 1 Capital (to risk-weighted assets) $ 546,564 22.15 % $ 111,025 4.50 % $ 160,369 6.50 % Tier 1 Leverage 546,564 17.25 126,764 4.00 158,455 5.00 Tier I capital (to risk-weighted assets) 546,564 22.15 148,033 6.00 197,378 8.00 Total capital (to risk-weighted assets) 571,720 23.17 197,378 8.00 246,722 10.00

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Significant Fair Value Of Assets And Liabilities Measured On Recurring And Non Recurring Basis	The following tables summarize financial assets and financial liabilities measured at fair value as of December 31, 2015 and 2014 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands): Fair Value Measurements at December 31, 2015 Using: Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Measured on a recurring basis: Assets: Investment securities: Available-for-sale: Mortgage-backed securities GSE $ 529,524 $ — $ 529,524 $ — Non-GSE 579 — 579 — Other securities Corporate bonds 11,011 — 11,011 — Equities 481 481 — — Total available-for-sale 541,595 481 541,114 — Trading securities 6,713 6,713 — — Total $ 548,308 $ 7,194 $ 541,114 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 9,091 $ — $ — $ 9,091 One-to-four family residential mortgage 2,873 — — 2,873 Multifamily 1,288 — — 1,288 Home equity and lines of credit 303 — — 303 Total impaired real estate loans 13,555 — — 13,555 Commercial and industrial loans 25 — — 25 Other real estate owned 45 — — 45 Total $ 13,625 $ — $ — $ 13,625 Fair Value Measurements at December 31, 2014 Using: Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Measured on a recurring basis: Assets: Investment securities: Available-for-sale: Mortgage-backed securities GSE $ 699,790 $ — $ 699,790 $ — Non-GSE 1,026 — 1,026 — Other securities Corporate bonds 70,013 — 70,013 — Equities 410 410 — — Total available-for-sale 771,239 410 770,829 — Trading securities 6,422 6,422 — — Total $ 777,661 $ 6,832 $ 770,829 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 17,438 $ — $ — $ 17,438 One-to-four family residential mortgage 672 — — 672 Multifamily 1,513 — — 1,513 Home equity and lines of credit 278 — — 278 Total impaired real estate loans 19,901 — — 19,901 Commercial and industrial loans 440 — — 440 Other real estate owned 752 — — 752 Total $ 21,093 $ — $ — $ 21,093
Level 3 Assets Measured At Fair Value On A Non-Recurring Basis	The following table presents qualitative information for Level 3 assets measured at fair value on a non-recurring basis at December 31, 2015 : Fair Value Valuation Methodology Unobservable Inputs Range of Inputs (in thousands) Impaired loans $ 13,580 Appraisals Discount for costs to sell 7.0% Discount for quick sale 10.0% Discounted cash flows Interest rates 4.75% - 7.5% Other real estate owned $ 45 Appraisals Discount for costs to sell 7.0% The following table presents qualitative information for Level 3 assets measured at fair value on a non-recurring basis at December 31, 2014 : Fair Value Valuation Methodology Unobservable Inputs Range of Inputs (in thousands) Impaired loans $ 20,341 Appraisals Discount for costs to sell 7.0% Discount for quick sale 10.0% - 40.0% Discounted cash flows Interest rates 4.6% - 7.5% Other real estate owned $ 752 Appraisals Discount for costs to sell 7.0%
Estimated Fair Values Of Significant Financial Instruments	The estimated fair values of the Company’s significant financial instruments at December 31, 2015 and 2014 , are presented in the following table (in thousands): December 31, 2015 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 51,853 $ 51,853 $ — $ — $ 51,853 Trading securities 6,713 6,713 — — 6,713 Securities available-for-sale 541,595 481 541,114 — 541,595 Securities held-to-maturity 10,346 — 10,369 — 10,369 FHLB of New York stock, at cost 25,803 — 25,803 — 25,803 Net loans held-for-investment 2,348,945 — — 2,375,028 2,375,028 Financial liabilities: Deposits $ 2,052,929 $ — $ 2,058,894 $ — $ 2,058,894 Repurchase agreements and other borrowings 558,129 — 557,537 — 557,537 Advance payments by borrowers 10,862 — 10,862 — 10,862 December 31, 2014 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 76,709 $ 76,709 $ — $ — $ 76,709 Trading securities 6,422 6,422 — — 6,422 Securities available-for-sale 771,239 410 770,829 — 771,239 Securities held-to-maturity 3,609 — 3,691 — 3,691 FHLB of New York stock, at cost 29,219 — 29,219 — 29,219 Net loans held-for-investment 1,942,995 — — 1,949,511 1,949,511 Financial liabilities: Deposits $ 1,620,665 $ — $ 1,622,536 $ — $ 1,622,536 Repurchase agreements and other borrowings 778,658 — 781,196 — 781,196 Advance payments by borrowers 7,792 — 7,792 — 7,792

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share Calculations And Reconciliation	The following is a summary of the Company’s earnings per share calculations and reconciliation of basic to diluted earnings per share for the periods indicated (in thousands, except share data): December 31, 2015 2014 2013 Net income available to common stockholders $ 19,531 $ 20,266 $ 19,147 Weighted average shares outstanding-basic 42,285,712 49,006,129 54,637,680 Effect of non-vested restricted stock and stock options outstanding 1,192,769 1,026,130 922,629 Weighted average shares outstanding-diluted 43,478,481 50,032,259 55,560,309 Earnings per share-basic $ 0.46 $ 0.41 $ 0.35 Earnings per share-diluted $ 0.45 $ 0.41 $ 0.34 Anti-dilutive shares 2,679,507 1,471,303 —

Parent-Only Financial Informa40

Parent-Only Financial Information (Tables) - Parent Company	12 Months Ended
	Dec. 31, 2015
Condensed Balance Sheets	Northfield Bancorp, Inc. Condensed Balance Sheets December 31, 2015 2014 (in thousands) Assets Cash in Northfield Bank $ 22,504 $ 53,681 Interest-earning deposits in other financial institutions 21 2,636 Investment in Northfield Bank 511,283 509,809 ESOP loan receivable 26,012 26,934 Other assets 516 1,048 Total assets $ 560,336 $ 594,108 Liabilities and Stockholders' Equity Total liabilities $ 557 $ 180 Total stockholders' equity 559,779 593,928 Total liabilities and stockholders' equity $ 560,336 $ 594,108
Condensed Statements Of Income And Other Comprehensive (Loss) Income	Northfield Bancorp, Inc. Condensed Statements of Comprehensive Income (Loss) Years Ended December 31, 2015 2014 2013 (in thousands) Interest on ESOP loan $ 875 $ 903 $ 904 Interest income on deposit in Northfield Bank 51 251 286 Interest income on corporate bonds — — 13 Gain on securities transactions, net (4 ) (2 ) — Undistributed earnings of Northfield Bank 19,718 20,331 19,157 Total income 20,640 21,483 20,360 Other expenses 891 956 1,188 Income tax expense 218 261 25 Total expense 1,109 1,217 1,213 Net income $ 19,531 $ 20,266 $ 19,147 Comprehensive income (loss): Net income $ 19,531 $ 20,266 $ 19,147 Other comprehensive (loss) income, net of tax (2,221 ) 3,885 (22,881 ) Comprehensive income (loss) $ 17,310 $ 24,151 $ (3,734 )
Condensed Statements Of Cash Flows	Northfield Bancorp, Inc. Condensed Statements of Cash Flows December 31, 2015 2014 2013 (in thousands) Cash flows from operating activities Net income $ 19,531 $ 20,266 $ 19,147 Adjustments to reconcile net income to net cash provided by operating activities: Decrease in accrued interest receivable — — 94 Decrease in due to Northfield Bank — — (541 ) (Increase) decrease in other assets (453 ) (969 ) 1,271 Increase (decrease) in other liabilities 377 (362 ) (556 ) Undistributed earnings of Northfield Bank (19,718 ) (20,329 ) (19,157 ) Net cash (used in) provided by operating activities (263 ) (1,394 ) 258 Cash flows from investing activities Additional investment in Northfield Bank — — (172,299 ) Dividends from Northfield Bank 25,900 66,274 — Maturities of corporate bonds — — 5,173 Loan to ESOP — — (14,224 ) Net cash provided by (used in) investing activities 25,900 66,274 (181,350 ) Cash flows from financing activities Proceeds from sale of common stock — — 344,202 Principal payments on ESOP loan receivable 922 865 950 Purchase of treasury stock (48,446 ) (138,702 ) (3,628 ) Dividends paid (12,184 ) (12,884 ) (26,859 ) Merger of Northfield Bancorp, MHC — — 124 Exercise of stock options 158 212 21 Additional tax benefit on stock awards 122 390 296 Net cash (used in) provided by financing activities (59,428 ) (150,119 ) 315,106 Net (decrease) increase in cash and cash equivalents (33,791 ) (85,239 ) 134,014 Cash and cash equivalents at beginning of year 56,316 141,555 7,541 Cash and cash equivalents at end of year $ 22,525 $ 56,316 $ 141,555

Selected Quarterly Financial 41

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
Parent Company
Selected Quarterly Financial Data (Unaudited)	The following tables are a summary of certain quarterly financial data for the years ended December 31, 2015 and 2014 : 2015 Quarter Ended March 31 June 30 September 30 December 31 (Dollars in thousands, except per share data) Selected Operating Data: Interest income $ 24,753 $ 25,037 $ 25,570 26,398 Interest expense 4,769 4,752 4,997 5,170 Net interest income 19,984 20,285 20,573 21,228 Provision (recoveries) for loan losses 200 72 200 (119 ) Net interest income after provision for loan losses 19,784 20,213 20,373 21,347 Other income 2,104 2,006 1,666 2,122 Other expenses 14,300 14,514 14,847 14,448 Income before income tax expense 7,588 7,705 7,192 9,021 Income tax expense 2,586 3,410 2,515 3,464 Net income $ 5,002 $ 4,295 $ 4,677 $ 5,557 Net income per basic common share $ 0.11 $ 0.10 $ 0.11 $ 0.13 Net income per diluted common share $ 0.11 $ 0.10 $ 0.11 $ 0.13 2014 Quarter Ended March 31 June 30 September 30 December 31 (Dollars in thousands, except per share data) Selected Operating Data: Interest income $ 22,764 $ 22,151 $ 22,707 $ 24,079 Interest expense 3,649 3,631 3,737 4,335 Net interest income 19,115 18,520 18,970 19,744 Provision (recoveries) for loan losses 417 (146 ) 317 57 Net interest income after provision for loan losses 18,698 18,666 18,653 19,687 Other income 2,172 2,387 1,840 2,061 Other expenses 12,063 12,698 13,268 14,013 Income before income tax expense 8,807 8,355 7,225 7,735 Income tax expense 3,588 2,915 2,496 2,857 Net income $ 5,219 $ 5,440 $ 4,729 $ 4,878 Net income per basic common share $ 0.10 $ 0.11 $ 0.10 $ 0.11 Net income per diluted common share $ 0.10 $ 0.11 $ 0.10 $ 0.11

Summary Of Significant Accoun42

Summary Of Significant Accounting Policies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)shares	Dec. 31, 2014USD ($)shares	Dec. 31, 2013shares	Jan. 24, 2013
Schedule Of Significant Accounting Policies [Line Items]
Conversion cost	$ 11,500
Conversion ratio				1.4029
Threshold of membership investment component, percentage	0.20%
Threshold of membership investment component	$ 1
Activity based investment component as a percentage of outstanding advances	4.50%
Goodwill	$ 16,159	$ 16,159
ESOP repayment period (years)	30 years
Effect of non-vested restricted stock and stock options outstanding | shares	1,192,769	1,026,130	922,629
Minimum
Schedule Of Significant Accounting Policies [Line Items]
Minimum amount of non-accrual loans individually evaluated for impairment	$ 500
Maximum
Schedule Of Significant Accounting Policies [Line Items]
Maximum amount of individual loans for collective evaluation for impairment	$ 500
Building
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives of significant classes of assets (years)	40 years
Furniture And Equipment | Minimum
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives of significant classes of assets (years)	5 years
Furniture And Equipment | Maximum
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives of significant classes of assets (years)	7 years
Software
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives of significant classes of assets (years)	3 years

Securities Available-For-Sale -

Securities Available-For-Sale - Narrative (Details)	12 Months Ended
	Dec. 31, 2015USD ($)security	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)security
Schedule of Available-for-sale Securities [Line Items]
Carrying value of securities available-for-sale | $	$ 35,900,000	$ 13,800,000
Proceeds from sale of securities available-for-sale | $	51,148,000	11,975,000	$ 259,551,000
Gross realized gains on sales of securities available-for-sale | $	60,000	382,000	3,100,000
Gross realized losses on sales of securities available-for-sale | $	3,000	0	128,000
Impairment charges against earnings | $	$ 0	$ 0	$ 434,000
Continuous Unrealized Loss Position Less Than 12 Months | REMIC
Schedule of Available-for-sale Securities [Line Items]
Number of securities	3
Equity investments-mutual funds
Schedule of Available-for-sale Securities [Line Items]
Number of securities			1
Non-GSE | Continuous Unrealized Loss Position 12 Months Or Longer | REMIC
Schedule of Available-for-sale Securities [Line Items]
Number of securities	2
GSE | Continuous Unrealized Loss Position 12 Months Or Longer
Schedule of Available-for-sale Securities [Line Items]
Number of securities	10
GSE | Continuous Unrealized Loss Position 12 Months Or Longer | REMIC
Schedule of Available-for-sale Securities [Line Items]
Number of securities	11
GSE | Continuous Unrealized Loss Position Less Than 12 Months | Pass-through certificates
Schedule of Available-for-sale Securities [Line Items]
Number of securities	14

Securities Available-For-Sale44

Securities Available-For-Sale - Comparative Summary Of Mortgage-Backed Securities And Other Securities Available-For-Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 546,024	$ 771,935
Gross unrealized gains	5,329	9,663
Gross unrealized losses	9,758	10,359
Estimated fair value	541,595	771,239
Pass-through certificates | GSE
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	228,557	292,162
Gross unrealized gains	4,673	8,309
Gross unrealized losses	1,530	1,131
Estimated fair value	231,700	299,340
REMICs
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	534,541	701,550
Gross unrealized gains	5,320	9,623
Gross unrealized losses	9,758	10,357
Estimated fair value	530,103	700,816
REMICs | GSE
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	305,387	408,328
Gross unrealized gains	647	1,314
Gross unrealized losses	8,210	9,192
Estimated fair value	297,824	400,450
REMICs | Non-GSE
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	597	1,060
Gross unrealized gains	0	0
Gross unrealized losses	18	34
Estimated fair value	579	1,026
Other securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	11,483	70,385
Gross unrealized gains	9	40
Gross unrealized losses	0	2
Estimated fair value	11,492	70,423
Other securities | Equity investments-mutual funds
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	481	410
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	481	410
Other securities | Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	11,002	69,975
Gross unrealized gains	9	40
Gross unrealized losses	0	2
Estimated fair value	$ 11,011	$ 70,013

Securities Available-For-Sale45

Securities Available-For-Sale - Summary Of Expected Maturity Distribution Of Debt Securities Available-For-Sale, Other Than Mortgage-Backed Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Amortized cost	$ 546,024	$ 771,935
Estimated fair value	541,595	$ 771,239
Other Than Mortgage Backed Securities
Amortized cost, Due in one year or less	11,002
Amortized cost, Due after one year through five years	0
Amortized cost	11,002
Estimated fair value, Due in one year or less	11,011
Estimated fair value, Amortized cost, Due after one year through five years	0
Estimated fair value	$ 11,011

Securities Available-For-Sale46

Securities Available-For-Sale - Gross Unrealized Losses On Mortgage-Backed Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, less than 12 months	$ 453	$ 33
Estimated Fair value, less than 12 months	46,361	13,356
Unrealized losses, 12 months or more	9,305	10,326
Estimated Fair value, 12 months or more	217,365	292,448
Unrealized losses, total	9,758	10,359
Estimated fair value, total	263,726	305,804
Pass-through certificates | GSE
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, less than 12 months	115	1
Estimated Fair value, less than 12 months	14,424	181
Unrealized losses, 12 months or more	1,415	1,130
Estimated Fair value, 12 months or more	52,120	61,526
Unrealized losses, total	1,530	1,131
Estimated fair value, total	66,544	61,707
REMICs | GSE
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, less than 12 months	338	30
Estimated Fair value, less than 12 months	31,937	3,179
Unrealized losses, 12 months or more	7,872	9,162
Estimated Fair value, 12 months or more	164,666	229,896
Unrealized losses, total	8,210	9,192
Estimated fair value, total	$ 196,603	233,075
REMICs | Non-GSE
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, less than 12 months		0
Estimated Fair value, less than 12 months		0
Unrealized losses, 12 months or more	$ 18	34
Estimated Fair value, 12 months or more	579	1,026
Unrealized losses, total	18	34
Estimated fair value, total	$ 579	1,026
Other securities | Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, less than 12 months		2
Estimated Fair value, less than 12 months		9,996
Unrealized losses, total		2
Estimated fair value, total		$ 9,996

Securities Held-To-Maturity (De

Securities Held-To-Maturity (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)security	Dec. 31, 2014USD ($)security
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 10,346	$ 3,609
Gross Unrealized Gains	53	82
Gross Unrealized Losses	30	0
Estimated fair value of securities held to maturity	$ 10,369	$ 3,691
Number of held-to-maturity securities in an unrealized loss position | security	0	0
Mortgage-Backed Securities, Pass-Through Certificates
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 10,346	$ 3,609
Gross Unrealized Gains	53	82
Gross Unrealized Losses	30	0
Estimated fair value of securities held to maturity	$ 10,369	$ 3,691

Loans - Narrative (Details)

Loans - Narrative (Details)	12 Months Ended
	Dec. 31, 2015USD ($)contractborrower	Dec. 31, 2014USD ($)contract
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans held for sale	$ 0	$ 0
Purchased credit-impaired (PCI) loans held-for-investment, Federal Deposit Insurance Corporation assisted transaction		44,800,000
Purchased credit-impaired (PCI) loans held-for-investment	33,115,000	44,816,000
Principal balance of loans on non accrual status	2,100,000	3,800,000
Investment in non accrual loans	8,800,000	13,900,000
Impairment of loans	6,700,000	10,100,000
Loans held-for-sale non accrual amount	0	0
Loans past 90 days and still accruing	15,000	708,000
Loans with carrying balances not written down	14,500,000	13,100,000
Average original impaired loans	31,978,000	35,854,000
Interest income on impaired loans	$ 1,473,000	$ 1,190,000
Number of Relationships | contract	13	2
Pre-Modification Outstanding Recorded Investment	$ 10,909,000	$ 556,000
Troubled debt restructurings	26,600,000	$ 33,800,000
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal balance of loans on non accrual status	$ 500,000
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Purchase Credit Impaired Loans	28.00%	33.00%
Loan to value ratio	35.00%
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Purchase Credit Impaired Loans	52.00%	53.00%
Average original impaired loans	$ 258,000	$ 1,154,000
Interest income on impaired loans	2,000	23,000
Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average original impaired loans	26,665,000	30,674,000
Interest income on impaired loans	$ 1,143,000	1,022,000
Number of Relationships | contract	1
Pre-Modification Outstanding Recorded Investment	$ 6,300,000
Pre-modification number of loans | contract	5
Number of borrowers | borrower	1
Post-modification number of loans | contract	1
Proceeds from Loans	$ 500,000
One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan to value ratio	60.00%
Average original impaired loans	$ 2,542,000	1,048,000
Interest income on impaired loans	$ 220,000	$ 39,000

Loans - Net Loans Held-For-Inve

Loans - Net Loans Held-For-Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investments In Loans [Line Items]
Originated loans held-for-investment, net	$ 1,931,585	$ 1,632,494
PCI Loans	33,115	44,816
Loans acquired	409,015	265,685
Loans held-for-investment, net	2,373,715	1,942,995
Allowance for loan losses	(24,770)	(26,292)	$ (26,037)	$ (26,424)
Net loans held-for-investment	2,348,945	1,916,703
Real Estate Loans
Investments In Loans [Line Items]
Loans Receivable	1,898,931	1,612,827
Commercial and industrial loans	25,554	12,945
Other loans	2,256	2,157
Total commercial and industrial and other loans	27,810	15,102
Deferred loan cost, net	4,844	4,565
Originated loans held-for-investment, net	1,931,585	1,632,494
PCI Loans	33,115	44,816
Real Estate Loans | Multifamily
Investments In Loans [Line Items]
Loans Receivable	1,318,461	1,072,193
Loans held-for-investment, net	1,320,724	1,074,539
Allowance for loan losses	(12,387)	(12,219)	(9,374)
Real Estate Loans | Commercial mortgage
Investments In Loans [Line Items]
Loans Receivable	402,073	390,288
Loans held-for-investment, net	402,714	390,885
Allowance for loan losses	(7,106)	(9,309)	(12,619)
Real Estate Loans | One-to-four family residential mortgage
Investments In Loans [Line Items]
Loans Receivable	98,332	74,401
Loans held-for-investment, net	99,010	74,990
Allowance for loan losses	(787)	(951)	(875)
Real Estate Loans | Home equity and lines of credit
Investments In Loans [Line Items]
Loans Receivable	61,413	54,533
Loans held-for-investment, net	62,594	55,486
Allowance for loan losses	(795)	(901)	(860)
Real Estate Loans | Construction and land
Investments In Loans [Line Items]
Loans Receivable	18,652	21,412
Loans held-for-investment, net	18,677	21,445
Allowance for loan losses	(261)	(266)	$ (205)
Acquired Loans
Investments In Loans [Line Items]
Loans acquired	409,015	265,685
Loans held-for-investment, net	2,373,715	1,942,995
Allowance for loan losses	(24,770)	(26,292)
Acquired Loans | Multifamily
Investments In Loans [Line Items]
Loans acquired	64,779	18,844
Acquired Loans | Commercial mortgage
Investments In Loans [Line Items]
Loans acquired	11,160	11,999
Acquired Loans | One-to-four family residential mortgage
Investments In Loans [Line Items]
Loans acquired	330,672	234,478
Acquired Loans | Home equity and lines of credit
Investments In Loans [Line Items]
Loans acquired	2,404	0
Acquired Loans | Construction and land
Investments In Loans [Line Items]
Loans acquired	$ 0	$ 364

Loans - Summary Of Accretable Y

Loans - Summary Of Accretable Yield (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at the beginning of year		$ 27,943	$ 32,464
Accretable yield at purchase date		0	0
Accretion into interest income		(4,525)	(4,895)
Net reclassification (to)/from non-accretable difference	[1]	(565)	374
Balance at end of year		$ 22,853	$ 27,943
[1]	(1) Due to re-casting of cash flows for loan pools acquired in the 2011 FDIC-assisted transaction.

Loans - Activity In The Allowan

Loans - Activity In The Allowance For Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 26,292	$ 26,037	$ 26,424
Provision for loan losses	353	645	1,927
Recoveries	140	402	860
Charge-offs	(2,015)	(792)	(3,174)
Ending Balance	$ 24,770	$ 26,292	$ 26,037

Loans - Allowance For Loan Loss

Loans - Allowance For Loan Losses And The Loans Receivable By Portfolio Segment And Based On Impairment Method (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for loan losses:
Beginning Balance	$ 26,292	$ 26,037	$ 26,424
Charge-offs	(2,015)	(792)	(3,174)
Recoveries	140	402	860
Provisions (credit)	353	645	1,927
Ending Balance	24,770	26,292	26,037
Ending balance: individually evaluated for impairment	889	2,817
Ending balance: collectively evaluated for impairment	23,881	23,475
Loans, net:
Ending Balance	2,373,715	1,942,995
Ending balance: individually evaluated for impairment	28,987	34,274
Ending balance: collectively evaluated for impairment	2,344,728	1,908,721
Commercial and Industrial
Allowance for loan losses:
Beginning Balance	841	425
Charge-offs	(71)	(135)
Recoveries	34	8
Provisions (credit)	484	543
Ending Balance	1,288	841	425
Ending balance: individually evaluated for impairment	4	109
Ending balance: collectively evaluated for impairment	1,284	732
Loans, net:
Ending Balance	25,610	12,992
Ending balance: individually evaluated for impairment	116	806
Ending balance: collectively evaluated for impairment	25,494	12,186
Other
Allowance for loan losses:
Beginning Balance	134	67
Charge-offs	(1)	0
Recoveries	17	41
Provisions (credit)	5	26
Ending Balance	155	134	67
Ending balance: collectively evaluated for impairment	155	134
Loans, net:
Ending Balance	2,256	2,157
Ending balance: collectively evaluated for impairment	2,256	2,157
Unallocated
Allowance for loan losses:
Beginning Balance	1,209	1,024
Provisions (credit)	(116)	185
Ending Balance	1,093	1,209	1,024
Ending balance: collectively evaluated for impairment	1,093	1,209
Originated Loans Total
Allowance for loan losses:
Beginning Balance	25,830	25,449
Charge-offs	(2,015)	(792)
Recoveries	140	402
Provisions (credit)	(83)	771
Ending Balance	23,872	25,830	25,449
Ending balance: individually evaluated for impairment	774	2,755
Ending balance: collectively evaluated for impairment	23,098	23,075
Loans, net:
Ending Balance	1,931,585	1,632,494
Ending balance: individually evaluated for impairment	25,737	33,419
Ending balance: collectively evaluated for impairment	1,905,848	1,599,075
PCI
Allowance for loan losses:
Beginning Balance	400	588
Provisions (credit)	383	(188)
Ending Balance	783	400	588
Ending balance: collectively evaluated for impairment	783	400
Loans, net:
Ending Balance	33,115	44,816
Ending balance: collectively evaluated for impairment	33,115	44,816
Acquired Loans
Allowance for loan losses:
Beginning Balance	62	0
Provisions (credit)	53	62
Ending Balance	115	62	0
Ending balance: individually evaluated for impairment	115	62
Ending balance: collectively evaluated for impairment	0	0
Loans, net:
Ending Balance	409,015	265,685
Ending balance: individually evaluated for impairment	3,250	855
Ending balance: collectively evaluated for impairment	405,765	264,830
Real Estate Loans | Commercial mortgage
Allowance for loan losses:
Beginning Balance	9,309	12,619
Charge-offs	(1,431)	(103)
Recoveries	2	72
Provisions (credit)	(774)	(3,279)
Ending Balance	7,106	9,309	12,619
Ending balance: individually evaluated for impairment	394	2,361
Ending balance: collectively evaluated for impairment	6,712	6,948
Loans, net:
Ending Balance	402,714	390,885
Ending balance: individually evaluated for impairment	20,465	29,224
Ending balance: collectively evaluated for impairment	382,249	361,661
Real Estate Loans | One-to-four family residential mortgage
Allowance for loan losses:
Beginning Balance	951	875
Charge-offs	(277)	(58)
Recoveries	20	0
Provisions (credit)	93	134
Ending Balance	787	951	875
Ending balance: individually evaluated for impairment	167	57
Ending balance: collectively evaluated for impairment	620	894
Loans, net:
Ending Balance	99,010	74,990
Ending balance: individually evaluated for impairment	2,344	1,072
Ending balance: collectively evaluated for impairment	96,666	73,918
Real Estate Loans | Construction and land
Allowance for loan losses:
Beginning Balance	266	205
Recoveries	0	246
Provisions (credit)	(5)	(185)
Ending Balance	261	266	205
Ending balance: collectively evaluated for impairment	261	266
Loans, net:
Ending Balance	18,677	21,445
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	18,677	21,445
Real Estate Loans | Multifamily
Allowance for loan losses:
Beginning Balance	12,219	9,374
Charge-offs	(120)	(7)
Recoveries	25	35
Provisions (credit)	263	2,817
Ending Balance	12,387	12,219	9,374
Ending balance: individually evaluated for impairment	158	215
Ending balance: collectively evaluated for impairment	12,229	12,004
Loans, net:
Ending Balance	1,320,724	1,074,539
Ending balance: individually evaluated for impairment	2,458	1,990
Ending balance: collectively evaluated for impairment	1,318,266	1,072,549
Real Estate Loans | Home equity and lines of credit
Allowance for loan losses:
Beginning Balance	901	860
Charge-offs	(115)	(489)
Recoveries	42
Provisions (credit)	(33)	530
Ending Balance	795	901	$ 860
Ending balance: individually evaluated for impairment	51	13
Ending balance: collectively evaluated for impairment	744	888
Loans, net:
Ending Balance	62,594	55,486
Ending balance: individually evaluated for impairment	354	327
Ending balance: collectively evaluated for impairment	$ 62,240	$ 55,159

Loans - Investment Of Originate

Loans - Investment Of Originated Loans Held-For-Investment, Net Of Deferred Fees And Costs, By Loan Type And Credit Quality Indicator (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	$ 1,931,585	$ 1,632,494
Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	1,888,301	1,561,842
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	8,718	19,008
Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	34,566	51,644
Multifamily | Real Estate Loans | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	125,504	65,776
Multifamily | Real Estate Loans | Greater Than or Equal to 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	1,195,220	1,008,763
Multifamily | Real Estate Loans | Pass | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	124,678	64,692
Multifamily | Real Estate Loans | Pass | Greater Than or Equal to 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	1,188,916	999,708
Multifamily | Real Estate Loans | Special Mention | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	51	283
Multifamily | Real Estate Loans | Special Mention | Greater Than or Equal to 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	3,832	4,342
Multifamily | Real Estate Loans | Substandard | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	775	801
Multifamily | Real Estate Loans | Substandard | Greater Than or Equal to 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	2,472	4,713
Commercial mortgage | Real Estate Loans | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	54,460	49,970
Commercial mortgage | Real Estate Loans | Greater Than or Equal to 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	348,254	340,915
Commercial mortgage | Real Estate Loans | Pass | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	52,253	47,534
Commercial mortgage | Real Estate Loans | Pass | Greater Than or Equal to 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	319,733	289,794
Commercial mortgage | Real Estate Loans | Special Mention | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	974	2,436
Commercial mortgage | Real Estate Loans | Special Mention | Greater Than or Equal to 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	2,966	9,792
Commercial mortgage | Real Estate Loans | Substandard | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	1,233	0
Commercial mortgage | Real Estate Loans | Substandard | Greater Than or Equal to 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	25,555	41,329
One-to-four family residential mortgage | Real Estate Loans | Less Than 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	51,045	33,075
One-to-four family residential mortgage | Real Estate Loans | Greater than or Equal to 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	47,965	41,915
One-to-four family residential mortgage | Real Estate Loans | Pass | Less Than 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	48,429	29,629
One-to-four family residential mortgage | Real Estate Loans | Pass | Greater than or Equal to 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	46,578	40,527
One-to-four family residential mortgage | Real Estate Loans | Special Mention | Less Than 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	504	1,143
One-to-four family residential mortgage | Real Estate Loans | Special Mention | Greater than or Equal to 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	0	0
One-to-four family residential mortgage | Real Estate Loans | Substandard | Less Than 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	2,112	2,303
One-to-four family residential mortgage | Real Estate Loans | Substandard | Greater than or Equal to 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	1,387	1,388
Construction and land | Real Estate Loans
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	18,677	21,445
Construction and land | Real Estate Loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	18,677	21,445
Construction and land | Real Estate Loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	0	0
Construction and land | Real Estate Loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	0	0
Home equity and lines of credit | Real Estate Loans
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	62,594	55,486
Home equity and lines of credit | Real Estate Loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	61,935	54,935
Home equity and lines of credit | Real Estate Loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	75	360
Home equity and lines of credit | Real Estate Loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	584	191
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	25,610	12,992
Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	24,846	11,421
Commercial and Industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	316	652
Commercial and Industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	448	919
Other loans
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	2,256	2,157
Other loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	2,256	2,157
Other loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	0	0
Other loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	$ 0	$ 0

Loans - Estimated Expected Futu

Loans - Estimated Expected Future Cash Flows Of Each PCI Loan Pool (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
90 Days or More Past Due and Accruing	$ 15	$ 708
Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	8,807	13,875
90 Days or More Past Due and Accruing	15	708
Total Non-Performing Loans	8,822	14,583
Non-Performing Loans | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	8,378	13,562
90 Days or More Past Due and Accruing	15	286
Total Non-Performing Loans	8,393	13,848
Non-Performing Loans | Loans Held For Investment | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	5,232	11,164
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	5,232	11,164
Non-Performing Loans | Loans Held For Investment | Commercial mortgage | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	5,232
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	5,232
Non-Performing Loans | Loans Held For Investment | Commercial mortgage | Greater Than or Equal to 35% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	5,232	11,164
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	5,232	11,164
Non-Performing Loans | Loans Held For Investment | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	2,145	1,892
90 Days or More Past Due and Accruing	0	286
Total Non-Performing Loans	2,145	2,178
Non-Performing Loans | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	1,109	864
90 Days or More Past Due and Accruing	0	286
Total Non-Performing Loans	1,109	1,150
Non-Performing Loans | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	1,109	864
90 Days or More Past Due and Accruing	0	286
Total Non-Performing Loans	1,109	1,150
Non-Performing Loans | Loans Held For Investment | One-to-four family residential mortgage | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	1,036	1,028
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	1,036	1,028
Non-Performing Loans | Loans Held For Investment | One-to-four family residential mortgage | Greater than or Equal to 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	1,036	1,028
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	1,036	1,028
Non-Performing Loans | Loans Held For Investment | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	113
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	113
Non-Performing Loans | Loans Held For Investment | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	113
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	113
Non-Performing Loans | Loans Held For Investment | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	559
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	559
Non-Performing Loans | Loans Held For Investment | Multifamily | Greater Than or Equal to 35% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	559
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	559
Non-Performing Loans | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	329	98
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	329	98
Non-Performing Loans | Loans Held For Investment | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	329	98
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	329	98
Non-Performing Loans | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	408
90 Days or More Past Due and Accruing	15	0
Total Non-Performing Loans	15	408
Non-Performing Loans | Loans Held For Investment | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
90 Days or More Past Due and Accruing	15
Total Non-Performing Loans	15
Non-Performing Loans | Loans Held For Investment | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		408
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		408
Non-Performing Loans | Loans Held For Investment | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		0
Non-Performing Loans | Loans Held For Investment | Other loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		0
Non-Performing Loans | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	429	313
90 Days or More Past Due and Accruing	0	422
Total Non-Performing Loans	429	735
Non-Performing Loans | Acquired Loans | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	429	313
90 Days or More Past Due and Accruing	0	422
Total Non-Performing Loans	429	735
Non-Performing Loans | Acquired Loans | One-to-four family residential mortgage | Less Than 60% LTV | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
90 Days or More Past Due and Accruing		422
Total Non-Performing Loans		422
Non-Performing Loans | Acquired Loans | One-to-four family residential mortgage | Less Than 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	429	313
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	429	313
Non-Performing Loans | 0-29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	2,038	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	1,609	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	344	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Commercial mortgage | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	344
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Commercial mortgage | Greater Than or Equal to 35% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	344	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	1,265	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	364	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	364	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	901	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Greater than or Equal to 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	901	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Multifamily | Greater Than or Equal to 35% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Other loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 0-29 Days Past Due | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	429	0
Non-Performing Loans | 0-29 Days Past Due | Acquired Loans | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	429	0
Non-Performing Loans | 0-29 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Less Than 60% LTV | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 0-29 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Less Than 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	429	0
Non-Performing Loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	687	683
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	687	683
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	372	395
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Commercial mortgage | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	372
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Commercial mortgage | Greater Than or Equal to 35% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	372	395
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	315	190
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	180	190
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	180	190
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	135	0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Greater than or Equal to 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	135	0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Multifamily | Greater Than or Equal to 35% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	98
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	98
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Other loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 30-89 Days Past Due | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 30-89 Days Past Due | Acquired Loans | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 30-89 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Less Than 60% LTV | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 30-89 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Less Than 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	6,082	13,192
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	6,082	12,879
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	4,516	10,769
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Commercial mortgage | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	4,516
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Commercial mortgage | Greater Than or Equal to 35% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	4,516	10,769
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	565	1,702
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	565	674
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	565	674
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | One-to-four family residential mortgage | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	1,028
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | One-to-four family residential mortgage | Greater than or Equal to 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	1,028
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	113
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	113
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	559
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Multifamily | Greater Than or Equal to 35% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	559
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	329	0
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	329	0
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	408
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		408
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Other loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 90 Days or More Past Due | Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	313
Non-Performing Loans | 90 Days or More Past Due | Acquired Loans | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	313
Non-Performing Loans | 90 Days or More Past Due | Acquired Loans | One-to-four family residential mortgage | Less Than 60% LTV | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 90 Days or More Past Due | Acquired Loans | One-to-four family residential mortgage | Less Than 60% LTV | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	$ 0	$ 313

Loans - Detail And Delinquency

Loans - Detail And Delinquency Status Of Originated Loans Held-For-Investment, Net Of Deferred Fees And Costs, By Performing And Non-Performing Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	$ 1,931,585	$ 1,632,494
Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,807	13,875
Non-Performing Loans	8,822	14,583
Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,931,585	1,632,494
Loans Held For Investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,923,192	1,618,646
Loans Held For Investment | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	8,393	13,848
Loans Held For Investment | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	402,714	390,885
Loans Held For Investment | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	54,460	49,970
Loans Held For Investment | Commercial mortgage | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	348,254	340,915
Loans Held For Investment | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	52,253	47,534
Loans Held For Investment | Commercial mortgage | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	319,733	289,793
Loans Held For Investment | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	974	2,436
Loans Held For Investment | Commercial mortgage | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,966	9,792
Loans Held For Investment | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,233
Loans Held For Investment | Commercial mortgage | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	25,555	41,330
Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	397,482	379,721
Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	54,460	49,970
Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	343,022	329,751
Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	52,253	47,534
Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	319,733	289,793
Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	974	2,436
Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,966	9,792
Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,233
Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	20,323	30,166
Loans Held For Investment | Commercial mortgage | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	5,232	11,164
Loans Held For Investment | Commercial mortgage | Non-Performing Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Commercial mortgage | Non-Performing Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	5,232	11,164
Loans Held For Investment | Commercial mortgage | Non-Performing Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Commercial mortgage | Non-Performing Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Commercial mortgage | Non-Performing Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Commercial mortgage | Non-Performing Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Commercial mortgage | Non-Performing Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0
Loans Held For Investment | Commercial mortgage | Non-Performing Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	5,232	11,164
Loans Held For Investment | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	99,010	74,990
Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	51,045	33,075
Loans Held For Investment | One-to-four family residential mortgage | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	47,965	41,915
Loans Held For Investment | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	48,429	29,629
Loans Held For Investment | One-to-four family residential mortgage | Pass | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	46,578	40,527
Loans Held For Investment | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	504	1,143
Loans Held For Investment | One-to-four family residential mortgage | Special Mention | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		0
Loans Held For Investment | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,112	2,303
Loans Held For Investment | One-to-four family residential mortgage | Substandard | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,387	1,388
Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	96,865	72,812
Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	49,936	31,925
Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	46,929	40,887
Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	48,429	29,629
Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	46,578	40,527
Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	504	1,143
Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Special Mention | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,003	1,153
Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	351	360
Loans Held For Investment | One-to-four family residential mortgage | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	2,145	2,178
Loans Held For Investment | One-to-four family residential mortgage | Non-Performing Loans | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	1,109	1,150
Loans Held For Investment | One-to-four family residential mortgage | Non-Performing Loans | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	1,036	1,028
Loans Held For Investment | One-to-four family residential mortgage | Non-Performing Loans | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | One-to-four family residential mortgage | Non-Performing Loans | Pass | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | One-to-four family residential mortgage | Non-Performing Loans | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | One-to-four family residential mortgage | Non-Performing Loans | Special Mention | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Loans Held For Investment | One-to-four family residential mortgage | Non-Performing Loans | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	1,109	1,150
Loans Held For Investment | One-to-four family residential mortgage | Non-Performing Loans | Substandard | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	1,036	1,028
Loans Held For Investment | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	18,677	21,445
Loans Held For Investment | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	18,677	21,445
Loans Held For Investment | Construction and land | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		0
Loans Held For Investment | Construction and land | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		0
Loans Held For Investment | Construction and land | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	18,564	21,445
Loans Held For Investment | Construction and land | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	18,564	21,445
Loans Held For Investment | Construction and land | Performing (Accruing) Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
Loans Held For Investment | Construction and land | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
Loans Held For Investment | Construction and land | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	113	0
Loans Held For Investment | Construction and land | Non-Performing Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	113	0
Loans Held For Investment | Construction and land | Non-Performing Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Loans Held For Investment | Construction and land | Non-Performing Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Loans Held For Investment | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,320,724	1,074,539
Loans Held For Investment | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	125,504	65,776
Loans Held For Investment | Multifamily | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,195,220	1,008,763
Loans Held For Investment | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	124,678	64,692
Loans Held For Investment | Multifamily | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,188,916	999,708
Loans Held For Investment | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	51	283
Loans Held For Investment | Multifamily | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	3,832	4,342
Loans Held For Investment | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	775	801
Loans Held For Investment | Multifamily | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,472	4,713
Loans Held For Investment | Multifamily | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,320,165	1,074,539
Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	125,504	65,776
Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,194,661	1,008,763
Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	124,678	64,692
Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,188,916	999,708
Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	51	283
Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,832	4,342
Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	775	801
Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,913	4,713
Loans Held For Investment | Multifamily | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	559	0
Loans Held For Investment | Multifamily | Non-Performing Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Multifamily | Non-Performing Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	559	0
Loans Held For Investment | Multifamily | Non-Performing Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Multifamily | Non-Performing Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Multifamily | Non-Performing Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Multifamily | Non-Performing Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Multifamily | Non-Performing Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Multifamily | Non-Performing Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	559	0
Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	62,594	55,486
Loans Held For Investment | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	61,935	54,935
Loans Held For Investment | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	75	360
Loans Held For Investment | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	584	191
Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	62,265	55,388
Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	61,935	54,935
Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	75	360
Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	255	93
Loans Held For Investment | Home equity and lines of credit | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	329	98
Loans Held For Investment | Home equity and lines of credit | Non-Performing Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Home equity and lines of credit | Non-Performing Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Home equity and lines of credit | Non-Performing Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	329	98
Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	25,610	12,992
Loans Held For Investment | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	24,846	11,421
Loans Held For Investment | Commercial and Industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	316	652
Loans Held For Investment | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	448	919
Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	25,595	12,584
Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	24,831	11,421
Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	316	652
Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	448	511
Loans Held For Investment | Commercial and Industrial | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	15	408
Loans Held For Investment | Commercial and Industrial | Non-Performing Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	15	0
Loans Held For Investment | Commercial and Industrial | Non-Performing Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Commercial and Industrial | Non-Performing Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	408
Loans Held For Investment | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,256	2,157
Loans Held For Investment | Other loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,256	2,157
Loans Held For Investment | Other loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,256	2,157
Loans Held For Investment | Other loans | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,256	2,157
Loans Held For Investment | Other loans | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Other loans | Non-Performing Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	409,015	265,685
Acquired Loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	408,586	264,950
Acquired Loans | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	429	735
Acquired Loans | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	11,160	11,999
Acquired Loans | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,893	3,185
Acquired Loans | Commercial mortgage | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	8,267	8,814
Acquired Loans | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,164	2,477
Acquired Loans | Commercial mortgage | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	5,536	5,817
Acquired Loans | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		708
Acquired Loans | Commercial mortgage | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	883
Acquired Loans | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	729
Acquired Loans | Commercial mortgage | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,848	2,997
Acquired Loans | Commercial mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	11,160	11,999
Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,893	3,185
Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,267	8,814
Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,164	2,477
Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	5,536	5,817
Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		708
Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	883
Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	729
Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,848	2,997
Acquired Loans | Commercial mortgage | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Commercial mortgage | Non-Performing Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Commercial mortgage | Non-Performing Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Commercial mortgage | Non-Performing Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Commercial mortgage | Non-Performing Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Commercial mortgage | Non-Performing Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Acquired Loans | Commercial mortgage | Non-Performing Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0
Acquired Loans | Commercial mortgage | Non-Performing Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0
Acquired Loans | Commercial mortgage | Non-Performing Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	330,672	234,479
Acquired Loans | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	315,629	228,023
Acquired Loans | One-to-four family residential mortgage | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	15,043	6,456
Acquired Loans | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	313,737	226,689
Acquired Loans | One-to-four family residential mortgage | Pass | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	14,759	6,162
Acquired Loans | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	549	597
Acquired Loans | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,343	737
Acquired Loans | One-to-four family residential mortgage | Substandard | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	284	294
Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	330,243	233,744
Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	315,200	227,288
Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	15,043	6,456
Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	313,737	226,267
Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	14,759	6,162
Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	549	597
Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	914	424
Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	284	294
Acquired Loans | One-to-four family residential mortgage | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	429	735
Acquired Loans | One-to-four family residential mortgage | Non-Performing Loans | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	429	735
Acquired Loans | One-to-four family residential mortgage | Non-Performing Loans | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | One-to-four family residential mortgage | Non-Performing Loans | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	422
Acquired Loans | One-to-four family residential mortgage | Non-Performing Loans | Pass | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | One-to-four family residential mortgage | Non-Performing Loans | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | One-to-four family residential mortgage | Non-Performing Loans | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	429	313
Acquired Loans | One-to-four family residential mortgage | Non-Performing Loans | Substandard | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		363
Acquired Loans | Construction and land | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		363
Acquired Loans | Construction and land | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		363
Acquired Loans | Construction and land | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		363
Acquired Loans | Construction and land | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Acquired Loans | Construction and land | Non-Performing Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Acquired Loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	64,779	18,844
Acquired Loans | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	4,833	5,021
Acquired Loans | Multifamily | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	59,946	13,823
Acquired Loans | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	4,695	4,857
Acquired Loans | Multifamily | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	59,632	13,457
Acquired Loans | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	138
Acquired Loans | Multifamily | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	314	366
Acquired Loans | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		164
Acquired Loans | Multifamily | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	64,779	18,844
Acquired Loans | Multifamily | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,833	5,021
Acquired Loans | Multifamily | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	59,946	13,823
Acquired Loans | Multifamily | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,695	4,857
Acquired Loans | Multifamily | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	59,632	13,457
Acquired Loans | Multifamily | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	138
Acquired Loans | Multifamily | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	314	366
Acquired Loans | Multifamily | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		164
Acquired Loans | Multifamily | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Multifamily | Non-Performing Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Multifamily | Non-Performing Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Multifamily | Non-Performing Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Multifamily | Non-Performing Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Multifamily | Non-Performing Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0
Acquired Loans | Multifamily | Non-Performing Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Acquired Loans | Multifamily | Non-Performing Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Acquired Loans | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,404
Acquired Loans | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,404
Acquired Loans | Home equity and lines of credit | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,404
Acquired Loans | Home equity and lines of credit | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,404
Acquired Loans | Home equity and lines of credit | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0
Acquired Loans | Home equity and lines of credit | Non-Performing Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0
Total Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,340,600	1,898,179
Total Loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,331,778	1,883,596
Total Loans | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	8,822	14,583
0-29 Days Past Due | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,038	0
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,902,790	1,607,816
0-29 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	384,254	373,750
0-29 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	53,181	49,970
0-29 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	331,073	323,780
0-29 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	50,974	47,534
0-29 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	319,411	288,915
0-29 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	974	2,436
0-29 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,966	9,792
0-29 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,233
0-29 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,696	25,073
0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	93,145	69,360
0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	46,567	31,298
0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	46,578	38,062
0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	45,737	29,288
0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	46,578	38,062
0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	134	1,143
0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Special Mention | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	696	867
0-29 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
0-29 Days Past Due | Loans Held For Investment | Construction and land | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	18,564	21,445
0-29 Days Past Due | Loans Held For Investment | Construction and land | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	18,564	21,445
0-29 Days Past Due | Loans Held For Investment | Construction and land | Performing (Accruing) Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
0-29 Days Past Due | Loans Held For Investment | Construction and land | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
0-29 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,317,200	1,073,449
0-29 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	125,453	65,776
0-29 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,191,747	1,007,673
0-29 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	124,678	64,692
0-29 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,187,147	999,469
0-29 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	283
0-29 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,687	3,822
0-29 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	775	801
0-29 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,913	4,382
0-29 Days Past Due | Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	61,891	55,253
0-29 Days Past Due | Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	61,561	54,800
0-29 Days Past Due | Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	75	360
0-29 Days Past Due | Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	255	93
0-29 Days Past Due | Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	25,491	12,462
0-29 Days Past Due | Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	24,780	11,331
0-29 Days Past Due | Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	316	652
0-29 Days Past Due | Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	395	479
0-29 Days Past Due | Loans Held For Investment | Other loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,245	2,097
0-29 Days Past Due | Loans Held For Investment | Other loans | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,245	2,097
0-29 Days Past Due | Acquired Loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	407,368	263,528
0-29 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	10,431	11,478
0-29 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,164	2,664
0-29 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,267	8,814
0-29 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,164	2,477
0-29 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	5,536	5,817
0-29 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		187
0-29 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	883
0-29 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
0-29 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,848	2,997
0-29 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	329,754	232,843
0-29 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	314,711	226,762
0-29 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	15,043	6,081
0-29 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	313,425	225,741
0-29 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	14,759	5,787
0-29 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	549	597
0-29 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	737	424
0-29 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	284	294
0-29 Days Past Due | Acquired Loans | Construction and land | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		363
0-29 Days Past Due | Acquired Loans | Construction and land | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		363
0-29 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	64,779	18,844
0-29 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,833	5,021
0-29 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	59,946	13,823
0-29 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,695	4,857
0-29 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	59,632	13,457
0-29 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	138
0-29 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	314	366
0-29 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		164
0-29 Days Past Due | Acquired Loans | Home equity and lines of credit | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,404
0-29 Days Past Due | Acquired Loans | Home equity and lines of credit | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,404
0-29 Days Past Due | Total Loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,310,158	1,871,344
30-89 Days Past Due | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	687	683
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	20,402	10,830
30-89 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	13,228	5,971
30-89 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,279	0
30-89 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	11,949	5,971
30-89 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,279	0
30-89 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	322	878
30-89 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
30-89 Days Past Due | Loans Held For Investment | Commercial mortgage | Performing (Accruing) Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	11,627	5,093
30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,720	3,452
30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,369	627
30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	351	2,825
30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,692	341
30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	2,465
30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	370	0
30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Special Mention | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	307	286
30-89 Days Past Due | Loans Held For Investment | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	351	360
30-89 Days Past Due | Loans Held For Investment | Construction and land | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Construction and land | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Construction and land | Performing (Accruing) Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Loans Held For Investment | Construction and land | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,965	1,090
30-89 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	51	0
30-89 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,914	1,090
30-89 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,769	239
30-89 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	51	0
30-89 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,145	520
30-89 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Multifamily | Performing (Accruing) Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	331
30-89 Days Past Due | Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	374	135
30-89 Days Past Due | Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	374	135
30-89 Days Past Due | Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Home equity and lines of credit | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	104	122
30-89 Days Past Due | Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	51	90
30-89 Days Past Due | Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Commercial and Industrial | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	53	32
30-89 Days Past Due | Loans Held For Investment | Other loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	11	60
30-89 Days Past Due | Loans Held For Investment | Other loans | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	11	60
30-89 Days Past Due | Acquired Loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,218	1,422
30-89 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	729	521
30-89 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	729	521
30-89 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		521
30-89 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
30-89 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	729
30-89 Days Past Due | Acquired Loans | Commercial mortgage | Performing (Accruing) Loans | Substandard | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	489	901
30-89 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	489	526
30-89 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	375
30-89 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	312	526
30-89 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Pass | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	375
30-89 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	177	0
30-89 Days Past Due | Acquired Loans | One-to-four family residential mortgage | Performing (Accruing) Loans | Substandard | Greater than or Equal to 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | Construction and land | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Acquired Loans | Construction and land | Performing (Accruing) Loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Pass | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
30-89 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Special Mention | Greater Than or Equal to 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Acquired Loans | Multifamily | Performing (Accruing) Loans | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Acquired Loans | Home equity and lines of credit | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
30-89 Days Past Due | Acquired Loans | Home equity and lines of credit | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
30-89 Days Past Due | Total Loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	$ 21,620	$ 12,252

Loans - Summary Of Impaired Loa

Loans - Summary Of Impaired Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Related Allowance	$ (889)	$ (2,817)
Recorded investment	28,987	34,274
Unpaid Principal Balance	31,713	37,796
Commercial mortgage
Financing Receivable, Impaired [Line Items]
Related Allowance	(394)	(2,361)
Recorded investment	22,313	29,224
Unpaid Principal Balance	24,505	32,152
Commercial mortgage | Pass | Greater Than or Equal to 35% LTV
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	4,051	3,311
Unpaid Principal Balance With No Related Allowance Recorded	4,188	3,448
Commercial mortgage | Substandard | Less Than 35% LTV
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	0	0
Unpaid Principal Balance With No Related Allowance Recorded	139	0
Commercial mortgage | Substandard | Greater Than or Equal to 35% LTV
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	13,371	12,880
Recorded Investment With a Related Allowance Recorded	4,891	13,033
Unpaid Principal Balance With No Related Allowance Recorded	14,748	14,339
Unpaid Principal Balance With a Related Allowance Recorded	5,430	14,365
Related Allowance	(394)	(2,361)
One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Related Allowance	(282)	(119)
Recorded investment	3,746	1,927
Unpaid Principal Balance	3,810	1,927
One-to-four family residential mortgage | Pass | Less Than 60% LTV
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	221	66
Recorded Investment With a Related Allowance Recorded	503	0
Unpaid Principal Balance With No Related Allowance Recorded	221	66
Unpaid Principal Balance With a Related Allowance Recorded	503	0
Related Allowance	(33)	0
One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	0	138
Recorded Investment With a Related Allowance Recorded	0	319
Unpaid Principal Balance With No Related Allowance Recorded	0	138
Unpaid Principal Balance With a Related Allowance Recorded	0	319
Related Allowance	0	(4)
One-to-four family residential mortgage | Special Mention | Greater than or Equal to 60% LTV
Financing Receivable, Impaired [Line Items]
Recorded Investment With a Related Allowance Recorded	1,034	0
Unpaid Principal Balance With a Related Allowance Recorded	1,081	0
Related Allowance	(97)	0
One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	234	262
Recorded Investment With a Related Allowance Recorded	1,604	848
Unpaid Principal Balance With No Related Allowance Recorded	234	262
Unpaid Principal Balance With a Related Allowance Recorded	1,604	848
Related Allowance	(152)	(95)
One-to-four family residential mortgage | Substandard | Greater than or Equal to 60% LTV
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	150
Recorded Investment With a Related Allowance Recorded	0	294
Unpaid Principal Balance With No Related Allowance Recorded	167
Unpaid Principal Balance With a Related Allowance Recorded	0	294
Related Allowance	0	(20)
Multifamily
Financing Receivable, Impaired [Line Items]
Related Allowance	(158)	(215)
Recorded investment	2,458	1,990
Unpaid Principal Balance	2,928	2,461
Multifamily | Pass | Greater Than or Equal to 35% LTV
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	75	86
Unpaid Principal Balance With No Related Allowance Recorded	545	557
Multifamily | Substandard | Greater Than or Equal to 35% LTV
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	1,012	477
Recorded Investment With a Related Allowance Recorded	1,371	1,427
Unpaid Principal Balance With No Related Allowance Recorded	1,012	477
Unpaid Principal Balance With a Related Allowance Recorded	1,371	1,427
Related Allowance	(158)	(215)
Home equity and lines of credit
Financing Receivable, Impaired [Line Items]
Related Allowance	(51)	(13)
Recorded investment	354	327
Unpaid Principal Balance	354	327
Home equity and lines of credit | Pass
Financing Receivable, Impaired [Line Items]
Recorded Investment With a Related Allowance Recorded	269	0
Unpaid Principal Balance With a Related Allowance Recorded	269	0
Related Allowance	(11)	0
Home equity and lines of credit | Special Mention
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	0	49
Recorded Investment With a Related Allowance Recorded	44	278
Unpaid Principal Balance With No Related Allowance Recorded	0	49
Unpaid Principal Balance With a Related Allowance Recorded	44	278
Related Allowance	(19)	(13)
Home equity and lines of credit | Substandard
Financing Receivable, Impaired [Line Items]
Recorded Investment With a Related Allowance Recorded	41	0
Unpaid Principal Balance With a Related Allowance Recorded	41	0
Related Allowance	(21)	0
Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Related Allowance	(4)	(109)
Recorded investment	116	806
Unpaid Principal Balance	116	929
Commercial and Industrial | Special Mention
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	0	267
Recorded Investment With a Related Allowance Recorded	29	32
Unpaid Principal Balance With No Related Allowance Recorded	0	268
Unpaid Principal Balance With a Related Allowance Recorded	29	32
Related Allowance	(4)	(1)
Commercial and Industrial | Substandard
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Related Allowance Recorded	87	99
Recorded Investment With a Related Allowance Recorded	0	408
Unpaid Principal Balance With No Related Allowance Recorded	87	99
Unpaid Principal Balance With a Related Allowance Recorded	0	530
Related Allowance	$ 0	$ (108)

Loans - Impaired loans (Details

Loans - Impaired loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Average recorded investment	$ 31,978	$ 35,854
Interest income	1,473	1,190
Commercial mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment	26,665	30,674
Interest income	1,143	1,022
Construction and land
Financing Receivable, Impaired [Line Items]
Average recorded investment	0	22
Interest income	0	0
One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment	2,542	1,048
Interest income	220	39
Multifamily
Financing Receivable, Impaired [Line Items]
Average recorded investment	2,167	2,221
Interest income	96	98
Home equity and lines of credit
Financing Receivable, Impaired [Line Items]
Average recorded investment	346	735
Interest income	12	8
Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Average recorded investment	258	1,154
Interest income	2	23
Pass | Home equity and lines of credit
Financing Receivable, Impaired [Line Items]
Average recorded investment, with a related allowance	163	0
Interest income, with a related allowance	7	0
Special Mention | Home equity and lines of credit
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	29	20
Interest income, with no related allowance	0	3
Average recorded investment, with a related allowance	129	315
Interest income, with a related allowance	3	5
Special Mention | Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	59	144
Interest income, with no related allowance	0	19
Average recorded investment, with a related allowance	24	13
Interest income, with a related allowance	2	2
Substandard | Home equity and lines of credit
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	0	200
Interest income, with no related allowance	0	0
Average recorded investment, with a related allowance	25	200
Interest income, with a related allowance	2	0
Substandard | Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	93	583
Interest income, with no related allowance	0	2
Average recorded investment, with a related allowance	82	414
Interest income, with a related allowance	0	0
Less Than 35% LTV | Pass | Commercial mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	0	681
Interest income, with no related allowance	0	0
Greater Than or Equal to 35% LTV | Pass | Commercial mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	2,938	6,615
Interest income, with no related allowance	184	149
Average recorded investment, with a related allowance	668	0
Interest income, with a related allowance	0	0
Greater Than or Equal to 35% LTV | Pass | Multifamily
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	80	53
Interest income, with no related allowance	17	17
Greater Than or Equal to 35% LTV | Special Mention | Commercial mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	109	0
Interest income, with no related allowance	0	0
Average recorded investment, with a related allowance	0	580
Interest income, with a related allowance	0	0
Greater Than or Equal to 35% LTV | Substandard | Commercial mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	12,593	9,641
Interest income, with no related allowance	884	500
Average recorded investment, with a related allowance	10,357	13,157
Interest income, with a related allowance	75	373
Greater Than or Equal to 35% LTV | Substandard | Construction and land
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	0	22
Interest income, with no related allowance	0	0
Greater Than or Equal to 35% LTV | Substandard | Multifamily
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	688	714
Interest income, with no related allowance	27	27
Average recorded investment, with a related allowance	1,399	1,454
Interest income, with a related allowance	52	54
Less Than 60% LTV | Pass | One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	207	13
Interest income, with no related allowance	9	2
Average recorded investment, with a related allowance	263	0
Interest income, with a related allowance	19	0
Less Than 60% LTV | Special Mention | One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	55	213
Interest income, with no related allowance	0	7
Average recorded investment, with a related allowance	127	259
Interest income, with a related allowance	0	8
Less Than 60% LTV | Substandard | One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	188	266
Interest income, with no related allowance	22	16
Average recorded investment, with a related allowance	1,017	170
Interest income, with a related allowance	65	0
Greater than or Equal to 60% LTV | Special Mention | One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment, with a related allowance	207	0
Interest income, with a related allowance	0	0
Greater than or Equal to 60% LTV | Substandard | One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Average recorded investment, with no related allowance	101	0
Interest income, with no related allowance	3	6
Average recorded investment, with a related allowance	377	127
Interest income, with a related allowance	$ 102	$ 0

Loans - Summary Of Troubled Deb

Loans - Summary Of Troubled Debt Restructuring (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)contract	Dec. 31, 2014USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Relationships | contract	13	2
Pre-Modification Outstanding Recorded Investment	$ 10,909	$ 556
Post-Modification Outstanding Recorded Investment	$ 10,409	$ 556
Commercial mortgage
Financing Receivable, Modifications [Line Items]
Number of Relationships | contract	1
Pre-Modification Outstanding Recorded Investment	$ 6,300
Commercial mortgage | Substandard
Financing Receivable, Modifications [Line Items]
Number of Relationships | contract	3
Pre-Modification Outstanding Recorded Investment	$ 8,957
Post-Modification Outstanding Recorded Investment	$ 8,457
One-to-four family residential mortgage | Substandard
Financing Receivable, Modifications [Line Items]
Number of Relationships | contract	8	2
Pre-Modification Outstanding Recorded Investment	$ 1,889	$ 556
Post-Modification Outstanding Recorded Investment	$ 1,889	$ 556
One-to-four family residential mortgage | Pass
Financing Receivable, Modifications [Line Items]
Number of Relationships | contract	1
Pre-Modification Outstanding Recorded Investment	$ 20
Post-Modification Outstanding Recorded Investment	$ 20
Home equity and lines of credit | Substandard
Financing Receivable, Modifications [Line Items]
Number of Relationships | contract	1
Pre-Modification Outstanding Recorded Investment	$ 43
Post-Modification Outstanding Recorded Investment	$ 43

Premises And Equipment, Net - N

Premises And Equipment, Net - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 3,400,000	$ 3,600,000	$ 3,600,000
Gain on sale of premises and equipment	$ 0	$ 0	$ 397,000

Premises And Equipment, Net - P

Premises And Equipment, Net - Premises And Equipment Less Accumulated Depreciation And Amortization (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 57,976	$ 57,177
Accumulated depreciation and amortization	(34,333)	(30,951)
Premises and equipment, net	23,643	26,226
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	2,530	2,026
Buildings and improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	6,695	6,691
Capital leases
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	2,600	2,600
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	19,954	19,658
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 26,197	$ 26,202

Deposits - Narrative (Details)

Deposits - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Certificates of Deposit
Time Deposits [Line Items]
Brokered deposits	$ 157.1	$ 40.9

Deposits - Deposit Account Bala

Deposits - Deposit Account Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Banking and Thrift [Abstract]
Negotiable orders of withdrawal	$ 217,813	$ 124,961
Non-interest-bearing demand	263,073	269,466
Total transactions	480,886	394,427
Money market	548,132	440,887
Savings	524,043	432,207
Total savings	1,072,175	873,094
$250000	461,127	320,525
$250,000 or more	38,741	32,619
Total certificates of deposit	499,868	353,144
Total deposits	$ 2,052,929	$ 1,620,665
Weighted Average Rate, Negotiable orders of withdrawal	0.25%	0.34%
Weighted Average Rate, Total transactions	0.11%	0.11%
Weighted Average Rate, Money market	0.62%	0.38%
Weighted Average Rate, Savings	0.47%	0.31%
Weighted Average Rate, Total Savings	0.55%	0.35%
Weighted Average Rate, Under $250,000	1.11%	1.05%
Weighted Average Rate, $250,000 or more	1.73%	1.75%
Weighted Average Rate, Total certificates of deposit	1.15%	1.11%
Weighted Average Rate, Total deposits	0.59%	0.46%

Deposits - Maturities Of Certif

Deposits - Maturities Of Certificates Of Deposit (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Banking and Thrift [Abstract]
2,016	$ 222,419
2,017	68,452
2,018	55,585
2,019	75,574
2,020	77,825
Thereafter	13
Total certificates of deposit	$ 499,868	$ 353,144

Deposits - Interest Expense On

Deposits - Interest Expense On Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Banking and Thrift [Abstract]
Negotiable order of withdrawal and money market	$ 2,816	$ 1,766	$ 1,956
Savings-passbook and statement	2,141	445	679
Certificates of deposit	5,466	3,180	3,866
Total interest expense on deposits	$ 10,423	$ 5,391	$ 6,501

Borrowings - Narrative (Details

Borrowings - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Short Term And Long Term Debt [Line Items]
FHLB advances	$ 698.8
Unencumbered securities	128.5
Multifamily loans held as collateral	$ 570.3
Repurchase agreements
Schedule Of Short Term And Long Term Debt [Line Items]
Weighted average interest rate	2.77%	1.69%
Maturity in the first quarter	$ 51	$ 109.2
Maturity in more than 90 days	12	94
Repurchase agreements | Mortgage Backed Securities
Schedule Of Short Term And Long Term Debt [Line Items]
Mortgage-backed securities amortized cost	69.1	213.9
Mortgage-backed securities held for sale fair value	$ 70.7	$ 218.3
Repurchase agreements | Maturity over 90 days
Schedule Of Short Term And Long Term Debt [Line Items]
Maturity period	90 days

Borrowings - Summary Of Borrowi

Borrowings - Summary Of Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Repurchase agreements	$ 63,000	$ 203,200
Other borrowings:
FHLB advances	487,130	572,493
Floating rate advances	7,272	2,058
Obligations under capital leases	727	907
Total long term debt	$ 558,129	$ 778,658

Borrowings - Contractual Maturi

Borrowings - Contractual Maturities Repurchase Agreements And FHLB Advances (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Long Term Debt Maturities Repayments Of Principal [Line Items]
Total long term debt	$ 558,129	$ 778,658
Repurchase agreements
Long Term Debt Maturities Repayments Of Principal [Line Items]
2,016	55,000
2,017	6,000
2,018	2,000
2,019	0
2,020	0
Total long term debt	63,000
FHLB advances
Long Term Debt Maturities Repayments Of Principal [Line Items]
2,016	83,910
2,017	159,003
2,018	140,715
2,019	58,502
2,020	45,000
Total long term debt	$ 487,130

Borrowings - Summary Of Interes

Borrowings - Summary Of Interest Expense On Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest Expense [Line Items]
Interest expense	$ 9,265	$ 9,961	$ 10,447
FHLB advances
Interest Expense [Line Items]
Interest expense	6,742	5,717	3,836
Floating rate advances
Interest Expense [Line Items]
Interest expense	17	3	10
Obligations under capital leases
Interest Expense [Line Items]
Interest expense	60	80	109
Repurchase agreements
Interest Expense [Line Items]
Interest expense	$ 2,446	$ 4,161	$ 6,492

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Bad debt base year reserve	$ 5.9	$ 5.9
Federal tax bad debt deferred tax liability	$ 2.8	$ 2.8

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Federal tax expense (benefit):
Current	$ 11,796	$ 11,195	$ 12,493
Deferred	(2,305)	(1,675)	(2,758)
Federal tax expense (benefit)	9,491	9,520	9,735
State and local tax expense (benefit):
Current	1,811	1,828	2,276
Deferred	673	508	(1,275)
State and local tax expense (benefit)	2,484	2,336	1,001
Income tax expense	$ 11,975	$ 11,856	$ 10,736

Income Taxes - Reconciliation B

Income Taxes - Reconciliation Between The Amount Of Reported Total Income Tax Expense And The Amount Computed By Multiplying The Applicable Statutory Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Tax expense at statutory rate of 35%	$ 11,027	$ 11,242	$ 10,459
Increase (decrease) in taxes resulting from:
State tax, net of federal income tax	1,615	1,519	651
Bank owned life insurance	(1,319)	(1,366)	(1,262)
Merger related costs	201	0	0
Incentive stock options	210	134	149
Uncertain tax position	51	131	448
Other, net	190	196	291
Income tax expense	$ 11,975	$ 11,856	$ 10,736
Statutory Rate	35.00%	35.00%	35.00%

Income Taxes - Tax Effects Of T

Income Taxes - Tax Effects Of Temporary Differences That Give Rise To Significant Portions Of The Deferred Tax Assets And Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Allowance for loan losses	$ 9,514	$ 10,302
Capitalized leases	287	369
Deferred compensation	2,450	2,577
Accrued salaries	910	950
Postretirement benefits	555	523
Equity awards	4,707	2,930
Unrealized actuarial losses on post retirement benefits	217	226
Straight-line leases adjustment	1,099	1,083
Asset retirement obligation	97	100
Reserve for accrued interest receivable	775	1,220
Reserve for loan commitments	127	184
Employee Stock Ownership Plan	532	308
Other	358	398
Depreciation	2,123	1,616
Fair value adjustments of acquired loans	7,105	6,247
Fair value adjustments of pension benefit obligations	267	306
Unrealized losses securities	1,780	291
Total gross deferred tax assets	32,903	29,630
Deferred tax liabilities:
Fair value adjustments of acquired securities	9	13
Fair value adjustments of deposit liabilities	30	27
Deferred loan fees	1,777	1,639
Other	21	0
Total gross deferred tax liabilities	1,837	1,679
Net deferred tax asset	$ 31,066	$ 27,951

Income Taxes - Reconciliation O

Income Taxes - Reconciliation Of Uncertain Tax Position (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	$ 230	$ 679	$ 231
Settlements based on tax positions related to prior years	0	(580)	0
Additions based on tax positions related to prior years	51	131	448
Unrecognized Tax Benefits, Ending Balance	$ 230	$ 679	$ 231	$ 281

Retirement Benefits - Narrative

Retirement Benefits - Narrative (Details)	12 Months Ended
	Dec. 31, 2015USD ($)$ / sharespaymentshares	Dec. 31, 2014USD ($)shares	Dec. 31, 2013USD ($)	Dec. 31, 2006USD ($)
Defined Benefit Plan Disclosure [Line Items]
Requisite service period for employees to be eligible for 401(k) plan	3 months
Percent of employer match on employee contributions	25.00%
Percent of base compensation contributed by eligible employees	6.00%
Contribution plan participation period (years)	3 years
Company contribution amount	$ 321,000	$ 292,000	$ 266,000
ESOP compensation expense	1,900,000	1,700,000	1,500,000
Estimated loss that will be amortized from accumulated other comprehensive income (loss) into net periodic cost	54,000
Prior service cost that will be amortized from accumulated other comprehensive income (loss) into net periodic cost	12,000
Transition obligation that will be amortized from accumulated other comprehensive income (loss) into net periodic cost	$ 0
Medical cost trend rate	8.75%
Medical cost trend rate reduction percent per year	0.50%
Medical cost trend rate ultimate rate	4.75%
Benefits paid	$ 116,000	85,000	94,000
Benefits expected to be paid under the postretirement health benefits plan in 2016	125,000
Benefits expected to be paid under the postretirement health benefits plan in 2017	130,000
Benefits expected to be paid under the postretirement health benefits plan in 2018	134,000
Benefits expected to be paid under the postretirement health benefits plan in 2019	137,000
Benefits expected to be paid under the postretirement health benefits plan in 2020	140,000
Benefits expected to be paid under the postretirement health benefits plan in 2021 through 2025	709,000
Pre-tax gain	937,000
Benefit plan (income) expenses	$ (392,000)	(153,000)	963,000
Number of monthly payments | payment	120
Agreement monthly payment	$ 17,450
Present value of agreement obligation	154,000	350,000		$ 1,625,000
Supplemental Employee Retirement Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation	$ 6,900,000	6,500,000
Minimum
Defined Benefit Plan Disclosure [Line Items]
Percent of compensation employees can invest in 401(k) plan	2.00%
Matching contribution percent	25.00%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Percent of compensation employees can invest in 401(k) plan	15.00%
Matching contribution percent	50.00%
First ESOP
Defined Benefit Plan Disclosure [Line Items]
Employee stock ownership plan, shares authorized and purchased | shares	2,463,884
Initial public offering price (usd per share) | $ / shares	$ 7.13
Outstanding loan balance	$ 12,700,000	$ 13,300,000
Shares released and allocated to participants | shares	80,131	80,728
Second ESOP
Defined Benefit Plan Disclosure [Line Items]
Employee stock ownership plan, shares authorized and purchased | shares	1,422,357
Initial public offering price (usd per share) | $ / shares	$ 10
Outstanding loan balance	$ 13,300,000	$ 13,600,000
Shares released and allocated to participants | shares	47,384	47,412
Supplemental ESOP
Defined Benefit Plan Disclosure [Line Items]
Company contribution to SESOP plan	$ 82,000	$ 7,000	$ 38,000

Retirement Benefits - Funded St

Retirement Benefits - Funded Status And Components Of Post Retirement Benefit Costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Net income	$ 19,531	$ 20,266	$ 19,147
Benefits paid	(116)	(85)	(94)
Other Pension Plans, Defined Benefit
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Accumulated postretirement benefit obligation beginning of year	1,846	1,294	1,778
Service cost	9	6	9
Interest cost	62	53	56
Actuarial loss (gain)	149	578	(455)
Benefits paid	(116)	(85)	(94)
Accumulated postretirement benefit obligation end of year	1,950	1,846	1,294
Accrued liability (included in accrued expenses and other liabilities)	$ 1,950	$ 1,846	$ 1,294

Retirement Benefits - Amounts R

Retirement Benefits - Amounts Recognized In Accumulated Other Comprehensive Income (Loss) (Details) - Other Pension Plans, Defined Benefit - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Net loss	$ 578	$ 473
Transition obligation	0	17
Prior service cost	12	50
Loss recognized in accumulated other comprehensive income	$ 590	$ 540

Retirement Benefits - Component

Retirement Benefits - Components Of Net Periodic Post Retirement Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Amortization of transition obligation	$ 0
Amortization of prior service costs	12
Other Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	9	$ 6	$ 9
Interest cost	62	53	56
Amortization of transition obligation	17	17	17
Amortization of prior service costs	38	24	16
Amortization of unrecognized (gain) loss	44	(11)	36
Net postretirement benefit cost included in compensation and employee benefits	$ 170	$ 89	$ 134

Retirement Benefits - Defined B

Retirement Benefits - Defined Benefit Plan, Assumptions Used In Accounting For The Plan (Details) - Other Pension Plans, Defined Benefit	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assumptions used to determine benefit obligation at period end:
Discount rate	3.75%	3.50%	4.25%
Rate of increase in compensation	4.00%	4.00%	4.00%
Assumptions used to determine net periodic benefit cost for the year:
Discount rate	3.50%	4.25%	3.25%
Rate of increase in compensation	4.00%	4.00%	4.00%

Retirement Benefits - Summary O

Retirement Benefits - Summary Of Percentage Point Change In Assumed Health Care Cost Trends (Details) - Other Pension Plans, Defined Benefit - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Aggregate of service and interest components of net periodic cost (benefit), one percentage point increase	$ 6	$ 4	$ 5
Aggregate of service and interest components of net periodic cost (benefit), one percentage point decrease	(4)	(3)	$ (4)
Effect on accumulated postretirement benefit obligation, one percentage point increase	156	153
Effect on accumulated postretirement benefit obligation, one percentage point decrease	$ (139)	$ (135)

Equity Incentive Plan - Narrati

Equity Incentive Plan - Narrative (Details) - USD ($) $ in Millions	May. 27, 2015	Dec. 08, 2014	Jun. 11, 2014	Jul. 26, 2013	Jan. 30, 2010	May. 29, 2009	Jan. 30, 2009	May. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted									419,000	1,001,200
Stock options granted									1,090,000	2,502,600
Allocated stock-based compensation expense									$ 6.8	$ 2.8	$ 3.2
2014 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted										1,001,200
Stock options granted										2,502,600
Shares authorized under equity incentive plan								4,978,249
Expected life		6 years 6 months
Risk free return		1.81%	1.92%
Volatility		32.92%	33.83%
Dividend rate		1.68%	1.83%
2008 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under equity incentive plan									4,311,796
Vesting period (years)									5 years
Beginning of vesting period (years)									1 year
Expected life				6 years 6 months	6 years 6 months	6 years 6 months	6 years 6 months
Risk free return				1.39%	2.90%	2.88%	2.17%
Volatility				35.33%	38.29%	38.39%	35.33%
Dividend rate				1.98%	1.81%	1.50%	1.61%
Method used to estimate fair value				Black-Scholes option pricing model	Black-Scholes option pricing model	Black-Scholes option pricing model	Black-Scholes option pricing model
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted								419,000
Expected future stock-based compensation expense									$ 13.9
Average period of expected future stock option expense									3 years 9 months 18 days
Restricted Stock | 2014 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under equity incentive plan								1,422,357
Shares available for issuance under equity incentive plan									43,877
Restricted Stock | 2008 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance under equity incentive plan									60,085
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted								1,090,000
Vesting period (years)								5 years		5 years
Beginning of vesting period (years)								1 year		1 year
Stock option expiration period (years)								10 years		10 years
Expected life	6 years 6 months		6 years 6 months
Risk free return	1.67%
Volatility	32.06%
Dividend rate	1.90%
Expected future stock-based compensation expense									$ 10.2
Average period of expected future stock option expense									3 years 9 months 18 days
Stock Options | 2014 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under equity incentive plan								3,555,892
Shares available for issuance under equity incentive plan									54,332
Stock Options | 2008 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option expiration period (years)									10 years
Shares available for issuance under equity incentive plan									151,445

Equity Incentive Plan - Stock O

Equity Incentive Plan - Stock Options Outstanding (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding (shares) - Beginning Balance	5,138,072	2,800,305
Granted (shares)	1,090,000	2,502,600
Forfeited (shares)	(73,040)	(18,000)
Exercised (shares)	(143,171)	(146,833)
Outstanding (shares) - Ending Balance	6,011,861	5,138,072	2,800,305
Exercisable (shares)	2,973,603
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding (usd per share) - Beginning Balance	$ 3.08	$ 2.30
Granted (usd per share)	4.07	3.91
Forfeited (usd per share)	3.91	3.91
Exercised (usd per share)	2.33	2.30
Outstanding (usd per share) - Ending Balance	3.30	3.08	$ 2.30
Exercisable (usd per share)	2.57
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding (usd per share) - Beginning Balance	10.04	7.13
Granted (usd per share)	14.76	13.13
Forfeited (usd per share)	13.13	13.13
Exercised (usd per share)	7.22	7.11
Outstanding (usd per share) - Ending Balance	10.93	$ 10.04	$ 7.13
Exercisable (usd per share)	$ 8.08
Outstanding, weighted average contractual life (years)	6 years 4 months 28 days	7 years 5 months 9 days	5 years 1 month 28 days
Granted, weighted average contractual life (years)	9 years 4 months 28 days	9 years 5 months 12 days
Exercisable, weighted average contractual life (years)	3 years 11 months 19 days

Equity Incentive Plan - Status

Equity Incentive Plan - Status Of The Company's Restricted Share Awards (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested (shares) - Beginning Balance	1,003,074	240,083
Granted (shares)	419,000	1,001,200
Vested (shares)	(196,492)	(228,209)
Forfeited (shares)	(31,720)	(10,000)
Non-vested (shares) - Ending Balance	1,193,862	1,003,074
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested (usd per share) - Beginning Balance	$ 13.11	$ 7.29
Granted (usd per share)	14.76	13.13
Vested (usd per share)	13.09	7.16
Forfeited (usd per share)	13.13	13.13
Non-vested (usd per share) - Ending Balance	$ 13.70	$ 13.11

Commitments And Contingencies -

Commitments And Contingencies - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Guarantees extend term period (years)	1 year
Allowance for estimated losses on commitments	$ 318	$ 472
Net rental expense	$ 4,600	$ 4,300	$ 4,200
Agreements term (years)	3 years

Commitments And Contingencies84

Commitments And Contingencies - Commitment And Contingent Liabilities Not Reflected In Consolidated Financial Statements (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Commitments to extend credit
Commitments and contingent liabilities	$ 18,400	$ 72,438
Unused lines of credit
Commitments and contingent liabilities	69,414	60,598
Standby letters of credit
Commitments and contingent liabilities	$ 471	$ 420

Commitments And Contingencies85

Commitments And Contingencies - The Projected Minimum Annual Rental Payments And Receipts Under The Capitalized Leases And Operating Leases (Details) $ in Thousands	Dec. 31, 2015USD ($)
Commitments and Contingencies Disclosure [Abstract]
Capitalized Leases, 2016	$ 247
Capitalized Leases, 2017	254
Capitalized Leases, 2018	262
Capitalized Leases, 2019	44
Capitalized Leases, 2020	0
Capitalized Leases, Thereafter	0
Capitalized Leases, Total minimum lease payments	807
Operating Leases, 2016	4,294
Operating Leases, 2017	4,185
Operating Leases, 2018	3,805
Operating Leases, 2019	3,463
Operating Leases, 2020	3,452
Operating Leases, Thereafter	26,645
Operating Leases, Total minimum lease payments	$ 45,844

Regulatory Requirements - Narra

Regulatory Requirements - Narrative (Details)	Dec. 31, 2015	Jan. 01, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 Capital (to risk-weighted assets), for capital adequacy purposes ratio	4.50%	4.50%
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes ratio	6.00%	6.00%	4.00%
Total capital (to risk-weighted assets), for capital adequacy purposes ratio	8.00%
Tier 1 capital (core) (to adjusted total assets), for capital adequacy purposes ratio	4.00%
Tier 1 capital (core) (to adjusted total assets), for well capitalized under prompt corrective action provisions ratio	5.00%
Common Equity Tier 1 Capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio	6.50%
Tier 1 risk-based capital ratio	8.00%
Total capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio	10.00%
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets, Higher Risk Weight		150.00%
Common Equity Tier 1 Capital (to risk-weighted assets), ratio	22.15%	2.50%

Regulatory Requirements - Regul

Regulatory Requirements - Regulatory Capital Amounts And Ratios Compared To Regulatory Requirements (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Jan. 01, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 Capital (to risk-weighted assets), amount	$ 546,564
Common Equity Tier 1 Capital (to risk-weighted assets), ratio	22.15%	2.50%
Common Equity Tier 1 Capital (to risk-weighted assets), for capital adequacy purposes amount	$ 111,025
Common Equity Tier 1 Capital (to risk-weighted assets), for capital adequacy purposes ratio	4.50%	4.50%
Common Equity Tier 1 Capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions amount	$ 160,369
Common Equity Tier 1 Capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio	6.50%
Tier 1 capital (core) (to adjusted total assets), amount	$ 546,564
Tier 1 capital (core) (to adjusted total assets), ratio	17.25%
Tier 1 capital (core) (to adjusted total assets), for capital adequacy purposes amount	$ 126,764
Tier 1 capital (core) (to adjusted total assets), for capital adequacy purposes ratio	4.00%
Tier 1 capital (core) (to adjusted total assets), for well capitalized under prompt corrective action provisions amount	$ 158,455
Tier 1 capital (core) (to adjusted total assets), for well capitalized under prompt corrective action provisions ratio	5.00%
Tier 1 capital (to risk-weighted assets), amount	$ 546,564
Tier 1 capital (to risk-weighted assets), ratio	22.15%
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes amount	$ 148,033
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes ratio	6.00%	6.00%	4.00%
Tier 1 capital (to risk-weighted assets) for well capitalized under prompt corrective action provisions amount	$ 197,378
Tier 1 capital (to risk-weighted assets) for well capitalized under prompt corrective action provisions ratio	8.00%
Total capital (to risk-weighted assets), actual	$ 571,720
Total capital (to risk-weighted assets), ratio	23.17%
Total capital (to risk-weighted assets), for capital adequacy purposes amount	$ 197,378
Total capital (to risk-weighted assets), for capital adequacy purposes ratio	8.00%
Total capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions amount	$ 246,722
Total capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio	10.00%
Subsidiaries
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 Capital (to risk-weighted assets), amount	$ 498,067
Common Equity Tier 1 Capital (to risk-weighted assets), ratio	20.19%
Common Equity Tier 1 Capital (to risk-weighted assets), for capital adequacy purposes amount	$ 111,025
Common Equity Tier 1 Capital (to risk-weighted assets), for capital adequacy purposes ratio	4.50%
Common Equity Tier 1 Capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions amount	$ 160,369
Common Equity Tier 1 Capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio	6.50%
Tangible capital to tangible assets, actual			$ 494,131
Tangible capital to tangible assets, ratio			16.46%
Tangible capital to tangible assets, for capital adequacy purposes amount			$ 45,036
Tangible capital to tangible assets, for capital adequacy purposes ratio			1.50%
Tier 1 capital (core) (to adjusted total assets), amount	$ 498,067		$ 494,131
Tier 1 capital (core) (to adjusted total assets), ratio	15.72%		16.46%
Tier 1 capital (core) (to adjusted total assets), for capital adequacy purposes amount	$ 126,744		$ 120,096
Tier 1 capital (core) (to adjusted total assets), for capital adequacy purposes ratio	4.00%		4.00%
Tier 1 capital (core) (to adjusted total assets), for well capitalized under prompt corrective action provisions amount	$ 158,429		$ 150,119
Tier 1 capital (core) (to adjusted total assets), for well capitalized under prompt corrective action provisions ratio	5.00%		5.00%
Tier 1 capital (to risk-weighted assets), amount	$ 498,067
Tier 1 capital (to risk-weighted assets), ratio	20.19%
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes amount	$ 148,033
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes ratio	6.00%
Tier 1 capital (to risk-weighted assets) for well capitalized under prompt corrective action provisions amount	$ 197,378
Tier 1 capital (to risk-weighted assets) for well capitalized under prompt corrective action provisions ratio	8.00%
Total capital (to risk-weighted assets), actual	$ 523,223		$ 520,875
Total capital (to risk-weighted assets), ratio	21.21%		22.95%
Total capital (to risk-weighted assets), for capital adequacy purposes amount	$ 197,378		$ 181,585
Total capital (to risk-weighted assets), for capital adequacy purposes ratio	8.00%		8.00%
Total capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions amount	$ 246,722		$ 226,982
Total capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio	10.00%		10.00%

Fair Value Measurement - Narrat

Fair Value Measurement - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Transfers of securities between Level 1 and Level 2	$ 0
Impaired loans held-for-investment and held-for-sale with outstanding principal balances	17,000,000	$ 23,700,000
Estimated fair value of impaired loans held-for-investment and held-for-sale	13,600,000	20,300,000
Increase (decrease) in reserve for impaired loans	(725,000)	123,000
Net impairment charge-offs	1,900,000	390,000
Assets acquired through foreclosure, or deed in lieu of foreclosure	$ 45,000	$ 752,000
Maturity period of cash and cash equivalents	three months or less
Maturity period of certificates of deposit minimum	six-months or less
Maturity period of certificates of deposit maximum	six months or greater

Fair Value Measurement - Fair V

Fair Value Measurement - Fair Value, Assets And Liabilities Measured On Recurring And Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	$ 541,595	$ 771,239
Trading securities	6,713	6,422
Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	541,595	771,239
Trading securities	6,713	6,422
Total assets measured on a recurring basis	548,308	777,661
Recurring Basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	481	410
Trading securities	6,713	6,422
Total assets measured on a recurring basis	7,194	6,832
Recurring Basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	541,114	770,829
Total assets measured on a recurring basis	541,114	770,829
Recurring Basis | GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	529,524	699,790
Recurring Basis | GSE | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	529,524	699,790
Recurring Basis | Non-GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	579	1,026
Recurring Basis | Non-GSE | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	579	1,026
Recurring Basis | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other securities	11,011	70,013
Recurring Basis | Corporate bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other securities	11,011	70,013
Recurring Basis | Equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other securities	481	410
Recurring Basis | Equities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other securities	481	410
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	13,555	19,901
Commercial and industrial loans	25	440
Other real estate owned	45	752
Total assets measured on a non-recurring basis	13,625	21,093
Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	13,555	19,901
Commercial and industrial loans	25	440
Other real estate owned	45	752
Total assets measured on a non-recurring basis	13,625	21,093
Nonrecurring | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	9,091	17,438
Nonrecurring | Commercial real estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	9,091	17,438
Nonrecurring | One-to-four family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	2,873	672
Nonrecurring | One-to-four family residential mortgage | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	2,873	672
Nonrecurring | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,288	1,513
Nonrecurring | Multifamily | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,288	1,513
Nonrecurring | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	303	278
Nonrecurring | Home equity and lines of credit | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 303	$ 278

Fair Value Measurement - Qualit

Fair Value Measurement - Qualitative Information For Level 3 Assets Measured At Fair Value On A Non-Recurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Unobservable Inputs One | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 13,580	$ 20,341
Valuation Methodology	Appraisals	Appraisals
Unobservable Inputs	Discount for costs to sell	Discount for costs to sell
Range of Inputs	7.00%	7.00%
Unobservable Inputs One | Other real estate owned
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 45	$ 752
Valuation Methodology	Appraisals	Appraisals
Unobservable Inputs	Discount for costs to sell	Discount for costs to sell
Range of Inputs	7.00%	7.00%
Unobservable Inputs Two | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	Discount for quick sale	Discount for quick sale
Range of Inputs	10.00%
Unobservable Inputs Two | Minimum | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range of Inputs		10.00%
Unobservable Inputs Two | Maximum | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range of Inputs		40.00%
Unobservable Inputs Three | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Valuation Methodology	Discounted cash flows	Discounted cash flows
Unobservable Inputs	Interest rates	Interest rates
Unobservable Inputs Three | Minimum | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range of Inputs	4.75%	4.60%
Unobservable Inputs Three | Maximum | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range of Inputs	7.50%	7.50%

Fair Value Measurement - Estima

Fair Value Measurement - Estimated Fair Values Of The Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financial assets:
Trading securities	$ 6,713	$ 6,422
Securities available-for-sale	541,595	771,239
Securities held-to-maturity	10,369	3,691
Carrying Value
Financial assets:
Cash and cash equivalents	51,853	76,709
Trading securities	6,713	6,422
Securities available-for-sale	541,595	771,239
Securities held-to-maturity	10,346	3,609
FHLB of New York stock, at cost	25,803	29,219
Net loans held-for-investment	2,348,945	1,942,995
Financial liabilities:
Deposits	2,052,929	1,620,665
Repurchase agreements and other borrowings	558,129	778,658
Advance payments by borrowers	10,862	7,792
Estimated Fair Value
Financial assets:
Cash and cash equivalents	51,853	76,709
Trading securities	6,713	6,422
Securities available-for-sale	541,595	771,239
Securities held-to-maturity	10,369	3,691
FHLB of New York stock, at cost	25,803	29,219
Net loans held-for-investment	2,375,028	1,949,511
Financial liabilities:
Deposits	2,058,894	1,622,536
Repurchase agreements and other borrowings	557,537	781,196
Advance payments by borrowers	10,862	7,792
Estimated Fair Value | Level 1
Financial assets:
Cash and cash equivalents	51,853	76,709
Trading securities	6,713	6,422
Securities available-for-sale	481	410
Estimated Fair Value | Level 2
Financial assets:
Securities available-for-sale	541,114	770,829
Securities held-to-maturity	10,369	3,691
FHLB of New York stock, at cost	25,803	29,219
Financial liabilities:
Deposits	2,058,894	1,622,536
Repurchase agreements and other borrowings	557,537	781,196
Advance payments by borrowers	10,862	7,792
Estimated Fair Value | Level 3
Financial assets:
Net loans held-for-investment	$ 2,375,028	$ 1,949,511

Stock Repurchase Program (Detai

Stock Repurchase Program (Details) - USD ($) $ in Millions	Dec. 31, 2015	May. 27, 2015	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Stock repurchase program, remaining number of shares to be purchased	0		2,175,785
Stock repurchase program, remaining approved repurchase amount			$ 32.2
Stock repurchased program, authorized amount		$ 15	$ 170

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 19,531	$ 20,266	$ 19,147
Basic weighted average shares outstanding (in shares)	42,285,712	49,006,129	54,637,680
Effect of non-vested restricted stock and stock options outstanding (in shares)	1,192,769	1,026,130	922,629
Weighted average shares outstanding-diluted (in shares)	43,478,481	50,032,259	55,560,309
Earnings per share-basic (usd per share)	$ 0.46	$ 0.41	$ 0.35
Earnings per share-diluted (usd per share)	$ 0.45	$ 0.41	$ 0.34
Anti-dilutive shares	2,679,507	1,471,303	0

Parent-Only Financial Informa94

Parent-Only Financial Information - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
ASSETS:
Interest-earning deposits in other financial institutions	$ 36,529	$ 61,742
Other assets	36,437	36,801
Total assets	3,202,584	3,020,869
LIABILITIES AND STOCKHOLDERS’ EQUITY:
Total liabilities	2,642,805	2,426,941
Total stockholders' equity	559,779	593,928	$ 716,108	$ 414,873
Total liabilities and stockholders' equity	3,202,584	3,020,869
Parent Company
ASSETS:
Cash in Northfield Bank	22,504	53,681
Interest-earning deposits in other financial institutions	21	2,636
Investment in Northfield Bank	511,283	509,809
ESOP loan receivable	26,012	26,934
Other assets	516	1,048
Total assets	560,336	594,108
LIABILITIES AND STOCKHOLDERS’ EQUITY:
Total liabilities	557	180
Total stockholders' equity	559,779	593,928
Total liabilities and stockholders' equity	$ 560,336	$ 594,108

Parent-Only Financial Informa95

Parent-Only Financial Information - Condensed Statements Of Income And Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income tax expense									$ 11,975	$ 11,856	$ 10,736
Net income									19,531	20,266	19,147
Other comprehensive (loss) income, net of tax									(2,221)	3,885	(22,881)
Comprehensive income (loss)									17,310	24,151	(3,734)
Parent Company
Interest on ESOP loan									875	903	904
Interest income on deposit in Northfield Bank									51	251	286
Interest income on corporate bonds									0	0	13
Gain on securities transactions, net									(4)	(2)	0
Undistributed earnings of Northfield Bank									19,718	20,331	19,157
Total income									20,640	21,483	20,360
Other expenses									891	956	1,188
Income tax expense	$ 3,464	$ 2,515	$ 3,410	$ 2,586	$ 2,857	$ 2,496	$ 2,915	$ 3,588	218	261	25
Total expense									1,109	1,217	1,213
Net income	$ 5,557	$ 4,677	$ 4,295	$ 5,002	$ 4,878	$ 4,729	$ 5,440	$ 5,219	19,531	20,266	19,147
Other comprehensive (loss) income, net of tax									(2,221)	3,885	(22,881)
Comprehensive income (loss)									$ 17,310	$ 24,151	$ (3,734)

Parent-Only Financial Informa96

Parent-Only Financial Information - Condensed Statements Of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income									$ 19,531	$ 20,266	$ 19,147
Adjustments to reconcile net income to net cash provided by operating activities:
(Increase) decrease in accrued interest receivable									(248)	122	17
Decrease (increase) in other assets									3,359	(2,948)	978
Cash flows from investing activities:
Maturities of corporate bonds									173,923	161,650	331,536
Cash flows from financing activities:
Proceeds from sale of common stock									0	0	54,648
Merger of Northfield Bancorp, MHC									0	0	124
Exercise of stock options									158	212	21
Additional tax benefit on stock awards									122	390	296
Net (decrease) increase in cash and cash equivalents									(24,856)	15,470	(67,522)
Cash and cash equivalents at beginning of period				$ 76,709				$ 61,239	76,709	61,239	128,761
Cash and cash equivalents at end of period	$ 51,853				$ 76,709				51,853	76,709	61,239
Parent Company
Cash flows from operating activities:
Net income	5,557	$ 4,677	$ 4,295	5,002	4,878	$ 4,729	$ 5,440	5,219	19,531	20,266	19,147
Adjustments to reconcile net income to net cash provided by operating activities:
(Increase) decrease in accrued interest receivable									0	0	94
Decrease in due to Northfield Bank									0	0	(541)
Decrease (increase) in other assets									(453)	(969)	1,271
Increase (decrease) in other liabilities									377	(362)	(556)
Undistributed earnings of Northfield Bank									(19,718)	(20,329)	(19,157)
Net cash (used in) provided by operating activities									(263)	(1,394)	258
Cash flows from investing activities:
Additional investment in Northfield Bank									0	0	(172,299)
Dividends from Northfield Bank									25,900	66,274	0
Maturities of corporate bonds									0	0	5,173
Loan to ESOP									0	0	(14,224)
Net cash provided by (used in) investing activities									25,900	66,274	(181,350)
Cash flows from financing activities:
Proceeds from sale of common stock									0	0	344,202
Principal payments on ESOP loan receivable									922	865	950
Purchase of treasury stock									(48,446)	(138,702)	(3,628)
Dividends paid									(12,184)	(12,884)	(26,859)
Merger of Northfield Bancorp, MHC									0	0	124
Exercise of stock options									158	212	21
Additional tax benefit on stock awards									122	390	296
Net cash (used in) provided by financing activities									(59,428)	(150,119)	315,106
Net (decrease) increase in cash and cash equivalents									(33,791)	(85,239)	134,014
Cash and cash equivalents at beginning of period				$ 56,316				$ 141,555	56,316	141,555	7,541
Cash and cash equivalents at end of period	$ 22,525				$ 56,316				$ 22,525	$ 56,316	$ 141,555

Selected Quarterly Financial 97

Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest income									$ 101,758	$ 91,701	$ 92,470
Interest expense									19,688	15,352	16,948
Net interest income									82,070	76,349	75,522
Provision for loan losses									353	645	1,927
Net interest income after provision for loan losses									81,717	75,704	73,595
Other income									7,898	8,460	10,161
Other expenses									58,109	52,042	53,873
Income before income tax expense									31,506	32,122	29,883
Income tax expense									11,975	11,856	10,736
Net income									$ 19,531	$ 20,266	$ 19,147
Net income per common share-basic (usd per share)									$ 0.46	$ 0.41	$ 0.35
Net income per common share-diluted (usd per share)									$ 0.45	$ 0.41	$ 0.34
Parent Company
Interest income	$ 26,398	$ 25,570	$ 25,037	$ 24,753	$ 24,079	$ 22,707	$ 22,151	$ 22,764
Interest expense	5,170	4,997	4,752	4,769	4,335	3,737	3,631	3,649
Net interest income	21,228	20,573	20,285	19,984	19,744	18,970	18,520	19,115
Provision for loan losses	(119)	200	72	200	57	317	(146)	417
Net interest income after provision for loan losses	21,347	20,373	20,213	19,784	19,687	18,653	18,666	18,698
Other income	2,122	1,666	2,006	2,104	2,061	1,840	2,387	2,172
Other expenses	14,448	14,847	14,514	14,300	14,013	13,268	12,698	12,063
Income before income tax expense	9,021	7,192	7,705	7,588	7,735	7,225	8,355	8,807
Income tax expense	3,464	2,515	3,410	2,586	2,857	2,496	2,915	3,588	$ 218	$ 261	$ 25
Net income	$ 5,557	$ 4,677	$ 4,295	$ 5,002	$ 4,878	$ 4,729	$ 5,440	$ 5,219	$ 19,531	$ 20,266	$ 19,147
Net income per common share-basic (usd per share)	$ 0.13	$ 0.11	$ 0.10	$ 0.11	$ 0.11	$ 0.10	$ 0.11	$ 0.10
Net income per common share-diluted (usd per share)	$ 0.13	$ 0.11	$ 0.10	$ 0.11	$ 0.11	$ 0.10	$ 0.11	$ 0.10

Subsequent Event (Details)

Subsequent Event (Details) $ / shares in Units, $ in Thousands	Jan. 08, 2016USD ($)$ / sharesshares	Dec. 31, 2015USD ($)branch	Dec. 31, 2014USD ($)
Subsequent Event [Line Items]
Assets		$ 3,202,584	$ 3,020,869
Hopewell Valley Community Bank
Subsequent Event [Line Items]
Assets		$ 508,300
Number of branches | branch		9
Subsequent Event | Hopewell Valley
Subsequent Event [Line Items]
Total consideration transferred	$ 55,400
Cash consideration	$ 13,700
Consideration transferred, common stock (usd per share) | $ / shares	$ 15.41
Subsequent Event | Hopewell Valley | Common Stock
Subsequent Event [Line Items]
Consideration transferred, common stock (shares) | shares	2,707,381
Consideration transferred, value of common stock	$ 41,700