Northfield Bancorp, Inc. (NFBK) 10-K 1 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 22, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
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	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		49,773,796
Entity Current Reporting Status	Yes
Entity Public Float			$ 717,731,376
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
ASSETS:
Cash and due from banks	$ 15,147	$ 17,446
Interest-bearing deposits in other financial institutions	62,615	40,393
Total cash and cash equivalents	77,762	57,839
Trading securities	8,968	9,597
Debt securities available-for-sale, at estimated fair value	808,031	513,782
Held-to-maturity Securities	9,505	9,931
Equity securities	1,280	1,339
Originated loans held-for-investment, net	2,678,877	2,425,275
Loans acquired	546,150	692,803
Purchased credit-impaired (PCI) loans held-for-investment	20,143	22,741
Loans held-for-investment, net	3,245,170	3,140,819
Allowance for loan losses	(27,497)	(26,160)
Net loans held-for-investment	3,217,673	3,114,659
Accrued interest receivable	12,959	10,713
Bank owned life insurance	154,135	150,604
Federal Home Loan Bank (FHLB) of New York stock, at cost	22,517	25,046
Premises and equipment, net	25,605	25,746
Goodwill	38,411	38,411
Other real estate owned	0	850
Other assets	31,586	32,900
Total assets	4,408,432	3,991,417
LIABILITIES:
Deposits	3,286,512	2,836,979
Securities sold under agreements to repurchase	0	2,000
Other borrowings	408,891	469,549
Advance payments by borrowers for taxes and insurance	18,007	14,798
Accrued expenses and other liabilities	28,583	29,214
Total liabilities	3,741,993	3,352,540
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, 60,933,707 shares issued at December 31, 2018 and 2017, 49,635,673 and 48,803,885 outstanding at December 31, 2018 and 2017, respectively	609	609
Additional paid-in-capital	546,219	548,864
Unallocated common stock held by employee stock ownership plan	(20,992)	(22,244)
Retained earnings	302,544	281,138
Accumulated other comprehensive loss	(9,147)	(5,451)
Treasury stock at cost; 11,298,034 and 12,129,822 shares at December 31, 2018 and 2017, respectively	(152,794)	(164,039)
Total stockholders’ equity	666,439	638,877
Total liabilities and stockholders’ equity	$ 4,408,432	$ 3,991,417

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
(estimated fair value of $9,249 at December 31, 2018, and $9,892 at December 31, 2017)	$ 9,249	$ 9,892
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)	60,933,707	60,933,707
Common stock, shares outstanding (shares)	49,635,673	48,803,885
Treasury stock, shares (shares)	11,298,034	12,129,822

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest income:
Loans	$ 127,591	$ 120,340	$ 111,776
Mortgage-backed securities	12,987	9,174	10,832
Other securities	4,112	1,310	908
FHLB of New York dividends	1,683	1,461	1,171
Deposits in other financial institutions	919	584	285
Total interest income	147,292	132,869	124,972
Interest expense:
Deposits	27,741	16,386	14,287
Borrowings	8,309	7,590	7,381
Total interest expense	36,050	23,976	21,668
Net interest income	111,242	108,893	103,304
Provision for loan losses	2,615	1,411	635
Net interest income after provision for loan losses	108,627	107,482	102,669
Non-interest income:
Fees and service charges for customer services	4,877	4,702	4,934
Income on bank owned life insurance	3,705	5,386	3,998
Losses/(gains) on securities, net	(701)	1,283	813
Other	246	271	327
Total non-interest income	8,127	11,642	10,072
Non-interest expense:
Compensation and employee benefits	34,802	38,237	39,780
Occupancy	12,096	11,270	11,411
Furniture and equipment	1,004	1,141	1,421
Data processing	5,011	4,585	6,054
Professional fees	3,482	2,774	3,461
Advertising	2,726	1,861	1,885
Federal Deposit Insurance Corporation (FDIC) insurance	1,065	1,064	1,494
Other	6,857	6,446	7,440
Total non-interest expense	67,043	67,378	72,946
Income before income tax expense	49,711	51,746	39,795
Income tax expense	9,632	26,978	13,665
Net income	$ 40,079	$ 24,768	$ 26,130
Net income per common share:
Basic (usd per share)	$ 0.87	$ 0.55	$ 0.59
Diluted (usd per share)	$ 0.85	$ 0.53	$ 0.57
Basic weighted average shares outstanding (in shares)	46,319,760	45,325,445	44,374,389
Diluted weighted average shares outstanding (in shares)	47,107,433	46,875,730	45,717,887
Net income	$ 40,079	$ 24,768	$ 26,130
Unrealized losses on securities:
Net unrealized holding losses on securities	(5,203)	(283)	(2,202)
Less: reclassification adjustment for net gains included in net income (included in losses (gains) on securities, net)	(178)	(169)	(306)
Net unrealized losses	(5,381)	(452)	(2,508)
Post-retirement benefits adjustment	240	74	244
Other comprehensive loss, before tax	(5,141)	(378)	(2,264)
Income tax benefit related to net unrealized holding losses on securities	1,462	113	894
Income tax expense related to reclassification adjustment for gains included in net income	50	68	122
Income tax expense related to post-retirement benefits adjustment	(67)	(30)	(98)
Other comprehensive loss, net of tax	(3,696)	(227)	(1,346)
Comprehensive income	$ 36,383	$ 24,541	$ 24,784

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, 2015	$ 559,779	$ 582	$ 501,540	$ (24,664)	$ 256,170	$ (2,986)	$ (170,863)
Beginning Balance, shares at Dec. 31, 2015		45,565,540
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	26,130				26,130
Other comprehensive loss, net of tax	(1,346)					(1,346)
Employee Stock Ownership Plan (ESOP) shares allocated or committed to be released	2,291		1,093	1,198
Stock compensation expense	7,264		7,264
Additional tax benefit on equity awards	1,512		1,512
Net issuance of restricted stock	0		(198)				198
Net issuance of restricted stock, shares		7,720
Exercise of stock options, net	120		(4,995)				5,115
Exercise of stock options, shares		383,233
Cash dividends declared	(14,074)				(14,074)
Treasury stock	(2,201)						(2,201)
Treasury stock, shares		(137,216)
Ending Balance at Dec. 31, 2016	621,196	$ 609	547,910	(23,466)	268,226	(4,332)	(167,751)
Ending Balance, shares at Dec. 31, 2016		48,526,658
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	24,768				24,768
Other comprehensive loss, net of tax	(227)					(227)
Acquisition of Hopewell Valley Community Bank	41,721	$ 27	41,694
Acquisition of Hopewell Valley Community Bank, shares		2,707,381
Employee Stock Ownership Plan (ESOP) shares allocated or committed to be released	2,489		1,267	1,222
Stock compensation expense	6,197		6,197
Net forfeitures of restricted stock	0		828				(828)
Net forfeitures of restricted stock, shares		(58,447)
Exercise of stock options, net	$ 100		(4,440)				4,540
Exercise of stock options, shares	558,743	335,674
Cash dividends declared	$ (15,646)				(15,646)
Reclassification of tax effects resulting from the adoption of ASU No. 2018-02 | Accounting Standards Update 2018-02					892
Ending Balance at Dec. 31, 2017	638,877	$ 609	548,864	(22,244)	281,138	(5,451)	(164,039)
Ending Balance, shares at Dec. 31, 2017		48,803,885
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principle - Adoption of ASU No. 2016-09 | Accounting Standards Update 2016-09	0		(2,898)		2,898
Net income	40,079				40,079
Other comprehensive loss, net of tax	(3,696)					(3,696)
Employee Stock Ownership Plan (ESOP) shares allocated or committed to be released	2,337		1,085	1,252
Stock compensation expense	5,432		5,432
Net issuance of restricted stock	0		(133)				133
Net issuance of restricted stock, shares		10,040
Exercise of stock options, net	$ 2,088		(9,029)				11,117
Exercise of stock options, shares	1,339,714	822,074
Cash dividends declared	$ (18,673)				(18,673)
Treasury stock	(5)						(5)
Treasury stock, shares		(326)
Reclassification of tax effects resulting from the adoption of ASU No. 2018-02 | Accounting Standards Update 2018-02	0				892	(892)
Ending Balance at Dec. 31, 2018	$ 666,439	$ 609	$ 546,219	$ (20,992)	$ 302,544	$ (9,147)	$ (152,794)
Ending Balance, shares at Dec. 31, 2018		49,635,673

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Dividends declared (usd per share)	$ 0.40	$ 0.34	$ 0.31
Average cost of treasury stock (usd per share)	$ 16.85		$ 16.04

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 40,079	$ 24,768	$ 26,130
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,615	1,411	635
ESOP and stock compensation expense	7,769	8,686	9,555
Depreciation expense	3,020	3,229	3,591
Amortization of premiums, and deferred loan costs, net of (accretion) of discounts, and deferred loan fees	2,441	2,000	2,226
Amortization of intangible assets	326	386	447
Income on bank owned life insurance	(3,705)	(5,386)	(3,998)
Proceeds from sale of loans held-for-sale	0	494	0
Losses (gains) on securities, net	701	(1,283)	(813)
Net purchases of trading securities	(250)	(626)	(637)
(Increase) decrease in accrued interest receivable	(2,246)	(999)	1
Decrease (increase) in other assets	3,563	(3,689)	3,052
Deferred taxes	(893)	15,193	(3,059)
(Decrease) increase in accrued expenses and other liabilities	(631)	(560)	571
Net cash provided by (used in) operating activities	52,789	43,624	37,701
Cash flows from investing activities:
Net increase in loans receivable	(69,270)	(110,177)	(87,514)
Purchase of loans	(37,593)	(64,116)	(167,345)
Purchase of FHLB of New York stock	(21,557)	(18,890)	(9,497)
Redemption of FHLB of New York stock	24,086	18,967	10,653
Purchases of debt securities available-for-sale	(451,174)	(137,631)	(105,860)
Principal payments and maturities on debt securities available-for-sale	118,485	114,416	162,594
Principal payments and maturities on debt securities held-to-maturity	403	200	181
Proceeds from sale of debt securities available-for-sale	32,115	4,975	44,582
Proceeds from sale of equity securities	0	966	0
Proceeds from bank owned life insurance	174	2,829	0
Proceeds from sale of other real estate owned	850	0	45
Purchases and improvements of premises and equipment	(2,879)	(2,065)	(932)
Net cash acquired in business combinations	0	0	55,479
Net cash provided by investing activities	(406,360)	(190,526)	(97,614)
Cash flows from financing activities:
Net increase in deposits	449,533	123,392	204,455
Dividends paid	(18,673)	(15,646)	(14,074)
Exercise of stock options	2,088	100	120
Purchase of treasury stock	(5)	0	(2,201)
Additional tax benefit on equity awards	0	0	1,512
Increase in advance payments by borrowers for taxes and insurance	3,209	2,467	1,469
Repayments under capital lease obligations	(255)	(224)	(204)
Proceeds from securities sold under agreements to repurchase and other borrowings	397,312	441,570	228,978
Repayments related to securities sold under agreements to repurchase and other borrowings	(459,715)	(443,003)	(315,910)
Net cash used in financing activities	373,494	108,656	104,145
Net (decrease) increase in cash and cash equivalents	19,923	(38,246)	44,232
Cash and cash equivalents at beginning of period	57,839	96,085	51,853
Cash and cash equivalents at end of period	77,762	57,839	96,085
Supplemental cash flow information:
Interest	35,822	23,765	22,037
Income taxes	10,368	12,875	14,415
Non-cash transactions:
Loans charged-off / (recoveries), net	1,278	(154)	810
Transfers of loans to other real estate owned	0	0	850
Transfers of originated loans held-for-investment to held-for-sale, at fair value	0	494	0
Securities available-for-sale	0	0	61,633
Loans	0	0	342,566
Accrued interest receivable	0	0	1,452
Bank owned life insurance	0	0	11,269
Premises and equipment	0	0	5,926
Federal Home Loan Bank of New York stock	0	0	476
Goodwill and other intangible assets	0	0	24,265
Other assets	0	0	5,389
Total non-cash assets acquired	0	0	452,976
Deposits	0	0	456,203
Borrowings	0	0	2,213
Other liabilities	0	0	8,318
Total non-cash liabilities assumed	0	0	466,734
Net non-cash assets acquired	0	0	(13,758)
Net cash and cash equivalents acquired	0	0	55,479
Common stock issued in acquisition	$ 0	$ 0	$ 41,721

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
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) 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 purchased credit-impaired (“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 uncertain matters. Actual results may differ from the estimates and assumptions. Certain prior year amounts have been reclassified to conform to the current year presentation. (b) 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. (c) 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. (d) Securities Securities are classified at the time of purchase, based on management’s intention, as debt securities held-to-maturity, debt securities available-for-sale, trading account securities or equity securities. Debt securities held-to-maturity are those that management has the positive intent and ability to hold until maturity. Debt 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. Debt securities available-for-sale represents all securities not classified as either held-to-maturity, trading, or equity. Debt 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, using quoted prices in active markets, with unrealized holding gains and losses reported as a component of gain (loss) on securities, net in non-interest income. Equity securities with readily determinable fair values are stated at fair value with unrealized gains and losses reported as a component of gain (loss) on securities, net in non-interest income. Equity securities without readily determinable fair values are recorded at net asset value less any impairment, if any. Beginning January 1, 2018, upon adoption of Accounting Standards Update (“ASU”) No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, the Company reclassified its equity securities out of available-for-sale securities to equity securities on the consolidated balance sheets for all periods presented. 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. (e) Loans The accounting and reporting for PCI loans and loans classified as 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 fair value of the underlying collateral (less estimated costs to sell) if the loan is collateral dependent. Impairments, if any, are recognized through a charge to the allowance 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. 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. (f) 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 0.125% 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, 2018 and 2017 . (g) 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. (h) 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. (i) 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. For the year ended December 31, 2018 , we elected to perform step one of the two-step goodwill impairment test for our reporting unit. 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, 2018 , the carrying value of goodwill totaled $38.4 million . The Company performed its annual goodwill impairment test, as of December 31, 2018 , 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. (j) 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. (k) 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. (l) 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. (m) Comprehensive Income (Loss) Comprehensive income (loss) includes net income and the change in unrealized holding gains and losses on debt 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) and its components is presented in the Consolidated Statements of Comprehensive Income. (n) 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 (the “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. 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 Company accounts for forfeitures as they occur. The Bank has a 401(k) plan covering substantially all employees. Contributions to the plan are expensed as incurred. (o) 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. (p) 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. In March 2016, the FASB issued ASU No. 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, a new standard that simplifies certain aspects of accounting for share-based payments. The Company adopted ASU No. 2016-09 effective January 1, 2017. The update amended the diluted earnings per share calculation in that excess tax benefits are no longer included in assumed proceeds when determining average diluted shares outstanding under the treasury stock method. This guidance was applied prospectively upon adoption. When applying the treasury stock method for the years ended December 31, 2018 and 2017, we added the assumed proceeds from option exercises and the average unamortized compensation costs related to unvested shares of restricted stock and stock options. We then divided 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. For the year ended December 31, 2016, we added (1) the assumed proceeds from option exercises; (2) the tax benefit that would have been 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 divided 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, 2018 , 2017 , and 2016 , there were 787,673 , 1,550,285 , and 1,343,498 dilutive shares outstanding, respectively. (q) 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. (r) Advertising costs Advertising costs are expensed in the period they are incurred. (s) Recent Accounting Developments Accounting Pronouncements Adopted in 2018 ASU No. 2014-09. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) . The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies generally will be required to use more judgment and make more estimates than under current guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. Subsequent to the issuance of ASU No. 2014-09, the FASB issued targeted updates to clarify specific implementation issues including ASU No. 2016-08, “Principal versus Agent Considerations (Reporting Revenue Gross versus Net),” ASU No. 2016-10, “Identifying Performance Obligations and Licensing,” ASU No. 2016-12, “Narrow-Scope Improvements and Practical Expedients,” and ASU No. 2016-20 “Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers.” The new standard was effective for the Company on January 1, 2018. The adoption of ASU No. 2014-09 did not have a material impact on the Company’s consolidated financial statements and related disclosures as the Company’s primary sources of revenues are derived from interest income on financial assets that are not within the scope of the guidance. Management conducted an assessment of the revenue streams that were potentially affected by the guidance and reviewed contracts in scope to ensure compliance with the guidance. These contracts included those related to service charges on deposit accounts, ATM and card interchange fees, and investment services fees. The Company’s revenue recognition pattern for these revenue streams did not change from current practice. Additional disclosures required by the standard have been included in Note 19. “Revenue Recognition.” ASU No. 2016-01. In January 2016, the FASB issued 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 including the following: 1) Requires equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; 2) Simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; 3) Requires public business entities to use the exit price notion when measuring the fair value of financial i

Business Combination

Business Combination	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Business Combination	Business Combination On January 8, 2016 , the Company completed its acquisition of Hopewell Valley Community Bank (“Hopewell Valley”), which, after purchase accounting adjustments, added $508.5 million to total assets, $342.6 million to loans, and $456.2 million to deposits, and nine branch offices in the Hunterdon and Mercer counties of New Jersey. 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 . The transaction was accounted for under the acquisition method of accounting. Under this method of accounting, the purchase price has been allocated to the respective assets acquired and liabilities assumed based upon their estimated fair values, net of tax. The excess of consideration paid over the fair value of the net assets acquired has been recorded as goodwill. The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of acquisition for Hopewell Valley (in thousands): ASSETS ACQUIRED: January 8, 2016 Cash and cash equivalents, net $ 55,479 Securities available for sale 61,633 Loans 342,566 Accrued interest receivable 1,452 Bank-owned life insurance 11,269 Premises and equipment 5,926 Federal Home Loan Bank of New York stock, at cost 476 Goodwill 22,252 Other intangible assets 2,013 Other assets 5,389 Total assets acquired $ 508,455 LIABILITIES ASSUMED: Deposits $ 456,203 Other borrowings 2,213 Other liabilities 8,318 Total liabilities assumed $ 466,734 Net assets acquired $ 41,721 Fair Value Measurement of Assets Assumed and Liabilities Assumed The methods used to determine the fair value of the assets acquired and liabilities assumed in the Hopewell Valley acquisition were as follows: Cash and Cash Equivalents The estimated fair values of cash and cash equivalents approximate their stated face amounts, as these financial instruments are either due on demand or have short-term maturities. Securities Available-for-Sale The estimated fair values of the investment securities classified as available-for-sale were calculated utilizing Level 1 and Level 2 inputs. Management reviewed the data and assumptions used by its third party provider in pricing the securities to ensure the highest level of significant inputs is derived from observable market data. These prices were validated against other pricing sources and broker-dealer indications. Loans The acquired loan portfolio was valued based on current guidance which defines fair value as the price that would be received to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. Level 3 inputs were utilized to value the portfolio and included the use of present value techniques employing cash flow estimates and the incorporated assumptions that marketplace participants would use in estimating fair values. In instances where reliable market information was not available, the Company used its own assumptions in an effort to determine reasonable fair value. Specifically, management utilized three separate fair value analyses which a market participant would employ in estimating the total fair value adjustment. The three separate fair valuation methodologies used were: 1) interest rate loan fair value analysis; 2) general credit fair value adjustment; and 3) specific credit fair value adjustment. To prepare the interest rate fair value analysis, loans were grouped by characteristics such as loan type, term, collateral and rate. Market rates for similar loans were obtained from various external data sources and reviewed by Company management for reasonableness. The average of these rates was used as the fair value interest rate a market participant would utilize. A present value approach was utilized to calculate the interest rate fair value adjustment. The general credit fair value adjustment was calculated using a two part general credit fair value analysis: 1) expected lifetime losses; and 2) estimated fair value adjustment for qualitative factors. The expected lifetime losses were calculated using an average of historical losses of the Company, the acquired bank and peer banks. The adjustment related to qualitative factors was impacted by general economic conditions and the risk related to lack of familiarity with the originator's underwriting process. To calculate the specific credit fair value adjustment, management reviewed the acquired loan portfolio for loans meeting the definition of an impaired loan with deteriorated credit quality. Loans meeting this definition were reviewed by comparing the contractual cash flows to expected collectible cash flows. The aggregate expected cash flows less the acquisition date fair value resulted in an accretable yield amount. The accretable yield amount will be recognized over the life of the loans on a level yield basis as an adjustment to yield. Other Intangible Assets Other intangible assets consisting of core deposit premium represents the value assigned to demand, interest checking, money market and savings accounts acquired as part of an acquisition. The core deposit premium value represents the future economic benefit, including the present value of future tax benefits, of the potential cost savings from acquiring core deposits as part of an acquisition compared to the cost of alternative funding sources. The core deposit premium is being amortized over an estimated useful life of 10 years to approximate the existing deposit relationships acquired. Deposits The fair values of deposit liabilities with no stated maturity (i.e., non-interest bearing demand accounts, interest-bearing negotiable orders of withdrawal (NOW), savings and money market accounts) are equal to the carrying amounts payable on demand. The fair values of certificates of deposit represent contractual cash flows, discounted to present value using interest rates currently offered on deposits with similar characteristics and remaining maturities. Other Borrowings Other borrowings consist of securities sold under agreements to repurchase. The carrying amounts approximate their fair values because they frequently re-price to a market rate.

Debt Securities Available-for-S

Debt Securities Available-for-Sale	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Debt Securities Available-for-Sale	Debt Securities Available-for-Sale The following is a comparative summary of mortgage-backed securities and other debt securities available-for-sale at December 31, 2018 and 2017 (in thousands): 2018 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises (GSE) $ 317,530 $ 800 $ 3,542 $ 314,788 Real estate mortgage investment conduits (REMICs): GSE 258,050 92 7,979 250,163 Non-GSE 59 — 1 58 575,639 892 11,522 565,009 Other debt securities: Municipal bonds 270 3 — 273 Corporate bonds 244,892 72 2,215 242,749 245,162 75 2,215 243,022 Total debt securities available-for-sale $ 820,801 $ 967 $ 13,737 $ 808,031 2017 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: GSE $ 179,320 $ 1,429 $ 2,454 $ 178,295 REMICs: GSE 273,501 287 6,859 266,929 Non-GSE 80 — 1 79 452,901 1,716 9,314 445,303 Other debt securities: Municipal bonds 343 6 — 349 Corporate bonds 67,927 401 198 68,130 68,270 407 198 68,479 Total debt securities available-for-sale $ 521,171 $ 2,123 $ 9,512 $ 513,782 The following is a summary of the expected maturity distribution of debt securities available-for-sale other than mortgage-backed securities at December 31, 2018 (in thousands): Available-for-sale Amortized cost Estimated fair value Due in one year or less $ 33,073 $ 33,007 Due after one year through five years 202,193 200,430 Due after five years through ten years 9,896 9,585 $ 245,162 $ 243,022 Contractual maturities for mortgage-backed securities are not included above, as expected maturities on mortgage-backed securities may 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, 2018 , and December 31, 2017 , debt securities available-for-sale with a carrying value of $492.4 million and $371.1 million , respectively, were pledged to secure repurchase agreements and deposits. See Note 9 for further discussion regarding securities pledged or encumbered for borrowings. For the year ended December 31, 2018 , the Company had gross proceeds of $32.1 million on sales of securities available-for-sale with gross realized gains of $183,000 and gross realized losses of $5,000 . For the year ended December 31, 2017 , the Company had gross proceeds of $5.0 million on sales of securities available-for-sale with gross realized gains of $173,000 and gross realized losses of $4,000 . For the year ended December 31, 2016 , the Company had gross proceeds of $44.6 million on sales of securities available-for-sale with gross realized gains of $493,000 and gross realized losses of $187,000 . The Company recognized net losses of $879,000 on its trading securities portfolio during the year ended December 31, 2018 , and net gains of $1.1 million , and $507,000 and on its trading securities portfolio during the years ended 2017 and 2016 , 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, 2018 , 2017 and 2016 . Gross unrealized losses on mortgage-backed securities and other debt securities 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, 2018 and 2017 , were as follows (in thousands): December 31, 2018 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 $ 404 $ 82,781 $ 3,138 $ 100,109 $ 3,542 $ 182,890 REMICs: GSE 269 46,921 7,710 181,512 7,979 228,433 Non-GSE — — 1 58 1 58 Other debt securities: Corporate bonds 1,703 173,219 512 25,675 2,215 198,894 Total $ 2,376 $ 302,921 $ 11,361 $ 307,354 $ 13,737 $ 610,275 December 31, 2017 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 $ 439 $ 48,931 $ 2,015 $ 76,113 $ 2,454 $ 125,044 REMICs: GSE 933 103,644 5,926 139,830 6,859 243,474 Non-GSE — — 1 79 1 79 Other debt securities: Corporate bonds 61 11,006 137 15,084 198 26,090 Total $ 1,433 $ 163,581 $ 8,079 $ 231,106 $ 9,512 $ 394,687 The Company held 49 pass-through mortgage-backed securities issued or guaranteed by GSEs, 47 REMIC mortgage-backed securities issued or guaranteed by GSEs, one REMIC mortgage-backed security not issued or guaranteed by GSEs, and five corporate bonds that were in a continuous unrealized loss position of greater than twelve months at December 31, 2018 . There were 25 pass-through mortgage-backed securities issued or guaranteed by GSEs, 8 REMIC mortgage-backed securities issued or guaranteed by GSEs, and 30 corporate bonds that were in an unrealized loss position of less than twelve months. All securities referred to above, other than the one REMIC mortgage-backed security not issued or guaranteed by a GSE, were rated investment grade at December 31, 2018 . The declines in fair 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. Equity Securities At both December 31, 2018 and December 31, 2017 , equity securities totaled $1.3 million . Equity securities consist of money market mutual funds, recorded at fair value of $237,000 and $323,000 , at December 31, 2018 and December 31, 2017 , respectively, and an investment in a private Small Business Administration (“SBA”) Loan Fund recorded at net asset value of $1.0 million at both December 31, 2018 , and December 31, 2017 . As the SBA Loan Fund operates as a private fund, its shares are not publicly traded and therefore have no readily determinable market value. The investment in the fund is recorded at net asset value as a practical expedient for reporting fair market value. Upon adoption of ASU No. 2016-01 on January 1, 2018, the Company reclassified its equity securities out of available-for-sale securities to equity securities on the consolidated balance sheets for all periods presented. For further details on ASU No. 2016-01 see Note 1 (r) - “Recent Accounting Developments.”

Debt Securities Held-to-Maturit

Debt Securities Held-to-Maturity	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Debt Securities Held-to-Maturity	Debt Securities Held-to-Maturity The following is a summary of mortgage-backed securities held-to-maturity at December 31, 2018 and 2017 (in thousands): 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 9,505 $ — $ 256 $ 9,249 Total securities held-to-maturity $ 9,505 $ — $ 256 $ 9,249 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 9,931 $ 17 $ 56 $ 9,892 Total securities held-to-maturity $ 9,931 $ 17 $ 56 $ 9,892 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. There were no sales of held-to-maturity securities for the years ended December 31, 2018 , 2017 and 2016 . The Company did no t recognize any other-than-temporary impairment charges in earnings on securities held-to-maturity during the years ended December 31, 2018 , 2017 and 2016 . At December 31, 2018 , and December 31, 2017 , securities held-to-maturity with a carrying value of $6.5 million and $9.9 million , respectively, were pledged to secure repurchase agreements and deposits. Gross unrealized losses on mortgage-backed securities held-to-maturity, 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, 2018 and 2017 , were as follows (in thousands): December 31, 2018 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: GSEs $ 34 $ 2,133 $ 222 $ 7,116 $ 256 $ 9,249 Total $ 34 $ 2,133 $ 222 $ 7,116 $ 256 $ 9,249 December 31, 2017 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: GSEs $ 7 $ 3,922 $ 49 $ 3,735 $ 56 $ 7,657 Total $ 7 $ 3,922 $ 49 $ 3,735 $ 56 $ 7,657 The Company held five pass-through mortgage-backed debt securities held-to-maturity, issued or guaranteed by GSEs, that were in a continuous unrealized loss position of greater than twelve months, and one pass-through mortgage-backed securities held-to-maturity, issued or guaranteed by GSEs, that were in a continuous unrealized loss position of less than twelve months at December 31, 2018. Management evaluated these securities and concluded that 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.

Equity Securities

Equity Securities	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Equity Securities	Debt Securities Available-for-Sale The following is a comparative summary of mortgage-backed securities and other debt securities available-for-sale at December 31, 2018 and 2017 (in thousands): 2018 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises (GSE) $ 317,530 $ 800 $ 3,542 $ 314,788 Real estate mortgage investment conduits (REMICs): GSE 258,050 92 7,979 250,163 Non-GSE 59 — 1 58 575,639 892 11,522 565,009 Other debt securities: Municipal bonds 270 3 — 273 Corporate bonds 244,892 72 2,215 242,749 245,162 75 2,215 243,022 Total debt securities available-for-sale $ 820,801 $ 967 $ 13,737 $ 808,031 2017 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: GSE $ 179,320 $ 1,429 $ 2,454 $ 178,295 REMICs: GSE 273,501 287 6,859 266,929 Non-GSE 80 — 1 79 452,901 1,716 9,314 445,303 Other debt securities: Municipal bonds 343 6 — 349 Corporate bonds 67,927 401 198 68,130 68,270 407 198 68,479 Total debt securities available-for-sale $ 521,171 $ 2,123 $ 9,512 $ 513,782 The following is a summary of the expected maturity distribution of debt securities available-for-sale other than mortgage-backed securities at December 31, 2018 (in thousands): Available-for-sale Amortized cost Estimated fair value Due in one year or less $ 33,073 $ 33,007 Due after one year through five years 202,193 200,430 Due after five years through ten years 9,896 9,585 $ 245,162 $ 243,022 Contractual maturities for mortgage-backed securities are not included above, as expected maturities on mortgage-backed securities may 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, 2018 , and December 31, 2017 , debt securities available-for-sale with a carrying value of $492.4 million and $371.1 million , respectively, were pledged to secure repurchase agreements and deposits. See Note 9 for further discussion regarding securities pledged or encumbered for borrowings. For the year ended December 31, 2018 , the Company had gross proceeds of $32.1 million on sales of securities available-for-sale with gross realized gains of $183,000 and gross realized losses of $5,000 . For the year ended December 31, 2017 , the Company had gross proceeds of $5.0 million on sales of securities available-for-sale with gross realized gains of $173,000 and gross realized losses of $4,000 . For the year ended December 31, 2016 , the Company had gross proceeds of $44.6 million on sales of securities available-for-sale with gross realized gains of $493,000 and gross realized losses of $187,000 . The Company recognized net losses of $879,000 on its trading securities portfolio during the year ended December 31, 2018 , and net gains of $1.1 million , and $507,000 and on its trading securities portfolio during the years ended 2017 and 2016 , 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, 2018 , 2017 and 2016 . Gross unrealized losses on mortgage-backed securities and other debt securities 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, 2018 and 2017 , were as follows (in thousands): December 31, 2018 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 $ 404 $ 82,781 $ 3,138 $ 100,109 $ 3,542 $ 182,890 REMICs: GSE 269 46,921 7,710 181,512 7,979 228,433 Non-GSE — — 1 58 1 58 Other debt securities: Corporate bonds 1,703 173,219 512 25,675 2,215 198,894 Total $ 2,376 $ 302,921 $ 11,361 $ 307,354 $ 13,737 $ 610,275 December 31, 2017 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 $ 439 $ 48,931 $ 2,015 $ 76,113 $ 2,454 $ 125,044 REMICs: GSE 933 103,644 5,926 139,830 6,859 243,474 Non-GSE — — 1 79 1 79 Other debt securities: Corporate bonds 61 11,006 137 15,084 198 26,090 Total $ 1,433 $ 163,581 $ 8,079 $ 231,106 $ 9,512 $ 394,687 The Company held 49 pass-through mortgage-backed securities issued or guaranteed by GSEs, 47 REMIC mortgage-backed securities issued or guaranteed by GSEs, one REMIC mortgage-backed security not issued or guaranteed by GSEs, and five corporate bonds that were in a continuous unrealized loss position of greater than twelve months at December 31, 2018 . There were 25 pass-through mortgage-backed securities issued or guaranteed by GSEs, 8 REMIC mortgage-backed securities issued or guaranteed by GSEs, and 30 corporate bonds that were in an unrealized loss position of less than twelve months. All securities referred to above, other than the one REMIC mortgage-backed security not issued or guaranteed by a GSE, were rated investment grade at December 31, 2018 . The declines in fair 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. Equity Securities At both December 31, 2018 and December 31, 2017 , equity securities totaled $1.3 million . Equity securities consist of money market mutual funds, recorded at fair value of $237,000 and $323,000 , at December 31, 2018 and December 31, 2017 , respectively, and an investment in a private Small Business Administration (“SBA”) Loan Fund recorded at net asset value of $1.0 million at both December 31, 2018 , and December 31, 2017 . As the SBA Loan Fund operates as a private fund, its shares are not publicly traded and therefore have no readily determinable market value. The investment in the fund is recorded at net asset value as a practical expedient for reporting fair market value. Upon adoption of ASU No. 2016-01 on January 1, 2018, the Company reclassified its equity securities out of available-for-sale securities to equity securities on the consolidated balance sheets for all periods presented. For further details on ASU No. 2016-01 see Note 1 (r) - “Recent Accounting Developments.”

Loans

Loans	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Loans	Loans Loans held-for-investment, net, consists of the following (in thousands): December 31, 2018 2017 Originated loans: Real estate loans: Multifamily $ 1,930,535 $ 1,735,712 Commercial mortgage 499,311 445,225 One-to-four family residential mortgage 91,371 100,942 Home equity and lines of credit 78,593 66,254 Construction and land 26,552 34,545 Total real estate loans 2,626,362 2,382,678 Commercial and industrial loans 44,104 34,828 Other loans 1,519 1,430 Total commercial and industrial and other loans 45,623 36,258 Deferred loan cost, net 6,892 6,339 Originated loans held-for-investment, net 2,678,877 2,425,275 PCI Loans 20,143 22,741 Loans acquired: One-to-four family residential mortgage 225,877 275,053 Multifamily 145,485 199,149 Commercial mortgage 133,263 163,962 Home equity and lines of credit 17,583 20,455 Construction and land 12,003 17,201 Total acquired real estate loans 534,211 675,820 Commercial and industrial loans 11,933 16,946 Other loans 6 37 Total loans acquired 546,150 692,803 Loans held for investment, net 3,245,170 3,140,819 Allowance for loan losses (27,497 ) (26,160 ) Net loans held-for-investment $ 3,217,673 $ 3,114,659 The Company had no loans held-for-sale at December 31, 2018 , or December 31, 2017 . PCI loans totaled $20.1 million at December 31, 2018 , as compared to $ 22.7 million at December 31, 2017 . The majority of the PCI loan balance is attributable to those loans acquired as part of an FDIC-assisted transaction. The Company accounts for PCI loans utilizing U.S. GAAP applicable to loans acquired with deteriorated credit quality. At both December 31, 2018 and December 31, 2017 , PCI loans consisted of approximately 27% commercial real estate loans and 50% commercial and industrial loans, with the remaining balance in residential and home equity loans. The following table sets forth information regarding the estimates of the contractually required payments, the cash flows expected to be collected, and the estimated fair value of the PCI loans acquired from Hopewell Valley at January 8, 2016 (in thousands): January 8, 2016 Contractually required principal and interest at acquisition $ 16,580 Contractual cash flows not expected to be collected (non-accretable discount) (9,929 ) Expected cash flows to be collected at acquisition 6,651 Interest component of expected cash flows (accretable discount) (845 ) Fair value of acquired loans $ 5,806 The following details the accretable yield (in thousands): For The Year Ended December 31, 2018 2017 Balance at the beginning of year $ 24,502 $ 24,215 Accretion into interest income (4,176 ) (5,477 ) Net reclassification from non-accretable difference (1) 1,520 5,764 Balance at end of year $ 21,846 $ 24,502 (1) Reclassifications of the non-accretable difference to the accretable yield may occur subsequent to the loan acquisition dates due to increases in expected cash flows of the loans. 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, 2018 and 2017 , 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 and discounts for quick sales,) 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 non-accrual 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. The evaluation for loan losses 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. 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 incurred losses. Conversely, when the loan portfolio decreases, absent other factors, our allowance for loan loss methodology results in a lower dollar amount of estimated incurred 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, 2018 , 2017 , and 2016 follows (in thousands): December 31, 2018 2017 2016 Balance at beginning of year $ 26,160 $ 24,595 $ 24,770 Provision for loan losses 2,615 1,411 635 Recoveries 112 556 194 Charge-offs (1,390 ) (402 ) (1,004 ) Balance at end of year $ 27,497 $ 26,160 $ 24,595 The following table sets forth activity in our allowance for loan losses, by loan type, for the years ended December 31, 2018 and 2017 . 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, 2018 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 $ 5,196 $ 503 $ 610 $ 17,374 $ 122 $ 1,273 $ 94 $ — $ 25,172 $ 951 $ 37 $ 26,160 Charge-offs (1,256 ) (3 ) — — (60 ) (70 ) — — (1,389 ) — (1 ) (1,390 ) Recoveries 49 4 — 26 — 20 — — 99 — 13 112 Provisions (credit) 1,641 (162 ) (147 ) 684 229 346 14 — 2,605 59 (49 ) 2,615 Ending Balance $ 5,630 $ 342 $ 463 $ 18,084 $ 291 $ 1,569 $ 108 $ — $ 26,487 $ 1,010 $ — $ 27,497 Ending balance: individually evaluated for impairment $ — $ 18 $ — $ — $ 5 $ 3 $ — $ — $ 26 $ — $ — $ 26 Ending balance: collectively evaluated for impairment $ 5,630 $ 324 $ 463 $ 18,084 $ 286 $ 1,566 $ 108 $ — $ 26,461 $ 1,010 $ — $ 27,471 Loans, net: Ending Balance $ 499,860 $ 92,433 $ 26,613 $ 1,933,946 $ 80,315 $ 44,190 $ 1,520 $ — $ 2,678,877 $ 20,143 $ 546,150 $ 3,245,170 Ending balance: individually evaluated for impairment $ 15,252 $ 1,893 $ — $ 1,268 $ 61 $ 73 $ — $ — $ 18,547 $ — $ 3,782 $ 22,329 Ending balance: collectively evaluated for impairment $ 484,608 $ 90,540 $ 26,613 $ 1,932,678 $ 80,254 $ 44,117 $ 1,520 $ — $ 2,660,330 $ 20,143 $ 542,368 $ 3,222,841 December 31, 2017 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 $ 5,432 $ 664 $ 172 $ 14,952 $ 588 $ 1,720 $ 96 $ — $ 23,624 $ 896 $ 75 $ 24,595 Charge-offs (4 ) — — (184 ) (104 ) (73 ) — — (365 ) — (37 ) (402 ) Recoveries 70 — — 277 97 79 — — 523 — 33 556 Provisions (credit) (302 ) (161 ) 438 2,329 (459 ) (453 ) (2 ) — 1,390 55 (34 ) 1,411 Ending Balance $ 5,196 $ 503 $ 610 $ 17,374 $ 122 $ 1,273 $ 94 $ — $ 25,172 $ 951 $ 37 $ 26,160 Ending balance: individually evaluated for impairment $ — $ 38 $ — $ — $ 4 $ 3 $ — $ — $ 45 $ — $ 37 $ 82 Ending balance: collectively evaluated for impairment $ 5,196 $ 465 $ 610 $ 17,374 $ 118 $ 1,270 $ 94 $ — $ 25,127 $ 951 $ — $ 26,078 Loans, net: Ending Balance $ 445,781 $ 101,650 $ 34,620 $ 1,739,220 $ 67,679 $ 34,893 $ 1,432 $ — $ 2,425,275 $ 22,741 $ 692,803 $ 3,140,819 Ending balance: individually evaluated for impairment $ 16,008 $ 1,996 $ — $ 1,310 $ 69 $ 159 $ — $ — $ 19,542 $ — $ 1,543 $ 21,085 Ending balance: collectively evaluated for impairment $ 429,773 $ 99,654 $ 34,620 $ 1,737,910 $ 67,610 $ 34,734 $ 1,432 $ — $ 2,405,733 $ 22,741 $ 691,260 $ 3,119,734 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, 2018 and 2017 (in thousands): At December 31, 2018 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 $ 170,832 $ 1,756,882 $ 78,917 $ 409,155 $ 54,912 $ 34,808 $ 26,613 $ 80,077 $ 43,640 $ 1,520 $ 2,657,356 Special Mention — 613 395 1,137 747 — — 27 430 — 3,349 Substandard — 5,619 — 10,256 1,406 560 — 211 120 — 18,172 Originated loans held-for-investment, net $ 170,832 $ 1,763,114 $ 79,312 $ 420,548 $ 57,065 $ 35,368 $ 26,613 $ 80,315 $ 44,190 $ 1,520 $ 2,678,877 At December 31, 2017 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 $ 131,792 $ 1,603,947 $ 84,620 $ 346,857 $ 60,400 $ 38,504 $ 34,620 $ 67,426 $ 34,141 $ 1,432 $ 2,403,739 Special Mention — 1,897 410 2,170 683 — — 28 571 — 5,759 Substandard — 1,584 — 11,724 1,470 593 — 225 181 — 15,777 Originated loans held-for-investment, net $ 131,792 $ 1,607,428 $ 85,030 $ 360,751 $ 62,553 $ 39,097 $ 34,620 $ 67,679 $ 34,893 $ 1,432 $ 2,425,275 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 non-accrual loans was $9.2 million and $5.5 million at December 31, 2018 , and December 31, 2017 , 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 $5.9 million and $3.1 million at December 31, 2018 , and December 31, 2017 , 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 $3.2 million at December 31, 2018 , and $2.4 million at December 31, 2017 . There was no loans held-for-sale at December 31, 2018 , or December 31, 2017 . Loans past due 90 days or more and still accruing interest were $33,000 and $28,000 at December 31, 2018 , and December 31, 2017 , 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, 2018 and 2017 (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, 2018 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 $ — $ 287 $ 2,588 $ 2,875 $ — $ 2,875 Total commercial — 287 2,588 2,875 — 2,875 One-to-four family residential LTV < 60% Substandard — 432 77 509 — 509 LTV => 60% Substandard — 32 — 32 — 32 Total one-to-four family residential — 464 77 541 — 541 Home equity and lines of credit Substandard 75 — — 75 — 75 Total home equity and lines of credit 75 — — 75 — 75 Commercial and industrial loans Substandard — — 25 25 — 25 Total commercial and industrial loans — — 25 25 — 25 Total non-performing loans held-for-investment, originated 75 751 2,690 3,516 — 3,516 Loans acquired: Real Estate Loans: Commercial LTV < 35% Substandard 87 — 194 281 — 281 LTV => 35% Substandard — 764 3,371 4,135 — 4,135 Total commercial 87 764 3,565 4,416 — 4,416 One-to-four family residential LTV < 60% Substandard — 199 169 368 6 374 LTV => 60% Substandard 126 — 93 219 27 246 Total one-to-four family residential 126 199 262 587 33 620 Multifamily LTV < 35% Substandard 152 — — 152 — 152 LTV => 35% Substandard — 414 — 414 — 414 Total multifamily 152 414 — 566 — 566 Home equity and lines of credit Substandard — — 77 77 — 77 Total home equity and lines of credit — — 77 77 — 77 Total non-performing loans acquired 365 1,377 3,904 5,646 33 5,679 Total non-performing loans $ 440 $ 2,128 $ 6,594 $ 9,162 $ 33 $ 9,195 At December 31, 2017 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 $ 432 $ 314 $ 2,305 $ 3,051 $ — $ 3,051 Total commercial 432 314 2,305 3,051 — 3,051 One-to-four family residential LTV < 60% Substandard — 206 328 534 — 534 LTV => 60% Substandard — — 39 39 — 39 Total one-to-four family residential — 206 367 573 — 573 Home equity and lines of credit Substandard 79 — — 79 — 79 Total home equity and lines of credit 79 — — 79 — 79 Commercial and industrial loans Substandard — — 72 72 — 72 Total commercial and industrial loans — — 72 72 — 72 Total non-performing loans held-for-investment, originated 511 520 2,744 3,775 — 3,775 Loans acquired: Real estate loans: Commercial LTV < 35% Substandard — — 205 205 — 205 LTV => 35% Substandard — 773 58 831 — 831 Total commercial — 773 263 1,036 — 1,036 One-to-four family residential LTV < 60% Substandard — 201 — 201 27 228 Total one-to-four family residential — 201 — 201 27 228 Multifamily LTV =>35% Substandard — 417 — 417 — 417 Total multifamily — 417 — 417 — 417 Home equity and lines of credit Substandard — 28 49 77 — 77 Total home equity and lines of credit — 28 49 77 — 77 Commercial and industrial Substandard — — 2 2 — 2 Total commercial and industrial loans — — 2 2 — 2 Other Pass — — — — 1 1 Total other — — — — 1 1 Total non-performing loans acquired — 1,419 314 1,733 28 1,761 Total non-performing loans $ 511 $ 1,939 $ 3,058 $ 5,508 $ 28 $ 5,536 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, 2018 and 2017 (in thousands): December 31, 2018 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 $ 78,699 $ 218 $ 78,917 $ — $ 78,917 Special Mention — 395 395 — 395 Total 78,699 613 79,312 — 79,312 LTV => 35% Pass 408,830 325 409,155 — 409,155 Special Mention 1,137 — 1,137 — 1,137 Substandard 7,381 — 7,381 2,875 10,256 Total 417,348 325 417,673 2,875 420,548 Total commercial 496,047 938 496,985 2,875 499,860 One-to-four family residential LTV < 60% Pass 54,576 336 54,912 — 54,912 Special Mention — 747 747 — 747 Substandard 896 — 896 510 1,406 Total 55,472 1,083 56,555 510 57,065 LTV => 60% Pass 34,576 232 34,808 — 34,808 Substandard 528 — 528 32 560 Total 35,104 232 35,336 32 35,368 Total one-to-four family residential 90,576 1,315 91,891 542 92,433 Construction and land Pass 26,613 — 26,613 — 26,613 Total construction and land 26,613 — 26,613 — 26,613 Multifamily LTV < 35% Pass 170,534 298 170,832 — 170,832 Total 170,534 298 170,832 — 170,832 LTV= > 35% Pass 1,756,443 439 1,756,882 — 1,756,882 Special Mention 613 — 613 — 613 Substandard 4,390 1,229 5,619 — 5,619 Total 1,761,446 1,668 1,763,114 — 1,763,114 Total multifamily 1,931,980 1,966 1,933,946 — 1,933,946 Home equity and lines of credit Pass 80,077 — 80,077 — 80,077 Special Mention 27 — 27 — 27 Substandard 137 — 137 74 211 Total home equity and lines of credit 80,241 — 80,241 74 80,315 Commercial and industrial loans Pass 43,640 — 43,640 — 43,640 Special Mention 430 — 430 — 430 Substandard 95 — 95 25 120 Total commercial and industrial loans 44,165 — 44,165 25 44,190 Other loans Pass 1,518 2 1,520 — 1,520 Total other loans 1,518 2 1,520 — 1,520 December 31, 2018 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Total originated loans held-for-investment 2,671,140 4,221 2,675,361 3,516 2,678,877 Acquired loans: One-to-four family residential LTV < 60% Pass 202,471 2,799 205,270 — 205,270 Special Mention 415 — 415 — 415 Substandard 62 6 68 374 442 Total 202,948 2,805 205,753 374 206,127 LTV => 60% Pass 19,504 — 19,504 — 19,504 Substandard — — — 246 246 Total 19,504 — 19,504 246 19,750 Total one-to-four family residential 222,452 2,805 225,257 620 225,877 Commercial LTV < 35% Pass 41,071 — 41,071 — 41,071 Special Mention 1,079 — 1,079 — 1,079 Substandard 1,185 151 1,336 281 1,617 Total 43,335 151 43,486 281 43,767 LTV => 35% Pass 73,986 749 74,735 — 74,735 Special Mention 4,315 128 4,443 — 4,443 Substandard 5,772 411 6,183 4,135 10,318 Total 84,073 1,288 85,361 4,135 89,496 Total commercial 127,408 1,439 128,847 4,416 133,263 Construction and land Pass 12,003 — 12,003 — 12,003 Total construction and land 12,003 — 12,003 — 12,003 Multifamily LTV < 35% Pass 137,141 — 137,141 — 137,141 Special Mention — 52 52 — 52 Substandard — — — 152 152 Total 137,141 52 137,193 152 137,345 LTV => 35% Pass 7,726 — 7,726 — 7,726 Substandard — — — 414 414 Total 7,726 — 7,726 414 8,140 Total multifamily 144,867 52 144,919 566 145,485 Home equity and lines of credit Pass 17,427 — 17,427 — 17,427 Substandard 79 — 79 77 156 Total home equity and lines of credit 17,506 — 17,506 77 17,583 Commercial and industrial Pass 11,888 45 11,933 — 11,933 Total commercial and industrial 11,888 45 11,933 — 11,933 Other 6 — 6 — 6 Total loans acquired 536,130 4,341 540,471 5,679 546,150 $ 3,207,270 $ 8,562 $ 3,215,832 $ 9,195 $ 3,225,027 December 31, 2017 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 $ 84,620 $ — $ 84,620 $ — $ 84,620 Special Mention — 410 410 — 410 Total 84,620 410 85,030 — 85,030 LTV => 35% Pass 346,229 628 346,857 — 346,857 Special Mention 832 1,338 2,170 — 2,170 Substandard 7,675 998 8,673 3,051 11,724 Total 354,736 2,964 357,700 3,051 360,751 Total commercial 439,356 3,374 442,730 3,051 445,781 One-to-four family residential LTV < 60% Pass 57,907 2,493 60,400 — 60,400 Special Mention — 683 683 — 683 Substandard 322 614 936 534 1,470 Total 58,229 3,790 62,019 534 62,553 LTV => 60% Pass 38,504 — 38,504 — 38,504 Substandard 554 — 554 39 593 Total 39,058 — 39,058 39 39,097 Total one-to-four family residential 97,287 3,790 101,077 573 101,650 Construction and land Pass 34,614 6 34,620 — 34,620 Total construction and land 34,614 6 34,620 — 34,620 Multifamily LTV < 35% Pass 131,488 304 131,792 — 131,792 Total 131,488 304 131,792 — 131,792 LTV => 35% Pass 1,603,714 233 1,603,947 — 1,603,947 Special Mention 638 1,259 1,897 — 1,897 Substandard 83 1,501 1,584 — 1,584 Total 1,604,435 2,993 1,607,428 — 1,607,428 Total multifamily 1,735,923 3,297 1,739,220 — 1,739,220 Home equity and lines of credit Pass 67,426 — 67,426 — 67,426 Special Mention 28 — 28 — 28 Substandard 146 — 146 79 225 Total home equity and lines of credit 67,600 — 67,600 79 67,679 Commercial and industrial loans Pass 34,003 138 34,141 — 34,141 Special Mention 547 24 571 — 571 Substandard 109 — 109 72 181 Total Commercial and industrial loans 34,659 162 34,821 72 34,893 Other loans Pass 1,403 29 1,432 — 1,432 Total other loans 1,403 29 1,432 — 1,432 Total originated loans held-for-investment 2,410,842 10,658 2,421,500 3,775 2,425,275 December 31, 2017 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Loans acquired: One-to-four family residential LTV < 60% Pass 250,149 224 250,373 — 250,373 Special Mention 455 — 455 — 455 Substandard 417 150 567 228 795 Total 251,021 374 251,395 228 251,623 LTV => 60% Pass 23,295 — 23,295 — 23,295 Substandard 135 — 135 — 135 Total 23,430 — 23,430 — 23,430 Total one-to-four family residential 274,451 374 274,825 228 275,053 Commercial LTV < 35% Pass 50,035 70 50,105 — 50,105 Special Mention 91 — 91 — 91 Substandard — 181 181 205 386 Total 50,126 251 50,377 205 50,582 LTV => 35% Pass 108,125 158 108,283 — 108,283 Special Mention — 133 133 — 133 Substandard 3,703 430 4,133 831 4,964 Total 111,828 721 112,549 831 113,380 Total commercial 161,954 972 162,926 1,036 163,962 Construction and land Substandard 17,201 — 17,201 — 17,201 Total construction and land 17,201 — 17,201 — 17,201 Multifamily LTV < 35% Pass 189,551 — 189,551 — 189,551 Special Mention 78 — 78 — 78 Substandard 153 — 153 — 153 Total 189,782 — 189,782 — 189,782 LTV => 35% Pass 8,950 — 8,950 — 8,950 Special Mention — — — 417 417 Total 8,950 — 8,950 417 9,367 Total multifamily 198,732 — 198,732 417 199,149 Home equity and lines of credit Pass 20,291 — 20,291 — 20,291 Substandard 87 — 87 77 164 Total home equity and lines of credit 20,378 — 20,378 77 20,455 Commercial and industrial loans Pass 16,904 40 16,944 — 16,944 Substandard — — — 2 2 Total Commercial and industrial loans 16,904 40 16,944 2 16,946 Other loans Pass 36 — 36 1 37 Total loans acquired 689,656 1,386 691,042 1,761 692,803 $ 3,100,498 $ 12,044 $ 3,112,542 $ 5,536 $ 3,118,078 The following table summarizes originated and acquired (subsequent to acquisition) impaired loans as of December 31, 2018 and 2017 (in thousands): At December 31, 2018 December 31, 2017 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 $ — $ — $ 139 $ — LTV => 35% Pass 5,931 6,817 — 6,263 7,150 — Substandard 12,160 15,028 — 9,745 10,560 — One-to-four family residential LTV < 60% Pass 1,532 1,606 — 1,189 1,254 — Substandard 241 241 — 251 251 — LTV => 60% Pass 129 158 — 136 161 — Substandard 126 278 — 135 286 — Multifamily LTV < 35% Substandard 152 152 — 153 153 — LTV => 35% Pass 38 509 — 1,309 1,780 — Substandard 1,229 1,229 — — — — Home Equity Pass 28 28 — 33 33 — Commercial and industrial loans Substandard 52 119 — 135 135 — With a Related Allowance Recorded: Real estate loans: One-to-four family residential LTV < 60% Pass — — — 411 411 (7 ) Substandard 657 657 (18 ) 997 997 (49 ) LTV => 60% Pass — — — 268 268 (19 ) Home equity and lines of credit Substandard 33 33 (5 ) 36 36 (4 ) Commercial and industrial loans Special Mention 21 21 (3 ) 24 24 (3 ) Total: Real estate loans: Commercial 18,091 21,984 — 16,008 17,849 — One-to-four family residential 2,685 2,940 (18 ) 3,387 3,628 (75 ) Multifamily 1,419 1,890 — 1,462 1,933 — Home equity and lines of credit 61 61 (5 ) 69 69 (4 ) Commercial and industrial loans 73 $ 140 (3 ) 159 159 (3 ) $ 22,329 $ 27,015 $ (26 ) $ 21,085 $ 23,638 $ (82 ) Included in the table above at December 31, 2018 , are impaired loans with carrying balances of $16.6 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, 2017 , are 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. L

Premises and Equipment, Net

Premises and Equipment, Net	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Premises and Equipment, Net	Premises and Equipment, Net At December 31, 2018 and 2017 , premises and equipment, less accumulated depreciation and amortization, consists of the following (in thousands): December 31, 2018 2017 At cost: Land $ 4,018 $ 4,018 Buildings and improvements 8,905 8,883 Capital leases 2,600 2,600 Furniture, fixtures, and equipment 24,140 22,677 Leasehold improvements 30,115 28,721 69,778 66,899 Accumulated depreciation and amortization (44,173 ) (41,153 ) Premises and equipment, net $ 25,605 $ 25,746 Depreciation expense for the years ended December 31, 2018 , 2017 , and 2016 , was $3.0 million , $3.2 million , and $3.6 million , respectively. There were no sales of premises and equipment in 2018 , 2017 , or 2016 .

Deposits

Deposits	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Deposits	Deposits Deposit account balances are summarized as follows (dollars in thousands): As of December 31, 2018 2017 Amount Weighted Average Rate Amount Weighted Average Rate Transaction: Negotiable orders of withdrawal $ 458,012 0.68 % $ 465,140 0.39 % Non-interest bearing checking 395,375 — % 407,267 — % Total transaction 853,387 0.36 % 872,407 0.21 % Savings: Money market 741,939 1.12 % 800,854 0.72 % Savings 594,290 0.90 % 424,789 0.18 % Total savings 1,336,229 1.02 % 1,225,643 0.53 % Certificates of deposit: Under $100,000 599,245 1.91 % 401,063 1.42 % $100,000 or more 497,651 2.01 % 337,866 1.51 % Total certificates of deposit 1,096,896 1.96 % 738,929 1.46 % Total deposits $ 3,286,512 1.16 % $ 2,836,979 0.67 % The Company had brokered deposits (included in certificates of deposit in the above table) of $275.4 million and $150.6 million at December 31, 2018 and 2017 , respectively. Scheduled maturities of certificates of deposit are summarized as follows (in thousands): December 31, 2018 2019 $ 841,562 2020 138,277 2021 36,282 2022 46,187 2023 34,588 Thereafter — Total $ 1,096,896 Interest expense on deposits is summarized as follows (in thousands): December 31, 2018 2017 2016 Transaction $ 2,175 $ 1,429 $ 957 Savings and money market 8,878 6,804 6,801 Certificates of deposit 16,688 8,153 6,529 $ 27,741 $ 16,386 $ 14,287

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Borrowings	Borrowings Borrowings consisted of FHLB advances, floating rate advances, obligations under capital leases, and securities sold under agreements to repurchase (repurchase agreements), and are summarized as follows (in thousands): December 31, 2018 2017 Repurchase agreements $ — $ 2,000 Other borrowings: FHLB advances 403,502 464,217 Floating rate advances 5,345 5,033 Obligations under capital leases 44 299 $ 408,891 $ 471,549 FHLB advances are secured by a blanket lien on unencumbered securities and the Company’s FHLB capital stock. FHLB advances have contractual maturities as follows (in thousands): December 31, 2018 FHLB Advances 2019 $ 123,502 2020 90,000 2021 70,000 2022 20,000 2023 87,500 Thereafter 12,500 $ 403,502 There were no repurchase agreements at December 31, 2018 . At December 31, 2017 , repurchase agreements had a weighted average rate of 3.39% , with $2.0 million maturing in the first quarter of 2018. The repurchase agreements were secured primarily by mortgage-backed securities with an amortized cost of $4.7 million , and a fair value of $4.6 million , at December 31, 2017 . The Company has the ability to obtain additional funding from the FHLB and Federal Reserve Bank discount window of approximately $1.23 billion , utilizing unencumbered and unpledged securities of $462.4 million and multifamily loans of $789.6 million at December 31, 2018 . 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, 2018 2017 2016 Repurchase agreements $ 7 $ 137 $ 569 FHLB advances 8,172 7,390 6,743 Floating rate advances 123 33 27 Obligations under capital leases 7 30 42 $ 8,309 $ 7,590 $ 7,381

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense (benefit) consists of the following (in thousands): December 31, 2018 2017 2016 Federal tax expense (benefit): Current $ 8,540 $ 10,113 $ 14,218 Deferred (742 ) 14,290 (1,260 ) 7,798 24,403 12,958 State and local tax expense (benefit): Current 1,985 1,672 2,506 Deferred (151 ) 903 (1,799 ) 1,834 2,575 707 Total income tax expense $ 9,632 $ 26,978 $ 13,665 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, 2018 , 2017 , and 2016 , is as follows (dollars in thousands): December 31, 2018 2017 2016 Tax expense at statutory rate $ 10,439 $ 18,111 $ 13,928 Applicable statutory federal income tax rate 21 % 35 % 35 % Increase (decrease) in taxes resulting from: State tax, net of federal income tax 1,448 1,674 460 Impact of 2017 federal tax reform — 10,453 — Bank owned life insurance (778 ) (1,885 ) (1,399 ) ESOP fair market value adjustment 196 404 352 Incentive stock options 146 247 299 Uncertain tax position — 132 178 Merger related costs — — 74 Excess tax benefits from employee share based payments (1,939 ) (2,309 ) — Other, net 120 151 (227 ) Income tax expense $ 9,632 $ 26,978 $ 13,665 Federal Tax Reform On December 22, 2017, H.R.1, commonly known as the Tax Cuts and Jobs Act (the “Tax Act”), was signed into law. Among numerous provisions included in the Act was the reduction of the U.S. federal corporate income tax rate from 35% to 21% effective January 1, 2018. As a result of this rate reduction, we were required to re-measure, through income tax expense in the fourth quarter of 2017, our deferred tax assets and liabilities using the enacted rate at which we expect them to be recovered or settled. The re-measurement of our net deferred tax asset resulted in additional 2017 income tax expense of $10.5 million . The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2018 and 2017 , are as follows (in thousands): December 31, 2018 2017 Deferred tax assets: Allowance for loan losses $ 7,317 $ 6,836 Capitalized leases 13 84 Deferred compensation 3,426 3,474 Accrued salaries 737 2 Postretirement benefits 375 381 Equity awards 3,045 3,582 Unrealized actuarial losses on post-retirement benefits 18 93 Straight-line leases adjustment 1,051 892 Asset retirement obligation 67 65 Reserve for accrued interest receivable 602 712 Reserve for loan commitments 146 124 Employee Stock Ownership Plan 551 497 Other 261 236 Depreciation 2,383 2,116 Fair value adjustments of acquired loans 3,934 4,868 Fair value adjustments of pension benefit obligations 154 154 Unrealized losses on securities 3,575 2,070 Total gross deferred tax assets 27,655 26,186 Deferred tax liabilities: Fair value adjustments of acquired securities 28 35 Fair value adjustments of deposit liabilities 285 358 Deferred loan fees 1,984 1,815 Undistributed earnings related to NSB Realty Trust — 939 Other 33 37 Total gross deferred tax liabilities 2,330 3,184 Net deferred tax asset $ 25,325 $ 23,002 Net deferred tax assets are included in other assets on the consolidated balance sheets. In 2016, the Company recorded net deferred tax assets of approximately $3.9 million as a result of the Hopewell Valley acquisition. 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, 2018 and December 31, 2017 , 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, 2018 2017 2016 Beginning balance $ 482 $ 459 $ 281 Settlements based on tax positions related to prior years (238 ) (109 ) — Additions based on tax positions related to prior years 286 132 178 Ending balance $ 530 $ 482 $ 459 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 2015 through present. The 2016 filing is currently under examination. • New York State tax filings 2013 through present. The 2013 through 2014 filings are currently under examination. • New York City tax filings 2013 through present. The 2013 through 2014 filings are currently under examination. • State of New Jersey 2014 through present.

Retirement Benefits

Retirement Benefits	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [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 $394,000 , $387,000 , and $384,000 for the years ended December 31, 2018 , 2017 , and 2016 , respectively. 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 purchased 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, as adjusted. This purchase was funded with a loan from Northfield Bancorp, Inc. to the ESOP. The outstanding balance at December 31, 2018 and 2017 was $10.8 million and $11.5 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 101,514 and 99,670 shares were released and allocated to participants of the ESOP for the years ended December 31, 2018 and 2017 , 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, which purchased 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, 2018 and 2017 was $12.2 million and $12.6 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 52,523 and 51,189 shares were released and allocated to participants of the second ESOP for the years ended December 31, 2018 and 2017 , 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, 2018 , 2017 , and 2016 was $2.0 million , $2.2 million , and $2.0 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 $76,000 , $84,000 , and $82,000 for the years ended December 31, 2018 , 2017 , and 2016 , 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): 2018 2017 2016 Accumulated postretirement benefit obligation beginning of year $ 1,645 $ 1,697 $ 1,950 Service cost 11 11 8 Interest cost 52 57 71 Actuarial (gain) loss (229 ) (8 ) (214 ) Benefits paid (120 ) (112 ) (118 ) Accumulated postretirement benefit obligation end of year 1,359 1,645 1,697 Accrued liability (included in accrued expenses and other liabilities) $ 1,359 $ 1,645 $ 1,697 The following table sets forth the amounts recognized in accumulated other comprehensive income (loss) (in thousands): December 31, 2018 2017 Net loss $ 20 $ 274 Transition obligation — — Prior service cost — — Loss recognized in accumulated other comprehensive income (loss) $ 20 $ 274 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 2019, are $1,800 , $0 , and $0 respectively. The following table sets forth the components of net periodic postretirement benefit costs for the years ended December 31, 2018 , 2017 , and 2016 (in thousands): December 31, 2018 2017 2016 Service cost $ 11 $ 11 $ 8 Interest cost 52 57 71 Amortization of prior service costs — — 12 Amortization of unrecognized loss 25 28 54 Net postretirement benefit cost included in compensation and employee benefits $ 88 $ 96 $ 145 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: 2018 2017 2016 Assumptions used to determine benefit obligation at period end: Discount rate 4.00 % 3.25 % 3.50 % Rate of increase in compensation 4.00 % 4.00 % 4.00 % Assumptions used to determine net periodic benefit cost for the year: Discount rate 3.25 % 3.50 % 3.75 % Rate of increase in compensation 4.00 % 4.00 % 4.00 % At December 31, 2018 , 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 2018 2017 2018 2017 Effect on benefits earned and interest cost $ 4 $ 4 $ (3 ) $ (4 ) Effect on accumulated postretirement benefit obligation 109 111 (94 ) (100 ) 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 2018 2017 2016 2018 2017 2016 Aggregate of service and interest components of net periodic cost (benefit) $ 4 $ 4 $ 6 $ (3 ) $ (4 ) $ (5 ) Benefit payments of approximately $120,000 , $112,000 , and $118,000 were made in 2018 , 2017 , and 2016 , respectively. The benefits expected to be paid under the postretirement health benefits plan for the next five years are as follows: $94,000 in 2019 ; $97,000 in 2020 ; $101,000 in 2021 ; $105,000 in 2022 ; and $95,000 in 2023 . The benefit payments expected to be paid in the aggregate for the years 2024 through 2028 are $438,000 . The expected benefits are based on the same assumptions used to measure the Company’s benefit obligation at December 31, 2018 , and include estimated future employee service. The Company maintains a nonqualified plan to provide for the elective deferral of all or a portion of director fees by members of the 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 $12.7 million and $13.7 million at December 31, 2018 and 2017 , respectively, and is included in accrued expenses and other liabilities on the consolidated balance sheets. (Loss) income under this plan was $(879,000) , $1.1 million , and $503,000 for the years ended December 31, 2018 , 2017 , and 2016 , respectively. 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.

Equity Incentive Plan

Equity Incentive Plan	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Incentive Plan	Equity Incentive Plan The Company maintains the Northfield Bancorp, Inc. 2008 Equity Incentive Plan (the “ 2008 EIP ” ) which allowed the Company to grant common stock or options to purchase common stock at specific prices to directors and employees of the Company through December 17, 2018. The 2008 EIP provided for the issuance or delivery of up to 4,311,796 shares ( 1,231,941 restricted shares and 3,079,855 stock options) of Northfield Bancorp, Inc. common stock subject to certain plan limitations. As of December 31, 2018 , no restricted shares or stock options remain available for issuance under the 2008 EIP. On August 27, 2018 , the Company granted to an employee 3,378 restricted shares. These shares vest on February 27, 2019 . During 2017, the Company granted to certain directors and employees in aggregate 34,500 restricted shares, and 98,244 stock options to purchase Company stock. The stock options and restricted stock granted in 2017 vest in varying installments over a period ranging from 10 to 34 months, the first vesting beginning on May 27, 2018. In November 2016, the Company granted to an employee 20,000 restricted shares and stock 40,000 options to purchase Company stock. Prior to 2017, all stock options and restricted stock granted vested 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 the 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 10 years. 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. There were no stock options granted in 2018. The fair value of stock options granted in 2017 and 2016 was estimated utilizing the Black-Scholes option pricing model using the following assumptions: Year Ended December 31, 2017 2016 Grant Date November 1, 2017 September 19, 2017 August 1, 2017 November 16, 2016 Stock options granted 40,000 12,500 45,744 40,000 Risk-free rate of return 2.06 % 1.89 % 1.86 % 1.8 % Volatility 29.22 % 30.06 % 29.46 % 30.07 % Dividend yield 2.37 % 1.98 % 1.91 % 1.74 % Expected life 5.75 5.75 5.75 6.5 The Company also maintains the Northfield Bancorp, Inc. 2014 Equity Incentive Plan (the “ 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. As of December 31, 2018 , 142,154 restricted shares and 348,373 stock options remain available for issuance under the 2014 EIP. On August 27, 2018, the Company granted to an employee 11,622 restricted shares. These shares vest in three installments over a two year period beginning six months from the date of grant. All stock options and restricted stock granted prior to 2018 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. During the years ended December 31, 2018 , 2017 , and 2016 , the Company recorded, $5.4 million , $6.2 million , and $7.3 million of stock-based compensation. The following table is a summary of the Company’s non-vested stock options as of December 31, 2018 , 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, 2016 5,328,670 $ 3.41 $ 11.36 5.78 Granted 98,244 4.04 16.73 9.71 Forfeited (247,484 ) 3.93 13.68 — Exercised (558,743 ) 2.41 7.52 — Outstanding- December 31, 2017 4,620,687 3.51 11.82 5.17 Granted — — — — Forfeited (29,378 ) 3.36 11.51 — Exercised (1,339,714 ) 2.49 7.75 — Outstanding - December 31, 2018 3,251,595 3.93 13.51 5.62 Exercisable - December 31, 2018 2,440,884 $ 3.89 $ 13.28 5.45 Expected future stock option expense related to the non-vested options outstanding as of December 31, 2018 , is $1.6 million over an average period of 1.1 years. The following is a summary of the status of the Company’s restricted shares as of December 31, 2018 , and changes therein during the year then ended: Number of Shares Awarded Weighted Average Grant Date Fair Value Non-vested at December 31, 2016 924,002 $ 13.82 Granted 34,500 16.70 Vested (279,660 ) 13.68 Forfeited (92,947 ) 13.92 Non-vested at December 31, 2017 585,895 14.05 Granted 15,000 16.48 Vested (266,973 ) 13.86 Forfeited (4,960 ) 14.18 Non-vested at December 31, 2018 328,962 $ 14.31 Expected future stock award expense related to the non-vested restricted awards as of December 31, 2018 , is $2.5 million over an average period of 1.2 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, 2018
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, 2018 and 2017 , the following commitment and contingent liabilities existed that are not reflected in the accompanying consolidated financial statements (in thousands): December 31, 2018 2017 Commitments to extend credit $ 39,326 $ 43,611 Unused lines of credit 136,586 98,433 Standby letters of credit 5,352 7,000 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 both December 31, 2018 and 2017 . The Company maintains an allowance for estimated losses on commitments to extend credit in other liabilities. At December 31, 2018 and 2017 , the allowance was $523,000 and $442,000 , respectively, and changes to the allowance are recorded as a component of other non-interest expense. At December 31, 2018 , 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: 2019 $ 44 $ 5,735 2020 — 5,949 2021 — 5,512 2022 — 4,844 2023 — 4,744 Thereafter — 35,260 Total minimum lease payments $ 44 $ 62,044 Net rental expense included in occupancy expense was approximately $5.7 million , $5.3 million , and $5.2 million for the years ended December 31, 2018 , 2017 , and 2016 , 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 and change in control agreements with its President and Chief Executive Officer and the other executive officers of the Company 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, 2018
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. 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. Under the U.S. Basel III capital framework, both Northfield Bank and the Company must maintain minimum capital requirements which include: (i) a common equity Tier 1 capital to risk-based assets ratio of 4.5% ; (ii) a Tier 1 capital to risk-based assets ratio of 6% ; (iii) a total capital to risk-based assets of 8% ; and (iv) a Tier 1 capital to total assets leverage ratio of 4% . In addition to establishing the minimum regulatory capital requirements, the regulations limit capital distributions and certain discretionary bonus payments to management if the institution 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 was phased in beginning January 1, 2016 at 0.625% of risk-weighted assets and increased each year until it became fully phased by January 1, 2019 at 2.5% . For calendar year 2018, the capital conservation buffer was 1.875% . It increased to 2.50% on January 1, 2019. Management believes that as of December 31, 2018 , and December 31, 2017 , 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, 2018 and 2017 , 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, 2018: Common Equity Tier 1 Capital (to risk-weighted assets) $ 592,815 16.00 % $ 166,742 4.50 % $ 240,850 6.50 % Tier 1 Leverage 592,815 13.81 171,663 4.00 214,579 5.00 Tier I capital (to risk-weighted assets) 592,815 16.00 222,323 6.00 296,430 8.00 Total capital (to risk-weighted assets) 620,863 16.76 296,430 8.00 370,538 10.00 As of December 31, 2017: Common Equity Tier 1 Capital (to risk-weighted assets) $ 559,717 16.70 % $ 150,862 4.50 % $ 217,912 6.50 % Tier 1 Leverage 559,717 14.15 158,220 4.00 197,775 5.00 Tier I capital (to risk-weighted assets) 559,717 16.70 201,150 6.00 268,200 8.00 Total capital (to risk-weighted assets) 586,361 17.49 268,200 8.00 335,250 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, 2018 and 2017 , for classification as well-capitalized 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, 2018: Common Equity Tier 1 Capital (to risk-weighted assets) $ 636,141 17.17 % $ 166,717 4.50 % $ 240,814 6.50 % Tier 1 Leverage 636,141 14.82 171,724 4.00 214,656 5.00 Tier I capital (to risk-weighted assets) 636,141 17.17 222,290 6.00 296,386 8.00 Total capital (to risk-weighted assets) 664,190 17.93 296,386 8.00 370,483 10.00 As of December 31, 2017: Common Equity Tier 1 Capital (to risk-weighted assets) $ 604,208 18.02 % $ 150,917 4.50 % $ 217,991 6.50 % Tier 1 Leverage 604,208 15.27 158,254 4.00 197,818 5.00 Tier I capital (to risk-weighted assets) 604,208 18.02 201,222 6.00 268,296 8.00 Total capital (to risk-weighted assets) 630,853 18.81 268,296 8.00 335,370 10.00

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurement	Fair Value Measurement The following table presents the assets reported on the consolidated balance sheet at their estimated fair value as of December 31, 2018 and 2017 , 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, 2018 and 2017 , 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, 2018 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: Debt securities available-for-sale: Mortgage-backed securities Pass-through certificates: GSE $ 314,788 $ — $ 314,788 $ — REMICs: GSE 250,163 — 250,163 — Non-GSE 58 — 58 — 565,009 — 565,009 — Other debt securities Municipal bonds 273 — 273 Corporate bonds 242,749 — 242,749 — 243,022 — 243,022 — Total debt securities available-for-sale 808,031 — 808,031 — Trading securities 8,968 8,968 — — Equity securities 237 237 — — Total 817,236 9,205 808,031 — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 4,847 $ — $ — $ 4,847 One-to-four family residential mortgage 765 — — 765 Multifamily 39 — — 39 Home equity and lines of credit 28 — — 28 Total impaired real estate loans 5,679 — — 5,679 Commercial and industrial loans 18 — — 18 Total $ 5,697 $ — $ — $ 5,697 Fair Value Measurements at December 31, 2017 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: Debt securities available-for-sale: Mortgage-backed securities Pass-through certificate GSE $ 178,295 $ — $ 178,295 $ — REMICs: 266,929 266,929 — GSE Non-GSE 79 — 79 — 445,303 — 445,303 — Other debt securities Municipal Bonds 349 — 349 — Corporate bonds 68,130 — 68,130 — 68,479 — 68,479 — Total debt securities available-for sale 513,782 — 513,782 — Trading securities 9,597 9,597 — — Equity securities - mutual funds 323 323 — — Total $ 523,702 $ 9,920 $ 513,782 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 4,645 $ — $ — $ 4,645 One-to-four family residential mortgage 1,735 — — 1,735 Multifamily 51 — — 51 Home equity and lines of credit 31 — — 31 Total impaired real estate loans 6,462 — — 6,462 Commercial and industrial loans 21 — — 21 Other real estate owned 850 — — 850 Total $ 7,333 $ — $ — $ 7,333 The following table presents qualitative information for Level 3 assets measured at fair value on a non-recurring basis at December 31, 2018 : Fair Value Valuation Methodology Unobservable Inputs Range of Inputs (in thousands) Impaired loans $ 5,697 Appraisals Discount for costs to sell 7.0% Discount for quick sale 10.0% Discounted cash flows Interest rates 4.13% - 6.25% Other real estate owned $ — 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, 2017 : Fair Value Valuation Methodology Unobservable Inputs Range of Inputs (in thousands) Impaired loans $ 6,483 Appraisals Discount for costs to sell 7.0% Discount for quick sale 10.0% Discounted cash flows Interest rates 3.13% - 6.50% Other real estate owned $ 850 Appraisals Discount for costs to sell 7.0% Debt Securities Available-for-Sale: The estimated fair values for mortgage-backed securities, corporate and other debt 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. There were no transfers of securities between Level 1 and Level 2 during the years ended December 31, 2018 and 2017 . Trading Securities: Fair values are derived from quoted market prices in active markets. The assets consist of publicly traded mutual funds. Equity Securities: Fair values of equity securities consisting of publicly traded mutual funds are derived from quoted market prices in active markets. Impaired Loans: At December 31, 2018 , and December 31, 2017 , the Company had impaired loans held-for-investment with outstanding principal balances of $10.2 million and $8.8 million that were recorded at their estimated fair value of $5.7 million and $6.5 million , respectively. The Company recorded a net decrease in the specific reserve for impaired loans of $56,000 and $246,000 , for the years ended December 31, 2018 and December 31, 2017, respectively. The Company recorded net charge-offs of $1.3 million and net recoveries of $154,000 for the years ended December 31, 2018 and 2017 , 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, 2018 the Company had no assets acquired through foreclosure, as compared to $850,000 at December 31, 2017 . These assets, when held, are 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 Cash and cash equivalents are short-term in nature with original maturities of three months or less ; the carrying amount approximates fair value. (b) Debt 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) Investments in Equity Securities at Net Asset Value Per Share The Company uses net asset value as a practical expedient to record its investment in a private SBA Loan Fund since the shares in the fund are not publicly traded, do not have a readily determinable fair value and the net asset value per share is calculated in a manner consistent with the measurement principles of an investment company. (d) 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. (e) 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. (f) 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. (g) 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. (h) 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. (i) 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. (j) Advance Payments by Borrowers for Taxes and Insurance 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, 2018 and 2017 , are presented in the following table (in thousands): December 31, 2018 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 77,762 $ 77,762 $ — $ — $ 77,762 Trading securities 8,968 8,968 — — 8,968 Debt securities available-for-sale 808,031 323 807,708 — 808,031 Debt securities held-to-maturity 9,505 — 9,249 — 9,249 Equity securities (1) 237 237 — — 237 FHLB of New York stock, at cost 22,517 — 22,517 — 22,517 Net loans held-for-investment 3,217,673 — — 3,236,136 3,236,136 Financial liabilities: Deposits $ 3,286,512 $ — $ 3,291,085 $ — $ 3,291,085 Other borrowings 408,891 — 403,476 — 403,476 Advance payments by borrowers 18,007 — 18,007 — 18,007 December 31, 2017 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 57,839 $ 57,839 $ — $ — $ 57,839 Trading securities 9,597 9,597 — — 9,597 Debt securities available-for-sale 513,782 — 513,782 — 513,782 Debt securities held-to-maturity 9,931 — 9,892 — 9,892 Equity securities (1) 323 323 — — 323 FHLB of New York stock, at cost 25,046 — 25,046 — 25,046 Net loans held-for-investment 3,114,659 — — 3,157,829 3,157,829 Financial liabilities: Deposits $ 2,836,979 $ — $ 2,839,666 $ — $ 2,839,666 Repurchase agreements and other borrowings 471,549 — 466,625 — 466,625 Advance payments by borrowers 14,798 — 14,798 — 14,798 (1) Excludes $1.0 million of investments measured at net asset value at December 31, 2018 and 2017, which have not been classified in the fair value hierarchy. 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.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2018
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 and per share data): December 31, 2018 2017 2016 Net income available to common stockholders $ 40,079 $ 24,768 $ 26,130 Weighted average shares outstanding-basic 46,319,760 45,325,445 44,374,389 Effect of non-vested restricted stock and stock options outstanding 787,673 1,550,285 1,343,498 Weighted average shares outstanding-diluted 47,107,433 46,875,730 45,717,887 Earnings per share-basic $ 0.87 $ 0.55 $ 0.59 Earnings per share-diluted $ 0.85 $ 0.53 $ 0.57 Anti-dilutive shares 765,792 334,927 777,733

Parent-only Financial Informati

Parent-only Financial Information	12 Months Ended
	Dec. 31, 2018
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, 2018 2017 (in thousands) Assets Cash in Northfield Bank $ 21,884 $ 20,080 Interest-earning deposits in other financial institutions 21 21 Investment in Northfield Bank 623,113 594,385 ESOP loan receivable 22,962 24,021 Other assets 120 1,185 Total assets $ 668,100 $ 639,692 Liabilities and Stockholders' Equity Total liabilities $ 1,661 $ 815 Total stockholders' equity 666,439 638,877 Total liabilities and stockholders' equity $ 668,100 $ 639,692 Northfield Bancorp, Inc. Condensed Statements of Comprehensive Income Years Ended December 31, 2018 2017 2016 (in thousands) Interest on ESOP loan $ 1,081 $ 939 $ 913 Interest income on deposit in Northfield Bank 38 31 31 (Losses) gains on securities, net (6 ) 5 4 Undistributed earnings of Northfield Bank 40,092 24,887 26,303 Total income 41,205 25,862 27,251 Other expenses 890 872 936 Income tax expense 236 222 185 Total expense 1,126 1,094 1,121 Net income $ 40,079 $ 24,768 $ 26,130 Comprehensive income: Net income $ 40,079 $ 24,768 $ 26,130 Other comprehensive loss, net of tax (3,696 ) (227 ) (1,346 ) Comprehensive income $ 36,383 $ 24,541 $ 24,784 Northfield Bancorp, Inc. Condensed Statements of Cash Flows December 31, 2018 2017 2016 (in thousands) Cash flows from operating activities Net income $ 40,079 $ 24,768 $ 26,130 Adjustments to reconcile net income to net cash provided by operating activities: Decrease (increase) in other assets 3 (2,008 ) (1,994 ) Losses (gains) on securities, net 6 (5 ) (4 ) Increase (decrease) in other liabilities 846 (980 ) 1,238 Undistributed earnings of Northfield Bank (40,092 ) (24,887 ) (26,303 ) Net cash provided by (used in) operating activities 842 (3,112 ) (933 ) Cash flows from investing activities Cash consideration paid for business acquisition — — (13,644 ) Dividends from Northfield Bank 16,493 28,763 14,700 Net cash provided by investing activities 16,493 28,763 1,056 Cash flows from financing activities Principal payments on ESOP loan receivable 1,059 1,022 969 Purchase of treasury stock (5 ) — (2,201 ) Dividends paid (18,673 ) (15,646 ) (14,074 ) Exercise of stock options 2,088 100 120 Additional tax benefit on stock awards — — 1,512 Net cash used in financing activities (15,531 ) (14,524 ) (13,674 ) Net increase (decrease) in cash and cash equivalents 1,804 11,127 (13,551 ) Cash and cash equivalents at beginning of year 20,101 8,974 22,525 Cash and cash equivalents at end of year $ 21,905 $ 20,101 $ 8,974

Selected Quarterly Financial Da

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2018
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, 2018 and 2017 : 2018 Quarter Ended March 31 June 30 September 30 December 31 (Dollars in thousands, except per share data) Selected Operating Data: Interest income $ 34,682 $ 35,935 $ 37,727 $ 38,948 Interest expense 7,138 8,165 9,803 10,944 Net interest income 27,544 27,770 27,924 28,004 Provision for loan losses 34 670 1,304 607 Net interest income after provision for loan losses 27,510 27,100 26,620 27,397 Other income 2,405 2,445 2,637 640 Other expenses 17,126 17,040 17,100 15,777 Income before income tax expense 12,789 12,505 12,157 12,260 Income tax expense 2,344 1,893 3,081 2,314 Net income $ 10,445 $ 10,612 $ 9,076 $ 9,946 Net income per basic common share $ 0.23 $ 0.23 $ 0.19 $ 0.21 Net income per diluted common share $ 0.22 $ 0.23 $ 0.19 $ 0.21 2017 Quarter Ended March 31 June 30 September 30 December 31 (Dollars in thousands, except per share data) Selected Operating Data: Interest income $ 32,069 $ 32,660 $ 33,525 $ 34,615 Interest expense 5,392 5,751 6,173 6,660 Net interest income 26,677 26,909 27,352 27,955 Provision (recoveries) for loan losses 372 511 488 40 Net interest income after provision for loan losses 26,305 26,398 26,864 27,915 Other income 4,147 2,437 2,615 2,443 Other expenses 17,544 16,618 16,828 16,388 Income before income tax expense 12,908 12,217 12,651 13,970 Income tax expense 2,960 3,807 4,525 15,686 Net income (loss) $ 9,948 $ 8,410 $ 8,126 $ (1,716 ) Net income (loss) per basic common share $ 0.22 $ 0.19 $ 0.18 $ (0.04 ) Net income (loss) per diluted common share $ 0.21 $ 0.18 $ 0.17 $ (0.04 )

Revenue from Contracts with Cus

Revenue from Contracts with Customers	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue from Contracts with Customers Effective January 1, 2018, the Company adopted ASU No. 2014-09 (Topic 606) and all subsequent ASUs that modified Topic 606. For further details on Topic 606 see Note 1(s) - “Summary of Significant Accounting Policies”. The adoption of Topic 606 did not have any impact on the measurement or recognition of revenue as it does not apply to revenue associated with financial instruments, including revenue from loans and investment securities, which is the Company's primary source of revenue. In addition, certain non-interest income streams such as income on bank owned life insurance, gains on securities, and other non-interest income are not in the scope of the guidance. The Company’s revenue streams that are within the scope of Topic 606 include service charges on deposit accounts, ATM and card interchange fees, and investment services fees. However, the revenue recognition of these revenue streams did not change upon adoption of Topic 606 as our customer contracts generally do not have performance obligations and fees are assessed and collected as the transaction occurs. The following table summarizes non-interest income for the periods indicated (in thousands): December 31, 2018 2017 2016 Fees and service charges for customer services: Service charges 3,356 $ 3,320 $ 3,516 ATM and card interchange fees 1,216 1,150 1,130 Investment fees 305 232 288 Total fees and service charges for customer services 4,877 4,702 4,934 Income on bank owned life insurance (1) 3,705 5,386 3,998 (Losses) gains on securities, net (1) (701 ) 1,283 813 Other (1) 246 271 327 Total non-interest income $ 8,127 $ 11,642 $ 10,072 (1) Not within the scope of Topic 606 Fees and service charges for customer services include: (i) service charges on deposit accounts, including account maintenance fees, overdraft fees, insufficient funds fees, wire fees, and other deposit related fees; (ii) ATM and card interchange fees, which include fees generated when a Bank cardholder uses a non-Bank ATM or a non-Bank cardholder uses a Bank ATM, and fees earned whenever the Bank's debit cards are processed through card payment networks such as Visa; and (iii) investment services fees earned through partnering with a third party investment and brokerage service firm to provide insurance and investment products to customers. The Company's performance obligation for fees and service charges is satisfied and related revenue recognized immediately or in the month of performance of services.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
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 purchased credit-impaired (“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 uncertain matters. Actual results may differ from the estimates and assumptions. Certain prior year amounts 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 debt securities held-to-maturity, debt securities available-for-sale, trading account securities or equity securities. Debt securities held-to-maturity are those that management has the positive intent and ability to hold until maturity. Debt 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. Debt securities available-for-sale represents all securities not classified as either held-to-maturity, trading, or equity. Debt 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, using quoted prices in active markets, with unrealized holding gains and losses reported as a component of gain (loss) on securities, net in non-interest income. Equity securities with readily determinable fair values are stated at fair value with unrealized gains and losses reported as a component of gain (loss) on securities, net in non-interest income. Equity securities without readily determinable fair values are recorded at net asset value less any impairment, if any. Beginning January 1, 2018, upon adoption of Accounting Standards Update (“ASU”) No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, the Company reclassified its equity securities out of available-for-sale securities to equity securities on the consolidated balance sheets for all periods presented. 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 classified as 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 fair value of the underlying collateral (less estimated costs to sell) if the loan is collateral dependent. Impairments, if any, are recognized through a charge to the allowance 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. 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 0.125% 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, 2018 and 2017 .
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. For the year ended December 31, 2018 , we elected to perform step one of the two-step goodwill impairment test for our reporting unit. 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, 2018 , the carrying value of goodwill totaled $38.4 million . The Company performed its annual goodwill impairment test, as of December 31, 2018 , 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 debt 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) and its components is presented in the Consolidated Statements of Comprehensive Income.
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 (the “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. 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 Company accounts for forfeitures as they occur. 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. In March 2016, the FASB issued ASU No. 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, a new standard that simplifies certain aspects of accounting for share-based payments. The Company adopted ASU No. 2016-09 effective January 1, 2017. The update amended the diluted earnings per share calculation in that excess tax benefits are no longer included in assumed proceeds when determining average diluted shares outstanding under the treasury stock method. This guidance was applied prospectively upon adoption. When applying the treasury stock method for the years ended December 31, 2018 and 2017, we added the assumed proceeds from option exercises and the average unamortized compensation costs related to unvested shares of restricted stock and stock options. We then divided 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. For the year ended December 31, 2016, we added (1) the assumed proceeds from option exercises; (2) the tax benefit that would have been 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 divided 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.
Advertising costs	Advertising costs Advertising costs are expensed in the period they are incurred.
Recent Accounting Developments	Recent Accounting Developments Accounting Pronouncements Adopted in 2018 ASU No. 2014-09. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) . The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies generally will be required to use more judgment and make more estimates than under current guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. Subsequent to the issuance of ASU No. 2014-09, the FASB issued targeted updates to clarify specific implementation issues including ASU No. 2016-08, “Principal versus Agent Considerations (Reporting Revenue Gross versus Net),” ASU No. 2016-10, “Identifying Performance Obligations and Licensing,” ASU No. 2016-12, “Narrow-Scope Improvements and Practical Expedients,” and ASU No. 2016-20 “Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers.” The new standard was effective for the Company on January 1, 2018. The adoption of ASU No. 2014-09 did not have a material impact on the Company’s consolidated financial statements and related disclosures as the Company’s primary sources of revenues are derived from interest income on financial assets that are not within the scope of the guidance. Management conducted an assessment of the revenue streams that were potentially affected by the guidance and reviewed contracts in scope to ensure compliance with the guidance. These contracts included those related to service charges on deposit accounts, ATM and card interchange fees, and investment services fees. The Company’s revenue recognition pattern for these revenue streams did not change from current practice. Additional disclosures required by the standard have been included in Note 19. “Revenue Recognition.” ASU No. 2016-01. In January 2016, the FASB issued 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 including the following: 1) Requires equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; 2) Simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; 3) Requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; 4) Requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value and 5) Reduces diversity in current practice by clarifying that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available for sale securities in combination with the entity’s other deferred tax assets. ASU No. 2016-01 is effective for the Company for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The Company adopted ASU No. 2016-01 effective January 1, 2018, which did not have a material impact on the Company’s consolidated financial statements due to the Company's proportionately small portfolio of equity securities and no liabilities that are measured at fair value. The primary impact of the adoption of ASU No. 2016-01 was the reclassification of equity securities from available-for-sale to equity securities on the consolidated balance sheets and the use of an exit price notion for valuing loans at fair value. See Note 5 - “Equity Securities” and Note 15 - “Fair Value Measurements” for further details. ASU No. 2016-15. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments , which provides guidance on how certain cash receipts and cash payments should be classified and presented in the statement of cash flows. ASU No. 2016-15 includes guidance on eight specific cash flow issues with the objective of reducing the existing diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. ASU No. 2016-15 is effective for annual and interim reporting periods beginning after December 15, 2017. The Company adopted ASU No. 2016-15 effective January 1, 2018, which did not have a material impact on the Company's consolidated statements of cash flows. ASU No. 2017-07. In March 2017, the FASB issued ASU No. 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost , which requires that companies disaggregate the service cost component from other components of net benefit cost. The guidance requires companies that offer postretirement benefits to present the service cost, which is the amount an employer has to set aside each quarter or fiscal year to cover the benefits, in the same line item with other current employee compensation costs. Other components of net benefit cost will be presented in the income statement separately from the service cost component and outside the subtotal of income from operations, if one is presented. The Company adopted ASU No. 2017-07 effective January 1, 2018, which did not have a material impact on the Company’s consolidated financial statements. ASU No. 2018-02. In February 2018, the FASB issued ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which allows an entity to elect a reclassification from accumulated other comprehensive income (AOCI) to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. The guidance states that if an entity elects to reclassify the income tax effects, the amount of that reclassification should include the effect of the change in the tax rate on the gross deferred tax amounts and related valuation allowances, in addition to other income tax effects on items remaining in AOCI. The ASU is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years with early adoption permitted in a period for which financial statements have not yet been issued. The Company early adopted ASU 2018-02 retrospectively to December 31, 2017, which resulted in the reclassification from AOCI to retained earnings of $892,000 , reflected in the Consolidated Statements of Changes in Stockholders' Equity. ASU No. 2018-03. In February 2018, the FASB issued ASU No. 2018-03, Technical Corrections and Improvements to Financial Instruments-Overall (Subtopic 825-10), which clarifies certain aspects of the guidance issued in ASU No. 2016-01 including: the ability to irrevocably elect to change the measurement approach for equity securities measured using the practical expedient (at cost plus or minus observable transactions less impairment) to a fair value method in accordance with Topic 820, Fair Value Measurement; clarification that if an observable transaction occurs for such securities, the adjustment is as of the observable transaction date; clarification that the prospective transition approach for equity securities without a readily determinable fair value is meant only for instances in which the practical expedient is elected; and various other clarifications. ASU No. 2018-03 is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years beginning after June 15, 2018. The Company adopted ASU No. 2018-03 during the third quarter 2018, which did not have a material impact on the Company’s consolidated financial statements. Accounting Pronouncements Not Yet Adopted ASU 2018-15: In August 2018, the FASB issued ASU No. 2018-15: Intangibles-Goodwill and Other- Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force), which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. Specifically, where a cloud computing arrangement includes a license to internal-use software, the software license is accounted for by the customer in accordance with Subtopic 350-40. ASU 2018-15 is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. The amendments in this update allow both retrospective and prospective application. The Company does not expect the adoption of ASU No. 2018-15 to have a material impact on its consolidated financial statements. ASU 2018-14. In August 2018, the FASB issued ASU No. 2018-14, “Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans.” This ASU makes minor changes to the disclosure requirements for employers that sponsor defined benefit pension and/or other postretirement benefit plans. ASU 2018-14 is effective for fiscal years ending after December 15, 2020; early adoption is permitted. As ASU 2018-14 only revises disclosure requirements, it will not have an impact on the Company’s consolidated financial statements. ASU 2018-07. In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting, which is intended to align the accounting for share-based payment awards issued to employees and nonemployees. ASU 2018-07 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. The Company's share-based payment awards to nonemployees have historically consisted only of grants made to the Company's Directors as compensation solely related to the individual's role as a Director. As such, the ASU is not expected to have an impact on the Company's consolidated financial statements, as share-based payment awards to nonemployee Directors are accounted for in the same manner as share-based payment awards for employees. ASU No. 2017-08. In March 2017, the FASB issued ASU No. 2017-08, Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities . The amendments in this update require the premium on callable debt securities to be amortized to the earliest call date rather than the maturity date; however, securities held at a discount continue to be amortized to maturity. The amendments apply only to debt securities purchased at a premium that are callable at fixed prices and on preset dates. The amendments more closely align interest income recorded on debt securities held at a premium or discount with the economics of the underlying instrument. ASU No. 2017-08 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted, and is to be applied using the modified retrospective method. ASU No. 2017-08 is not expected to have a significant effect on the Company's consolidated financial statements. ASU No 2017-04. In January 2017, the FASB issued ASU No. 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The ASU simplifies the subsequent measurement of goodwill impairment by eliminating the requirement to calculate the implied fair value of goodwill (i.e., the current Step 2 of the goodwill impairment test) to measure a goodwill impairment charge. As amended, the goodwill impairment test will consist of one step comparing the fair value of a reporting unit with its carrying amount. A goodwill impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value. The ASU is effective for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim and annual goodwill impairment testing dates after January 1, 2017. The adoption of this pronouncement is not expected to have an effect on the Company's consolidated financial statements. ASU No. 2016-13. In June 2016, the FASB issued No. ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , which requires credit losses on most financial assets measured at amortized cost and certain other instruments to be measured using an expected credit loss model (referred to as the current expected credit loss (“CECL”) model. Under this model, entities will estimate credit losses over the entire contractual term of the instrument from the date of initial recognition of that instrument. Current US GAAP is based on an incurred loss model that delays recognition of credit losses until it is probable the loss has been incurred. Accordingly, it is anticipated that credit losses will be recognized earlier under the CECL model than under the incurred loss model. ASU No. 2016-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted for interim and annual reporting periods beginning after December 15, 2018. The Company continues to evaluate the potential effect of adoption of this pronouncement on its consolidated financial statements by identifying key interpretive issues, assessing its processes, portfolio segmentation, model development, and identifying the data and system requirements against the guidance to determine what modifications may be required. As part of the evaluation process, the Company has established a CECL cross-function working group that includes individuals from various functional areas to assess processes and has contracted with a third-party vendor to implement enhanced modeling techniques that incorporate the loss measurement requirements in these amendments as part of adopting the ASU. The adoption of ASU No. 2016-13 may result in an increase in the allowance for loan losses as a result of changing from an incurred loss model, which encompasses allowances for current known and inherent losses within the portfolio, to an expected losses model, which encompasses allowances for losses expected to be incurred over the life of the portfolio. The extent of the effect is indeterminable at this time as it will depend upon the nature and characteristics of the Company's loan portfolio at the adoption date, as well as economic conditions and forecasts at that date. ASU No. 2016-02. In February 2016, the FASB issued 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 new guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that reporting period. The Company's operating leases relate primarily to office space and bank branches, currently not recognized on the balance sheet. The Company adopted ASU No. 2016-02 effective January 1, 2019 and elected to apply the guidance as of the beginning of the period of adoption (January 1, 2019) and not restate comparative periods. The Company also elected certain optional practical expedients, which allow the Company to forego a reassessment of (1) whether any expired or existing contracts are or contain leases, (2) the lease classification for any expired or existing leases, and (3) the initial direct costs for any existing leases. The adoption of the new standard resulted in the Company recording a right-of-use asset and an additional lease liability on its consolidated balance sheet of approximately $43.4 million and $47.2 million , respectively, based on the present value of the expected remaining lease payments. The Company also anticipates additional disclosures to be provided on its quarterly report on Form 10-Q for the quarter ended March 31, 2019. Adoption of the standard did not result in material changes to the Company's consolidated results of operations.
Fair Value Measurement	Fair Value Measurement The following table presents the assets reported on the consolidated balance sheet at their estimated fair value as of December 31, 2018 and 2017 , 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.
Fair Value of Financial Instruments	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 Cash and cash equivalents are short-term in nature with original maturities of three months or less ; the carrying amount approximates fair value. (b) Debt 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) Investments in Equity Securities at Net Asset Value Per Share The Company uses net asset value as a practical expedient to record its investment in a private SBA Loan Fund since the shares in the fund are not publicly traded, do not have a readily determinable fair value and the net asset value per share is calculated in a manner consistent with the measurement principles of an investment company. (d) 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. (e) 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. (f) 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. (g) 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. (h) 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. (i) 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. (j) Advance Payments by Borrowers for Taxes and Insurance Advance payments by borrowers for taxes and insurance have no stated maturity; the fair value is equal to the amount currently payable.

Business Combination (Tables)

Business Combination (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of acquisition for Hopewell Valley (in thousands): ASSETS ACQUIRED: January 8, 2016 Cash and cash equivalents, net $ 55,479 Securities available for sale 61,633 Loans 342,566 Accrued interest receivable 1,452 Bank-owned life insurance 11,269 Premises and equipment 5,926 Federal Home Loan Bank of New York stock, at cost 476 Goodwill 22,252 Other intangible assets 2,013 Other assets 5,389 Total assets acquired $ 508,455 LIABILITIES ASSUMED: Deposits $ 456,203 Other borrowings 2,213 Other liabilities 8,318 Total liabilities assumed $ 466,734 Net assets acquired $ 41,721

Debt Securities Available-for_2

Debt Securities Available-for-Sale (Tables)	12 Months Ended
	Dec. 31, 2018
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 debt securities available-for-sale at December 31, 2018 and 2017 (in thousands): 2018 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises (GSE) $ 317,530 $ 800 $ 3,542 $ 314,788 Real estate mortgage investment conduits (REMICs): GSE 258,050 92 7,979 250,163 Non-GSE 59 — 1 58 575,639 892 11,522 565,009 Other debt securities: Municipal bonds 270 3 — 273 Corporate bonds 244,892 72 2,215 242,749 245,162 75 2,215 243,022 Total debt securities available-for-sale $ 820,801 $ 967 $ 13,737 $ 808,031 2017 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: GSE $ 179,320 $ 1,429 $ 2,454 $ 178,295 REMICs: GSE 273,501 287 6,859 266,929 Non-GSE 80 — 1 79 452,901 1,716 9,314 445,303 Other debt securities: Municipal bonds 343 6 — 349 Corporate bonds 67,927 401 198 68,130 68,270 407 198 68,479 Total debt securities available-for-sale $ 521,171 $ 2,123 $ 9,512 $ 513,782
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, 2018 (in thousands): Available-for-sale Amortized cost Estimated fair value Due in one year or less $ 33,073 $ 33,007 Due after one year through five years 202,193 200,430 Due after five years through ten years 9,896 9,585 $ 245,162 $ 243,022
Gross Unrealized Losses On Mortgage-Backed Securities	Gross unrealized losses on mortgage-backed securities and other debt securities 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, 2018 and 2017 , were as follows (in thousands): December 31, 2018 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 $ 404 $ 82,781 $ 3,138 $ 100,109 $ 3,542 $ 182,890 REMICs: GSE 269 46,921 7,710 181,512 7,979 228,433 Non-GSE — — 1 58 1 58 Other debt securities: Corporate bonds 1,703 173,219 512 25,675 2,215 198,894 Total $ 2,376 $ 302,921 $ 11,361 $ 307,354 $ 13,737 $ 610,275 December 31, 2017 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 $ 439 $ 48,931 $ 2,015 $ 76,113 $ 2,454 $ 125,044 REMICs: GSE 933 103,644 5,926 139,830 6,859 243,474 Non-GSE — — 1 79 1 79 Other debt securities: Corporate bonds 61 11,006 137 15,084 198 26,090 Total $ 1,433 $ 163,581 $ 8,079 $ 231,106 $ 9,512 $ 394,687

Debt Securities Held-to-Matur_2

Debt Securities Held-to-Maturity (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 and 2017 (in thousands): 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 9,505 $ — $ 256 $ 9,249 Total securities held-to-maturity $ 9,505 $ — $ 256 $ 9,249 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 9,931 $ 17 $ 56 $ 9,892 Total securities held-to-maturity $ 9,931 $ 17 $ 56 $ 9,892
Held-to-Maturity Securities	Gross unrealized losses on mortgage-backed securities held-to-maturity, 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, 2018 and 2017 , were as follows (in thousands): December 31, 2018 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: GSEs $ 34 $ 2,133 $ 222 $ 7,116 $ 256 $ 9,249 Total $ 34 $ 2,133 $ 222 $ 7,116 $ 256 $ 9,249 December 31, 2017 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: GSEs $ 7 $ 3,922 $ 49 $ 3,735 $ 56 $ 7,657 Total $ 7 $ 3,922 $ 49 $ 3,735 $ 56 $ 7,657

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Net Loans Held-For-Investment	Loans held-for-investment, net, consists of the following (in thousands): December 31, 2018 2017 Originated loans: Real estate loans: Multifamily $ 1,930,535 $ 1,735,712 Commercial mortgage 499,311 445,225 One-to-four family residential mortgage 91,371 100,942 Home equity and lines of credit 78,593 66,254 Construction and land 26,552 34,545 Total real estate loans 2,626,362 2,382,678 Commercial and industrial loans 44,104 34,828 Other loans 1,519 1,430 Total commercial and industrial and other loans 45,623 36,258 Deferred loan cost, net 6,892 6,339 Originated loans held-for-investment, net 2,678,877 2,425,275 PCI Loans 20,143 22,741 Loans acquired: One-to-four family residential mortgage 225,877 275,053 Multifamily 145,485 199,149 Commercial mortgage 133,263 163,962 Home equity and lines of credit 17,583 20,455 Construction and land 12,003 17,201 Total acquired real estate loans 534,211 675,820 Commercial and industrial loans 11,933 16,946 Other loans 6 37 Total loans acquired 546,150 692,803 Loans held for investment, net 3,245,170 3,140,819 Allowance for loan losses (27,497 ) (26,160 ) Net loans held-for-investment $ 3,217,673 $ 3,114,659
PCI Loans Acquired	The following table sets forth information regarding the estimates of the contractually required payments, the cash flows expected to be collected, and the estimated fair value of the PCI loans acquired from Hopewell Valley at January 8, 2016 (in thousands): January 8, 2016 Contractually required principal and interest at acquisition $ 16,580 Contractual cash flows not expected to be collected (non-accretable discount) (9,929 ) Expected cash flows to be collected at acquisition 6,651 Interest component of expected cash flows (accretable discount) (845 ) Fair value of acquired loans $ 5,806
Summary Of Changes In Accretable Yields Of Acquired Loans	The following details the accretable yield (in thousands): For The Year Ended December 31, 2018 2017 Balance at the beginning of year $ 24,502 $ 24,215 Accretion into interest income (4,176 ) (5,477 ) Net reclassification from non-accretable difference (1) 1,520 5,764 Balance at end of year $ 21,846 $ 24,502 (1) Reclassifications of the non-accretable difference to the accretable yield may occur subsequent to the loan acquisition dates due to increases in expected cash flows of the loans.
Activity In Allowance For Loan Losses	A summary of changes in the allowance for loan losses for the years ended December 31, 2018 , 2017 , and 2016 follows (in thousands): December 31, 2018 2017 2016 Balance at beginning of year $ 26,160 $ 24,595 $ 24,770 Provision for loan losses 2,615 1,411 635 Recoveries 112 556 194 Charge-offs (1,390 ) (402 ) (1,004 ) Balance at end of year $ 27,497 $ 26,160 $ 24,595 The following table sets forth activity in our allowance for loan losses, by loan type, for the years ended December 31, 2018 and 2017 . 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, 2018 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 $ 5,196 $ 503 $ 610 $ 17,374 $ 122 $ 1,273 $ 94 $ — $ 25,172 $ 951 $ 37 $ 26,160 Charge-offs (1,256 ) (3 ) — — (60 ) (70 ) — — (1,389 ) — (1 ) (1,390 ) Recoveries 49 4 — 26 — 20 — — 99 — 13 112 Provisions (credit) 1,641 (162 ) (147 ) 684 229 346 14 — 2,605 59 (49 ) 2,615 Ending Balance $ 5,630 $ 342 $ 463 $ 18,084 $ 291 $ 1,569 $ 108 $ — $ 26,487 $ 1,010 $ — $ 27,497 Ending balance: individually evaluated for impairment $ — $ 18 $ — $ — $ 5 $ 3 $ — $ — $ 26 $ — $ — $ 26 Ending balance: collectively evaluated for impairment $ 5,630 $ 324 $ 463 $ 18,084 $ 286 $ 1,566 $ 108 $ — $ 26,461 $ 1,010 $ — $ 27,471 Loans, net: Ending Balance $ 499,860 $ 92,433 $ 26,613 $ 1,933,946 $ 80,315 $ 44,190 $ 1,520 $ — $ 2,678,877 $ 20,143 $ 546,150 $ 3,245,170 Ending balance: individually evaluated for impairment $ 15,252 $ 1,893 $ — $ 1,268 $ 61 $ 73 $ — $ — $ 18,547 $ — $ 3,782 $ 22,329 Ending balance: collectively evaluated for impairment $ 484,608 $ 90,540 $ 26,613 $ 1,932,678 $ 80,254 $ 44,117 $ 1,520 $ — $ 2,660,330 $ 20,143 $ 542,368 $ 3,222,841 December 31, 2017 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 $ 5,432 $ 664 $ 172 $ 14,952 $ 588 $ 1,720 $ 96 $ — $ 23,624 $ 896 $ 75 $ 24,595 Charge-offs (4 ) — — (184 ) (104 ) (73 ) — — (365 ) — (37 ) (402 ) Recoveries 70 — — 277 97 79 — — 523 — 33 556 Provisions (credit) (302 ) (161 ) 438 2,329 (459 ) (453 ) (2 ) — 1,390 55 (34 ) 1,411 Ending Balance $ 5,196 $ 503 $ 610 $ 17,374 $ 122 $ 1,273 $ 94 $ — $ 25,172 $ 951 $ 37 $ 26,160 Ending balance: individually evaluated for impairment $ — $ 38 $ — $ — $ 4 $ 3 $ — $ — $ 45 $ — $ 37 $ 82 Ending balance: collectively evaluated for impairment $ 5,196 $ 465 $ 610 $ 17,374 $ 118 $ 1,270 $ 94 $ — $ 25,127 $ 951 $ — $ 26,078 Loans, net: Ending Balance $ 445,781 $ 101,650 $ 34,620 $ 1,739,220 $ 67,679 $ 34,893 $ 1,432 $ — $ 2,425,275 $ 22,741 $ 692,803 $ 3,140,819 Ending balance: individually evaluated for impairment $ 16,008 $ 1,996 $ — $ 1,310 $ 69 $ 159 $ — $ — $ 19,542 $ — $ 1,543 $ 21,085 Ending balance: collectively evaluated for impairment $ 429,773 $ 99,654 $ 34,620 $ 1,737,910 $ 67,610 $ 34,734 $ 1,432 $ — $ 2,405,733 $ 22,741 $ 691,260 $ 3,119,734
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, 2018 and 2017 (in thousands): At December 31, 2018 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 $ 170,832 $ 1,756,882 $ 78,917 $ 409,155 $ 54,912 $ 34,808 $ 26,613 $ 80,077 $ 43,640 $ 1,520 $ 2,657,356 Special Mention — 613 395 1,137 747 — — 27 430 — 3,349 Substandard — 5,619 — 10,256 1,406 560 — 211 120 — 18,172 Originated loans held-for-investment, net $ 170,832 $ 1,763,114 $ 79,312 $ 420,548 $ 57,065 $ 35,368 $ 26,613 $ 80,315 $ 44,190 $ 1,520 $ 2,678,877 At December 31, 2017 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 $ 131,792 $ 1,603,947 $ 84,620 $ 346,857 $ 60,400 $ 38,504 $ 34,620 $ 67,426 $ 34,141 $ 1,432 $ 2,403,739 Special Mention — 1,897 410 2,170 683 — — 28 571 — 5,759 Substandard — 1,584 — 11,724 1,470 593 — 225 181 — 15,777 Originated loans held-for-investment, net $ 131,792 $ 1,607,428 $ 85,030 $ 360,751 $ 62,553 $ 39,097 $ 34,620 $ 67,679 $ 34,893 $ 1,432 $ 2,425,275
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, 2018 and 2017 (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, 2018 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 $ — $ 287 $ 2,588 $ 2,875 $ — $ 2,875 Total commercial — 287 2,588 2,875 — 2,875 One-to-four family residential LTV < 60% Substandard — 432 77 509 — 509 LTV => 60% Substandard — 32 — 32 — 32 Total one-to-four family residential — 464 77 541 — 541 Home equity and lines of credit Substandard 75 — — 75 — 75 Total home equity and lines of credit 75 — — 75 — 75 Commercial and industrial loans Substandard — — 25 25 — 25 Total commercial and industrial loans — — 25 25 — 25 Total non-performing loans held-for-investment, originated 75 751 2,690 3,516 — 3,516 Loans acquired: Real Estate Loans: Commercial LTV < 35% Substandard 87 — 194 281 — 281 LTV => 35% Substandard — 764 3,371 4,135 — 4,135 Total commercial 87 764 3,565 4,416 — 4,416 One-to-four family residential LTV < 60% Substandard — 199 169 368 6 374 LTV => 60% Substandard 126 — 93 219 27 246 Total one-to-four family residential 126 199 262 587 33 620 Multifamily LTV < 35% Substandard 152 — — 152 — 152 LTV => 35% Substandard — 414 — 414 — 414 Total multifamily 152 414 — 566 — 566 Home equity and lines of credit Substandard — — 77 77 — 77 Total home equity and lines of credit — — 77 77 — 77 Total non-performing loans acquired 365 1,377 3,904 5,646 33 5,679 Total non-performing loans $ 440 $ 2,128 $ 6,594 $ 9,162 $ 33 $ 9,195 At December 31, 2017 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 $ 432 $ 314 $ 2,305 $ 3,051 $ — $ 3,051 Total commercial 432 314 2,305 3,051 — 3,051 One-to-four family residential LTV < 60% Substandard — 206 328 534 — 534 LTV => 60% Substandard — — 39 39 — 39 Total one-to-four family residential — 206 367 573 — 573 Home equity and lines of credit Substandard 79 — — 79 — 79 Total home equity and lines of credit 79 — — 79 — 79 Commercial and industrial loans Substandard — — 72 72 — 72 Total commercial and industrial loans — — 72 72 — 72 Total non-performing loans held-for-investment, originated 511 520 2,744 3,775 — 3,775 Loans acquired: Real estate loans: Commercial LTV < 35% Substandard — — 205 205 — 205 LTV => 35% Substandard — 773 58 831 — 831 Total commercial — 773 263 1,036 — 1,036 One-to-four family residential LTV < 60% Substandard — 201 — 201 27 228 Total one-to-four family residential — 201 — 201 27 228 Multifamily LTV =>35% Substandard — 417 — 417 — 417 Total multifamily — 417 — 417 — 417 Home equity and lines of credit Substandard — 28 49 77 — 77 Total home equity and lines of credit — 28 49 77 — 77 Commercial and industrial Substandard — — 2 2 — 2 Total commercial and industrial loans — — 2 2 — 2 Other Pass — — — — 1 1 Total other — — — — 1 1 Total non-performing loans acquired — 1,419 314 1,733 28 1,761 Total non-performing loans $ 511 $ 1,939 $ 3,058 $ 5,508 $ 28 $ 5,536
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, 2018 and 2017 (in thousands): December 31, 2018 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 $ 78,699 $ 218 $ 78,917 $ — $ 78,917 Special Mention — 395 395 — 395 Total 78,699 613 79,312 — 79,312 LTV => 35% Pass 408,830 325 409,155 — 409,155 Special Mention 1,137 — 1,137 — 1,137 Substandard 7,381 — 7,381 2,875 10,256 Total 417,348 325 417,673 2,875 420,548 Total commercial 496,047 938 496,985 2,875 499,860 One-to-four family residential LTV < 60% Pass 54,576 336 54,912 — 54,912 Special Mention — 747 747 — 747 Substandard 896 — 896 510 1,406 Total 55,472 1,083 56,555 510 57,065 LTV => 60% Pass 34,576 232 34,808 — 34,808 Substandard 528 — 528 32 560 Total 35,104 232 35,336 32 35,368 Total one-to-four family residential 90,576 1,315 91,891 542 92,433 Construction and land Pass 26,613 — 26,613 — 26,613 Total construction and land 26,613 — 26,613 — 26,613 Multifamily LTV < 35% Pass 170,534 298 170,832 — 170,832 Total 170,534 298 170,832 — 170,832 LTV= > 35% Pass 1,756,443 439 1,756,882 — 1,756,882 Special Mention 613 — 613 — 613 Substandard 4,390 1,229 5,619 — 5,619 Total 1,761,446 1,668 1,763,114 — 1,763,114 Total multifamily 1,931,980 1,966 1,933,946 — 1,933,946 Home equity and lines of credit Pass 80,077 — 80,077 — 80,077 Special Mention 27 — 27 — 27 Substandard 137 — 137 74 211 Total home equity and lines of credit 80,241 — 80,241 74 80,315 Commercial and industrial loans Pass 43,640 — 43,640 — 43,640 Special Mention 430 — 430 — 430 Substandard 95 — 95 25 120 Total commercial and industrial loans 44,165 — 44,165 25 44,190 Other loans Pass 1,518 2 1,520 — 1,520 Total other loans 1,518 2 1,520 — 1,520 December 31, 2018 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Total originated loans held-for-investment 2,671,140 4,221 2,675,361 3,516 2,678,877 Acquired loans: One-to-four family residential LTV < 60% Pass 202,471 2,799 205,270 — 205,270 Special Mention 415 — 415 — 415 Substandard 62 6 68 374 442 Total 202,948 2,805 205,753 374 206,127 LTV => 60% Pass 19,504 — 19,504 — 19,504 Substandard — — — 246 246 Total 19,504 — 19,504 246 19,750 Total one-to-four family residential 222,452 2,805 225,257 620 225,877 Commercial LTV < 35% Pass 41,071 — 41,071 — 41,071 Special Mention 1,079 — 1,079 — 1,079 Substandard 1,185 151 1,336 281 1,617 Total 43,335 151 43,486 281 43,767 LTV => 35% Pass 73,986 749 74,735 — 74,735 Special Mention 4,315 128 4,443 — 4,443 Substandard 5,772 411 6,183 4,135 10,318 Total 84,073 1,288 85,361 4,135 89,496 Total commercial 127,408 1,439 128,847 4,416 133,263 Construction and land Pass 12,003 — 12,003 — 12,003 Total construction and land 12,003 — 12,003 — 12,003 Multifamily LTV < 35% Pass 137,141 — 137,141 — 137,141 Special Mention — 52 52 — 52 Substandard — — — 152 152 Total 137,141 52 137,193 152 137,345 LTV => 35% Pass 7,726 — 7,726 — 7,726 Substandard — — — 414 414 Total 7,726 — 7,726 414 8,140 Total multifamily 144,867 52 144,919 566 145,485 Home equity and lines of credit Pass 17,427 — 17,427 — 17,427 Substandard 79 — 79 77 156 Total home equity and lines of credit 17,506 — 17,506 77 17,583 Commercial and industrial Pass 11,888 45 11,933 — 11,933 Total commercial and industrial 11,888 45 11,933 — 11,933 Other 6 — 6 — 6 Total loans acquired 536,130 4,341 540,471 5,679 546,150 $ 3,207,270 $ 8,562 $ 3,215,832 $ 9,195 $ 3,225,027 December 31, 2017 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 $ 84,620 $ — $ 84,620 $ — $ 84,620 Special Mention — 410 410 — 410 Total 84,620 410 85,030 — 85,030 LTV => 35% Pass 346,229 628 346,857 — 346,857 Special Mention 832 1,338 2,170 — 2,170 Substandard 7,675 998 8,673 3,051 11,724 Total 354,736 2,964 357,700 3,051 360,751 Total commercial 439,356 3,374 442,730 3,051 445,781 One-to-four family residential LTV < 60% Pass 57,907 2,493 60,400 — 60,400 Special Mention — 683 683 — 683 Substandard 322 614 936 534 1,470 Total 58,229 3,790 62,019 534 62,553 LTV => 60% Pass 38,504 — 38,504 — 38,504 Substandard 554 — 554 39 593 Total 39,058 — 39,058 39 39,097 Total one-to-four family residential 97,287 3,790 101,077 573 101,650 Construction and land Pass 34,614 6 34,620 — 34,620 Total construction and land 34,614 6 34,620 — 34,620 Multifamily LTV < 35% Pass 131,488 304 131,792 — 131,792 Total 131,488 304 131,792 — 131,792 LTV => 35% Pass 1,603,714 233 1,603,947 — 1,603,947 Special Mention 638 1,259 1,897 — 1,897 Substandard 83 1,501 1,584 — 1,584 Total 1,604,435 2,993 1,607,428 — 1,607,428 Total multifamily 1,735,923 3,297 1,739,220 — 1,739,220 Home equity and lines of credit Pass 67,426 — 67,426 — 67,426 Special Mention 28 — 28 — 28 Substandard 146 — 146 79 225 Total home equity and lines of credit 67,600 — 67,600 79 67,679 Commercial and industrial loans Pass 34,003 138 34,141 — 34,141 Special Mention 547 24 571 — 571 Substandard 109 — 109 72 181 Total Commercial and industrial loans 34,659 162 34,821 72 34,893 Other loans Pass 1,403 29 1,432 — 1,432 Total other loans 1,403 29 1,432 — 1,432 Total originated loans held-for-investment 2,410,842 10,658 2,421,500 3,775 2,425,275 December 31, 2017 Performing (Accruing) Loans 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Loans acquired: One-to-four family residential LTV < 60% Pass 250,149 224 250,373 — 250,373 Special Mention 455 — 455 — 455 Substandard 417 150 567 228 795 Total 251,021 374 251,395 228 251,623 LTV => 60% Pass 23,295 — 23,295 — 23,295 Substandard 135 — 135 — 135 Total 23,430 — 23,430 — 23,430 Total one-to-four family residential 274,451 374 274,825 228 275,053 Commercial LTV < 35% Pass 50,035 70 50,105 — 50,105 Special Mention 91 — 91 — 91 Substandard — 181 181 205 386 Total 50,126 251 50,377 205 50,582 LTV => 35% Pass 108,125 158 108,283 — 108,283 Special Mention — 133 133 — 133 Substandard 3,703 430 4,133 831 4,964 Total 111,828 721 112,549 831 113,380 Total commercial 161,954 972 162,926 1,036 163,962 Construction and land Substandard 17,201 — 17,201 — 17,201 Total construction and land 17,201 — 17,201 — 17,201 Multifamily LTV < 35% Pass 189,551 — 189,551 — 189,551 Special Mention 78 — 78 — 78 Substandard 153 — 153 — 153 Total 189,782 — 189,782 — 189,782 LTV => 35% Pass 8,950 — 8,950 — 8,950 Special Mention — — — 417 417 Total 8,950 — 8,950 417 9,367 Total multifamily 198,732 — 198,732 417 199,149 Home equity and lines of credit Pass 20,291 — 20,291 — 20,291 Substandard 87 — 87 77 164 Total home equity and lines of credit 20,378 — 20,378 77 20,455 Commercial and industrial loans Pass 16,904 40 16,944 — 16,944 Substandard — — — 2 2 Total Commercial and industrial loans 16,904 40 16,944 2 16,946 Other loans Pass 36 — 36 1 37 Total loans acquired 689,656 1,386 691,042 1,761 692,803 $ 3,100,498 $ 12,044 $ 3,112,542 $ 5,536 $ 3,118,078
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, 2018 , and December 31, 2017 (in thousands): December 31, 2018 December 31, 2017 Average Recorded Investment Interest Income Average Recorded Investment Interest Income With No Allowance Recorded: Real estate loans: Commercial LTV < 35% Substandard $ — $ — $ — $ 45 LTV => 35% Pass 5,218 255 5,516 334 Substandard 10,582 404 12,402 431 One-to-four family residential LTV < 60% Pass 1,403 62 854 56 Substandard 246 12 372 14 One-to-four family residential LTV => 60% Pass 186 7 55 4 Substandard 129 13 289 13 Multifamily LTV < 35% Substandard 152 6 154 6 LTV => 35% Pass 296 16 563 56 Substandard 987 67 — — Home equity and lines of credit Pass 31 2 36 2 Commercial and industrial loans Substandard 100 — 127 — With a Related Allowance Recorded: Real estate loans: Commercial LTV => 35% Pass 880 76 — — Substandard 267 — 404 — One-to-four family residential LTV < 60% Pass 164 165 7 Substandard 733 19 1,264 20 LTV => 60% Pass 54 — 271 19 Substandard — — 152 — Multifamily LTV => 35% Pass — — 778 — Substandard — — 180 — Home equity and lines of credit Pass — — 153 — Substandard 34 2 37 1 Commercial and industrial loans Special Mention 23 1 25 1 Total: Real estate loans: Commercial 16,947 735 18,322 810 One-to-four family residential 2,915 113 3,422 133 Multifamily 1,435 89 1,675 62 Home equity and lines of credit 65 4 226 3 Commercial and industrial loans 123 1 152 1 $ 21,485 $ 942 $ 23,797 $ 1,009 The following table summarizes originated and acquired (subsequent to acquisition) impaired loans as of December 31, 2018 and 2017 (in thousands): At December 31, 2018 December 31, 2017 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 $ — $ — $ 139 $ — LTV => 35% Pass 5,931 6,817 — 6,263 7,150 — Substandard 12,160 15,028 — 9,745 10,560 — One-to-four family residential LTV < 60% Pass 1,532 1,606 — 1,189 1,254 — Substandard 241 241 — 251 251 — LTV => 60% Pass 129 158 — 136 161 — Substandard 126 278 — 135 286 — Multifamily LTV < 35% Substandard 152 152 — 153 153 — LTV => 35% Pass 38 509 — 1,309 1,780 — Substandard 1,229 1,229 — — — — Home Equity Pass 28 28 — 33 33 — Commercial and industrial loans Substandard 52 119 — 135 135 — With a Related Allowance Recorded: Real estate loans: One-to-four family residential LTV < 60% Pass — — — 411 411 (7 ) Substandard 657 657 (18 ) 997 997 (49 ) LTV => 60% Pass — — — 268 268 (19 ) Home equity and lines of credit Substandard 33 33 (5 ) 36 36 (4 ) Commercial and industrial loans Special Mention 21 21 (3 ) 24 24 (3 ) Total: Real estate loans: Commercial 18,091 21,984 — 16,008 17,849 — One-to-four family residential 2,685 2,940 (18 ) 3,387 3,628 (75 ) Multifamily 1,419 1,890 — 1,462 1,933 — Home equity and lines of credit 61 61 (5 ) 69 69 (4 ) Commercial and industrial loans 73 $ 140 (3 ) 159 159 (3 ) $ 22,329 $ 27,015 $ (26 ) $ 21,085 $ 23,638 $ (82 )

Premises and Equipment, Net (Ta

Premises and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Premises And Equipment Less Accumulated Depreciation And Amortization	At December 31, 2018 and 2017 , premises and equipment, less accumulated depreciation and amortization, consists of the following (in thousands): December 31, 2018 2017 At cost: Land $ 4,018 $ 4,018 Buildings and improvements 8,905 8,883 Capital leases 2,600 2,600 Furniture, fixtures, and equipment 24,140 22,677 Leasehold improvements 30,115 28,721 69,778 66,899 Accumulated depreciation and amortization (44,173 ) (41,153 ) Premises and equipment, net $ 25,605 $ 25,746

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Deposit Account Balances	Deposit account balances are summarized as follows (dollars in thousands): As of December 31, 2018 2017 Amount Weighted Average Rate Amount Weighted Average Rate Transaction: Negotiable orders of withdrawal $ 458,012 0.68 % $ 465,140 0.39 % Non-interest bearing checking 395,375 — % 407,267 — % Total transaction 853,387 0.36 % 872,407 0.21 % Savings: Money market 741,939 1.12 % 800,854 0.72 % Savings 594,290 0.90 % 424,789 0.18 % Total savings 1,336,229 1.02 % 1,225,643 0.53 % Certificates of deposit: Under $100,000 599,245 1.91 % 401,063 1.42 % $100,000 or more 497,651 2.01 % 337,866 1.51 % Total certificates of deposit 1,096,896 1.96 % 738,929 1.46 % Total deposits $ 3,286,512 1.16 % $ 2,836,979 0.67 %
Maturities Of Certificates Of Deposit	Scheduled maturities of certificates of deposit are summarized as follows (in thousands): December 31, 2018 2019 $ 841,562 2020 138,277 2021 36,282 2022 46,187 2023 34,588 Thereafter — Total $ 1,096,896
Interest Expense On Deposits	Interest expense on deposits is summarized as follows (in thousands): December 31, 2018 2017 2016 Transaction $ 2,175 $ 1,429 $ 957 Savings and money market 8,878 6,804 6,801 Certificates of deposit 16,688 8,153 6,529 $ 27,741 $ 16,386 $ 14,287

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Summary Of Borrowings	Borrowings consisted of FHLB advances, floating rate advances, obligations under capital leases, and securities sold under agreements to repurchase (repurchase agreements), and are summarized as follows (in thousands): December 31, 2018 2017 Repurchase agreements $ — $ 2,000 Other borrowings: FHLB advances 403,502 464,217 Floating rate advances 5,345 5,033 Obligations under capital leases 44 299 $ 408,891 $ 471,549
Contractual Maturities Repurchase Agreements And FHLB Advances	FHLB advances have contractual maturities as follows (in thousands): December 31, 2018 FHLB Advances 2019 $ 123,502 2020 90,000 2021 70,000 2022 20,000 2023 87,500 Thereafter 12,500 $ 403,502
Summary Of Interest Expense On Borrowings	Interest expense on borrowings is summarized as follows (in thousands): December 31, 2018 2017 2016 Repurchase agreements $ 7 $ 137 $ 569 FHLB advances 8,172 7,390 6,743 Floating rate advances 123 33 27 Obligations under capital leases 7 30 42 $ 8,309 $ 7,590 $ 7,381

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	Income tax expense (benefit) consists of the following (in thousands): December 31, 2018 2017 2016 Federal tax expense (benefit): Current $ 8,540 $ 10,113 $ 14,218 Deferred (742 ) 14,290 (1,260 ) 7,798 24,403 12,958 State and local tax expense (benefit): Current 1,985 1,672 2,506 Deferred (151 ) 903 (1,799 ) 1,834 2,575 707 Total income tax expense $ 9,632 $ 26,978 $ 13,665
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, 2018 , 2017 , and 2016 , is as follows (dollars in thousands): December 31, 2018 2017 2016 Tax expense at statutory rate $ 10,439 $ 18,111 $ 13,928 Applicable statutory federal income tax rate 21 % 35 % 35 % Increase (decrease) in taxes resulting from: State tax, net of federal income tax 1,448 1,674 460 Impact of 2017 federal tax reform — 10,453 — Bank owned life insurance (778 ) (1,885 ) (1,399 ) ESOP fair market value adjustment 196 404 352 Incentive stock options 146 247 299 Uncertain tax position — 132 178 Merger related costs — — 74 Excess tax benefits from employee share based payments (1,939 ) (2,309 ) — Other, net 120 151 (227 ) Income tax expense $ 9,632 $ 26,978 $ 13,665
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, 2018 and 2017 , are as follows (in thousands): December 31, 2018 2017 Deferred tax assets: Allowance for loan losses $ 7,317 $ 6,836 Capitalized leases 13 84 Deferred compensation 3,426 3,474 Accrued salaries 737 2 Postretirement benefits 375 381 Equity awards 3,045 3,582 Unrealized actuarial losses on post-retirement benefits 18 93 Straight-line leases adjustment 1,051 892 Asset retirement obligation 67 65 Reserve for accrued interest receivable 602 712 Reserve for loan commitments 146 124 Employee Stock Ownership Plan 551 497 Other 261 236 Depreciation 2,383 2,116 Fair value adjustments of acquired loans 3,934 4,868 Fair value adjustments of pension benefit obligations 154 154 Unrealized losses on securities 3,575 2,070 Total gross deferred tax assets 27,655 26,186 Deferred tax liabilities: Fair value adjustments of acquired securities 28 35 Fair value adjustments of deposit liabilities 285 358 Deferred loan fees 1,984 1,815 Undistributed earnings related to NSB Realty Trust — 939 Other 33 37 Total gross deferred tax liabilities 2,330 3,184 Net deferred tax asset $ 25,325 $ 23,002
Schedule of Unrecognized Tax Benefits Roll Forward	A reconciliation of the Company’s uncertain tax positions are as follows (in thousands): December 31, 2018 2017 2016 Beginning balance $ 482 $ 459 $ 281 Settlements based on tax positions related to prior years (238 ) (109 ) — Additions based on tax positions related to prior years 286 132 178 Ending balance $ 530 $ 482 $ 459

Retirement Benefits (Tables)

Retirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [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): 2018 2017 2016 Accumulated postretirement benefit obligation beginning of year $ 1,645 $ 1,697 $ 1,950 Service cost 11 11 8 Interest cost 52 57 71 Actuarial (gain) loss (229 ) (8 ) (214 ) Benefits paid (120 ) (112 ) (118 ) Accumulated postretirement benefit obligation end of year 1,359 1,645 1,697 Accrued liability (included in accrued expenses and other liabilities) $ 1,359 $ 1,645 $ 1,697
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, 2018 2017 Net loss $ 20 $ 274 Transition obligation — — Prior service cost — — Loss recognized in accumulated other comprehensive income (loss) $ 20 $ 274
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, 2018 , 2017 , and 2016 (in thousands): December 31, 2018 2017 2016 Service cost $ 11 $ 11 $ 8 Interest cost 52 57 71 Amortization of prior service costs — — 12 Amortization of unrecognized loss 25 28 54 Net postretirement benefit cost included in compensation and employee benefits $ 88 $ 96 $ 145
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: 2018 2017 2016 Assumptions used to determine benefit obligation at period end: Discount rate 4.00 % 3.25 % 3.50 % Rate of increase in compensation 4.00 % 4.00 % 4.00 % Assumptions used to determine net periodic benefit cost for the year: Discount rate 3.25 % 3.50 % 3.75 % 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 2018 2017 2018 2017 Effect on benefits earned and interest cost $ 4 $ 4 $ (3 ) $ (4 ) Effect on accumulated postretirement benefit obligation 109 111 (94 ) (100 ) 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 2018 2017 2016 2018 2017 2016 Aggregate of service and interest components of net periodic cost (benefit) $ 4 $ 4 $ 6 $ (3 ) $ (4 ) $ (5 )

Equity Incentive Plan (Tables)

Equity Incentive Plan (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Valuation Assumptions	The fair value of stock options granted in 2017 and 2016 was estimated utilizing the Black-Scholes option pricing model using the following assumptions: Year Ended December 31, 2017 2016 Grant Date November 1, 2017 September 19, 2017 August 1, 2017 November 16, 2016 Stock options granted 40,000 12,500 45,744 40,000 Risk-free rate of return 2.06 % 1.89 % 1.86 % 1.8 % Volatility 29.22 % 30.06 % 29.46 % 30.07 % Dividend yield 2.37 % 1.98 % 1.91 % 1.74 % Expected life 5.75 5.75 5.75 6.5
Stock Options Outstanding	The following table is a summary of the Company’s non-vested stock options as of December 31, 2018 , 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, 2016 5,328,670 $ 3.41 $ 11.36 5.78 Granted 98,244 4.04 16.73 9.71 Forfeited (247,484 ) 3.93 13.68 — Exercised (558,743 ) 2.41 7.52 — Outstanding- December 31, 2017 4,620,687 3.51 11.82 5.17 Granted — — — — Forfeited (29,378 ) 3.36 11.51 — Exercised (1,339,714 ) 2.49 7.75 — Outstanding - December 31, 2018 3,251,595 3.93 13.51 5.62 Exercisable - December 31, 2018 2,440,884 $ 3.89 $ 13.28 5.45
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, 2018 , and changes therein during the year then ended: Number of Shares Awarded Weighted Average Grant Date Fair Value Non-vested at December 31, 2016 924,002 $ 13.82 Granted 34,500 16.70 Vested (279,660 ) 13.68 Forfeited (92,947 ) 13.92 Non-vested at December 31, 2017 585,895 14.05 Granted 15,000 16.48 Vested (266,973 ) 13.86 Forfeited (4,960 ) 14.18 Non-vested at December 31, 2018 328,962 $ 14.31

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitment And Contingent Liabilities Not Reflected In Consolidated Financial Statements	At December 31, 2018 and 2017 , the following commitment and contingent liabilities existed that are not reflected in the accompanying consolidated financial statements (in thousands): December 31, 2018 2017 Commitments to extend credit $ 39,326 $ 43,611 Unused lines of credit 136,586 98,433 Standby letters of credit 5,352 7,000
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: 2019 $ 44 $ 5,735 2020 — 5,949 2021 — 5,512 2022 — 4,844 2023 — 4,744 Thereafter — 35,260 Total minimum lease payments $ 44 $ 62,044

Regulatory Requirements (Tables

Regulatory Requirements (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 and 2017 , 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, 2018: Common Equity Tier 1 Capital (to risk-weighted assets) $ 592,815 16.00 % $ 166,742 4.50 % $ 240,850 6.50 % Tier 1 Leverage 592,815 13.81 171,663 4.00 214,579 5.00 Tier I capital (to risk-weighted assets) 592,815 16.00 222,323 6.00 296,430 8.00 Total capital (to risk-weighted assets) 620,863 16.76 296,430 8.00 370,538 10.00 As of December 31, 2017: Common Equity Tier 1 Capital (to risk-weighted assets) $ 559,717 16.70 % $ 150,862 4.50 % $ 217,912 6.50 % Tier 1 Leverage 559,717 14.15 158,220 4.00 197,775 5.00 Tier I capital (to risk-weighted assets) 559,717 16.70 201,150 6.00 268,200 8.00 Total capital (to risk-weighted assets) 586,361 17.49 268,200 8.00 335,250 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, 2018 and 2017 , for classification as well-capitalized 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, 2018: Common Equity Tier 1 Capital (to risk-weighted assets) $ 636,141 17.17 % $ 166,717 4.50 % $ 240,814 6.50 % Tier 1 Leverage 636,141 14.82 171,724 4.00 214,656 5.00 Tier I capital (to risk-weighted assets) 636,141 17.17 222,290 6.00 296,386 8.00 Total capital (to risk-weighted assets) 664,190 17.93 296,386 8.00 370,483 10.00 As of December 31, 2017: Common Equity Tier 1 Capital (to risk-weighted assets) $ 604,208 18.02 % $ 150,917 4.50 % $ 217,991 6.50 % Tier 1 Leverage 604,208 15.27 158,254 4.00 197,818 5.00 Tier I capital (to risk-weighted assets) 604,208 18.02 201,222 6.00 268,296 8.00 Total capital (to risk-weighted assets) 630,853 18.81 268,296 8.00 335,370 10.00

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 and 2017 , 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, 2018 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: Debt securities available-for-sale: Mortgage-backed securities Pass-through certificates: GSE $ 314,788 $ — $ 314,788 $ — REMICs: GSE 250,163 — 250,163 — Non-GSE 58 — 58 — 565,009 — 565,009 — Other debt securities Municipal bonds 273 — 273 Corporate bonds 242,749 — 242,749 — 243,022 — 243,022 — Total debt securities available-for-sale 808,031 — 808,031 — Trading securities 8,968 8,968 — — Equity securities 237 237 — — Total 817,236 9,205 808,031 — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 4,847 $ — $ — $ 4,847 One-to-four family residential mortgage 765 — — 765 Multifamily 39 — — 39 Home equity and lines of credit 28 — — 28 Total impaired real estate loans 5,679 — — 5,679 Commercial and industrial loans 18 — — 18 Total $ 5,697 $ — $ — $ 5,697 Fair Value Measurements at December 31, 2017 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: Debt securities available-for-sale: Mortgage-backed securities Pass-through certificate GSE $ 178,295 $ — $ 178,295 $ — REMICs: 266,929 266,929 — GSE Non-GSE 79 — 79 — 445,303 — 445,303 — Other debt securities Municipal Bonds 349 — 349 — Corporate bonds 68,130 — 68,130 — 68,479 — 68,479 — Total debt securities available-for sale 513,782 — 513,782 — Trading securities 9,597 9,597 — — Equity securities - mutual funds 323 323 — — Total $ 523,702 $ 9,920 $ 513,782 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 4,645 $ — $ — $ 4,645 One-to-four family residential mortgage 1,735 — — 1,735 Multifamily 51 — — 51 Home equity and lines of credit 31 — — 31 Total impaired real estate loans 6,462 — — 6,462 Commercial and industrial loans 21 — — 21 Other real estate owned 850 — — 850 Total $ 7,333 $ — $ — $ 7,333
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, 2017 : Fair Value Valuation Methodology Unobservable Inputs Range of Inputs (in thousands) Impaired loans $ 6,483 Appraisals Discount for costs to sell 7.0% Discount for quick sale 10.0% Discounted cash flows Interest rates 3.13% - 6.50% Other real estate owned $ 850 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, 2018 : Fair Value Valuation Methodology Unobservable Inputs Range of Inputs (in thousands) Impaired loans $ 5,697 Appraisals Discount for costs to sell 7.0% Discount for quick sale 10.0% Discounted cash flows Interest rates 4.13% - 6.25% Other real estate owned $ — 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, 2018 and 2017 , are presented in the following table (in thousands): December 31, 2018 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 77,762 $ 77,762 $ — $ — $ 77,762 Trading securities 8,968 8,968 — — 8,968 Debt securities available-for-sale 808,031 323 807,708 — 808,031 Debt securities held-to-maturity 9,505 — 9,249 — 9,249 Equity securities (1) 237 237 — — 237 FHLB of New York stock, at cost 22,517 — 22,517 — 22,517 Net loans held-for-investment 3,217,673 — — 3,236,136 3,236,136 Financial liabilities: Deposits $ 3,286,512 $ — $ 3,291,085 $ — $ 3,291,085 Other borrowings 408,891 — 403,476 — 403,476 Advance payments by borrowers 18,007 — 18,007 — 18,007 December 31, 2017 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 57,839 $ 57,839 $ — $ — $ 57,839 Trading securities 9,597 9,597 — — 9,597 Debt securities available-for-sale 513,782 — 513,782 — 513,782 Debt securities held-to-maturity 9,931 — 9,892 — 9,892 Equity securities (1) 323 323 — — 323 FHLB of New York stock, at cost 25,046 — 25,046 — 25,046 Net loans held-for-investment 3,114,659 — — 3,157,829 3,157,829 Financial liabilities: Deposits $ 2,836,979 $ — $ 2,839,666 $ — $ 2,839,666 Repurchase agreements and other borrowings 471,549 — 466,625 — 466,625 Advance payments by borrowers 14,798 — 14,798 — 14,798 (1) Excludes $1.0 million of investments measured at net asset value at December 31, 2018 and 2017, which have not been classified in the fair value hierarchy.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
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 and per share data): December 31, 2018 2017 2016 Net income available to common stockholders $ 40,079 $ 24,768 $ 26,130 Weighted average shares outstanding-basic 46,319,760 45,325,445 44,374,389 Effect of non-vested restricted stock and stock options outstanding 787,673 1,550,285 1,343,498 Weighted average shares outstanding-diluted 47,107,433 46,875,730 45,717,887 Earnings per share-basic $ 0.87 $ 0.55 $ 0.59 Earnings per share-diluted $ 0.85 $ 0.53 $ 0.57 Anti-dilutive shares 765,792 334,927 777,733

Parent-only Financial Informa_2

Parent-only Financial Information (Tables) - Parent Company	12 Months Ended
	Dec. 31, 2018
Condensed Balance Sheets	Northfield Bancorp, Inc. Condensed Balance Sheets December 31, 2018 2017 (in thousands) Assets Cash in Northfield Bank $ 21,884 $ 20,080 Interest-earning deposits in other financial institutions 21 21 Investment in Northfield Bank 623,113 594,385 ESOP loan receivable 22,962 24,021 Other assets 120 1,185 Total assets $ 668,100 $ 639,692 Liabilities and Stockholders' Equity Total liabilities $ 1,661 $ 815 Total stockholders' equity 666,439 638,877 Total liabilities and stockholders' equity $ 668,100 $ 639,692
Condensed Statements of Comprehensive Income (Loss)	Northfield Bancorp, Inc. Condensed Statements of Comprehensive Income Years Ended December 31, 2018 2017 2016 (in thousands) Interest on ESOP loan $ 1,081 $ 939 $ 913 Interest income on deposit in Northfield Bank 38 31 31 (Losses) gains on securities, net (6 ) 5 4 Undistributed earnings of Northfield Bank 40,092 24,887 26,303 Total income 41,205 25,862 27,251 Other expenses 890 872 936 Income tax expense 236 222 185 Total expense 1,126 1,094 1,121 Net income $ 40,079 $ 24,768 $ 26,130 Comprehensive income: Net income $ 40,079 $ 24,768 $ 26,130 Other comprehensive loss, net of tax (3,696 ) (227 ) (1,346 ) Comprehensive income $ 36,383 $ 24,541 $ 24,784
Condensed Statements of Cash Flows	Northfield Bancorp, Inc. Condensed Statements of Cash Flows December 31, 2018 2017 2016 (in thousands) Cash flows from operating activities Net income $ 40,079 $ 24,768 $ 26,130 Adjustments to reconcile net income to net cash provided by operating activities: Decrease (increase) in other assets 3 (2,008 ) (1,994 ) Losses (gains) on securities, net 6 (5 ) (4 ) Increase (decrease) in other liabilities 846 (980 ) 1,238 Undistributed earnings of Northfield Bank (40,092 ) (24,887 ) (26,303 ) Net cash provided by (used in) operating activities 842 (3,112 ) (933 ) Cash flows from investing activities Cash consideration paid for business acquisition — — (13,644 ) Dividends from Northfield Bank 16,493 28,763 14,700 Net cash provided by investing activities 16,493 28,763 1,056 Cash flows from financing activities Principal payments on ESOP loan receivable 1,059 1,022 969 Purchase of treasury stock (5 ) — (2,201 ) Dividends paid (18,673 ) (15,646 ) (14,074 ) Exercise of stock options 2,088 100 120 Additional tax benefit on stock awards — — 1,512 Net cash used in financing activities (15,531 ) (14,524 ) (13,674 ) Net increase (decrease) in cash and cash equivalents 1,804 11,127 (13,551 ) Cash and cash equivalents at beginning of year 20,101 8,974 22,525 Cash and cash equivalents at end of year $ 21,905 $ 20,101 $ 8,974

Selected Quarterly Financial _2

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Parent Company
Selected Quarterly Financial Data (Unaudited)	The following tables are a summary of certain quarterly financial data for the years ended December 31, 2018 and 2017 : 2018 Quarter Ended March 31 June 30 September 30 December 31 (Dollars in thousands, except per share data) Selected Operating Data: Interest income $ 34,682 $ 35,935 $ 37,727 $ 38,948 Interest expense 7,138 8,165 9,803 10,944 Net interest income 27,544 27,770 27,924 28,004 Provision for loan losses 34 670 1,304 607 Net interest income after provision for loan losses 27,510 27,100 26,620 27,397 Other income 2,405 2,445 2,637 640 Other expenses 17,126 17,040 17,100 15,777 Income before income tax expense 12,789 12,505 12,157 12,260 Income tax expense 2,344 1,893 3,081 2,314 Net income $ 10,445 $ 10,612 $ 9,076 $ 9,946 Net income per basic common share $ 0.23 $ 0.23 $ 0.19 $ 0.21 Net income per diluted common share $ 0.22 $ 0.23 $ 0.19 $ 0.21 2017 Quarter Ended March 31 June 30 September 30 December 31 (Dollars in thousands, except per share data) Selected Operating Data: Interest income $ 32,069 $ 32,660 $ 33,525 $ 34,615 Interest expense 5,392 5,751 6,173 6,660 Net interest income 26,677 26,909 27,352 27,955 Provision (recoveries) for loan losses 372 511 488 40 Net interest income after provision for loan losses 26,305 26,398 26,864 27,915 Other income 4,147 2,437 2,615 2,443 Other expenses 17,544 16,618 16,828 16,388 Income before income tax expense 12,908 12,217 12,651 13,970 Income tax expense 2,960 3,807 4,525 15,686 Net income (loss) $ 9,948 $ 8,410 $ 8,126 $ (1,716 ) Net income (loss) per basic common share $ 0.22 $ 0.19 $ 0.18 $ (0.04 ) Net income (loss) per diluted common share $ 0.21 $ 0.18 $ 0.17 $ (0.04 )

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Schedule of Non-Interest Income	The following table summarizes non-interest income for the periods indicated (in thousands): December 31, 2018 2017 2016 Fees and service charges for customer services: Service charges 3,356 $ 3,320 $ 3,516 ATM and card interchange fees 1,216 1,150 1,130 Investment fees 305 232 288 Total fees and service charges for customer services 4,877 4,702 4,934 Income on bank owned life insurance (1) 3,705 5,386 3,998 (Losses) gains on securities, net (1) (701 ) 1,283 813 Other (1) 246 271 327 Total non-interest income $ 8,127 $ 11,642 $ 10,072 (1) Not within the scope of Topic 606

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2019
Schedule Of Significant Accounting Policies [Line Items]
Minimum amount of non-accrual loans individually evaluated for impairment	$ 22,329	$ 21,085
Delinquent status classification term	90 days
Threshold of membership investment component, percentage	0.125%
Threshold of membership investment component	$ 1
Activity based investment component as a percentage of outstanding advances	4.50%
Goodwill	$ 38,411	$ 38,411
ESOP repayment period (years)	30 years
Effect of non-vested restricted stock and stock options outstanding	787,673	1,550,285	1,343,498
Minimum
Schedule Of Significant Accounting Policies [Line Items]
Minimum amount of non-accrual loans individually evaluated for impairment	$ 500
Accounting Standards Update 2018-02
Schedule Of Significant Accounting Policies [Line Items]
Reclassification of tax effects resulting from the adoption of ASU No. 2018-02	0
Accounting Standards Update 2018-02 | Retained Earnings
Schedule Of Significant Accounting Policies [Line Items]
Reclassification of tax effects resulting from the adoption of ASU No. 2018-02	$ 892	$ 892
ASU 2016-02 | Subsequent Event
Schedule Of Significant Accounting Policies [Line Items]
Right-of-use asset				$ 43,400
Operating lease liability				$ 47,200
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

Business Combination - Narrativ

Business Combination - Narrative (Details) - Hopewell Valley Community Bank $ / shares in Units, $ in Thousands	Jan. 08, 2016USD ($)branch$ / sharesshares
Business Acquisition [Line Items]
Assets acquired	$ 508,455
Loans acquired	342,566
Deposits acquired	$ 456,203
Number of branch offices acquired | branch	9
Total consideration transferred	$ 55,400
Cash consideration	$ 13,700
Core Deposits
Business Acquisition [Line Items]
Estimated useful life	10 years
Common Stock
Business Acquisition [Line Items]
Consideration transferred, common stock (shares) | shares	2,707,381
Consideration transferred, common stock	$ 41,700
Closing price (usd per share) | $ / shares	$ 15.41

Business Combination - Fair Val

Business Combination - Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Jan. 08, 2016
ASSETS ACQUIRED:
Goodwill	$ 38,411	$ 38,411
Hopewell Valley Community Bank
ASSETS ACQUIRED:
Cash and cash equivalents, net			$ 55,479
Securities available for sale			61,633
Loans			342,566
Accrued interest receivable			1,452
Bank-owned life insurance			11,269
Premises and equipment			5,926
Federal Home Loan Bank of New York stock, at cost			476
Goodwill			22,252
Other intangible assets			2,013
Other assets			5,389
Total assets acquired			508,455
LIABILITIES ASSUMED:
Deposits			456,203
Other borrowings			2,213
Other liabilities			8,318
Total liabilities assumed			466,734
Net assets acquired			$ 41,721

Debt Securities Available-for_3

Debt Securities Available-for-Sale - Comparative Summary Of Mortgage-Backed Securities And Other Securities Available-for-Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 820,801	$ 521,171
Gross unrealized gains	967	2,123
Gross unrealized losses	13,737	9,512
Estimated fair value	808,031	513,782
Pass-through certificates | GSE
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	317,530	179,320
Gross unrealized gains	800	1,429
Gross unrealized losses	3,542	2,454
Estimated fair value	314,788	178,295
REMICs
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	575,639	452,901
Gross unrealized gains	892	1,716
Gross unrealized losses	11,522	9,314
Estimated fair value	565,009	445,303
REMICs | GSE
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	258,050	273,501
Gross unrealized gains	92	287
Gross unrealized losses	7,979	6,859
Estimated fair value	250,163	266,929
REMICs | Non-GSE
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	59	80
Gross unrealized gains	0	0
Gross unrealized losses	1	1
Estimated fair value	58	79
Other debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	245,162	68,270
Gross unrealized gains	75	407
Gross unrealized losses	2,215	198
Estimated fair value	243,022	68,479
Other debt securities | Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	270	343
Gross unrealized gains	3	6
Gross unrealized losses	0	0
Estimated fair value	273	349
Other debt securities | Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	244,892	67,927
Gross unrealized gains	72	401
Gross unrealized losses	2,215	198
Estimated fair value	$ 242,749	$ 68,130

Debt Securities Available-for_4

Debt 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, 2018	Dec. 31, 2017
Amortized cost	$ 820,801	$ 521,171
Estimated fair value	808,031	$ 513,782
Other Than Mortgage Backed Securities
Amortized cost, Due in one year or less	33,073
Amortized cost, Due after one year through five years	202,193
Amortized cost, Due after five years through ten years	9,896
Amortized cost	245,162
Estimated fair value, Due in one year or less	33,007
Estimated fair value, Due after one year through five years	200,430
Estimated fair value, Due after five years through ten years	9,585
Estimated fair value	$ 243,022

Debt Securities Available-for_5

Debt Securities Available-for-Sale - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)security	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Schedule of Available-for-sale Securities [Line Items]
Carrying value of securities available-for-sale | $	$ 492,400	$ 371,100
Gross proceeds on sales of securities | $	32,115	4,975	$ 44,582
Gross realized gains | $	183	173	493
Gross realized losses | $	5	4	187
Net gains (losses) on trading securities portfolio | $	$ (879)	$ 1,100	$ 507
Continuous Unrealized Loss Position Less Than 12 Months | REMIC
Schedule of Available-for-sale Securities [Line Items]
Number of securities	8
GSE | Continuous Unrealized Loss Position 12 Months Or Longer
Schedule of Available-for-sale Securities [Line Items]
Number of securities	49
GSE | Continuous Unrealized Loss Position 12 Months Or Longer | REMIC
Schedule of Available-for-sale Securities [Line Items]
Number of securities	47
GSE | Continuous Unrealized Loss Position Less Than 12 Months | Pass-through certificates
Schedule of Available-for-sale Securities [Line Items]
Number of securities	25
Non-GSE | Continuous Unrealized Loss Position 12 Months Or Longer | REMIC
Schedule of Available-for-sale Securities [Line Items]
Number of securities	1
Corporate bonds | Continuous Unrealized Loss Position Less Than 12 Months | REMIC
Schedule of Available-for-sale Securities [Line Items]
Number of securities	30
Municipal bonds | Continuous Unrealized Loss Position Less Than 12 Months | REMIC
Schedule of Available-for-sale Securities [Line Items]
Number of securities	5

Debt Securities Available-for_6

Debt Securities Available-for-Sale - Gross Unrealized Losses On Mortgage-Backed Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, Less than 12 months	$ 2,376	$ 1,433
Estimated fair value, Less than 12 months	302,921	163,581
Unrealized losses, 12 months or more	11,361	8,079
Estimated fair value, 12 months or more	307,354	231,106
Unrealized losses, Total	13,737	9,512
Estimated fair value, Total	610,275	394,687
Pass-through certificates | GSE
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, Less than 12 months	404	439
Estimated fair value, Less than 12 months	82,781	48,931
Unrealized losses, 12 months or more	3,138	2,015
Estimated fair value, 12 months or more	100,109	76,113
Unrealized losses, Total	3,542	2,454
Estimated fair value, Total	182,890	125,044
REMICs | GSE
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, Less than 12 months	269	933
Estimated fair value, Less than 12 months	46,921	103,644
Unrealized losses, 12 months or more	7,710	5,926
Estimated fair value, 12 months or more	181,512	139,830
Unrealized losses, Total	7,979	6,859
Estimated fair value, Total	228,433	243,474
REMICs | Non-GSE
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, Less than 12 months	0	0
Estimated fair value, Less than 12 months	0	0
Unrealized losses, 12 months or more	1	1
Estimated fair value, 12 months or more	58	79
Unrealized losses, Total	1	1
Estimated fair value, Total	58	79
Other debt securities | Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, Less than 12 months	1,703	61
Estimated fair value, Less than 12 months	173,219	11,006
Unrealized losses, 12 months or more	512	137
Estimated fair value, 12 months or more	25,675	15,084
Unrealized losses, Total	2,215	198
Estimated fair value, Total	$ 198,894	$ 26,090

Debt Securities Held-to-Matur_3

Debt Securities Held-to-Maturity - Summary of Mortgage-Backed Securities Held-to-Maturity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 9,505,000	$ 9,931,000
Gross Unrealized Gains	0	17,000
Gross Unrealized Losses	256,000	56,000
Estimated Fair Value	9,249,000	9,892,000
Sales of held-to-maturity securities	0	0	$ 0
Other-than-temporary impairment charges	0	0	$ 0
Held-to-maturity securities pledged to secured repurchase agreements and deposits	6,500,000	9,900,000
Mortgage-Backed Securities, Pass-Through Certificates
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	9,505,000	9,931,000
Gross Unrealized Gains	0	17,000
Gross Unrealized Losses	256,000	56,000
Estimated Fair Value	$ 9,249,000	$ 9,892,000

Debt Securities Held-to-Matur_4

Debt Securities Held-to-Maturity - Unrealized Losses and Estimated Fair Value (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)security	Dec. 31, 2017USD ($)
Unrealized losses
Less than 12 months	$ 34	$ 7
12 months or more	222	49
Total	256	56
Estimated fair value
Less than 12 months	2,133	3,922
12 months or more	7,116	3,735
Total	9,249	7,657
Mortgage-Backed Securities, Pass-Through Certificates
Unrealized losses
Less than 12 months	34	7
12 months or more	222	49
Total	256	56
Estimated fair value
Less than 12 months	2,133	3,922
12 months or more	7,116	3,735
Total	$ 9,249	$ 7,657
Number of held-to-maturity securities in an unrealized loss position, greater than twelve months | security	5
Number of held-to-maturity securities in an unrealized loss position, less than twelve months | security	1

Equity Securities (Details)

Equity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Trading Securities and Other Trading Assets [Line Items]
Equity securities	$ 1,280	$ 1,339
Equity securities without readily determinable fair value	1,000	1,000
Money Market Funds
Schedule of Trading Securities and Other Trading Assets [Line Items]
Equity securities, fair value	237	323
SBA Loan Fund
Schedule of Trading Securities and Other Trading Assets [Line Items]
Equity securities without readily determinable fair value	$ 1,000	$ 1,000

Loans - Net Loans Held-for-Inv

Loans - Net Loans Held-for-Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Loans and Leases Receivable Disclosure [Line Items]
Total commercial and industrial and other loans	$ 45,623	$ 36,258
Loans held-for-investment, net	3,245,170	3,140,819
PCI Loans	20,143	22,741
Allowance for loan losses	(27,497)	(26,160)	$ (24,595)	$ (24,770)
Net loans held-for-investment	3,217,673	3,114,659
Originated loans
Loans and Leases Receivable Disclosure [Line Items]
Deferred loan cost, net	6,892	6,339
Loans held-for-investment, net	2,678,877	2,425,275
Allowance for loan losses	(26,487)	(25,172)	(23,624)
Loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans	546,150	692,803
Loans held-for-investment, net	546,150	692,803
Allowance for loan losses	0	(37)	(75)
Real Estate | Originated loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,626,362	2,382,678
Real Estate | Loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans	534,211	675,820
Real Estate | Multifamily | Originated loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,930,535	1,735,712
Loans held-for-investment, net	1,933,946	1,739,220
Allowance for loan losses	(18,084)	(17,374)	(14,952)
Real Estate | Multifamily | Loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans	145,485	199,149
Real Estate | Commercial mortgage | Originated loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	499,311	445,225
Loans held-for-investment, net	499,860	445,781
Allowance for loan losses	(5,630)	(5,196)	(5,432)
Real Estate | Commercial mortgage | Loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans	133,263	163,962
Real Estate | One-to-four family residential mortgage | Originated loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	91,371	100,942
Loans held-for-investment, net	92,433	101,650
Allowance for loan losses	(342)	(503)	(664)
Real Estate | One-to-four family residential mortgage | Loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans	225,877	275,053
Real Estate | Home equity and lines of credit | Originated loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	78,593	66,254
Loans held-for-investment, net	80,315	67,679
Allowance for loan losses	(291)	(122)	(588)
Real Estate | Home equity and lines of credit | Loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans	17,583	20,455
Real Estate | Construction and land | Originated loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	26,552	34,545
Loans held-for-investment, net	26,613	34,620
Allowance for loan losses	(463)	(610)	(172)
Real Estate | Construction and land | Loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans	12,003	17,201
Commercial and Industrial | Originated loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	44,104	34,828
Loans held-for-investment, net	44,190	34,893
Allowance for loan losses	(1,569)	(1,273)	(1,720)
Commercial and Industrial | Loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans	11,933	16,946
Other | Originated loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,519	1,430
Loans held-for-investment, net	1,520	1,432
Allowance for loan losses	(108)	(94)	$ (96)
Other | Loans acquired
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 6	$ 37

Loans - Narrative, PCI Loans (D

Loans - Narrative, PCI Loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans held for sale	$ 0	$ 0
Purchased credit-impaired (PCI) loans held-for-investment	$ 20,143,000	22,741,000
Purchased credit-impaired (PCI) loans held-for-investment, Federal Deposit Insurance Corporation assisted transaction		$ 22,700,000
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased credit-impaired (PCI) loan percent	27.00%
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased credit-impaired (PCI) loan percent	50.00%

Loans - PCI Loans Acquired from

Loans - PCI Loans Acquired from Hopewell Valley (Details) - Hopewell Valley Community Bank $ in Thousands	Jan. 08, 2016USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest at acquisition	$ 16,580
Contractual cash flows not expected to be collected (non-accretable discount)	(9,929)
Expected cash flows to be collected at acquisition	6,651
Interest component of expected cash flows (accretable discount)	(845)
Fair value of acquired loans	$ 5,806

Loans - Summary Of Accretable Y

Loans - Summary Of Accretable Yield (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at the beginning of year	$ 24,502	$ 24,215
Accretion into interest income	(4,176)	(5,477)
Net reclassification from non-accretable difference	1,520	5,764
Balance at end of year	$ 21,846	$ 24,502

Loans - Activity In The Allowan

Loans - Activity In The Allowance For Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for loan losses:
Beginning Balance	$ 26,160	$ 24,595	$ 24,770
Provision for loan losses	2,615	1,411	635
Recoveries	112	556	194
Charge-offs	(1,390)	(402)	(1,004)
Ending Balance	$ 27,497	$ 26,160	$ 24,595

Loans - Amount of Loans Receiva

Loans - Amount of Loans Receivable Held-for-Investment and Related Allowances Per Loan Portfolio Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for loan losses:
Beginning Balance	$ 26,160	$ 24,595	$ 24,770
Charge-offs	(1,390)	(402)	(1,004)
Recoveries	112	556	194
Provisions (credit)	2,615	1,411	635
Ending Balance	27,497	26,160	24,595
Ending balance: individually evaluated for impairment	26	82
Ending balance: collectively evaluated for impairment	27,471	26,078
Loans, net:
Loans held-for-investment, net	3,245,170	3,140,819
Ending balance: individually evaluated for impairment	22,329	21,085
Ending balance: collectively evaluated for impairment	3,222,841	3,119,734
Originated Loans Total
Allowance for loan losses:
Beginning Balance	25,172	23,624
Charge-offs	(1,389)	(365)
Recoveries	99	523
Provisions (credit)	2,605	1,390
Ending Balance	26,487	25,172	23,624
Ending balance: individually evaluated for impairment	26	45
Ending balance: collectively evaluated for impairment	26,461	25,127
Loans, net:
Loans held-for-investment, net	2,678,877	2,425,275
Ending balance: individually evaluated for impairment	18,547	19,542
Ending balance: collectively evaluated for impairment	2,660,330	2,405,733
PCI
Allowance for loan losses:
Beginning Balance	951	896
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	59	55
Ending Balance	1,010	951	896
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	1,010	951
Loans, net:
Loans held-for-investment, net	20,143	22,741
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	20,143	22,741
Acquired Loans
Allowance for loan losses:
Beginning Balance	37	75
Charge-offs	(1)	(37)
Recoveries	13	33
Provisions (credit)	(49)	(34)
Ending Balance	0	37	75
Ending balance: individually evaluated for impairment	0	37
Ending balance: collectively evaluated for impairment	0	0
Loans, net:
Loans held-for-investment, net	546,150	692,803
Ending balance: individually evaluated for impairment	3,782	1,543
Ending balance: collectively evaluated for impairment	542,368	691,260
Real Estate | Commercial mortgage | Originated Loans Total
Allowance for loan losses:
Beginning Balance	5,196	5,432
Charge-offs	(1,256)	(4)
Recoveries	49	70
Provisions (credit)	1,641	(302)
Ending Balance	5,630	5,196	5,432
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	5,630	5,196
Loans, net:
Loans held-for-investment, net	499,860	445,781
Ending balance: individually evaluated for impairment	15,252	16,008
Ending balance: collectively evaluated for impairment	484,608	429,773
Real Estate | One-to-Four Family | Originated Loans Total
Allowance for loan losses:
Beginning Balance	503	664
Charge-offs	(3)	0
Recoveries	4	0
Provisions (credit)	(162)	(161)
Ending Balance	342	503	664
Ending balance: individually evaluated for impairment	18	38
Ending balance: collectively evaluated for impairment	324	465
Loans, net:
Loans held-for-investment, net	92,433	101,650
Ending balance: individually evaluated for impairment	1,893	1,996
Ending balance: collectively evaluated for impairment	90,540	99,654
Real Estate | Construction and Land | Originated Loans Total
Allowance for loan losses:
Beginning Balance	610	172
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	(147)	438
Ending Balance	463	610	172
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	463	610
Loans, net:
Loans held-for-investment, net	26,613	34,620
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	26,613	34,620
Real Estate | Multifamily | Originated Loans Total
Allowance for loan losses:
Beginning Balance	17,374	14,952
Charge-offs	0	(184)
Recoveries	26	277
Provisions (credit)	684	2,329
Ending Balance	18,084	17,374	14,952
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	18,084	17,374
Loans, net:
Loans held-for-investment, net	1,933,946	1,739,220
Ending balance: individually evaluated for impairment	1,268	1,310
Ending balance: collectively evaluated for impairment	1,932,678	1,737,910
Real Estate | Home Equity and Lines of Credit | Originated Loans Total
Allowance for loan losses:
Beginning Balance	122	588
Charge-offs	(60)	(104)
Recoveries	0	97
Provisions (credit)	229	(459)
Ending Balance	291	122	588
Ending balance: individually evaluated for impairment	5	4
Ending balance: collectively evaluated for impairment	286	118
Loans, net:
Loans held-for-investment, net	80,315	67,679
Ending balance: individually evaluated for impairment	61	69
Ending balance: collectively evaluated for impairment	80,254	67,610
Commercial and Industrial | Originated Loans Total
Allowance for loan losses:
Beginning Balance	1,273	1,720
Charge-offs	(70)	(73)
Recoveries	20	79
Provisions (credit)	346	(453)
Ending Balance	1,569	1,273	1,720
Ending balance: individually evaluated for impairment	3	3
Ending balance: collectively evaluated for impairment	1,566	1,270
Loans, net:
Loans held-for-investment, net	44,190	34,893
Ending balance: individually evaluated for impairment	73	159
Ending balance: collectively evaluated for impairment	44,117	34,734
Other | Originated Loans Total
Allowance for loan losses:
Beginning Balance	94	96
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	14	(2)
Ending Balance	108	94	96
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	108	94
Loans, net:
Loans held-for-investment, net	1,520	1,432
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	1,520	1,432
Unallocated | Originated Loans Total
Allowance for loan losses:
Beginning Balance	0	0
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	0	0
Ending Balance	$ 0	$ 0	$ 0

Loans - Narrative, Loan-to-Valu

Loans - Narrative, Loan-to-Value Ratios (Details)	Dec. 31, 2018
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan to value ratio, less than	35.00%
One-to-four family residential mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan to value ratio, less than	60.00%

Loans - Investment of Originate

Loans - Investment of Originated Loans Held-for-Investment by Loan Type and Credit Quality Indicator (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	$ 2,678,877	$ 2,425,275
Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	2,657,356	2,403,739
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	3,349	5,759
Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	18,172	15,777
Real Estate | Multifamily | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	170,832	131,792
Real Estate | Multifamily | Less Than 35% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	170,832	131,792
Real Estate | Multifamily | Less Than 35% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	0	0
Real Estate | Multifamily | Less Than 35% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	0	0
Real Estate | Multifamily | Equal to or Greater than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	1,763,114	1,607,428
Real Estate | Multifamily | Equal to or Greater than 35% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	1,756,882	1,603,947
Real Estate | Multifamily | Equal to or Greater than 35% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	613	1,897
Real Estate | Multifamily | Equal to or Greater than 35% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	5,619	1,584
Real Estate | Commercial | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	79,312	85,030
Real Estate | Commercial | Less Than 35% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	78,917	84,620
Real Estate | Commercial | Less Than 35% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	395	410
Real Estate | Commercial | Less Than 35% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	0	0
Real Estate | Commercial | Equal to or Greater than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	420,548	360,751
Real Estate | Commercial | Equal to or Greater than 35% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	409,155	346,857
Real Estate | Commercial | Equal to or Greater than 35% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	1,137	2,170
Real Estate | Commercial | Equal to or Greater than 35% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	10,256	11,724
Real Estate | One-to-Four Family | Less Than 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	57,065	62,553
Real Estate | One-to-Four Family | Less Than 60% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	54,912	60,400
Real Estate | One-to-Four Family | Less Than 60% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	747	683
Real Estate | One-to-Four Family | Less Than 60% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	1,406	1,470
Real Estate | One-to-Four Family | Equal to or Greater than 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	35,368	39,097
Real Estate | One-to-Four Family | Equal to or Greater than 60% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	34,808	38,504
Real Estate | One-to-Four Family | Equal to or Greater than 60% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	0	0
Real Estate | One-to-Four Family | Equal to or Greater than 60% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	560	593
Real Estate | Construction and Land
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	26,613	34,620
Real Estate | Construction and Land | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	26,613	34,620
Real Estate | Construction and Land | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	0	0
Real Estate | Construction and Land | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	0	0
Real Estate | Home Equity and Lines of Credit
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	80,315	67,679
Real Estate | Home Equity and Lines of Credit | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	80,077	67,426
Real Estate | Home Equity and Lines of Credit | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	27	28
Real Estate | Home Equity and Lines of Credit | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	211	225
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	44,190	34,893
Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	43,640	34,141
Commercial and Industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	430	571
Commercial and Industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	120	181
Other
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	1,520	1,432
Other | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	1,520	1,432
Other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	0	0
Other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans held-for-investment, net	$ 0	$ 0

Loans - Narrative, Loans (Detai

Loans - Narrative, Loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans not written down by charge-offs	$ 16,600,000	$ 14,500,000
Investment in non accrual loans	$ 9,200,000	5,500,000
Delinquent status classification term	90 days
Impairment of loans	$ 5,900,000	3,100,000
Principal balance of loans on non accrual status	3,200,000	2,400,000
Loans held-for-sale non accrual amount	0	0
Loans past 90 days and still accruing	33,000	$ 28,000
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal balance of loans on non accrual status	$ 500,000

Loans - PCI Loan Pools (Details

Loans - PCI Loan Pools (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
90 Days or More Past Due and Accruing	$ 33	$ 28
Originated loans held-for-investment, net	2,678,877	2,425,275
Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	9,162	5,508
90 Days or More Past Due and Accruing	33	28
Total Non-Performing Loans	9,195	5,536
Non-Performing Loans | Loans held-for-investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	3,516	3,775
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	3,516	3,775
Non-Performing Loans | Loans held-for-investment | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	2,875
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	2,875
Non-Performing Loans | Loans held-for-investment | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	541	573
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	541	573
Non-Performing Loans | Loans held-for-investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	75	79
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	75	79
Non-Performing Loans | Loans held-for-investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		72
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		72
Non-Performing Loans | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	5,646	1,733
90 Days or More Past Due and Accruing	33	28
Total Non-Performing Loans	5,679	1,761
Non-Performing Loans | Loans acquired | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	4,416	1,036
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	4,416	1,036
Non-Performing Loans | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	587	201
90 Days or More Past Due and Accruing	33	27
Total Non-Performing Loans	620	228
Non-Performing Loans | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	566	417
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	566	417
Non-Performing Loans | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	77	77
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	77	77
Non-Performing Loans | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		2
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		2
Non-Performing Loans | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
90 Days or More Past Due and Accruing		1
Total Non-Performing Loans		1
Non-Performing Loans | Pass | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
90 Days or More Past Due and Accruing		1
Total Non-Performing Loans		1
Non-Performing Loans | Substandard | Loans held-for-investment | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	2,875	3,051
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	2,875	3,051
Non-Performing Loans | Substandard | Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	509	534
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	509	534
Non-Performing Loans | Substandard | Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	32	39
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	32	39
Non-Performing Loans | Substandard | Loans held-for-investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	75	79
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	75	79
Non-Performing Loans | Substandard | Loans held-for-investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		72
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		72
Non-Performing Loans | Substandard | Loans acquired | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	281	205
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	281	205
Non-Performing Loans | Substandard | Loans acquired | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	4,135	831
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	4,135	831
Non-Performing Loans | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	368	201
90 Days or More Past Due and Accruing	6	27
Total Non-Performing Loans	374	228
Non-Performing Loans | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	219
90 Days or More Past Due and Accruing	27
Total Non-Performing Loans	246
Non-Performing Loans | Substandard | Loans acquired | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	152
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	152
Non-Performing Loans | Substandard | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	414	417
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	414	417
Non-Performing Loans | Substandard | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	77	77
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	77	77
Non-Performing Loans | Substandard | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		2
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		2
Non-Performing Loans | 0-29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	440	511
Non-Performing Loans | 0-29 Days Past Due | Loans held-for-investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	75	511
Non-Performing Loans | 0-29 Days Past Due | Loans held-for-investment | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 0-29 Days Past Due | Loans held-for-investment | Real Estate | One-to-four family residential mortgage
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 | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	75	79
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
Non-Performing Loans | 0-29 Days Past Due | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	365	0
Non-Performing Loans | 0-29 Days Past Due | Loans acquired | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	87	0
Non-Performing Loans | 0-29 Days Past Due | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	126	0
Non-Performing Loans | 0-29 Days Past Due | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	152	0
Non-Performing Loans | 0-29 Days Past Due | Loans acquired | Real Estate | 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 acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 0-29 Days Past Due | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 0-29 Days Past Due | Pass | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans held-for-investment | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	432
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans held-for-investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	75	79
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans held-for-investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	87	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	126
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	152
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | 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 | Substandard | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	2,128	1,939
Non-Performing Loans | 30-89 Days Past Due | Loans held-for-investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	751	520
Non-Performing Loans | 30-89 Days Past Due | Loans held-for-investment | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	287
Non-Performing Loans | 30-89 Days Past Due | Loans held-for-investment | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	464	206
Non-Performing Loans | 30-89 Days Past Due | Loans held-for-investment | Real Estate | Home equity and lines of credit
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
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 30-89 Days Past Due | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	1,377	1,419
Non-Performing Loans | 30-89 Days Past Due | Loans acquired | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	764	773
Non-Performing Loans | 30-89 Days Past Due | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	199	201
Non-Performing Loans | 30-89 Days Past Due | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	414	417
Non-Performing Loans | 30-89 Days Past Due | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	28
Non-Performing Loans | 30-89 Days Past Due | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 30-89 Days Past Due | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 30-89 Days Past Due | Pass | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans held-for-investment | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	287	314
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	432	206
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	32	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans held-for-investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans held-for-investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	764	773
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	199	201
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	414	417
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	28
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	6,594	3,058
Non-Performing Loans | 90 Days or More Past Due | Loans held-for-investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	2,690	2,744
Non-Performing Loans | 90 Days or More Past Due | Loans held-for-investment | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	2,588
Non-Performing Loans | 90 Days or More Past Due | Loans held-for-investment | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	77	367
Non-Performing Loans | 90 Days or More Past Due | Loans held-for-investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 90 Days or More Past Due | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	3,904	314
Non-Performing Loans | 90 Days or More Past Due | Loans acquired | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	3,565	263
Non-Performing Loans | 90 Days or More Past Due | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	262	0
Non-Performing Loans | 90 Days or More Past Due | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 90 Days or More Past Due | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	77	49
Non-Performing Loans | 90 Days or More Past Due | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		2
Non-Performing Loans | 90 Days or More Past Due | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 90 Days or More Past Due | Pass | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans held-for-investment | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	2,588	2,305
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	77	328
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	39
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans held-for-investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans held-for-investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		72
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	194	205
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	3,371	58
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	169	0
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	93
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0	0
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	77	49
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		2
Non-Performing Loans | Loans held-for-investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	25
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	25
Non-Performing Loans | Substandard | Loans held-for-investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	25
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	25
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
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans held-for-investment | Commercial and Industrial
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
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans held-for-investment | Commercial and Industrial
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
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	25
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans held-for-investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans	25
Non-Performing Loans | Equal to or Greater than 35% LTV | Loans held-for-investment | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		3,051
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		3,051
Non-Performing Loans | Equal to or Greater than 35% LTV | 0-29 Days Past Due | Loans held-for-investment | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		432
Non-Performing Loans | Equal to or Greater than 35% LTV | 30-89 Days Past Due | Loans held-for-investment | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		314
Non-Performing Loans | Equal to or Greater than 35% LTV | 90 Days or More Past Due | Loans held-for-investment | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		2,305
Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	546,150	692,803
Loans acquired | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	133,263	163,962
Loans acquired | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	43,767	50,582
Loans acquired | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	89,496	113,380
Loans acquired | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	225,877	275,053
Loans acquired | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	206,127	251,623
Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	19,750	23,430
Loans acquired | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	145,485
Loans acquired | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	137,345	189,782
Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	8,140	199,149
Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	17,583	20,455
Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	11,933	16,946
Loans acquired | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	6	37
Loans acquired | Pass | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	41,071	50,105
Loans acquired | Pass | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	74,735	108,283
Loans acquired | Pass | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	205,270	250,373
Loans acquired | Pass | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	19,504	23,295
Loans acquired | Pass | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	137,141	189,551
Loans acquired | Pass | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	7,726	8,950
Loans acquired | Pass | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	17,427	20,291
Loans acquired | Pass | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	11,933	16,944
Loans acquired | Special Mention | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,079	91
Loans acquired | Special Mention | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	4,443	133
Loans acquired | Special Mention | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	415	455
Loans acquired | Special Mention | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	52	78
Loans acquired | Special Mention | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		417
Loans acquired | Substandard | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		2
Loans acquired | Substandard | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,617	386
Loans acquired | Substandard | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	10,318	4,964
Loans acquired | Substandard | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	442	795
Loans acquired | Substandard | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	246	135
Loans acquired | Substandard | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	152	153
Loans acquired | Substandard | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	414	9,367
Loans acquired | Substandard | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	156	164
Loans acquired | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	5,679	1,761
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	4,416	1,036
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	281	205
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	4,135	831
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	620	228
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	374	228
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	246	0
Loans acquired | Non-Performing Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	566
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	152	0
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	414	417
Loans acquired | Non-Performing Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	77	77
Loans acquired | Non-Performing Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	2
Loans acquired | Non-Performing Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	1
Loans acquired | Non-Performing Loans | Pass | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Pass | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Pass | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Pass | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Pass | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Pass | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Pass | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Pass | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Special Mention | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Special Mention | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Special Mention | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Special Mention | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Special Mention | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans		417
Loans acquired | Non-Performing Loans | Substandard | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	281	205
Loans acquired | Non-Performing Loans | Substandard | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	4,135	831
Loans acquired | Non-Performing Loans | Substandard | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	374	228
Loans acquired | Non-Performing Loans | Substandard | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	246	0
Loans acquired | Non-Performing Loans | Substandard | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	152	0
Loans acquired | Non-Performing Loans | Substandard | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	414	417
Loans acquired | Non-Performing Loans | Substandard | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	77	77
Loans acquired | Performing (Accruing) Loans | Substandard | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Loans acquired | Performing (Accruing) Loans | 0-29 Days Past Due | Substandard | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Loans acquired | Performing (Accruing) Loans | 30-89 Days Past Due | Substandard | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		0
Loans acquired | Non-Performing Loans | Substandard | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans		2
Loans held-for-investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,678,877	2,425,275
Loans held-for-investment | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	499,860	445,781
Loans held-for-investment | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	79,312	85,030
Loans held-for-investment | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	420,548	360,751
Loans held-for-investment | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	92,433	101,650
Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	57,065	62,553
Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	35,368	39,097
Loans held-for-investment | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,933,946	1,739,220
Loans held-for-investment | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	170,832	131,792
Loans held-for-investment | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,763,114	1,607,428
Loans held-for-investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	80,315	67,679
Loans held-for-investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	44,190	34,893
Loans held-for-investment | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,520
Loans held-for-investment | Pass | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	78,917	84,620
Loans held-for-investment | Pass | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	409,155	346,857
Loans held-for-investment | Pass | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	54,912	60,400
Loans held-for-investment | Pass | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	34,808	38,504
Loans held-for-investment | Pass | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	170,832	131,792
Loans held-for-investment | Pass | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,756,882	1,603,947
Loans held-for-investment | Pass | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	80,077	67,426
Loans held-for-investment | Pass | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	43,640	34,141
Loans held-for-investment | Pass | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,520	1,432
Loans held-for-investment | Special Mention | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		1,432
Loans held-for-investment | Special Mention | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	395	410
Loans held-for-investment | Special Mention | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,137	2,170
Loans held-for-investment | Special Mention | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	747	683
Loans held-for-investment | Special Mention | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	613	1,897
Loans held-for-investment | Special Mention | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	27	28
Loans held-for-investment | Special Mention | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	430	571
Loans held-for-investment | Substandard | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	10,256	11,724
Loans held-for-investment | Substandard | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,406	1,470
Loans held-for-investment | Substandard | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	560	593
Loans held-for-investment | Substandard | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	5,619	1,584
Loans held-for-investment | Substandard | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	211	225
Loans held-for-investment | Substandard | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	120	181
Loans held-for-investment | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	3,516	3,775
Loans held-for-investment | Non-Performing Loans | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	2,875	3,051
Loans held-for-investment | Non-Performing Loans | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	2,875	3,051
Loans held-for-investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	542	573
Loans held-for-investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	510	534
Loans held-for-investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	32	39
Loans held-for-investment | Non-Performing Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	74	79
Loans held-for-investment | Non-Performing Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	25	72
Loans held-for-investment | Non-Performing Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0
Loans held-for-investment | Non-Performing Loans | Pass | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Pass | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Pass | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Pass | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Pass | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Pass | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Pass | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Pass | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Pass | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Special Mention | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Special Mention | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Special Mention | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Special Mention | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Special Mention | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Special Mention | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Substandard | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	2,875	3,051
Loans held-for-investment | Non-Performing Loans | Substandard | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	510	534
Loans held-for-investment | Non-Performing Loans | Substandard | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	32	39
Loans held-for-investment | Non-Performing Loans | Substandard | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Substandard | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	74	79
Loans held-for-investment | Non-Performing Loans | Substandard | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans	$ 25	72
Loans held-for-investment | Performing (Accruing) Loans | Special Mention | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		1,432
Loans held-for-investment | Performing (Accruing) Loans | 0-29 Days Past Due | Special Mention | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		1,403
Loans held-for-investment | Performing (Accruing) Loans | 30-89 Days Past Due | Special Mention | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Accruing Loans		29
Loans held-for-investment | Non-Performing Loans | Special Mention | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans		$ 0

Loans - Loans Held-for-Investme

Loans - Loans Held-for-Investment by Performing and Non-Performing Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	$ 2,678,877	$ 2,425,275
Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	9,162	5,508
Non-Performing Loans	9,195	5,536
Total Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	3,225,027	3,118,078
Total Loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,215,832	3,112,542
Total Loans | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	9,195	5,536
Loans held-for-investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	2,678,877	2,425,275
Loans held-for-investment | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	499,860	445,781
Loans held-for-investment | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	79,312	85,030
Loans held-for-investment | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	420,548	360,751
Loans held-for-investment | Real Estate | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	78,917	84,620
Loans held-for-investment | Real Estate | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	409,155	346,857
Loans held-for-investment | Real Estate | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	10,256	11,724
Loans held-for-investment | Real Estate | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	395	410
Loans held-for-investment | Real Estate | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,137	2,170
Loans held-for-investment | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	92,433	101,650
Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	57,065	62,553
Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	35,368	39,097
Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	54,912	60,400
Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	34,808	38,504
Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,406	1,470
Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	560	593
Loans held-for-investment | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	747	683
Loans held-for-investment | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	26,613	34,620
Loans held-for-investment | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	26,613	34,620
Loans held-for-investment | Real Estate | Construction and land | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net		17,201
Loans held-for-investment | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,933,946	1,739,220
Loans held-for-investment | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	170,832	131,792
Loans held-for-investment | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,763,114	1,607,428
Loans held-for-investment | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	170,832	131,792
Loans held-for-investment | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,756,882	1,603,947
Loans held-for-investment | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	5,619	1,584
Loans held-for-investment | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	613	1,897
Loans held-for-investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	80,315	67,679
Loans held-for-investment | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	80,077	67,426
Loans held-for-investment | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	211	225
Loans held-for-investment | Real Estate | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	27	28
Loans held-for-investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	44,190	34,893
Loans held-for-investment | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	43,640	34,141
Loans held-for-investment | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	120	181
Loans held-for-investment | Commercial and Industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	430	571
Loans held-for-investment | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,520
Loans held-for-investment | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,520	1,432
Loans held-for-investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,675,361	2,421,500
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	496,985	442,730
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	79,312	85,030
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	417,673	357,700
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	78,917	84,620
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	409,155	346,857
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	7,381	8,673
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	395	410
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,137	2,170
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	91,891	101,077
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	56,555	62,019
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	35,336	39,058
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	54,912	60,400
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	34,808	38,504
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	896	936
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	528	554
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	747	683
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	26,613	34,620
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	26,613	34,620
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Construction and land | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		17,201
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,933,946	1,739,220
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	170,832	131,792
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,763,114	1,607,428
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	170,832	131,792
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,756,882	1,603,947
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	5,619	1,584
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	613	1,897
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	80,241	67,600
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	80,077	67,426
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	137	146
Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	27	28
Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	44,165	34,821
Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	43,640	34,141
Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	95	109
Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	430	571
Loans held-for-investment | Performing (Accruing) Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,520
Loans held-for-investment | Performing (Accruing) Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,520	1,432
Loans held-for-investment | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	3,516	3,775
Loans held-for-investment | Non-Performing Loans | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	2,875	3,051
Loans held-for-investment | Non-Performing Loans | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	2,875	3,051
Loans held-for-investment | Non-Performing Loans | Real Estate | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	2,875	3,051
Loans held-for-investment | Non-Performing Loans | Real Estate | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	542	573
Loans held-for-investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	510	534
Loans held-for-investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	32	39
Loans held-for-investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	510	534
Loans held-for-investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	32	39
Loans held-for-investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Construction and land | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Loans held-for-investment | Non-Performing Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	74	79
Loans held-for-investment | Non-Performing Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	74	79
Loans held-for-investment | Non-Performing Loans | Real Estate | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	25	72
Loans held-for-investment | Non-Performing Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	25	72
Loans held-for-investment | Non-Performing Loans | Commercial and Industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans held-for-investment | Non-Performing Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0
Loans held-for-investment | Non-Performing Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	546,150	692,803
Loans acquired | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	6	37
Loans acquired | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net		2
Loans acquired | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	133,263	163,962
Loans acquired | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	43,767	50,582
Loans acquired | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	89,496	113,380
Loans acquired | Real Estate | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	41,071	50,105
Loans acquired | Real Estate | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	74,735	108,283
Loans acquired | Real Estate | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,617	386
Loans acquired | Real Estate | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	10,318	4,964
Loans acquired | Real Estate | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,079	91
Loans acquired | Real Estate | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	4,443	133
Loans acquired | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	225,877	275,053
Loans acquired | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	206,127	251,623
Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	19,750	23,430
Loans acquired | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	205,270	250,373
Loans acquired | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	19,504	23,295
Loans acquired | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	442	795
Loans acquired | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	246	135
Loans acquired | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	415	455
Loans acquired | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	12,003	17,201
Loans acquired | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	12,003
Loans acquired | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	145,485
Loans acquired | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	137,345	189,782
Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	8,140	199,149
Loans acquired | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	137,141	189,551
Loans acquired | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	7,726	8,950
Loans acquired | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	152	153
Loans acquired | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	414	9,367
Loans acquired | Real Estate | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	52	78
Loans acquired | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net		417
Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	17,583	20,455
Loans acquired | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	17,427	20,291
Loans acquired | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	156	164
Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	11,933	16,946
Loans acquired | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	11,933	16,944
Loans acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	540,471	691,042
Loans acquired | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	6	36
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	128,847	162,926
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	43,486	50,377
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	85,361	112,549
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	41,071	50,105
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	74,735	108,283
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,336	181
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	6,183	4,133
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,079	91
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,443	133
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	225,257	274,825
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	205,753	251,395
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	19,504	23,430
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	205,270	250,373
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	19,504	23,295
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	68	567
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	135
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	415	455
Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	12,003	17,201
Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	12,003
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	144,919
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	137,193	189,782
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	7,726	198,732
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	137,141	189,551
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	7,726	8,950
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	153
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	8,950
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	52	78
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	17,506	20,378
Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	17,427	20,291
Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	79	87
Loans acquired | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	11,933	16,944
Loans acquired | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	11,933	16,944
Loans acquired | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	5,679	1,761
Loans acquired | Non-Performing Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	1
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	4,416	1,036
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	281	205
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	4,135	831
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	281	205
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	4,135	831
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	620	228
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	374	228
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	246	0
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	374	228
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	246	0
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0
Loans acquired | Non-Performing Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	566
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	152	0
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	414	417
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	152	0
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	414	417
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		417
Loans acquired | Non-Performing Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	77	77
Loans acquired | Non-Performing Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	77	77
Loans acquired | Non-Performing Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	2
Loans acquired | Non-Performing Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
0-29 Days Past Due | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	440	511
0-29 Days Past Due | Total Loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,207,270	3,100,498
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,671,140	2,410,842
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	496,047	439,356
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	78,699	84,620
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	417,348	354,736
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	78,699	84,620
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	408,830	346,229
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	7,381	7,675
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,137	832
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	90,576	97,287
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	55,472	58,229
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	35,104	39,058
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	54,576	57,907
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	34,576	38,504
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	896	322
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	528	554
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	26,613	34,614
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	26,613	34,614
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Construction and land | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		17,201
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,931,980	1,735,923
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	170,534	131,488
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,761,446	1,604,435
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	170,534	131,488
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,756,443	1,603,714
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,390	83
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	613	638
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	80,241	67,600
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	80,077	67,426
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	137	146
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	27	28
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	44,165	34,659
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	43,640	34,003
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	95	109
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	430	547
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,518
0-29 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,518	1,403
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	536,130	689,656
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	6	36
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	127,408	161,954
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	43,335	50,126
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	84,073	111,828
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	41,071	50,035
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	73,986	108,125
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,185	0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	5,772	3,703
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,079	91
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,315	0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	222,452	274,451
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	202,948	251,021
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	19,504	23,430
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	202,471	250,149
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	19,504	23,295
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	62	417
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	135
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	415	455
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	12,003	17,201
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	12,003
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	144,867
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	137,141	189,782
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	7,726	198,732
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	137,141	189,551
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	7,726	8,950
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	153
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	8,950
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	78
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	17,506	20,378
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	17,427	20,291
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	79	87
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	11,888	16,904
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	11,888	16,904
30-89 Days Past Due | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,128	1,939
30-89 Days Past Due | Total Loans | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,562	12,044
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,221	10,658
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	938	3,374
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	613	410
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	325	2,964
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	218	0
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	325	628
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	998
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	395	410
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	1,338
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,315	3,790
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,083	3,790
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	232	0
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	336	2,493
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	232	0
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	614
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	747	683
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	6
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	6
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Construction and land | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,966	3,297
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	298	304
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,668	2,993
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	298	304
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	439	233
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,229	1,501
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	1,259
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	162
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	138
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Commercial and Industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	24
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2
30-89 Days Past Due | Loans held-for-investment | Performing (Accruing) Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2	29
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,341	1,386
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,439	972
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	151	251
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,288	721
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	70
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	749	158
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	151	181
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	411	430
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | 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 acquired | Performing (Accruing) Loans | Real Estate | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	128	133
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,805	374
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,805	374
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,799	224
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	6	150
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	52
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	52	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	52	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	45	40
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	$ 45	40
Performing (Accruing) Loans | Loans acquired | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
Performing (Accruing) Loans | 0-29 Days Past Due | Loans acquired | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
Performing (Accruing) Loans | 30-89 Days Past Due | Loans acquired | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
Non-Performing Loans | Loans acquired | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		$ 2

Loans - Summary of Impaired Loa

Loans - Summary of Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 22,329	$ 21,085
Unpaid Principal Balance	27,015	23,638
Related Allowance	(26)	(82)
Real Estate | Commercial mortgage
Financing Receivable, Impaired [Line Items]
Recorded Investment	18,091	16,008
Unpaid Principal Balance	21,984	17,849
Related Allowance	0	0
Real Estate | One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,685	3,387
Unpaid Principal Balance	2,940	3,628
Related Allowance	(18)	(75)
Real Estate | Multifamily
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,419	1,462
Unpaid Principal Balance	1,890	1,933
Related Allowance	0	0
Real Estate | Home equity and lines of credit
Financing Receivable, Impaired [Line Items]
Recorded Investment	61	69
Unpaid Principal Balance	61	69
Related Allowance	(5)	(4)
Real Estate | Home equity and lines of credit | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	34	37
Recorded Investment With a Related Allowance Recorded	33	36
Unpaid Principal Balance With a Related Allowance Recorded	33	36
Related Allowance	(5)	(4)
Real Estate | Home equity and lines of credit | Pass
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	153
Recorded Investment With No Allowance Recorded	28	33
Unpaid Principal Balance With No Related Allowance Recorded	28	33
Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment	73	159
Unpaid Principal Balance	140	159
Related Allowance	(3)	(3)
Commercial and Industrial | Substandard
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance Recorded	52	135
Unpaid Principal Balance With No Related Allowance Recorded	119	135
Commercial and Industrial | Special Mention
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	23	25
Recorded Investment With a Related Allowance Recorded	21	24
Unpaid Principal Balance With a Related Allowance Recorded	21	24
Related Allowance	(3)	(3)
Less Than 35% LTV | Real Estate | Commercial mortgage | Substandard
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance Recorded	0	0
Unpaid Principal Balance With No Related Allowance Recorded	139	139
Less Than 35% LTV | Real Estate | Multifamily | Substandard
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance Recorded	152	153
Unpaid Principal Balance With No Related Allowance Recorded	152	153
Equal to or Greater than 35% LTV | Real Estate | Commercial mortgage | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	267	404
Recorded Investment With No Allowance Recorded	12,160	9,745
Unpaid Principal Balance With No Related Allowance Recorded	15,028	10,560
Equal to or Greater than 35% LTV | Real Estate | Commercial mortgage | Pass
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance Recorded	5,931	6,263
Unpaid Principal Balance With No Related Allowance Recorded	6,817	7,150
Equal to or Greater than 35% LTV | Real Estate | Multifamily | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	180
Equal to or Greater than 35% LTV | Real Estate | Multifamily | Pass
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	778
Recorded Investment With No Allowance Recorded	38	1,309
Unpaid Principal Balance With No Related Allowance Recorded	509	1,780
Less Than 60% LTV | Real Estate | One-to-four family residential mortgage | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	733	1,264
Recorded Investment With No Allowance Recorded	241	251
Recorded Investment With a Related Allowance Recorded	657	997
Unpaid Principal Balance With No Related Allowance Recorded	241	251
Unpaid Principal Balance With a Related Allowance Recorded	657	997
Related Allowance	(18)	(49)
Less Than 60% LTV | Real Estate | One-to-four family residential mortgage | Pass
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	164	165
Recorded Investment With No Allowance Recorded	1,532	1,189
Recorded Investment With a Related Allowance Recorded	0	411
Unpaid Principal Balance With No Related Allowance Recorded	1,606	1,254
Unpaid Principal Balance With a Related Allowance Recorded	0	411
Related Allowance	0	(7)
Equal to or Greater than 60% LTV | Real Estate | One-to-four family residential mortgage | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	152
Recorded Investment With No Allowance Recorded	126	135
Unpaid Principal Balance With No Related Allowance Recorded	278	286
Equal to or Greater than 60% LTV | Real Estate | One-to-four family residential mortgage | Pass
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	54	271
Recorded Investment With No Allowance Recorded	129	136
Recorded Investment With a Related Allowance Recorded	0	268
Unpaid Principal Balance With No Related Allowance Recorded	158	161
Unpaid Principal Balance With a Related Allowance Recorded	0	268
Related Allowance	0	(19)
Equal to or Greater than 35% LTV | Commercial mortgage | Pass
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	880	0
Equal to or Greater than 35% LTV | Multifamily | Substandard
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Allowance Recorded	1,229	0
Unpaid Principal Balance With No Related Allowance Recorded	$ 1,229	$ 0

Loans - Average Recorded Invest

Loans - Average Recorded Investment and Interest Recognized on Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 123	$ 152
Interest Income	1	1
Real Estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	21,485	23,797
Interest Income	942	1,009
Real Estate | Commercial mortgage
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	16,947	18,322
Interest Income	735	810
Real Estate | One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	2,915	3,422
Interest Income	113	133
Real Estate | Home equity and lines of credit
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,435	1,675
Interest Income	89	62
Real Estate | Home equity and lines of credit | Substandard
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With a Related Allowance Recorded	34	37
Interest Income With a Related Allowance Recorded	2	1
Real Estate | Home equity and lines of credit | Pass
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	31	36
Average Recorded Investment With a Related Allowance Recorded	0	153
Interest Income With No Allowance Recorded	2	2
Interest Income With a Related Allowance Recorded	0	0
Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	65	226
Interest Income	4	3
Commercial and Industrial | Substandard
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	100	127
Interest Income With No Allowance Recorded	0	0
Commercial and Industrial | Special Mention
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With a Related Allowance Recorded	23	25
Interest Income With a Related Allowance Recorded	1	1
Less Than 35% LTV | Real Estate | Commercial mortgage | Substandard
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	0	0
Interest Income With No Allowance Recorded	0	45
Less Than 35% LTV | Real Estate | Multifamily | Substandard
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	152	154
Interest Income With No Allowance Recorded	6	6
Equal to or Greater than 35% LTV | Real Estate | Commercial mortgage | Substandard
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	10,582	12,402
Average Recorded Investment With a Related Allowance Recorded	267	404
Interest Income With No Allowance Recorded	404	431
Interest Income With a Related Allowance Recorded	0	0
Equal to or Greater than 35% LTV | Real Estate | Commercial mortgage | Pass
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	5,218	5,516
Interest Income With No Allowance Recorded	255	334
Equal to or Greater than 35% LTV | Real Estate | Multifamily | Substandard
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	987	0
Average Recorded Investment With a Related Allowance Recorded	0	180
Interest Income With No Allowance Recorded	67	0
Interest Income With a Related Allowance Recorded	0	0
Equal to or Greater than 35% LTV | Real Estate | Multifamily | Pass
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	296	563
Average Recorded Investment With a Related Allowance Recorded	0	778
Interest Income With No Allowance Recorded	16	56
Interest Income With a Related Allowance Recorded	0	0
Less Than 60% LTV | Real Estate | One-to-four family residential mortgage | Substandard
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	246	372
Average Recorded Investment With a Related Allowance Recorded	733	1,264
Interest Income With No Allowance Recorded	12	14
Interest Income With a Related Allowance Recorded	19	20
Less Than 60% LTV | Real Estate | One-to-four family residential mortgage | Pass
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	1,403	854
Average Recorded Investment With a Related Allowance Recorded	164	165
Interest Income With No Allowance Recorded	62	56
Interest Income With a Related Allowance Recorded		7
Equal to or Greater than 60% LTV | Real Estate | One-to-four family residential mortgage | Substandard
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	129	289
Average Recorded Investment With a Related Allowance Recorded	0	152
Interest Income With No Allowance Recorded	13	13
Interest Income With a Related Allowance Recorded	0	0
Equal to or Greater than 60% LTV | Real Estate | One-to-four family residential mortgage | Pass
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Allowance Recorded	186	55
Average Recorded Investment With a Related Allowance Recorded	54	271
Interest Income With No Allowance Recorded	7	4
Interest Income With a Related Allowance Recorded	0	19
Equal to or Greater than 35% LTV | Commercial mortgage | Pass
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With a Related Allowance Recorded	880	0
Interest Income With a Related Allowance Recorded	$ 76	$ 0

Loans - Narrative, TDR (Details

Loans - Narrative, TDR (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)contract	Dec. 31, 2017USD ($)contract
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings	$ 16,900	$ 18,300
Number of loans modified as TDR that subsequently defaulted | contract	1	1
One-to-four family residential mortgage
Financing Receivable, Modifications [Line Items]
Pre-modification outstanding recorded investment	$ 6	$ 256

Premises and Equipment, Net - P

Premises and Equipment, Net - Premises and Equipment Less Accumulated Depreciation and Amortization (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 69,778	$ 66,899
Accumulated depreciation and amortization	(44,173)	(41,153)
Premises and equipment, net	25,605	25,746
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	4,018	4,018
Buildings and improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	8,905	8,883
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	24,140	22,677
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 30,115	$ 28,721

Premises and Equipment, Net - N

Premises and Equipment, Net - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 3,000,000	$ 3,200,000	$ 3,600,000
Sales of premises and equipment	$ 0	$ 0	$ 0

Deposits - Deposit Account Bala

Deposits - Deposit Account Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Amount
Negotiable orders of withdrawal	$ 458,012	$ 465,140
Non-interest bearing checking	395,375	407,267
Total transaction	853,387	872,407
Money market	741,939	800,854
Savings	594,290	424,789
Total savings	1,336,229	1,225,643
$100000	599,245	401,063
$100,000 or more	497,651	337,866
Total certificates of deposit	1,096,896	738,929
Total deposits	$ 3,286,512	$ 2,836,979
Weighted Average Rate
Negotiable orders of withdrawal	0.68%	0.39%
Total transaction	0.36%	0.21%
Money market	1.12%	0.72%
Savings	0.90%	0.18%
Total savings	1.02%	0.53%
$100000	1.91%	1.42%
$100,000 or more	2.01%	1.51%
Total certificates of deposit	1.96%	1.46%
Total deposits	1.16%	0.67%

Deposits - Narrative (Details)

Deposits - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Certificates of Deposit
Time Deposits [Line Items]
Brokered deposits	$ 275.4	$ 150.6

Deposits - Maturities Of Certif

Deposits - Maturities Of Certificates Of Deposit (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
2,019	$ 841,562
2,020	138,277
2,021	36,282
2,022	46,187
2,023	34,588
Thereafter	0
Total certificates of deposit	$ 1,096,896	$ 738,929

Deposits - Interest Expense On

Deposits - Interest Expense On Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Transaction	$ 2,175	$ 1,429	$ 957
Savings and money market	8,878	6,804	6,801
Certificates of deposit	16,688	8,153	6,529
Total interest expense on deposits	$ 27,741	$ 16,386	$ 14,287

Borrowings - Summary Of Borrowi

Borrowings - Summary Of Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Repurchase agreements	$ 0	$ 2,000
Other borrowings:
FHLB advances	403,502	464,217
Floating rate advances	5,345	5,033
Obligations under capital leases	44	299
Total long term debt	$ 408,891	$ 471,549

Borrowings - Contractual Maturi

Borrowings - Contractual Maturities Repurchase Agreements And FHLB Advances (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Long Term Debt Maturities Repayments Of Principal [Line Items]
Total long term debt	$ 408,891	$ 471,549
FHLB Advances
Long Term Debt Maturities Repayments Of Principal [Line Items]
2,019	123,502
2,020	90,000
2,021	70,000
2,022	20,000
2,023	87,500
Thereafter	12,500
Total long term debt	$ 403,502

Borrowings - Narrative (Details

Borrowings - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2016
Schedule Of Short Term And Long Term Debt [Line Items]
FHLB advances	$ 1,230
Unencumbered securities	462.4
Multifamily loans held as collateral	789.6
Repurchase agreements
Schedule Of Short Term And Long Term Debt [Line Items]
Maturity in the first quarter	$ 2
Repurchase agreements | Mortgage-backed securities
Schedule Of Short Term And Long Term Debt [Line Items]
Mortgage-backed securities amortized cost		$ 4.7
Mortgage-backed securities held for sale fair value		$ 4.6

Borrowings - Summary Of Interes

Borrowings - Summary Of Interest Expense On Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest Expense [Line Items]
Interest expense	$ 8,309	$ 7,590	$ 7,381
Obligations under capital leases
Interest Expense [Line Items]
Interest expense	7	30	42
FHLB advances
Interest Expense [Line Items]
Interest expense	8,172	7,390	6,743
Floating rate advances
Interest Expense [Line Items]
Interest expense	123	33	27
Repurchase agreements
Interest Expense [Line Items]
Interest expense	$ 7	$ 137	$ 569

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal tax expense (benefit):
Current	$ 8,540	$ 10,113	$ 14,218
Deferred	(742)	14,290	(1,260)
Federal tax expense (benefit)	7,798	24,403	12,958
State and local tax expense (benefit):
Current	1,985	1,672	2,506
Deferred	(151)	903	(1,799)
State and local tax expense (benefit)	1,834	2,575	707
Income tax expense	$ 9,632	$ 26,978	$ 13,665

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Tax expense at statutory rate	$ 10,439	$ 18,111	$ 13,928
Increase (decrease) in taxes resulting from:
State tax, net of federal income tax	1,448	1,674	460
Impact of 2017 federal tax reform	0	10,453	0
Bank owned life insurance	(778)	(1,885)	(1,399)
ESOP fair market value adjustment	196	404	352
Incentive stock options	146	247	299
Uncertain tax position	0	132	178
Merger related costs	0	0	74
Excess tax benefits from employee share based payments	(1,939)	(2,309)	0
Other, net	120	151	(227)
Income tax expense	$ 9,632	$ 26,978	$ 13,665

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Re-measurement of our net deferred tax asset	$ 10,500
Operating Loss Carryforwards [Line Items]
Net deferred tax asset	25,325	$ 23,002
Bad debt base year reserve	5,900	5,900
Federal tax bad debt deferred tax liability	$ 2,800	$ 2,800
Hopewell Valley Community Bank
Operating Loss Carryforwards [Line Items]
Net deferred tax asset			$ 3,900

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, 2018	Dec. 31, 2017
Deferred tax assets:
Allowance for loan losses	$ 7,317	$ 6,836
Capitalized leases	13	84
Deferred compensation	3,426	3,474
Accrued salaries	737	2
Postretirement benefits	375	381
Equity awards	3,045	3,582
Unrealized actuarial losses on post-retirement benefits	18	93
Straight-line leases adjustment	1,051	892
Asset retirement obligation	67	65
Reserve for accrued interest receivable	602	712
Reserve for loan commitments	146	124
Employee Stock Ownership Plan	551	497
Other	261	236
Depreciation	2,383	2,116
Fair value adjustments of acquired loans	3,934	4,868
Fair value adjustments of pension benefit obligations	154	154
Unrealized losses on securities	3,575	2,070
Total gross deferred tax assets	27,655	26,186
Deferred tax liabilities:
Fair value adjustments of acquired securities	28	35
Fair value adjustments of deposit liabilities	285	358
Deferred loan fees	1,984	1,815
Undistributed earnings related to NSB Realty Trust	0	939
Other	33	37
Total gross deferred tax liabilities	2,330	3,184
Net deferred tax asset	$ 25,325	$ 23,002

Income Taxes - Reconciliation O

Income Taxes - Reconciliation Of Uncertain Tax Position (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 482	$ 459	$ 281
Settlements based on tax positions related to prior years	(238)	(109)	0
Additions based on tax positions related to prior years	286	132	178
Ending balance	$ 482	$ 459	$ 281	$ 530

Retirement Benefits - Narrative

Retirement Benefits - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
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
Contribution plan subsequent participation period (years)	3 years
Requisite service period for members to become fully vested	5 years
Company contribution amount	$ 394	$ 387	$ 384
ESOP compensation expense	2,000	2,200	2,000
Estimated loss that will be amortized from accumulated other comprehensive income (loss) into net periodic cost	2
Prior service cost that will be amortized from accumulated other comprehensive income (loss) into net periodic cost	0
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	$ 120	112	118
Benefits expected to be paid under the postretirement health benefits plan in 2019	94
Benefits expected to be paid under the postretirement health benefits plan in 2020	97
Benefits expected to be paid under the postretirement health benefits plan in 2021	101
Benefits expected to be paid under the postretirement health benefits plan in 2022	105
Benefits expected to be paid under the postretirement health benefits plan in 2023	95
Benefits expected to be paid under the postretirement health benefits plan in 2024 through 2028	438
Supplemental Employee Retirement Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation	12,700	13,700
Net postretirement benefit cost included in compensation and employee benefits	$ (879)	1,100	503
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	2,463,884
Initial public offering price (usd per share)	$ 7.13
Outstanding loan balance	$ 10,800	$ 11,500
Shares released and allocated to participants (in shares)	101,514	99,670
Second ESOP
Defined Benefit Plan Disclosure [Line Items]
Employee stock ownership plan, shares authorized and purchased	1,422,357
Initial public offering price (usd per share)	$ 10
Outstanding loan balance	$ 12,200	$ 12,600
Shares released and allocated to participants (in shares)	52,523	51,189
Supplemental ESOP
Defined Benefit Plan Disclosure [Line Items]
Company contribution to SESOP plan	$ 76	$ 84	$ 82

Retirement Benefits - Funded St

Retirement Benefits - Funded Status And Components Of Post Retirement Benefit Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefits paid	$ (120)	$ (112)	$ (118)
Other Pension Plans, Defined Benefit
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Accumulated postretirement benefit obligation beginning of year	1,645	1,697	1,950
Service cost	11	11	8
Interest cost	52	57	71
Actuarial (gain) loss	(229)	(8)	(214)
Benefits paid	(120)	(112)	(118)
Accumulated postretirement benefit obligation end of year	1,359	1,645	1,697
Accrued liability (included in accrued expenses and other liabilities)	$ 1,359	$ 1,645	$ 1,697

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, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Net loss	$ 20	$ 274
Transition obligation	0	0
Prior service cost	0	0
Loss recognized in accumulated other comprehensive income (loss)	$ 20	$ 274

Retirement Benefits - Component

Retirement Benefits - Components Of Net Periodic Post Retirement Benefit Cost (Details) - Other Pension Plans, Defined Benefit - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 11	$ 11	$ 8
Interest cost	52	57	71
Amortization of prior service costs	0	0	12
Amortization of unrecognized loss	25	28	54
Net postretirement benefit cost included in compensation and employee benefits	$ 88	$ 96	$ 145

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Assumptions used to determine benefit obligation at period end:
Discount rate	4.00%	3.25%	3.50%
Rate of increase in compensation	4.00%	4.00%	4.00%
Assumptions used to determine net periodic benefit cost for the year:
Discount rate	3.25%	3.50%	3.75%
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, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Aggregate of service and interest components of net periodic cost (benefit), one percentage point increase	$ 4	$ 4	$ 6
Aggregate of service and interest components of net periodic cost (benefit), one percentage point decrease	(3)	(4)	$ (5)
Effect on accumulated postretirement benefit obligation, one percentage point increase	109	111
Effect on accumulated postretirement benefit obligation, one percentage point decrease	$ (94)	$ (100)

Equity Incentive Plan - Narrati

Equity Incentive Plan - Narrative (Details) - USD ($) $ in Millions	Aug. 27, 2018	Nov. 01, 2017	Sep. 19, 2017	Aug. 01, 2017	Nov. 16, 2016	Nov. 30, 2016	May 31, 2015	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)								0	98,244
Allocated stock-based compensation expense								$ 5.4	$ 6.2	$ 7.3
2008 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under equity incentive plan (in shares)								4,311,796
Vesting period (years)									5 years
Beginning of vesting period (years)									1 year
2014 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under equity incentive plan (in shares)								4,978,249
Vesting period (years)								5 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected future stock-based compensation expense								$ 2.5
Average period of expected future stock option expense								1 year 2 months 12 days
Restricted Stock | 2008 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under equity incentive plan (in shares)								1,231,941
Shares available for issuance under equity incentive plan (in shares)								0
Shares granted (in shares)	3,378					20,000
Restricted Stock | 2008 Equity Incentive Plan | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance under equity incentive plan (in shares)								34,500
Restricted Stock | 2014 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under equity incentive plan (in shares)								1,422,357
Shares available for issuance under equity incentive plan (in shares)								142,154
Shares granted (in shares)	11,622
Vesting period (years)	2 years
Beginning of vesting period (years)	6 months
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected future stock-based compensation expense								$ 1.6
Average period of expected future stock option expense								1 year 1 month 10 days
Stock Options | 2008 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under equity incentive plan (in shares)								3,079,855
Shares available for issuance under equity incentive plan (in shares)								0
Stock options granted (in shares)		40,000,000	12,500,000	45,744,000	40,000,000	40,000
Stock option expiration period (years)								10 years
Stock Options | 2008 Equity Incentive Plan | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance under equity incentive plan (in shares)								98,244
Stock Options | 2008 Equity Incentive Plan | Director | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (years)								10 months
Stock Options | 2008 Equity Incentive Plan | Director | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (years)								34 months
Stock Options | 2014 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under equity incentive plan (in shares)								3,555,892
Shares available for issuance under equity incentive plan (in shares)								348,373
Beginning of vesting period (years)								1 year
Stock option expiration period (years)							10 years

Equity Incentive Plan - Valuati

Equity Incentive Plan - Valuation Assumptions (Details) - shares	Nov. 01, 2017	Sep. 19, 2017	Aug. 01, 2017	Nov. 16, 2016	Nov. 30, 2016	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)						0	98,244
2008 Equity Incentive Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	40,000,000	12,500,000	45,744,000	40,000,000	40,000
Risk-free rate of return	2.06%	1.89%	1.86%	1.80%
Volatility (percent)	29.22%	30.06%	29.46%	30.07%
Dividend yield (percent)	2.37%	1.98%	1.91%	1.74%
Expected life	5 years 9 months	5 years 9 months	5 years 9 months	6 years 6 months

Equity Incentive Plan - Stock O

Equity Incentive Plan - Stock Options Outstanding (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of Stock Options
Outstanding (shares) - Beginning Balance	4,620,687	5,328,670
Granted (shares)	0	98,244
Forfeited (shares)	(29,378)	(247,484)
Exercised (shares)	(1,339,714)	(558,743)
Outstanding (shares) - Ending Balance	3,251,595	4,620,687	5,328,670
Exercisable (shares)	2,440,884
Weighted Average Grant Date Fair Value
Outstanding (usd per share) - Beginning Balance	$ 3.51	$ 3.41
Granted (usd per share)	0	4.04
Forfeited (usd per share)	3.36	3.93
Exercised (usd per share)	2.49	2.41
Outstanding (usd per share) - Ending Balance	3.93	3.51	$ 3.41
Exercisable (usd per share)	3.89
Weighted Average Exercise Price
Outstanding (usd per share) - Beginning Balance	11.82	11.36
Granted (usd per share)	0	16.73
Forfeited (usd per share)	11.51	13.68
Exercised (usd per share)	7.75	7.52
Outstanding (usd per share) - Ending Balance	13.51	$ 11.82	$ 11.36
Exercisable (usd per share)	$ 13.28
Outstanding, weighted average contractual life (years)	5 years 7 months 13 days	5 years 2 months 1 day	5 years 9 months 11 days
Granted, weighted average contractual life (years)		9 years 8 months 16 days
Exercisable, weighted average contractual life (years)	5 years 5 months 12 days

Equity Incentive Plan - Status

Equity Incentive Plan - Status Of The Company's Restricted Share Awards (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Number of Shares Awarded
Non-vested (shares) - Beginning Balance	585,895	924,002
Granted (shares)	15,000	34,500
Vested (shares)	(266,973)	(279,660)
Forfeited (shares)	(4,960)	(92,947)
Non-vested (shares) - Ending Balance	328,962	585,895
Weighted Average Grant Date Fair Value
Non-vested (usd per share) - Beginning Balance	$ 14.05	$ 13.82
Granted (usd per share)	16.48	16.70
Vested (usd per share)	13.86	13.68
Forfeited (usd per share)	14.18	13.92
Non-vested (usd per share) - Ending Balance	$ 14.31	$ 14.05

Commitments and Contingencies -

Commitments and Contingencies - Commitment and Contingent Liabilities Not Reflected in Consolidated Financial Statements (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Commitments to extend credit
Commitments and contingent liabilities	$ 39,326	$ 43,611
Unused lines of credit
Commitments and contingent liabilities	136,586	98,433
Standby letters of credit
Commitments and contingent liabilities	$ 5,352	$ 7,000

Commitments and Contingencies_2

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Guarantees extend term period (years)	1 year
Allowance for estimated losses on commitments	$ 523	$ 442
Net rental expense	$ 5,700	$ 5,300	$ 5,200
Agreements term (years)	3 years

Commitments and Contingencies_3

Commitments and Contingencies - The Projected Minimum Annual Rental Payments And Receipts Under The Capitalized Leases And Operating Leases (Details) $ in Thousands	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Capitalized Leases, 2019	$ 44
Capitalized Leases, 2020	0
Capitalized Leases, 2021	0
Capitalized Leases, 2022	0
Capitalized Leases, 2023	0
Capitalized Leases, Thereafter	0
Capitalized Leases, Total minimum lease payments	44
Operating Leases, 2019	5,735
Operating Leases, 2020	5,949
Operating Leases, 2021	5,512
Operating Leases, 2022	4,844
Operating Leases, 2023	4,744
Operating Leases, Thereafter	35,260
Operating Leases, Total minimum lease payments	$ 62,044

Regulatory Requirements - Narra

Regulatory Requirements - Narrative (Details)	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2016	Jan. 01, 2015
Regulatory Requirements [Abstract]
Common equity Tier 1 capital (to risk-weighted assets), for capital adequacy purposes ratio		4.50%	4.50%		4.50%
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes ratio		6.00%	6.00%		6.00%
Total capital (to risk-weighted assets), for capital adequacy purposes ratio		8.00%	8.00%
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 ratio		5.00%	5.00%
Common equity Tier 1 capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio		6.50%	6.50%
Tier 1 risk-based capital ratio		8.00%	8.00%
Total capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio		10.00%	10.00%
Tier 1 risk-based capital required for capital adequacy to risk-weighted assets, higher risk weight		2.50%
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer		1.875%		0.625%
Subsequent Event
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer	2.50%

Regulatory Requirements - Regul

Regulatory Requirements - Regulatory Capital Amounts And Ratios Compared To Regulatory Requirements (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2015
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 Capital (to risk-weighted assets), amount	$ 636,141	$ 604,208
Common Equity Tier 1 Capital (to risk-weighted assets), ratio	17.17%	18.02%
Common Equity Tier 1 Capital (to risk-weighted assets), for capital adequacy purposes amount	$ 166,717	$ 150,917
Common Equity Tier 1 Capital (to risk-weighted assets), for capital adequacy purposes ratio	4.50%	4.50%	4.50%
Common Equity Tier 1 Capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions amount	$ 240,814	$ 217,991
Common Equity Tier 1 Capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio	6.50%	6.50%
Tier 1 capital (core) (to adjusted total assets), amount	$ 636,141	$ 604,208
Tier 1 capital (core) (to adjusted total assets), ratio	14.82%	15.27%
Tier 1 capital (core) (to adjusted total assets), for capital adequacy purposes amount	$ 171,724	$ 158,254
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	$ 214,656	$ 197,818
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	$ 636,141	$ 604,208
Tier 1 capital (to risk-weighted assets), ratio	17.17%	18.02%
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes amount	$ 222,290	$ 201,222
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes ratio	6.00%	6.00%	6.00%
Tier 1 capital (to risk-weighted assets) for well capitalized under prompt corrective action provisions amount	$ 296,386	$ 268,296
Tier 1 capital (to risk-weighted assets) for well capitalized under prompt corrective action provisions ratio	8.00%	8.00%
Total capital (to risk-weighted assets), actual	$ 664,190	$ 630,853
Total capital (to risk-weighted assets), ratio	17.93%	18.81%
Total capital (to risk-weighted assets), for capital adequacy purposes amount	$ 296,386	$ 268,296
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	$ 370,483	$ 335,370
Total capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio	10.00%	10.00%
Subsidiaries
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 Capital (to risk-weighted assets), amount	$ 592,815	$ 559,717
Common Equity Tier 1 Capital (to risk-weighted assets), ratio	16.00%	16.70%
Common Equity Tier 1 Capital (to risk-weighted assets), for capital adequacy purposes amount	$ 166,742	$ 150,862
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	$ 240,850	$ 217,912
Common Equity Tier 1 Capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio	6.50%	6.50%
Tier 1 capital (core) (to adjusted total assets), amount	$ 592,815	$ 559,717
Tier 1 capital (core) (to adjusted total assets), ratio	13.81%	14.15%
Tier 1 capital (core) (to adjusted total assets), for capital adequacy purposes amount	$ 171,663	$ 158,220
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	$ 214,579	$ 197,775
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	$ 592,815	$ 559,717
Tier 1 capital (to risk-weighted assets), ratio	16.00%	16.70%
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes amount	$ 222,323	$ 201,150
Tier 1 capital (to risk-weighted assets), for capital adequacy purposes ratio	6.00%	6.00%
Tier 1 capital (to risk-weighted assets) for well capitalized under prompt corrective action provisions amount	$ 296,430	$ 268,200
Tier 1 capital (to risk-weighted assets) for well capitalized under prompt corrective action provisions ratio	8.00%	8.00%
Total capital (to risk-weighted assets), actual	$ 620,863	$ 586,361
Total capital (to risk-weighted assets), ratio	16.76%	17.49%
Total capital (to risk-weighted assets), for capital adequacy purposes amount	$ 296,430	$ 268,200
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	$ 370,538	$ 335,250
Total capital (to risk-weighted assets), for well capitalized under prompt corrective action provisions ratio	10.00%	10.00%

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, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 8,968	$ 9,597
Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	808,031	513,782
Trading securities	8,968	9,597
Total	817,236	523,702
Recurring Basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Trading securities	8,968	9,597
Total	9,205	9,920
Recurring Basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	808,031	513,782
Trading securities	0	0
Total	808,031	513,782
Recurring Basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Trading securities	0	0
Total	0	0
Recurring Basis | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	565,009	445,303
Recurring Basis | Mortgage-backed securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Mortgage-backed securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	565,009	445,303
Recurring Basis | Mortgage-backed securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Mortgage-backed securities, Pass-through certificates, GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	314,788	178,295
Recurring Basis | Mortgage-backed securities, Pass-through certificates, GSE | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Mortgage-backed securities, Pass-through certificates, GSE | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	314,788	178,295
Recurring Basis | Mortgage-backed securities, Pass-through certificates, GSE | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Mortgage-backed securities, REMICs, GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	250,163	266,929
Recurring Basis | Mortgage-backed securities, REMICs, GSE | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0
Recurring Basis | Mortgage-backed securities, REMICs, GSE | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	250,163	266,929
Recurring Basis | Mortgage-backed securities, REMICs, GSE | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Mortgage-backed securities, REMICs, Non-GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	58	79
Recurring Basis | Mortgage-backed securities, REMICs, Non-GSE | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Mortgage-backed securities, REMICs, Non-GSE | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	58	79
Recurring Basis | Mortgage-backed securities, REMICs, Non-GSE | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	273	349
Recurring Basis | Municipal bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Municipal bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	273	349
Recurring Basis | Municipal bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities		0
Recurring Basis | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	242,749	68,130
Recurring Basis | Corporate bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Corporate bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	242,749	68,130
Recurring Basis | Corporate bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	243,022	68,479
Recurring Basis | Other debt securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Other debt securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	243,022	68,479
Recurring Basis | Other debt securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage-backed securities	0	0
Recurring Basis | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	237	323
Recurring Basis | Equity securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	237	323
Recurring Basis | Equity securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	0	0
Recurring Basis | Equity securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	0	0
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	5,697	850
Total		7,333
Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	0	0
Total		0
Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	0	0
Total		0
Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	5,697	850
Total		7,333
Real Estate | Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	5,679	6,462
Real Estate | Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Real Estate | Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Real Estate | Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	5,679	6,462
Real Estate | Nonrecurring | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	4,847	4,645
Real Estate | Nonrecurring | Commercial real estate | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Real Estate | Nonrecurring | Commercial real estate | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Real Estate | Nonrecurring | Commercial real estate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	4,847	4,645
Real Estate | Nonrecurring | One-to-four family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	765	1,735
Real Estate | Nonrecurring | One-to-four family residential mortgage | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Real Estate | Nonrecurring | One-to-four family residential mortgage | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Real Estate | Nonrecurring | One-to-four family residential mortgage | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	765	1,735
Real Estate | Nonrecurring | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	39	51
Real Estate | Nonrecurring | Multifamily | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Real Estate | Nonrecurring | Multifamily | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Real Estate | Nonrecurring | Multifamily | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	39	51
Real Estate | Nonrecurring | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	28	31
Real Estate | Nonrecurring | Home equity and lines of credit | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Real Estate | Nonrecurring | Home equity and lines of credit | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Real Estate | Nonrecurring | Home equity and lines of credit | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	28	31
Commercial and Industrial | Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	18	21
Commercial and Industrial | Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial and Industrial | Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial and Industrial | Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 18	$ 21

Fair Value Measurement - Qualit

Fair Value Measurement - Qualitative Information For Level 3 Assets Measured At Fair Value On A Non-Recurring Basis (Details) $ in Thousands	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Discount for costs to sell
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	$ 5,697	$ 6,483
Discount for costs to sell | Other real estate owned
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Other real estate owned	$ 0	$ 850
Appraisals | Discount rate | Discount for costs to sell
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Input, Impaired loans	0.070	0.070
Input, Other real estate owned	0.070	0.070
Discounted cash flows | Discount rate | Discount for quick sale
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Input, Impaired loans	0.100	0.100
Discounted cash flows | Discount rate | Interest rates | Minimum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Input, Impaired loans	0.0313	0.0413
Discounted cash flows | Discount rate | Interest rates | Maximum
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Input, Impaired loans	0.0625	0.0650

Fair Value Measurement - Narrat

Fair Value Measurement - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Impaired loans held-for-investment and held-for-sale with outstanding principal balances	$ 10,200,000	$ 8,800,000
Estimated fair value of impaired loans held-for-investment and held-for-sale	5,700,000	6,500,000
Decrease in reserve for impaired loans	56,000	246,000
Net impairment charge-offs	1,300,000	154,000
Assets acquired through foreclosure, or deed in lieu of foreclosure	$ 0	$ 850,000

Fair Value Measurement - Estima

Fair Value Measurement - Estimated Fair Values Of The Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financial assets:
Trading securities	$ 8,968	$ 9,597
Debt securities available-for-sale	808,031	513,782
Debt securities held-to-maturity	9,249	9,892
Financial liabilities:
Investments measured at net asset value	1,000	1,000
Carrying Value
Financial assets:
Cash and cash equivalents	77,762	57,839
Trading securities	8,968	9,597
Debt securities available-for-sale	808,031	513,782
Debt securities held-to-maturity	9,505	9,931
Equity securities	237	323
FHLB of New York stock, at cost	22,517	25,046
Net loans held-for-investment	3,217,673	3,114,659
Financial liabilities:
Deposits	3,286,512	2,836,979
Other borrowings	408,891	471,549
Advance payments by borrowers	18,007	14,798
Estimated Fair Value
Financial assets:
Cash and cash equivalents	77,762	57,839
Trading securities	8,968	9,597
Debt securities available-for-sale	808,031	513,782
Debt securities held-to-maturity	9,249	9,892
Equity securities	237	323
FHLB of New York stock, at cost	22,517	25,046
Net loans held-for-investment	3,236,136	3,157,829
Financial liabilities:
Deposits	3,291,085	2,839,666
Other borrowings	403,476	466,625
Advance payments by borrowers	18,007	14,798
Estimated Fair Value | Level 1
Financial assets:
Cash and cash equivalents	77,762	57,839
Trading securities	8,968	9,597
Debt securities available-for-sale	323	0
Debt securities held-to-maturity	0	0
Equity securities	237	323
FHLB of New York stock, at cost	0	0
Net loans held-for-investment	0	0
Financial liabilities:
Deposits	0	0
Other borrowings	0	0
Advance payments by borrowers	0	0
Estimated Fair Value | Level 2
Financial assets:
Cash and cash equivalents	0	0
Trading securities	0	0
Debt securities available-for-sale	807,708	513,782
Debt securities held-to-maturity	9,249	9,892
Equity securities	0	0
FHLB of New York stock, at cost	22,517	25,046
Net loans held-for-investment	0	0
Financial liabilities:
Deposits	3,291,085	2,839,666
Other borrowings	403,476	466,625
Advance payments by borrowers	18,007	14,798
Estimated Fair Value | Level 3
Financial assets:
Cash and cash equivalents	0	0
Trading securities	0	0
Debt securities available-for-sale	0	0
Debt securities held-to-maturity	0	0
Equity securities	0	0
FHLB of New York stock, at cost	0	0
Net loans held-for-investment	3,236,136	3,157,829
Financial liabilities:
Deposits	0	0
Other borrowings	0	0
Advance payments by borrowers	$ 0	$ 0

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 40,079	$ 24,768	$ 26,130
Weighted average shares outstanding-basic (in shares)	46,319,760	45,325,445	44,374,389
Effect of non-vested restricted stock and stock options outstanding (in shares)	787,673	1,550,285	1,343,498
Weighted average shares outstanding-diluted (in shares)	47,107,433	46,875,730	45,717,887
Earnings per share-basic (usd per share)	$ 0.87	$ 0.55	$ 0.59
Earnings per share-diluted (usd per share)	$ 0.85	$ 0.53	$ 0.57
Anti-dilutive shares (in shares)	765,792	334,927	777,733

Parent-only Financial Informa_3

Parent-only Financial Information - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
ASSETS:
Interest-earning deposits in other financial institutions	$ 62,615	$ 40,393
Other assets	31,586	32,900
Total assets	4,408,432	3,991,417
LIABILITIES AND STOCKHOLDERS’ EQUITY:
Total liabilities	3,741,993	3,352,540
Total stockholders' equity	666,439	638,877	$ 621,196	$ 559,779
Total liabilities and stockholders' equity	4,408,432	3,991,417
Parent Company
ASSETS:
Cash in Northfield Bank	21,884	20,080
Interest-earning deposits in other financial institutions	21	21
Investment in Northfield Bank	623,113	594,385
ESOP loan receivable	22,962	24,021
Other assets	120	1,185
Total assets	668,100	639,692
LIABILITIES AND STOCKHOLDERS’ EQUITY:
Total liabilities	1,661	815
Total stockholders' equity	666,439	638,877
Total liabilities and stockholders' equity	$ 668,100	$ 639,692

Parent-only Financial Informa_4

Parent-only Financial Information - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income tax expense									$ 9,632	$ 26,978	$ 13,665
Net income									40,079	24,768	26,130
Other comprehensive loss, net of tax									(3,696)	(227)	(1,346)
Comprehensive income									36,383	24,541	24,784
Parent Company
Interest on ESOP loan									1,081	939	913
Interest income on deposit in Northfield Bank									38	31	31
(Losses) gains on securities, net									(6)	5	4
Undistributed earnings of Northfield Bank									40,092	24,887	26,303
Total income									41,205	25,862	27,251
Other expenses									890	872	936
Income tax expense	$ 2,314	$ 3,081	$ 1,893	$ 2,344	$ 15,686	$ 4,525	$ 3,807	$ 2,960	236	222	185
Total expense									1,126	1,094	1,121
Net income	$ 9,946	$ 9,076	$ 10,612	$ 10,445	$ (1,716)	$ 8,126	$ 8,410	$ 9,948	40,079	24,768	26,130
Other comprehensive loss, net of tax									(3,696)	(227)	(1,346)
Comprehensive income									$ 36,383	$ 24,541	$ 24,784

Parent-only Financial Informa_5

Parent-only Financial Information - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income									$ 40,079	$ 24,768	$ 26,130
Adjustments to reconcile net income to net cash provided by operating activities:
Decrease (increase) in other assets									3,563	(3,689)	3,052
Net cash provided by (used in) operating activities									52,789	43,624	37,701
Cash flows from investing activities:
Net cash provided by investing activities									(406,360)	(190,526)	(97,614)
Cash flows from financing activities:
Exercise of stock options									2,088	100	120
Additional tax benefit on stock awards									0	0	1,512
Net cash used in financing activities									373,494	108,656	104,145
Net increase (decrease) in cash and cash equivalents									19,923	(38,246)	44,232
Cash and cash equivalents at beginning of period				$ 57,839				$ 96,085	57,839	96,085	51,853
Cash and cash equivalents at end of period	$ 77,762				$ 57,839				77,762	57,839	96,085
Parent Company
Cash flows from operating activities:
Net income	9,946	$ 9,076	$ 10,612	10,445	(1,716)	$ 8,126	$ 8,410	9,948	40,079	24,768	26,130
Adjustments to reconcile net income to net cash provided by operating activities:
Decrease (increase) in other assets									3	(2,008)	(1,994)
Losses (gains) on securities, net									6	(5)	(4)
Increase (decrease) in other liabilities									846	(980)	1,238
Undistributed earnings of Northfield Bank									(40,092)	(24,887)	(26,303)
Net cash provided by (used in) operating activities									842	(3,112)	(933)
Cash flows from investing activities:
Cash consideration paid for business acquisition									0	0	(13,644)
Dividends from Northfield Bank									16,493	28,763	14,700
Net cash provided by investing activities									16,493	28,763	1,056
Cash flows from financing activities:
Principal payments on ESOP loan receivable									1,059	1,022	969
Purchase of treasury stock									(5)	0	(2,201)
Dividends paid									(18,673)	(15,646)	(14,074)
Exercise of stock options									2,088	100	120
Additional tax benefit on stock awards									0	0	1,512
Net cash used in financing activities									(15,531)	(14,524)	(13,674)
Net increase (decrease) in cash and cash equivalents									1,804	11,127	(13,551)
Cash and cash equivalents at beginning of period				$ 20,101				$ 8,974	20,101	8,974	22,525
Cash and cash equivalents at end of period	$ 21,905				$ 20,101				$ 21,905	$ 20,101	$ 8,974

Selected Quarterly Financial _3

Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest income									$ 147,292	$ 132,869	$ 124,972
Interest expense									36,050	23,976	21,668
Net interest income									111,242	108,893	103,304
Provision for loan losses									2,615	1,411	635
Net interest income after provision for loan losses									108,627	107,482	102,669
Other income									8,127	11,642	10,072
Other expenses									67,043	67,378	72,946
Income before income tax expense									49,711	51,746	39,795
Income tax expense									9,632	26,978	13,665
Net income									$ 40,079	$ 24,768	$ 26,130
Net income per basic common share (usd per share)									$ 0.87	$ 0.55	$ 0.59
Net income per diluted common share (usd per share)									$ 0.85	$ 0.53	$ 0.57
Parent Company
Interest income	$ 38,948	$ 37,727	$ 35,935	$ 34,682	$ 34,615	$ 33,525	$ 32,660	$ 32,069
Interest expense	10,944	9,803	8,165	7,138	6,660	6,173	5,751	5,392
Net interest income	28,004	27,924	27,770	27,544	27,955	27,352	26,909	26,677
Provision for loan losses	607	1,304	670	34	40	488	511	372
Net interest income after provision for loan losses	27,397	26,620	27,100	27,510	27,915	26,864	26,398	26,305
Other income	640	2,637	2,445	2,405	2,443	2,615	2,437	4,147
Other expenses	15,777	17,100	17,040	17,126	16,388	16,828	16,618	17,544
Income before income tax expense	12,260	12,157	12,505	12,789	13,970	12,651	12,217	12,908
Income tax expense	2,314	3,081	1,893	2,344	15,686	4,525	3,807	2,960	$ 236	$ 222	$ 185
Net income	$ 9,946	$ 9,076	$ 10,612	$ 10,445	$ (1,716)	$ 8,126	$ 8,410	$ 9,948	$ 40,079	$ 24,768	$ 26,130
Net income per basic common share (usd per share)	$ 0.21	$ 0.19	$ 0.23	$ 0.23	$ (0.04)	$ 0.18	$ 0.19	$ 0.22
Net income per diluted common share (usd per share)	$ 0.21	$ 0.19	$ 0.23	$ 0.22	$ (0.04)	$ 0.17	$ 0.18	$ 0.21

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from Contract with Customer [Abstract]
Service charges	$ 3,356	$ 3,320	$ 3,516
ATM and card interchange fees	1,216	1,150	1,130
Investment fees	305	232	288
Total fees and service charges for customer services	4,877	4,702	4,934
Income on bank owned life insurance(1)	3,705	5,386	3,998
(Losses) gains on securities, net(1)	(701)	1,283	813
Other1	246	271	327
Total non-interest income	$ 8,127	$ 11,642	$ 10,072