Northfield Bancorp, Inc. (NFBK) 10-Q 10 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 30, 2018
Document And Entity Information [Abstract]
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
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		49,132,059

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS:
Cash and due from banks	$ 16,269	$ 17,446
Interest-bearing deposits in other financial institutions	36,305	40,393
Total cash and cash equivalents	52,574	57,839
Trading securities	9,822	9,597
Debt securities available-for-sale, at estimated fair value	592,574	513,782
Debt securities held-to-maturity, at amortized cost (estimated fair value of $9,636 at March 31, 2018, and $9,892 at December 31, 2017)	9,873	9,931
Equity securities	1,194	1,339
Originated loans held-for-investment, net	2,427,755	2,425,275
Loans acquired	696,695	692,803
Purchased credit-impaired (“PCI”) loans held-for-investment	22,084	22,741
Loans held-for-investment, net	3,146,534	3,140,819
Allowance for loan losses	(26,172)	(26,160)
Net loans held-for-investment	3,120,362	3,114,659
Accrued interest receivable	11,125	10,713
Bank owned life insurance	151,386	150,604
Federal Home Loan Bank of New York stock, at cost	24,433	25,046
Premises and equipment, net	25,285	25,746
Goodwill	38,411	38,411
Other real estate owned	850	850
Other assets	31,320	32,900
Total assets	4,069,209	3,991,417
LIABILITIES:
Deposits	2,905,076	2,836,979
Borrowed funds	456,272	471,549
Advance payments by borrowers for taxes and insurance	18,206	14,798
Accrued expenses and other liabilities	46,837	29,214
Total liabilities	3,426,391	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 March 31, 2018 and December 31, 2017, 49,126,879 and 48,803,885 outstanding at March 31, 2018, and December 31, 2017, respectively	609	609
Additional paid-in-capital	546,844	548,864
Unallocated common stock held by employee stock ownership plan	(21,992)	(22,244)
Retained earnings	286,942	281,138
Accumulated other comprehensive loss	(9,915)	(5,451)
Treasury stock at cost; 11,806,828 and 12,129,822 shares at March 31, 2018, and December 31, 2017, respectively	(159,670)	(164,039)
Total stockholders’ equity	642,818	638,877
Total liabilities and stockholders’ equity	$ 4,069,209	$ 3,991,417

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Estimated Fair Value	$ 9,636	$ 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)	49,126,879	48,803,885
Treasury stock, shares (shares)	11,806,828	12,129,822

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest income:
Loans	$ 30,787	$ 29,008
Mortgage-backed securities	2,726	2,356
Other securities	502	252
Federal Home Loan Bank of New York dividends	414	371
Deposits in other financial institutions	253	82
Total interest income	34,682	32,069
Interest expense:
Deposits	5,211	3,620
Borrowings	1,927	1,772
Total interest expense	7,138	5,392
Net interest income	27,544	26,677
Provision for loan losses	34	372
Net interest income after provision for loan losses	27,510	26,305
Non-interest income:
Fees and service charges for customer services	1,214	1,218
Income on bank owned life insurance	954	2,458
Gains on securities transactions, net	161	408
Other	76	63
Total non-interest income	2,405	4,147
Non-interest expense:
Compensation and employee benefits	9,117	9,972
Occupancy	3,096	2,957
Furniture and equipment	256	305
Data processing	1,224	1,161
Professional fees	763	870
FDIC insurance	297	258
Other	2,373	2,021
Total non-interest expense	17,126	17,544
Income before income tax expense	12,789	12,908
Income tax expense	2,344	2,960
Net income	$ 10,445	$ 9,948
Net income per common share:
Basic (usd per share)	$ 0.23	$ 0.22
Diluted (usd per share)	$ 0.22	$ 0.21
Unrealized gains (losses) on securities:
Net unrealized holding (losses) gains on securities	$ (6,153)	$ 979
Less: reclassification adjustment for net gains included in net income (included in gains on securities transactions, net)	(55)	0
Net unrealized (losses) gains	(6,208)	979
Amortization related to post retirement benefit obligation	0	27
Other comprehensive (loss) income, before tax	(6,208)	1,006
Income tax benefit (expense) related to net unrealized holding (losses) gains on securities	1,729	(391)
Income tax benefit (expense) related to reclassification adjustment for (losses) gains included in net income	15	0
Other comprehensive (loss) income, net of tax	(4,464)	604
Comprehensive income	$ 5,981	$ 10,552

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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principle - adoption of ASU No. 2016-09	$ 0		$ (2,898)		$ 2,898
Beginning Balance (shares) at Dec. 31, 2016		48,526,658
Beginning Balance at Dec. 31, 2016	621,196	$ 609	547,910	$ (23,466)	268,226	$ (4,332)	$ (167,751)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,948				9,948
Other comprehensive income, net of tax	604					604
ESOP shares allocated or committed to be released	571		317	254
Stock compensation expense	1,636		1,636
Exercise of stock options, net (shares)		317,221
Exercise of stock options, net	92		(4,113)				4,205
Cash dividends declared	(3,666)				(3,666)
Ending Balance at Mar. 31, 2017	630,381	$ 609	542,852	(23,212)	277,406	(3,728)	(163,546)
Ending Balance (shares) at Mar. 31, 2017		48,843,879
Beginning Balance (shares) at Dec. 31, 2017		48,803,885
Beginning Balance at Dec. 31, 2017	638,877	$ 609	548,864	(22,244)	281,138	(5,451)	(164,039)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,445				10,445
Other comprehensive income, net of tax	(4,464)					(4,464)
ESOP shares allocated or committed to be released	503		251	252
Stock compensation expense	1,373		1,373
Forfeitures of restricted stock (shares)		(600)
Forfeitures of restricted stock	$ 0		8				(8)
Exercise of stock options, net (shares)	530,180	323,594
Exercise of stock options, net	$ 725		(3,652)				4,377
Cash dividends declared	(4,641)				(4,641)
Ending Balance at Mar. 31, 2018	$ 642,818	$ 609	$ 546,844	$ (21,992)	$ 286,942	$ (9,915)	$ (159,670)
Ending Balance (shares) at Mar. 31, 2018		49,126,879

Consolidated Statements Of Cha6

Consolidated Statements Of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Stockholders' Equity [Abstract]
Dividends declared per share (usd per share)	$ 0.10	$ 0.08

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 10,445	$ 9,948
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	34	372
ESOP and stock compensation expense	1,876	2,207
Depreciation	768	838
Amortization of premiums, and deferred loan costs, net of (accretion) of discounts, and deferred loan fees	616	500
Amortization of intangible assets	84	98
Income on bank owned life insurance	(954)	(2,458)
Gains on securities transactions, net	(161)	(408)
Net purchases of trading securities	(119)	(131)
Increase in accrued interest receivable	(412)	(80)
Decrease in other assets	3,410	2,130
Decrease in accrued expenses and other liabilities	(1,985)	(3,221)
Net cash provided by operating activities	13,602	9,795
Cash flows from investing activities:
Net decrease (increase) in loans receivable	31,471	(66,192)
Purchase of loans	(37,593)	0
Purchases of Federal Home Loan Bank of New York stock	6,463	(5,400)
Redemptions of Federal Home Loan Bank of New York stock	(5,850)	4,230
Purchases of debt securities available-for-sale	(111,726)	(4)
Principal payments and maturities on debt securities available-for-sale	26,801	28,527
Principal payments and maturities on debt securities held-to-maturity	54	52
Proceeds from sale of debt securities available-for-sale	19,508	0
Purchases and improvements of premises and equipment	(307)	(111)
Net cash used in investing activities	(71,179)	(38,898)
Cash flows from financing activities:
Net increase in deposits	68,097	(37,317)
Dividends paid	(4,641)	(3,666)
Exercise of stock options	725	92
Increase in advance payments by borrowers for taxes and insurance	3,408	2,978
Repayments under capital lease obligations	(60)	(54)
Proceeds from securities sold under agreements to repurchase and other borrowings	275,418	98,294
Repayments related to securities sold under agreements to repurchase and other borrowings	(290,635)	(76,003)
Net cash provided by (used in) financing activities	52,312	(15,676)
Net decrease in cash and cash equivalents	(5,265)	(44,779)
Cash and cash equivalents at beginning of period	57,839	96,085
Cash and cash equivalents at end of period	52,574	51,306
Cash paid during the period for:
Interest	6,895	5,506
Income taxes	667	2,900
Non-cash transactions:
Loans charged-off/(recoveries), net	22	(316)
Increase in accrued expenses and other liabilities for purchases of debt securities available-for-sale - amount due to broker	$ 19,608	$ 0

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements are comprised of the accounts of Northfield Bancorp, Inc. (the “ Company ” ) and its wholly owned subsidiaries, Northfield Investments, 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 the opinion of management, all adjustments (consisting solely of normal and recurring adjustments) necessary for the fair presentation of the consolidated financial condition and the consolidated results of operations for the unaudited periods presented have been included. The results of operations and other data presented for the three months ended March 31, 2018 , are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2018 or for any other period. Whenever necessary, certain prior year amounts are reclassified to conform to the current year presentation. In preparing the unaudited consolidated financial statements in conformity with U.S. generally accepted accounting principles (U.S. GAAP), management has made estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated statements of financial condition and results of operations for the periods indicated. Material estimates that are particularly susceptible to change are: the allowance for loan losses, the evaluation of goodwill and other intangible assets, impairment on investment securities, fair value measurements of assets and liabilities, and income taxes. Estimates and assumptions are reviewed periodically and the effects of revisions are reflected in the consolidated financial statements in the period they are deemed necessary. While management uses its best judgment, actual amounts or results could differ significantly from those estimates. Certain information and note disclosures usually included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) for the preparation of interim financial statements. The consolidated financial statements presented should be read in conjunction with the audited consolidated financial statements and notes to consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2017 , of the Company as filed with the SEC.

Debt Securities Available-for-S

Debt Securities Available-for-Sale	3 Months Ended
	Mar. 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 and other debt securities available-for-sale at March 31, 2018 , and December 31, 2017 (in thousands): March 31, 2018 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises (GSE) $ 215,952 $ 670 $ 4,396 $ 212,226 Real estate mortgage investment conduits (REMICs): GSE 272,524 68 9,620 262,972 Non-GSE 78 — 1 77 488,554 738 14,017 475,275 Other debt securities: Municipal bonds 326 5 — 331 Corporate bonds 117,291 461 784 116,968 117,617 466 784 117,299 Total debt securities available-for-sale $ 606,171 $ 1,204 $ 14,801 $ 592,574 December 31, 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 March 31, 2018 (in thousands): Available-for-sale Amortized cost Estimated fair value Due after one year through five years $ 107,732 $ 107,425 Due after five years through ten years 9,885 9,874 $ 117,617 $ 117,299 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 March 31, 2018 , the fair value of securities available-for-sale that were pledged to secure borrowings and deposits was $361.9 million . For the three months ended March 31, 2018 , the Company had gross proceeds of $19.5 million on sales of debt securities available-for-sale, with gross realized gains of $60,000 and gross realized losses of $5,000 . There were no sales of debt securities available-for-sale for the three months ended March 31, 2017. The Company recognized net gains of $106,000 and $408,000 , on its trading securities portfolio during the three months ended March 31, 2018 , and March 31, 2017 , respectively. The Company did no t recognize any other-than-temporary impairment charges during the three months ended March 31, 2018 , or March 31, 2017 . Gross unrealized losses on mortgage-backed 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 March 31, 2018 , and December 31, 2017 , were as follows (in thousands): March 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 $ 1,098 $ 83,938 $ 3,298 $ 79,205 $ 4,396 $ 163,143 REMICs: GSE 2,257 123,851 7,363 122,544 9,620 246,395 Non-GSE — — 1 77 1 77 Other debt securities: Corporate bonds 383 40,441 401 14,800 784 55,241 Total $ 3,738 $ 248,230 $ 11,063 $ 216,626 $ 14,801 $ 464,856 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 33 pass-through mortgage-backed securities issued or guaranteed by GSEs, 16 REMIC mortgage-backed securities issued or guaranteed by GSEs, one REMIC mortgage-backed security not issued or guaranteed by a GSE, and three corporate bonds that were in a continuous unrealized loss position of twelve months or greater at March 31, 2018 . There were 36 pass-through mortgage-backed securities issued or guaranteed by GSEs, 38 REMIC mortgage-backed securities issued or guaranteed by a GSE, and eight corporate bonds that were in an unrealized loss position of less than twelve months at March 31, 2018 . All securities referred to above were rated investment grade at March 31, 2018 . 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 substantially 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, which may result in other-than-temporary impairment in the future. Equity Securities At March 31, 2018, and December 31, 2017, equity securities totaled $1.2 million and $1.3 million , respectively. Equity securities consist of money market mutual funds, recorded at fair value, and an investment in a private Small Business Administration ( “SBA”) Loan Fund. 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 Accounting Standards Update (“ASU”) No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities as of 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 12 - “Recently Issued and Adopted Accounting Pronouncements.”

Debt Securities Held-to-Maturit

Debt Securities Held-to-Maturity	3 Months Ended
	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Debt Securities Held-to-Maturity	Debt Securities Held-to-Maturity The following is a summary of debt securities held-to-maturity at March 31, 2018 , and December 31, 2017 (in thousands): March 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 9,873 $ — $ 237 $ 9,636 Total securities held-to-maturity $ 9,873 $ — $ 237 $ 9,636 December 31, 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 may 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 three months ended March 31, 2018 , or March 31, 2017 . The Company did no t recognize any other-than-temporary impairment charges in earnings on securities held-to-maturity during the three months ended March 31, 2018 , or March 31, 2017 . At March 31, 2018 , debt securities held-to-maturity with a carrying value of $9.9 million were pledged to secure borrowings 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 March 31, 2018 and December 31, 2017 , were as follows (in thousands): March 31, 2018 Less than 12 months 12 months or more Total Unrealized losses Estimated fair value Unrealized losses Estimated fair value Unrealized losses Estimated fair value Mortgage-backed securities: Pass-through certificates: GSEs $ 113 $ 5,998 $ 124 $ 3,638 $ 237 $ 9,636 Total securities held-to-maturity $ 113 $ 5,998 $ 124 $ 3,638 $ 237 $ 9,636 December 31, 2017 Less than 12 months 12 months or more Total Unrealized losses Estimated fair value Unrealized losses Estimated fair value Unrealized losses Estimated fair value Mortgage-backed securities: Pass-through certificates: GSEs $ 7 $ 3,922 $ 49 $ 3,735 $ 56 $ 7,657 Total securities held-to-maturity $ 7 $ 3,922 $ 49 $ 3,735 $ 56 $ 7,657 The Company held two pass-through mortgage-backed securities held-to-maturity, issued or guaranteed by GSE's that were in a continuous unrealized loss position of greater than twelve months at March 31, 2018 , and four pass-through mortgage-backed securities held-to-maturity, issued or guaranteed by GSE's that were in a continuous unrealized loss position of less than twelve months at March 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 substantially 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	3 Months Ended
	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Equity Securities	Debt Securities Available-for-Sale The following is a comparative summary of mortgage-backed and other debt securities available-for-sale at March 31, 2018 , and December 31, 2017 (in thousands): March 31, 2018 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises (GSE) $ 215,952 $ 670 $ 4,396 $ 212,226 Real estate mortgage investment conduits (REMICs): GSE 272,524 68 9,620 262,972 Non-GSE 78 — 1 77 488,554 738 14,017 475,275 Other debt securities: Municipal bonds 326 5 — 331 Corporate bonds 117,291 461 784 116,968 117,617 466 784 117,299 Total debt securities available-for-sale $ 606,171 $ 1,204 $ 14,801 $ 592,574 December 31, 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 March 31, 2018 (in thousands): Available-for-sale Amortized cost Estimated fair value Due after one year through five years $ 107,732 $ 107,425 Due after five years through ten years 9,885 9,874 $ 117,617 $ 117,299 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 March 31, 2018 , the fair value of securities available-for-sale that were pledged to secure borrowings and deposits was $361.9 million . For the three months ended March 31, 2018 , the Company had gross proceeds of $19.5 million on sales of debt securities available-for-sale, with gross realized gains of $60,000 and gross realized losses of $5,000 . There were no sales of debt securities available-for-sale for the three months ended March 31, 2017. The Company recognized net gains of $106,000 and $408,000 , on its trading securities portfolio during the three months ended March 31, 2018 , and March 31, 2017 , respectively. The Company did no t recognize any other-than-temporary impairment charges during the three months ended March 31, 2018 , or March 31, 2017 . Gross unrealized losses on mortgage-backed 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 March 31, 2018 , and December 31, 2017 , were as follows (in thousands): March 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 $ 1,098 $ 83,938 $ 3,298 $ 79,205 $ 4,396 $ 163,143 REMICs: GSE 2,257 123,851 7,363 122,544 9,620 246,395 Non-GSE — — 1 77 1 77 Other debt securities: Corporate bonds 383 40,441 401 14,800 784 55,241 Total $ 3,738 $ 248,230 $ 11,063 $ 216,626 $ 14,801 $ 464,856 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 33 pass-through mortgage-backed securities issued or guaranteed by GSEs, 16 REMIC mortgage-backed securities issued or guaranteed by GSEs, one REMIC mortgage-backed security not issued or guaranteed by a GSE, and three corporate bonds that were in a continuous unrealized loss position of twelve months or greater at March 31, 2018 . There were 36 pass-through mortgage-backed securities issued or guaranteed by GSEs, 38 REMIC mortgage-backed securities issued or guaranteed by a GSE, and eight corporate bonds that were in an unrealized loss position of less than twelve months at March 31, 2018 . All securities referred to above were rated investment grade at March 31, 2018 . 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 substantially 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, which may result in other-than-temporary impairment in the future. Equity Securities At March 31, 2018, and December 31, 2017, equity securities totaled $1.2 million and $1.3 million , respectively. Equity securities consist of money market mutual funds, recorded at fair value, and an investment in a private Small Business Administration ( “SBA”) Loan Fund. 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 Accounting Standards Update (“ASU”) No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities as of 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 12 - “Recently Issued and Adopted Accounting Pronouncements.”

Loans

Loans	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Loans	Loans Net loans held-for-investment are as follows (in thousands): March 31, December 31, 2018 2017 Real estate loans: Multifamily $ 1,740,244 $ 1,735,712 Commercial mortgage 446,276 445,225 One-to-four family residential mortgage 98,907 100,942 Home equity and lines of credit 67,623 66,254 Construction and land 28,894 34,545 Total real estate loans 2,381,944 2,382,678 Commercial and industrial loans 37,388 34,828 Other loans 1,673 1,430 Total commercial and industrial and other loans 39,061 36,258 Deferred loan cost, net 6,750 6,339 Originated loans held-for-investment, net 2,427,755 2,425,275 PCI Loans 22,084 22,741 Loans acquired: One-to-four family residential mortgage 289,071 275,053 Multifamily 197,712 199,149 Commercial mortgage 159,853 163,962 Home equity and lines of credit 19,449 20,455 Construction and land 14,928 17,201 Total acquired real estate loans 681,013 675,820 Commercial and industrial loans 15,659 16,946 Other loans 23 37 Total loans acquired, net 696,695 692,803 Loans held-for-investment, net 3,146,534 3,140,819 Allowance for loan losses (26,172 ) (26,160 ) Net loans held-for-investment $ 3,120,362 $ 3,114,659 There were no loans held-for-sale at March 31, 2018 , or December 31, 2017 . PCI loans totaled $22.1 million at March 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 a Federal Deposit Insurance Corporation-assisted transaction. The Company accounts for PCI loans utilizing U.S. GAAP applicable to loans acquired with deteriorated credit quality. At March 31, 2018 , PCI loans consist of approximately 27% commercial real estate loans and 50% commercial and industrial loans, with the remaining balance in residential and home equity loans. At December 31, 2017 , PCI loans consist 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 details the accretion of interest income for PCI loans for the three months ended March 31, 2018 and March 31, 2017 (in thousands): At or for the three months ended March 31, 2018 2017 Balance at the beginning of period $ 24,502 $ 24,215 Accretion into interest income (1,090 ) (1,452 ) Balance at end of period $ 23,412 $ 22,763 The following tables set forth activity in our allowance for loan losses, by loan type, as of and for the three months ended March 31, 2018 , and March 31, 2017 (in thousands): Three Months Ended March 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 Purchased Credit-Impaired 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 (3 ) — — — (60 ) — — — (63 ) — (1 ) (64 ) Recoveries 16 — — — — 20 — — 36 — 6 42 Provisions (credit) 4 (48 ) (147 ) 38 163 44 19 — 73 — (39 ) 34 Ending balance $ 5,213 $ 455 $ 463 $ 17,412 $ 225 $ 1,337 $ 113 $ — $ 25,218 $ 951 $ 3 $ 26,172 Three Months Ended March 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 Purchased Credit-Impaired 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 ) — — — — — — — (4 ) — (23 ) (27 ) Recoveries 17 — — 278 — 47 — — 342 — 2 344 Provisions (credit) (214 ) (15 ) (7 ) 954 (96 ) (206 ) (24 ) — 392 — (20 ) 372 Ending balance $ 5,231 $ 649 $ 165 $ 16,184 $ 492 $ 1,561 $ 72 $ — $ 24,354 $ 896 $ 34 $ 25,284 The following tables detail 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 the allowance for loan losses that is allocated to each loan portfolio segment, at March 31, 2018 , and December 31, 2017 (in thousands): March 31, 2018 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Originated Loans Total Purchased Credit-Impaired Acquired Loans Total Allowance for loan losses: Ending balance: individually evaluated for impairment $ 4 $ 35 $ — $ — $ 10 $ 3 $ — $ 52 $ — $ 3 $ 55 Ending balance: collectively evaluated for impairment $ 5,209 $ 420 $ 463 $ 17,412 $ 215 $ 1,334 $ 113 $ 25,166 $ 951 $ — $ 26,117 Loans, net: Ending balance $ 446,879 $ 99,991 $ 28,965 $ 1,743,665 $ 69,112 $ 37,470 $ 1,673 $ 2,427,755 $ 22,084 $ 696,695 $ 3,146,534 Ending balance: individually evaluated for impairment $ 15,873 $ 1,977 $ — $ 1,292 $ 67 $ 155 $ — $ 19,364 $ — $ 1,225 $ 20,589 Ending balance: collectively evaluated for impairment $ 431,006 $ 98,014 $ 28,965 $ 1,742,373 $ 69,045 $ 37,315 $ 1,673 $ 2,408,391 $ 22,084 $ 695,470 $ 3,125,945 December 31, 2017 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Originated Loans Total Purchased Credit-Impaired Acquired Loans Total Allowance for loan losses: 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 tables detail the recorded investment of originated loans held-for-investment, net of deferred fees and costs, by loan type and credit quality indicator at March 31, 2018 , and December 31, 2017 (in thousands): March 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 $ 133,669 $ 1,606,547 $ 57,900 $ 374,775 $ 60,442 $ 36,829 $ 28,965 $ 68,862 $ 36,756 $ 1,673 $ 2,406,418 Special Mention — 633 406 1,168 678 — — 28 536 — 3,449 Substandard — 2,816 — 12,630 1,456 586 — 222 178 — 17,888 Originated loans held-for-investment, net $ 133,669 $ 1,609,996 $ 58,306 $ 388,573 $ 62,576 $ 37,415 $ 28,965 $ 69,112 $ 37,470 $ 1,673 $ 2,427,755 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 (including loans held-for-sale) 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 $5.6 million and $5.5 million at March 31, 2018 , and December 31, 2017 , respectively. Generally, loans are placed on non-accrual 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. These non-accrual amounts included loans deemed to be impaired of $3.0 million and $3.1 million at March 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 $2.6 million and $2.4 million at March 31, 2018 , and December 31, 2017 , respectively. There were no non-accrual loans held-for-sale at March 31, 2018 and December 31, 2017 . Loans past due 90 days or more and still accruing interest were $58,000 and $28,000 at March 31, 2018 , and December 31, 2017 , respectively, and consisted of loans that are considered well-secured and in the process of collection. The following tables set forth the detail, and delinquency status, of non-performing loans (non-accrual loans and loans past due 90 days or more and still accruing), net of deferred fees and costs, at March 31, 2018 , and December 31, 2017 , excluding loans held-for-sale and 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 (in thousands): March 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 $ — $ 725 $ 2,304 $ 3,029 $ — $ 3,029 Total commercial — 725 2,304 3,029 — 3,029 One-to-four family residential LTV < 60% Substandard — 203 328 531 — 531 Total — 203 328 531 — 531 LTV => 60% Substandard — — 38 38 — 38 Total one-to-four family residential — 203 366 569 — 569 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 79 928 2,742 3,749 — 3,749 Loans acquired: Real estate loans: Commercial LTV < 35% Substandard — — 294 294 — 294 LTV => 35% Substandard — 771 58 829 — 829 Total commercial — 771 352 1,123 — 1,123 One-to-four family residential LTV < 60% Substandard 1 200 27 228 58 286 Total one-to-four family residential 1 200 27 228 58 286 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 Total non-performing loans acquired 1 1,416 428 1,845 58 1,903 Total non-performing loans $ 80 $ 2,344 $ 3,170 $ 5,594 $ 58 $ 5,652 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 loans Substandard — — 2 2 — 2 Total commercial and industrial loans — — 2 2 — 2 Other loans - Pass — — — — 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 tables set forth the detail and delinquency status of originated and acquired loans held-for-investment, net of deferred fees and costs, by performing and non-performing loans at March 31, 2018 , and December 31, 2017 (in thousands): March 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 $ 57,674 $ 226 $ 57,900 $ — $ 57,900 Special Mention — 406 406 — 406 Total 57,674 632 58,306 — 58,306 LTV => 35% Pass 374,775 — 374,775 — 374,775 Special Mention 824 344 1,168 — 1,168 Substandard 7,632 1,969 9,601 3,029 12,630 Total 383,231 2,313 385,544 3,029 388,573 Total commercial 440,905 2,945 443,850 3,029 446,879 One-to-four family residential LTV < 60% Pass 58,022 2,420 60,442 — 60,442 Special Mention — 678 678 — 678 Substandard 925 — 925 531 1,456 Total 58,947 3,098 62,045 531 62,576 LTV => 60% Pass 36,829 — 36,829 — 36,829 Substandard 548 — 548 38 586 Total 37,377 — 37,377 38 37,415 Total one-to-four family residential 96,324 3,098 99,422 569 99,991 Construction and land Pass 28,965 — 28,965 — 28,965 Total construction and land 28,965 — 28,965 — 28,965 Multifamily LTV < 35% Pass 133,669 — 133,669 — 133,669 Total 133,669 — 133,669 — 133,669 LTV => 35% Pass 1,605,986 561 1,606,547 — 1,606,547 Special Mention 633 — 633 — 633 Substandard 1,572 1,244 2,816 — 2,816 Total 1,608,191 1,805 1,609,996 — 1,609,996 Total multifamily 1,741,860 1,805 1,743,665 — 1,743,665 Home equity and lines of credit Pass 68,396 466 68,862 — 68,862 Special Mention 28 — 28 — 28 Substandard 143 — 143 79 222 Total home equity and lines of credit 68,567 466 69,033 79 69,112 Commercial and industrial Pass 36,664 92 36,756 — 36,756 Special Mention 536 — 536 — 536 Substandard 106 — 106 72 178 Total commercial and industrial 37,306 92 37,398 72 37,470 March 31, 2018 Performing (Accruing) Loans (Continued) 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Other loans - Pass 1,644 29 1,673 — 1,673 Total originated loans held-for-investment 2,415,571 8,435 2,424,006 3,749 2,427,755 Acquired loans: One-to-four family residential LTV < 60% Pass 261,242 1,820 263,062 — 263,062 Special Mention 435 — 435 — 435 Substandard 65 129 194 286 480 Total 261,742 1,949 263,691 286 263,977 LTV => 60% Pass 24,867 94 24,961 — 24,961 Substandard 133 — 133 — 133 Total 25,000 94 25,094 — 25,094 Total one-to-four family residential 286,742 2,043 288,785 286 289,071 Commercial LTV < 35% Pass 49,236 70 49,306 — 49,306 Special Mention 90 — 90 — 90 Substandard 84 — 84 294 378 Total 49,410 70 49,480 294 49,774 LTV => 35% Pass 104,388 635 105,023 — 105,023 Special Mention — 132 132 — 132 Substandard 3,670 425 4,095 829 4,924 Total 108,058 1,192 109,250 829 110,079 Total commercial 157,468 1,262 158,730 1,123 159,853 Construction and land Pass 14,336 592 14,928 — 14,928 Total construction and land 14,336 592 14,928 — 14,928 Multifamily LTV < 35% Pass 188,186 — 188,186 — 188,186 Special Mention 71 — 71 — 71 Substandard — 152 152 — 152 Total 188,257 152 188,409 — 188,409 LTV => 35% Pass 8,886 — 8,886 — 8,886 Substandard — — — 417 417 Total 8,886 — 8,886 417 9,303 Total multifamily 197,143 152 197,295 417 197,712 Home equity and lines of credit Pass 19,207 80 19,287 — 19,287 Substandard 85 — 85 77 162 Total home equity and lines of credit 19,292 80 19,372 77 19,449 Commercial and industrial Pass 15,659 — 15,659 — 15,659 Total commercial and industrial 15,659 — 15,659 — 15,659 Other loans - Pass 23 — 23 — 23 Total loans acquired 690,663 4,129 694,792 1,903 696,695 $ 3,106,234 $ 12,564 $ 3,118,798 $ 5,652 $ 3,124,450 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 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 Real estate loans: 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 Pass 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 Substandard — — — 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 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 impaired loans as of March 31, 2018 , and December 31, 2017 (in thousands): March 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 4,695 5,581 — 6,263 7,150 — Substandard 9,692 10,508 — 9,745 10,560 — One-to-four family residential LTV < 60% Pass 1,177 1,245 — 1,189 1,254 — Substandard 252 252 — 251 251 — LTV => 60% Pass 402 427 — 136 161 — Substandard 133 285 — 135 286 — Multifamily LTV < 35% Substandard 152 152 — 153 153 — LTV => 35% Pass 48 518 — 1,309 1,780 Substandard 1,244 1,244 — — — — Home equity and lines of credit Pass 32 32 — 33 33 — Commercial and industrial loans Substandard 132 132 — 135 135 — With a Related Allowance Recorded: Real estate loans: Commercial LTV => 35% Pass 1,486 1,486 (4 ) — — — One-to-four family residential LTV < 60% Pass 408 408 (3 ) 411 411 (7 ) Substandard 678 678 (35 ) 997 997 (49 ) LTV => 60% Pass — — — 268 268 (19 ) Home equity and lines of credit Substandard 35 35 (10 ) 36 36 (4 ) Commercial and industrial loans Special Mention 23 23 (3 ) 24 24 (3 ) Total: Real estate loans Commercial 15,873 17,714 (4 ) 16,008 17,849 — One-to-four family residential 3,050 3,295 (38 ) 3,387 3,628 (75 ) Multifamily 1,444 1,914 — 1,462 1,933 — Home equity and lines of credit 67 67 (10 ) 69 69 (4 ) Commercial and industrial loans 155 155 (3 ) 159 159 (3 ) $ 20,589 $ 23,145 $ (55 ) $ 21,085 $ 23,638 $ (82 ) Included in the above table at March 31, 2018 , are impaired loans with carrying balances of $13.2 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 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. Loans not written down by charge-offs or specific reserves at March 31, 2018 , and December 31, 2017 , are considered to have sufficient collateral values, less costs to sell, to support the carrying balances of the loans. The following table summarizes the average recorded investment in originated and acquired impaired loans (excluding PCI loans) and interest recognized on impaired loans as of, and for, the three months ended March 31, 2018 , and March 31, 2017 (in thousands): Three Months Ended March 31, 2018 March 31, 2017 Average Recorded Investment Interest Income Average Recorded Investment Interest Income With No Allowance Recorded: Real estate loans: Commercial LTV < 35% Substandard $ — $ — $ — $ 5 LTV => 35% Pass 5,479 64 4,890 64 Substandard 9,718 75 13,699 128 One-to-four family residential LTV < 60% Pass 1,183 13 630 8 Substandard 252 1 386 8 LTV => 60% Pass 269 4 — — Substandard 134 3 450 5 Multifamily LTV < 35% Substandard 152 1 155 1 LTV => 35% Pass 679 4 61 4 Substandard 622 11 — — Home equity and lines of credit Pass 33 1 38 1 Commercial and industrial loans Substandard 134 — 110 — With a Related Allowance Recorded: Real estate loans: Commercial Pass 743 20 — — Substandard — — 1,010 — One-to-four family residential LTV < 60% Pass 409 2 — — Substandard 837 4 1,308 7 LTV => 60% Pass 134 — 274 4 Substandard — — 379 1 Multifamily LTV => 35% Pass — — 1,302 12 Substandard — — 450 — Three Months Ended March 31, 2018 March 31, 2017 Average Recorded Investment Interest Income Average Recorded Investment Interest Income Home equity and lines of credit Pass — — 257 2 Substandard 35 — 38 — Commercial and industrial loans Special Mention 24 — 26 — Total: Real estate loans Commercial 15,940 159 19,599 197 One-to-four family residential 3,218 27 3,427 33 Multifamily 1,453 16 1,968 17 Home equity and lines of credit 68 1 333 3 Commercial and industrial loans 158 — 136 — $ 20,837 $ 203 $ 25,463 $ 250 There were no loans modified as troubled debt restructurings (TDRs) during the three months ended March 31, 2018. There was one one-to-four family residential loan modified as a TDR during the three months ended March 31, 2017. This loan had a pre- and post-modification balance of $256,000 as of the date of modification, and was restructured to receive a reduced interest rate. At March 31, 2018 , and December 31, 2017 , we had TDRs of $17.8 million and $18.3 million , respectively. Management classifies all TDRs as impaired loans. Impaired loans are individually assessed to determine that the loan’s carrying value is not in excess of the estimated fair value of the collateral less cost to sell, if the loan is collateral dependent, or the present value of the expected future cash flows, if the loan is not collateral dependent. Management performs an evaluation of each impaired loan and generally obtains updated appraisals as part of the evaluation. In addition, management adjusts estimated fair values down to appropriately consider recent market conditions, our willingness to accept a lower sales price to effect a quick sale, and costs to dispose of any supporting collateral. Determining the estimated fair value of underlying collateral (and related costs to sell) can be difficult in illiquid real estate markets and is subject to significant assumptions and estimates. Management employs an independent third-party management firm that specializes in appraisal preparation and review to ascertain the reasonableness of updated appraisals. Projecting the expected cash flows under troubled debt restructurings which are not collateral dependent is inherently subjective and requires, among other things, an evaluation of the borrower’s current and projected financial condition. Actual results may be significantly different than our projections and our established allowance for loan losses on these loans, which could have a material effect on our financial results. At March 31, 2018 , there were no TDR loans that were restructured during the preceding twelve months ended March 31, 2018, that subsequently defaulted. At March 31, 2017, there was one one-to-four family residential TDR loan that was restructured during the preceding twelve months ended March 31, 2017, that subsequently defaulted. The loan had a recorded investment of $254,000 , was 90 days or more past due, and on non-accrual status at March 31, 2017.

Deposits

Deposits	3 Months Ended
	Mar. 31, 2018
Banking and Thrift [Abstract]
Deposits	Deposits Deposits account balances are summarized as follows (in thousands): March 31, 2018 December 31, 2017 Non-interest-bearing demand $ 405,917 $ 407,267 Interest-bearing negotiable orders of withdrawal (NOW) 480,466 465,140 Savings and money market 1,190,872 1,225,643 Certificates of deposit 827,821 738,929 Total deposits $ 2,905,076 $ 2,836,979 Interest expense on deposit accounts is summarized for the periods indicated (in thousands): Three Months Ended March 31, 2018 2017 Negotiable orders of withdrawal, savings, and money market $ 2,143 $ 2,030 Certificates of deposit 3,068 1,590 Total interest expense on deposit accounts $ 5,211 $ 3,620

Equity Incentive Plan

Equity Incentive Plan	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Incentive Plan	Equity Incentive Plan The following table is a summary of the Company’s stock options outstanding as of March 31, 2018 , and changes therein during the three months then ended. Number of Stock Options Weighted Average Grant Date Fair Value Weighted Average Exercise Price Weighted Average Contractual Life (years) Outstanding - December 31, 2017 4,620,687 $ 3.51 $ 11.82 5.17 Forfeited (14,318 ) 2.65 8.51 — Exercised (530,180 ) 2.56 7.91 — Outstanding - March 31, 2018 4,076,189 3.63 12.34 5.37 Exercisable - March 31, 2018 2,577,157 3.40 11.35 4.53 Expected future stock option expense related to the non-vested options outstanding as of March 31, 2018 , is $3.2 million over a weighted average period of 1.66 years. The following is a summary of the status of the Company’s restricted stock awards as of March 31, 2018 , and changes therein during the three months then ended. Number of Shares Awarded Weighted Average Grant Date Fair Value Non-vested at December 31, 2017 585,895 $ 14.05 Forfeited (600 ) 13.13 Non-vested at March 31, 2018 585,295 $ 14.05 Expected future stock award expense related to the non-vested restricted share awards as of March 31, 2018 , is $4.5 million over a weighted average period of 1.68 years. During the three months ended March 31, 2018 and 2017 , the Company recorded $1.4 million and $1.6 million , respectively, of stock-based compensation related to the above plans.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The following tables present the assets reported on the consolidated balance sheets at their estimated fair value as of March 31, 2018 , and December 31, 2017 , by level within the fair value hierarchy as required by the Fair Value Measurements and Disclosures Topic of the Financial Accounting Standards Board ( “ FASB ” ) Accounting Standards Codification ( “ ASC ” ). 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 methods of determining the fair value of assets and liabilities presented in this note are consistent with our methodologies disclosed in Note 14 to the Consolidated Financial Statements of the Company’s 2017 Annual Report on Form 10-K, except for the valuation of loans held for investment which was impacted by the adoption of ASU No. 2016-01. In accordance with ASU No. 2016-01, the fair value of loans held for investment is estimated using an “exit price” approach in estimating and disclosing fair value of financial instruments incorporating discounts for credit, liquidity and marketability factors. The fair values shown as of December 31, 2017, use an “entry price” approach. For further details on ASU 2016-01 see Note 12 - “ Recently Issued and Adopted Accounting Pronouncements. ” Fair Value Measurements at March 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 GSE $ 475,198 $ — $ 475,198 $ — Non-GSE 77 — 77 — Other debt securities Municipal bonds 331 — 331 — Corporate bonds 116,968 — 116,968 — Total debt securities available-for-sale 592,574 — 592,574 — Trading securities 9,822 9,822 — — Equity securities 172 172 — — Total $ 602,568 $ 9,994 $ 592,574 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 6,040 $ — $ — $ 6,040 One-to-four family residential mortgage 1,182 — — 1,182 Multifamily 48 — — 48 Home equity and lines of credit 25 — — 25 Total impaired real estate loans 7,295 — — 7,295 Commercial and industrial loans 20 — — 20 Other real estate owned 850 — — 850 Total $ 8,165 $ — $ — $ 8,165 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: Debt securities available-for-sale: Mortgage-backed securities GSE $ 445,224 $ — $ 445,224 $ — Non-GSE 79 — 79 — Other debt securities Municipal bonds 349 — 349 — Corporate bonds 68,130 — 68,130 — Total debt securities available-for-sale 513,782 — 513,782 — Trading securities 9,597 9,597 — — Equity securities 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 March 31, 2018 , and December 31, 2017 (dollars in thousands): Fair Value Valuation Methodology Unobservable Inputs Range of Inputs March 31, 2018 December 31, 2017 March 31, 2018 December 31, 2017 Impaired loans $ 7,315 $ 6,483 Appraisals Discount for costs to sell 7.0% 7.0% Discount for quick sale 10.0% 10.0% Discounted cash flows Interest rates 3.13% to 6.5% 3.13% to 6.5% Other real estate owned $ 850 $ 850 Appraisals Discount for costs to sell 7.0% 7.0% The valuation techniques described below were used to measure fair value of financial instruments in the tables below on a recurring basis and a non-recurring basis as of March 31, 2018, and December 31, 2017. Debt Securities Available for Sale: The estimated fair values for mortgage-backed securities, corporate, and other debt securities are obtained from an independent 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 three months ended March 31, 2018 . 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 March 31, 2018 , and December 31, 2017 , the Company had impaired loans held-for-investment (excluding PCI loans) with outstanding principal balances of $9.7 million and $8.8 million , respectively, which were recorded at their estimated fair value of $7.3 million and $6.5 million , respectively. The Company recorded a net decrease in the specific reserve for impaired loans of $27,000 and $246,000 for the three months ended March 31, 2018 , and March 31, 2017 , respectively, utilizing level 3 inputs. For purposes of estimating the 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 (OREO): At both March 31, 2018 , and December 31, 2017, the Company had assets acquired through foreclosure, or deed in lieu of foreclosure, of $850,000 . These assets are recorded at estimated fair value, less estimated selling costs when acquired, 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 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 ASC 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 and 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. Certificates of deposit having original terms of six-months or less; the carrying value generally approximates fair value. Certificates of deposit with an original maturity of six months or greater; the fair value is derived from discounted cash flows. (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 analysis. 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 Federal Home Loan Bank of New York (FHLB) 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 nonperforming categories. The fair value of loans is estimated using a discounted cash flow analysis. The discount rates used to determine fair value use interest rate spreads that reflect factors such as liquidity, credit, and nonperformance risk of the loans. (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 is 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) Borrowed Funds The fair value of borrowed funds 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 value of the Company’s financial instruments at March 31, 2018 , and December 31, 2017 , is presented in the following tables (in thousands): March 31, 2018 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 52,574 $ 52,574 $ — $ — $ 52,574 Trading securities 9,822 9,822 — — 9,822 Debt securities available-for-sale 592,574 — 592,574 — 592,574 Debt securities held-to-maturity 9,873 — 9,636 — 9,636 Equity securities (1) 172 172 — 172 Federal Home Loan Bank of New York stock, at cost 24,433 — 24,433 — 24,433 Net loans held-for-investment 3,120,362 — — 3,170,626 3,170,626 Financial liabilities: Deposits $ 2,905,076 $ — $ — $ 2,906,045 $ 2,906,045 Borrowed funds 456,272 — 488,615 — 488,615 Advance payments by borrowers for taxes and insurance 18,206 — 18,206 — 18,206 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 515,121 — 515,121 — 515,121 Debt securities held-to-maturity 9,931 — 9,892 — 9,892 Equity securities (1) 323 323 — 323 Federal Home Loan Bank 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 Borrowed funds 471,549 — 466,625 — 466,625 Advance payments by borrowers for taxes and insurance 14,798 — 14,798 — 14,798 (1) Excludes $1.0 million of investments measured at net asset value at March 31, 2018, and December 31, 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 losses, 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 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	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share is computed by dividing net income available to common stockholders by the weighted average number of shares outstanding during the period. For purposes of calculating basic earnings per share, weighted average common shares outstanding excludes unallocated employee stock ownership plan (“ESOP”) shares that have not been committed for release and unvested restricted stock. Diluted earnings per share 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 would then be included in the weighted average number of shares outstanding for the period using the treasury stock method. When applying the treasury stock method 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. 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 (dollars in thousands, except per share data): Three Months Ended March 31, 2018 2017 Net income available to common stockholders $ 10,445 $ 9,948 Weighted average shares outstanding-basic 45,780,027 45,022,365 Effect of non-vested restricted stock and stock options outstanding 1,219,748 1,903,709 Weighted average shares outstanding-diluted 46,999,775 46,926,074 Earnings per share-basic $ 0.23 $ 0.22 Earnings per share-diluted $ 0.22 $ 0.21 Anti-dilutive shares 885,744 40,000

Commitments

Commitments	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments	Commitments The Company has obligations related to non-cancelable operating leases and capitalized leases on property used for banking purposes, that were disclosed in its Annual Report on Form 10-K for the year ended December 31, 2017. During the quarter ended March 31, 2018, the Company entered into a new lease agreement for 1,800 square feet of space at a branch facility in Brooklyn, New York, for a minimum term of 15 years through March 31, 2033 , with three five -year options to renew. Pursuant to the terms of this lease we estimate our total additional future minimum rent payments to be approximately $5.8 million .

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition Effective January 1, 2018, the Company adopted ASU No. 2014-09, Revenue from Contracts with Customers ( “ Topic 606 ”) and all subsequent ASUs that modified Topic 606. For further details on ASU No. 2014-09 see Note 12 - “ Recently Issued and Adopted Accounting Pronouncements. ” The adoption of ASU No. 2014-09 did not have a material 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 transactions, and other non-interest income are not in the scope of the new 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): Three Months Ended March 31, 2018 2017 Fees and service charges for customer services: Service charges $ 841 872 ATM and card interchange fees 267 260 Investment fees 106 86 Total fees and service charges for customer services 1,214 1,218 Income on bank owned life insurance 954 2,458 Gains on securities transactions, net 161 408 Other 76 63 Total non-interest income $ 2,405 $ 4,147 The following revenue streams are within the scope of Topic 606: Fees and service charges for customer services. 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 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.

Recently Issued and Adopted Acc

Recently Issued and Adopted Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently Issued and Adopted Accounting Pronouncements	Recently Issued and Adopted Accounting Pronouncements 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 new guidance. Management conducted an assessment of the revenue streams that were potentially affected by the new guidance and reviewed contracts in scope to ensure compliance with the new 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 11. “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 4 - “Equity Securities” and Note 8 - “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. Accounting Pronouncements Not Yet Adopted 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. Adoption is not expected to have a material impact on the Company's consolidated financial statements. 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 new guidance to determine what modifications may be required. As part of the evaluation process, the Company has also established a CECL working group that includes individuals from various functional areas to assess processes and is also evaluating third-party vendor solutions to assist in the application of the ASU No. 2016-13. 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 guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that reporting period. The Company is currently evaluating the potential effect of adoption of this pronouncement on its consolidated financial statements. The Company has several lease agreements, such as branch locations, which are currently considered operating leases, and therefore, not recognized on the Company’s consolidated statements of condition. The new guidance will require these lease agreements to be recognized on the consolidated balance sheets as a right-of-use asset and a corresponding lease liability. Therefore, the Company’s preliminary evaluation indicates the provisions of ASU No. 2016-02 are expected to impact the Company’s consolidated balance sheets; the extent of such impact is under evaluation. The Company does not expect the new guidance to have a material impact on its results of operations. The Company is nearing completion of identifying a complete inventory of arrangements containing a lease and accumulating the lease data necessary to apply the amended guidance. In addition, the Company has contracted with a third-party software vendor to aid in the transition to the new leasing guidance.

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reclassification	Whenever necessary, certain prior year amounts are reclassified to conform to the current year presentation.
Basis of Accounting	In preparing the unaudited consolidated financial statements in conformity with U.S. generally accepted accounting principles (U.S. GAAP), management has made estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated statements of financial condition and results of operations for the periods indicated.
Use of Estimates	Material estimates that are particularly susceptible to change are: the allowance for loan losses, the evaluation of goodwill and other intangible assets, impairment on investment securities, fair value measurements of assets and liabilities, and income taxes. Estimates and assumptions are reviewed periodically and the effects of revisions are reflected in the consolidated financial statements in the period they are deemed necessary. While management uses its best judgment, actual amounts or results could differ significantly from those estimates.
Fair Value Measurements	Fair Value Measurements The following tables present the assets reported on the consolidated balance sheets at their estimated fair value as of March 31, 2018 , and December 31, 2017 , by level within the fair value hierarchy as required by the Fair Value Measurements and Disclosures Topic of the Financial Accounting Standards Board ( “ FASB ” ) Accounting Standards Codification ( “ ASC ” ). 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 ASC 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 and 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. Certificates of deposit having original terms of six-months or less; the carrying value generally approximates fair value. Certificates of deposit with an original maturity of six months or greater; the fair value is derived from discounted cash flows. (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 analysis. 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 Federal Home Loan Bank of New York (FHLB) 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 nonperforming categories. The fair value of loans is estimated using a discounted cash flow analysis. The discount rates used to determine fair value use interest rate spreads that reflect factors such as liquidity, credit, and nonperformance risk of the loans. (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 is 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) Borrowed Funds The fair value of borrowed funds 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.
Earnings Per Share	Basic earnings per share is computed by dividing net income available to common stockholders by the weighted average number of shares outstanding during the period. For purposes of calculating basic earnings per share, weighted average common shares outstanding excludes unallocated employee stock ownership plan (“ESOP”) shares that have not been committed for release and unvested restricted stock. Diluted earnings per share 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 would then be included in the weighted average number of shares outstanding for the period using the treasury stock method. When applying the treasury stock method 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.
Recently Issued and Adopted Accounting Pronouncements	Recently Issued and Adopted Accounting Pronouncements 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 new guidance. Management conducted an assessment of the revenue streams that were potentially affected by the new guidance and reviewed contracts in scope to ensure compliance with the new 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 11. “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 4 - “Equity Securities” and Note 8 - “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. Accounting Pronouncements Not Yet Adopted 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. Adoption is not expected to have a material impact on the Company's consolidated financial statements. 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 new guidance to determine what modifications may be required. As part of the evaluation process, the Company has also established a CECL working group that includes individuals from various functional areas to assess processes and is also evaluating third-party vendor solutions to assist in the application of the ASU No. 2016-13. 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 guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that reporting period. The Company is currently evaluating the potential effect of adoption of this pronouncement on its consolidated financial statements. The Company has several lease agreements, such as branch locations, which are currently considered operating leases, and therefore, not recognized on the Company’s consolidated statements of condition. The new guidance will require these lease agreements to be recognized on the consolidated balance sheets as a right-of-use asset and a corresponding lease liability. Therefore, the Company’s preliminary evaluation indicates the provisions of ASU No. 2016-02 are expected to impact the Company’s consolidated balance sheets; the extent of such impact is under evaluation. The Company does not expect the new guidance to have a material impact on its results of operations. The Company is nearing completion of identifying a complete inventory of arrangements containing a lease and accumulating the lease data necessary to apply the amended guidance. In addition, the Company has contracted with a third-party software vendor to aid in the transition to the new leasing guidance.

Debt Securities Available-for21

Debt Securities Available-for-Sale (Tables)	3 Months Ended
	Mar. 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 and other debt securities available-for-sale at March 31, 2018 , and December 31, 2017 (in thousands): March 31, 2018 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises (GSE) $ 215,952 $ 670 $ 4,396 $ 212,226 Real estate mortgage investment conduits (REMICs): GSE 272,524 68 9,620 262,972 Non-GSE 78 — 1 77 488,554 738 14,017 475,275 Other debt securities: Municipal bonds 326 5 — 331 Corporate bonds 117,291 461 784 116,968 117,617 466 784 117,299 Total debt securities available-for-sale $ 606,171 $ 1,204 $ 14,801 $ 592,574 December 31, 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 March 31, 2018 (in thousands): Available-for-sale Amortized cost Estimated fair value Due after one year through five years $ 107,732 $ 107,425 Due after five years through ten years 9,885 9,874 $ 117,617 $ 117,299
Gross Unrealized Losses on Mortgage-Backed Securities	Gross unrealized losses on mortgage-backed 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 March 31, 2018 , and December 31, 2017 , were as follows (in thousands): March 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 $ 1,098 $ 83,938 $ 3,298 $ 79,205 $ 4,396 $ 163,143 REMICs: GSE 2,257 123,851 7,363 122,544 9,620 246,395 Non-GSE — — 1 77 1 77 Other debt securities: Corporate bonds 383 40,441 401 14,800 784 55,241 Total $ 3,738 $ 248,230 $ 11,063 $ 216,626 $ 14,801 $ 464,856 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-Matur22

Debt Securities Held-to-Maturity (Tables)	3 Months Ended
	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Securities Held-to-Maturity	The following is a summary of debt securities held-to-maturity at March 31, 2018 , and December 31, 2017 (in thousands): March 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 9,873 $ — $ 237 $ 9,636 Total securities held-to-maturity $ 9,873 $ — $ 237 $ 9,636 December 31, 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 March 31, 2018 and December 31, 2017 , were as follows (in thousands): March 31, 2018 Less than 12 months 12 months or more Total Unrealized losses Estimated fair value Unrealized losses Estimated fair value Unrealized losses Estimated fair value Mortgage-backed securities: Pass-through certificates: GSEs $ 113 $ 5,998 $ 124 $ 3,638 $ 237 $ 9,636 Total securities held-to-maturity $ 113 $ 5,998 $ 124 $ 3,638 $ 237 $ 9,636 December 31, 2017 Less than 12 months 12 months or more Total Unrealized losses Estimated fair value Unrealized losses Estimated fair value Unrealized losses Estimated fair value Mortgage-backed securities: Pass-through certificates: GSEs $ 7 $ 3,922 $ 49 $ 3,735 $ 56 $ 7,657 Total securities held-to-maturity $ 7 $ 3,922 $ 49 $ 3,735 $ 56 $ 7,657

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Net Loans Held-for-Investment	Net loans held-for-investment are as follows (in thousands): March 31, December 31, 2018 2017 Real estate loans: Multifamily $ 1,740,244 $ 1,735,712 Commercial mortgage 446,276 445,225 One-to-four family residential mortgage 98,907 100,942 Home equity and lines of credit 67,623 66,254 Construction and land 28,894 34,545 Total real estate loans 2,381,944 2,382,678 Commercial and industrial loans 37,388 34,828 Other loans 1,673 1,430 Total commercial and industrial and other loans 39,061 36,258 Deferred loan cost, net 6,750 6,339 Originated loans held-for-investment, net 2,427,755 2,425,275 PCI Loans 22,084 22,741 Loans acquired: One-to-four family residential mortgage 289,071 275,053 Multifamily 197,712 199,149 Commercial mortgage 159,853 163,962 Home equity and lines of credit 19,449 20,455 Construction and land 14,928 17,201 Total acquired real estate loans 681,013 675,820 Commercial and industrial loans 15,659 16,946 Other loans 23 37 Total loans acquired, net 696,695 692,803 Loans held-for-investment, net 3,146,534 3,140,819 Allowance for loan losses (26,172 ) (26,160 ) Net loans held-for-investment $ 3,120,362 $ 3,114,659
Summary of Accretable Yield	The following table details the accretion of interest income for PCI loans for the three months ended March 31, 2018 and March 31, 2017 (in thousands): At or for the three months ended March 31, 2018 2017 Balance at the beginning of period $ 24,502 $ 24,215 Accretion into interest income (1,090 ) (1,452 ) Balance at end of period $ 23,412 $ 22,763
Allowance For Loan Losses And Loans Receivable By Portfolio Segment Table	The following tables set forth activity in our allowance for loan losses, by loan type, as of and for the three months ended March 31, 2018 , and March 31, 2017 (in thousands): Three Months Ended March 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 Purchased Credit-Impaired 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 (3 ) — — — (60 ) — — — (63 ) — (1 ) (64 ) Recoveries 16 — — — — 20 — — 36 — 6 42 Provisions (credit) 4 (48 ) (147 ) 38 163 44 19 — 73 — (39 ) 34 Ending balance $ 5,213 $ 455 $ 463 $ 17,412 $ 225 $ 1,337 $ 113 $ — $ 25,218 $ 951 $ 3 $ 26,172 Three Months Ended March 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 Purchased Credit-Impaired 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 ) — — — — — — — (4 ) — (23 ) (27 ) Recoveries 17 — — 278 — 47 — — 342 — 2 344 Provisions (credit) (214 ) (15 ) (7 ) 954 (96 ) (206 ) (24 ) — 392 — (20 ) 372 Ending balance $ 5,231 $ 649 $ 165 $ 16,184 $ 492 $ 1,561 $ 72 $ — $ 24,354 $ 896 $ 34 $ 25,284 The following tables detail 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 the allowance for loan losses that is allocated to each loan portfolio segment, at March 31, 2018 , and December 31, 2017 (in thousands): March 31, 2018 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Originated Loans Total Purchased Credit-Impaired Acquired Loans Total Allowance for loan losses: Ending balance: individually evaluated for impairment $ 4 $ 35 $ — $ — $ 10 $ 3 $ — $ 52 $ — $ 3 $ 55 Ending balance: collectively evaluated for impairment $ 5,209 $ 420 $ 463 $ 17,412 $ 215 $ 1,334 $ 113 $ 25,166 $ 951 $ — $ 26,117 Loans, net: Ending balance $ 446,879 $ 99,991 $ 28,965 $ 1,743,665 $ 69,112 $ 37,470 $ 1,673 $ 2,427,755 $ 22,084 $ 696,695 $ 3,146,534 Ending balance: individually evaluated for impairment $ 15,873 $ 1,977 $ — $ 1,292 $ 67 $ 155 $ — $ 19,364 $ — $ 1,225 $ 20,589 Ending balance: collectively evaluated for impairment $ 431,006 $ 98,014 $ 28,965 $ 1,742,373 $ 69,045 $ 37,315 $ 1,673 $ 2,408,391 $ 22,084 $ 695,470 $ 3,125,945 December 31, 2017 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Originated Loans Total Purchased Credit-Impaired Acquired Loans Total Allowance for loan losses: 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 tables detail the recorded investment of originated loans held-for-investment, net of deferred fees and costs, by loan type and credit quality indicator at March 31, 2018 , and December 31, 2017 (in thousands): March 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 $ 133,669 $ 1,606,547 $ 57,900 $ 374,775 $ 60,442 $ 36,829 $ 28,965 $ 68,862 $ 36,756 $ 1,673 $ 2,406,418 Special Mention — 633 406 1,168 678 — — 28 536 — 3,449 Substandard — 2,816 — 12,630 1,456 586 — 222 178 — 17,888 Originated loans held-for-investment, net $ 133,669 $ 1,609,996 $ 58,306 $ 388,573 $ 62,576 $ 37,415 $ 28,965 $ 69,112 $ 37,470 $ 1,673 $ 2,427,755 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 tables set forth the detail, and delinquency status, of non-performing loans (non-accrual loans and loans past due 90 days or more and still accruing), net of deferred fees and costs, at March 31, 2018 , and December 31, 2017 , excluding loans held-for-sale and 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 (in thousands): March 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 $ — $ 725 $ 2,304 $ 3,029 $ — $ 3,029 Total commercial — 725 2,304 3,029 — 3,029 One-to-four family residential LTV < 60% Substandard — 203 328 531 — 531 Total — 203 328 531 — 531 LTV => 60% Substandard — — 38 38 — 38 Total one-to-four family residential — 203 366 569 — 569 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 79 928 2,742 3,749 — 3,749 Loans acquired: Real estate loans: Commercial LTV < 35% Substandard — — 294 294 — 294 LTV => 35% Substandard — 771 58 829 — 829 Total commercial — 771 352 1,123 — 1,123 One-to-four family residential LTV < 60% Substandard 1 200 27 228 58 286 Total one-to-four family residential 1 200 27 228 58 286 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 Total non-performing loans acquired 1 1,416 428 1,845 58 1,903 Total non-performing loans $ 80 $ 2,344 $ 3,170 $ 5,594 $ 58 $ 5,652 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 loans Substandard — — 2 2 — 2 Total commercial and industrial loans — — 2 2 — 2 Other loans - Pass — — — — 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 tables set forth the detail and delinquency status of originated and acquired loans held-for-investment, net of deferred fees and costs, by performing and non-performing loans at March 31, 2018 , and December 31, 2017 (in thousands): March 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 $ 57,674 $ 226 $ 57,900 $ — $ 57,900 Special Mention — 406 406 — 406 Total 57,674 632 58,306 — 58,306 LTV => 35% Pass 374,775 — 374,775 — 374,775 Special Mention 824 344 1,168 — 1,168 Substandard 7,632 1,969 9,601 3,029 12,630 Total 383,231 2,313 385,544 3,029 388,573 Total commercial 440,905 2,945 443,850 3,029 446,879 One-to-four family residential LTV < 60% Pass 58,022 2,420 60,442 — 60,442 Special Mention — 678 678 — 678 Substandard 925 — 925 531 1,456 Total 58,947 3,098 62,045 531 62,576 LTV => 60% Pass 36,829 — 36,829 — 36,829 Substandard 548 — 548 38 586 Total 37,377 — 37,377 38 37,415 Total one-to-four family residential 96,324 3,098 99,422 569 99,991 Construction and land Pass 28,965 — 28,965 — 28,965 Total construction and land 28,965 — 28,965 — 28,965 Multifamily LTV < 35% Pass 133,669 — 133,669 — 133,669 Total 133,669 — 133,669 — 133,669 LTV => 35% Pass 1,605,986 561 1,606,547 — 1,606,547 Special Mention 633 — 633 — 633 Substandard 1,572 1,244 2,816 — 2,816 Total 1,608,191 1,805 1,609,996 — 1,609,996 Total multifamily 1,741,860 1,805 1,743,665 — 1,743,665 Home equity and lines of credit Pass 68,396 466 68,862 — 68,862 Special Mention 28 — 28 — 28 Substandard 143 — 143 79 222 Total home equity and lines of credit 68,567 466 69,033 79 69,112 Commercial and industrial Pass 36,664 92 36,756 — 36,756 Special Mention 536 — 536 — 536 Substandard 106 — 106 72 178 Total commercial and industrial 37,306 92 37,398 72 37,470 March 31, 2018 Performing (Accruing) Loans (Continued) 0-29 Days Past Due 30-89 Days Past Due Total Non-Performing Loans Total Loans Receivable, net Other loans - Pass 1,644 29 1,673 — 1,673 Total originated loans held-for-investment 2,415,571 8,435 2,424,006 3,749 2,427,755 Acquired loans: One-to-four family residential LTV < 60% Pass 261,242 1,820 263,062 — 263,062 Special Mention 435 — 435 — 435 Substandard 65 129 194 286 480 Total 261,742 1,949 263,691 286 263,977 LTV => 60% Pass 24,867 94 24,961 — 24,961 Substandard 133 — 133 — 133 Total 25,000 94 25,094 — 25,094 Total one-to-four family residential 286,742 2,043 288,785 286 289,071 Commercial LTV < 35% Pass 49,236 70 49,306 — 49,306 Special Mention 90 — 90 — 90 Substandard 84 — 84 294 378 Total 49,410 70 49,480 294 49,774 LTV => 35% Pass 104,388 635 105,023 — 105,023 Special Mention — 132 132 — 132 Substandard 3,670 425 4,095 829 4,924 Total 108,058 1,192 109,250 829 110,079 Total commercial 157,468 1,262 158,730 1,123 159,853 Construction and land Pass 14,336 592 14,928 — 14,928 Total construction and land 14,336 592 14,928 — 14,928 Multifamily LTV < 35% Pass 188,186 — 188,186 — 188,186 Special Mention 71 — 71 — 71 Substandard — 152 152 — 152 Total 188,257 152 188,409 — 188,409 LTV => 35% Pass 8,886 — 8,886 — 8,886 Substandard — — — 417 417 Total 8,886 — 8,886 417 9,303 Total multifamily 197,143 152 197,295 417 197,712 Home equity and lines of credit Pass 19,207 80 19,287 — 19,287 Substandard 85 — 85 77 162 Total home equity and lines of credit 19,292 80 19,372 77 19,449 Commercial and industrial Pass 15,659 — 15,659 — 15,659 Total commercial and industrial 15,659 — 15,659 — 15,659 Other loans - Pass 23 — 23 — 23 Total loans acquired 690,663 4,129 694,792 1,903 696,695 $ 3,106,234 $ 12,564 $ 3,118,798 $ 5,652 $ 3,124,450 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 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 Real estate loans: 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 Pass 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 Substandard — — — 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 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	Three Months Ended March 31, 2018 March 31, 2017 Average Recorded Investment Interest Income Average Recorded Investment Interest Income With No Allowance Recorded: Real estate loans: Commercial LTV < 35% Substandard $ — $ — $ — $ 5 LTV => 35% Pass 5,479 64 4,890 64 Substandard 9,718 75 13,699 128 One-to-four family residential LTV < 60% Pass 1,183 13 630 8 Substandard 252 1 386 8 LTV => 60% Pass 269 4 — — Substandard 134 3 450 5 Multifamily LTV < 35% Substandard 152 1 155 1 LTV => 35% Pass 679 4 61 4 Substandard 622 11 — — Home equity and lines of credit Pass 33 1 38 1 Commercial and industrial loans Substandard 134 — 110 — With a Related Allowance Recorded: Real estate loans: Commercial Pass 743 20 — — Substandard — — 1,010 — One-to-four family residential LTV < 60% Pass 409 2 — — Substandard 837 4 1,308 7 LTV => 60% Pass 134 — 274 4 Substandard — — 379 1 Multifamily LTV => 35% Pass — — 1,302 12 Substandard — — 450 — Three Months Ended March 31, 2018 March 31, 2017 Average Recorded Investment Interest Income Average Recorded Investment Interest Income Home equity and lines of credit Pass — — 257 2 Substandard 35 — 38 — Commercial and industrial loans Special Mention 24 — 26 — Total: Real estate loans Commercial 15,940 159 19,599 197 One-to-four family residential 3,218 27 3,427 33 Multifamily 1,453 16 1,968 17 Home equity and lines of credit 68 1 333 3 Commercial and industrial loans 158 — 136 — $ 20,837 $ 203 $ 25,463 $ 250 The following table summarizes originated and acquired impaired loans as of March 31, 2018 , and December 31, 2017 (in thousands): March 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 4,695 5,581 — 6,263 7,150 — Substandard 9,692 10,508 — 9,745 10,560 — One-to-four family residential LTV < 60% Pass 1,177 1,245 — 1,189 1,254 — Substandard 252 252 — 251 251 — LTV => 60% Pass 402 427 — 136 161 — Substandard 133 285 — 135 286 — Multifamily LTV < 35% Substandard 152 152 — 153 153 — LTV => 35% Pass 48 518 — 1,309 1,780 Substandard 1,244 1,244 — — — — Home equity and lines of credit Pass 32 32 — 33 33 — Commercial and industrial loans Substandard 132 132 — 135 135 — With a Related Allowance Recorded: Real estate loans: Commercial LTV => 35% Pass 1,486 1,486 (4 ) — — — One-to-four family residential LTV < 60% Pass 408 408 (3 ) 411 411 (7 ) Substandard 678 678 (35 ) 997 997 (49 ) LTV => 60% Pass — — — 268 268 (19 ) Home equity and lines of credit Substandard 35 35 (10 ) 36 36 (4 ) Commercial and industrial loans Special Mention 23 23 (3 ) 24 24 (3 ) Total: Real estate loans Commercial 15,873 17,714 (4 ) 16,008 17,849 — One-to-four family residential 3,050 3,295 (38 ) 3,387 3,628 (75 ) Multifamily 1,444 1,914 — 1,462 1,933 — Home equity and lines of credit 67 67 (10 ) 69 69 (4 ) Commercial and industrial loans 155 155 (3 ) 159 159 (3 ) $ 20,589 $ 23,145 $ (55 ) $ 21,085 $ 23,638 $ (82 )

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2018
Banking and Thrift [Abstract]
Deposit Account Balances	Deposits account balances are summarized as follows (in thousands): March 31, 2018 December 31, 2017 Non-interest-bearing demand $ 405,917 $ 407,267 Interest-bearing negotiable orders of withdrawal (NOW) 480,466 465,140 Savings and money market 1,190,872 1,225,643 Certificates of deposit 827,821 738,929 Total deposits $ 2,905,076 $ 2,836,979
Interest Expense on Deposits	Interest expense on deposit accounts is summarized for the periods indicated (in thousands): Three Months Ended March 31, 2018 2017 Negotiable orders of withdrawal, savings, and money market $ 2,143 $ 2,030 Certificates of deposit 3,068 1,590 Total interest expense on deposit accounts $ 5,211 $ 3,620

Equity Incentive Plan (Tables)

Equity Incentive Plan (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Options Outstanding	The following table is a summary of the Company’s stock options outstanding as of March 31, 2018 , and changes therein during the three months then ended. Number of Stock Options Weighted Average Grant Date Fair Value Weighted Average Exercise Price Weighted Average Contractual Life (years) Outstanding - December 31, 2017 4,620,687 $ 3.51 $ 11.82 5.17 Forfeited (14,318 ) 2.65 8.51 — Exercised (530,180 ) 2.56 7.91 — Outstanding - March 31, 2018 4,076,189 3.63 12.34 5.37 Exercisable - March 31, 2018 2,577,157 3.40 11.35 4.53
Status of the Company's Restricted Share Awards	The following is a summary of the status of the Company’s restricted stock awards as of March 31, 2018 , and changes therein during the three months then ended. Number of Shares Awarded Weighted Average Grant Date Fair Value Non-vested at December 31, 2017 585,895 $ 14.05 Forfeited (600 ) 13.13 Non-vested at March 31, 2018 585,295 $ 14.05

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Significant Fair Value of Assets and Liabilities Measured on Recurring and Non Recurring Basis	The fair values shown as of December 31, 2017, use an “entry price” approach. For further details on ASU 2016-01 see Note 12 - “ Recently Issued and Adopted Accounting Pronouncements. ” Fair Value Measurements at March 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 GSE $ 475,198 $ — $ 475,198 $ — Non-GSE 77 — 77 — Other debt securities Municipal bonds 331 — 331 — Corporate bonds 116,968 — 116,968 — Total debt securities available-for-sale 592,574 — 592,574 — Trading securities 9,822 9,822 — — Equity securities 172 172 — — Total $ 602,568 $ 9,994 $ 592,574 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 6,040 $ — $ — $ 6,040 One-to-four family residential mortgage 1,182 — — 1,182 Multifamily 48 — — 48 Home equity and lines of credit 25 — — 25 Total impaired real estate loans 7,295 — — 7,295 Commercial and industrial loans 20 — — 20 Other real estate owned 850 — — 850 Total $ 8,165 $ — $ — $ 8,165 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: Debt securities available-for-sale: Mortgage-backed securities GSE $ 445,224 $ — $ 445,224 $ — Non-GSE 79 — 79 — Other debt securities Municipal bonds 349 — 349 — Corporate bonds 68,130 — 68,130 — Total debt securities available-for-sale 513,782 — 513,782 — Trading securities 9,597 9,597 — — Equity securities 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 March 31, 2018 , and December 31, 2017 (dollars in thousands): Fair Value Valuation Methodology Unobservable Inputs Range of Inputs March 31, 2018 December 31, 2017 March 31, 2018 December 31, 2017 Impaired loans $ 7,315 $ 6,483 Appraisals Discount for costs to sell 7.0% 7.0% Discount for quick sale 10.0% 10.0% Discounted cash flows Interest rates 3.13% to 6.5% 3.13% to 6.5% Other real estate owned $ 850 $ 850 Appraisals Discount for costs to sell 7.0% 7.0%
Estimated Fair Values of Significant Financial Instruments	The estimated fair value of the Company’s financial instruments at March 31, 2018 , and December 31, 2017 , is presented in the following tables (in thousands): March 31, 2018 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 52,574 $ 52,574 $ — $ — $ 52,574 Trading securities 9,822 9,822 — — 9,822 Debt securities available-for-sale 592,574 — 592,574 — 592,574 Debt securities held-to-maturity 9,873 — 9,636 — 9,636 Equity securities (1) 172 172 — 172 Federal Home Loan Bank of New York stock, at cost 24,433 — 24,433 — 24,433 Net loans held-for-investment 3,120,362 — — 3,170,626 3,170,626 Financial liabilities: Deposits $ 2,905,076 $ — $ — $ 2,906,045 $ 2,906,045 Borrowed funds 456,272 — 488,615 — 488,615 Advance payments by borrowers for taxes and insurance 18,206 — 18,206 — 18,206 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 515,121 — 515,121 — 515,121 Debt securities held-to-maturity 9,931 — 9,892 — 9,892 Equity securities (1) 323 323 — 323 Federal Home Loan Bank 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 Borrowed funds 471,549 — 466,625 — 466,625 Advance payments by borrowers for taxes and insurance 14,798 — 14,798 — 14,798

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 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 (dollars in thousands, except per share data): Three Months Ended March 31, 2018 2017 Net income available to common stockholders $ 10,445 $ 9,948 Weighted average shares outstanding-basic 45,780,027 45,022,365 Effect of non-vested restricted stock and stock options outstanding 1,219,748 1,903,709 Weighted average shares outstanding-diluted 46,999,775 46,926,074 Earnings per share-basic $ 0.23 $ 0.22 Earnings per share-diluted $ 0.22 $ 0.21 Anti-dilutive shares 885,744 40,000

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 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): Three Months Ended March 31, 2018 2017 Fees and service charges for customer services: Service charges $ 841 872 ATM and card interchange fees 267 260 Investment fees 106 86 Total fees and service charges for customer services 1,214 1,218 Income on bank owned life insurance 954 2,458 Gains on securities transactions, net 161 408 Other 76 63 Total non-interest income $ 2,405 $ 4,147

Debt Securities Available-for29

Debt Securities Available-for-Sale - Comparative Summary of Mortgage-Backed Securities and Other Securities Available-for-Sale) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 606,171	$ 521,171
Gross unrealized gains	1,204	2,123
Gross unrealized losses	14,801	9,512
Debt securities available-for-sale	592,574	513,782
Pass-through Certificates | GSE
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	215,952	179,320
Gross unrealized gains	670	1,429
Gross unrealized losses	4,396	2,454
Debt securities available-for-sale	212,226	178,295
Real estate mortgage investment conduits (REMICs)
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	488,554	452,901
Gross unrealized gains	738	1,716
Gross unrealized losses	14,017	9,314
Debt securities available-for-sale	475,275	445,303
Real estate mortgage investment conduits (REMICs) | GSE
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	272,524	273,501
Gross unrealized gains	68	287
Gross unrealized losses	9,620	6,859
Debt securities available-for-sale	262,972	266,929
Real estate mortgage investment conduits (REMICs) | Non-GSE
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	78	80
Gross unrealized gains	0	0
Gross unrealized losses	1	1
Debt securities available-for-sale	77	79
Debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	117,617	68,270
Gross unrealized gains	466	407
Gross unrealized losses	784	198
Debt securities available-for-sale	117,299	68,479
Debt securities | Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	326	343
Gross unrealized gains	5	6
Gross unrealized losses	0	0
Debt securities available-for-sale	331	349
Debt securities | Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	117,291	67,927
Gross unrealized gains	461	401
Gross unrealized losses	784	198
Debt securities available-for-sale	$ 116,968	$ 68,130

Debt Securities Available-for30

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	Mar. 31, 2018	Dec. 31, 2017
Amortized cost
Amortized cost	$ 606,171	$ 521,171
Estimated fair value
Estimated fair value	592,574	$ 513,782
Other Than Mortgage Backed Securities
Amortized cost
Due after one year through five years	107,732
Due after five years through ten years	9,885
Amortized cost	117,617
Estimated fair value
Due after one year through five years	107,425
Due after one year through five years	9,874
Estimated fair value	$ 117,299

Debt Securities Available-for31

Debt Securities Available-for-Sale - Narrative (Details)	3 Months Ended
	Mar. 31, 2018USD ($)security	Mar. 31, 2017USD ($)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities pledged to secure borrowings and deposits | $	$ 361,900,000
Proceeds from sale of debt securities available-for-sale | $	19,500,000	$ 0
Gross realized gains on sales of securities available-for-sale | $	60,000
Gross realized losses on sales of securities available-for-sale | $	5,000
Recognized gains (losses) on trading securities portfolio | $	106,000	408,000
Impairment charges against earnings | $	$ 0	$ 0
Continuous Unrealized Loss Position 12 Months Or Longer | Non-GSE | Real Estate Mortgage Investment Conduits (REMICs)
Schedule of Available-for-sale Securities [Line Items]
Number of securities (securities) | security	1
Continuous Unrealized Loss Position Less Than 12 Months | Corporate bonds | Real Estate Mortgage Investment Conduits (REMICs)
Schedule of Available-for-sale Securities [Line Items]
Number of securities (securities) | security	8
Pass Through | Continuous Unrealized Loss Position 12 Months Or Longer | GSE | Real Estate Mortgage Investment Conduits (REMICs)
Schedule of Available-for-sale Securities [Line Items]
Number of securities (securities) | security	33
Pass Through | Continuous Unrealized Loss Position Less Than 12 Months | GSE | Pass-through Certificates
Schedule of Available-for-sale Securities [Line Items]
Number of securities (securities) | security	36
Non Pass Through | Continuous Unrealized Loss Position 12 Months Or Longer | GSE | Real Estate Mortgage Investment Conduits (REMICs)
Schedule of Available-for-sale Securities [Line Items]
Number of securities (securities) | security	16
Non Pass Through | Continuous Unrealized Loss Position Less Than 12 Months | GSE | Real Estate Mortgage Investment Conduits (REMICs)
Schedule of Available-for-sale Securities [Line Items]
Number of securities (securities) | security	38

Debt Securities Available-for32

Debt Securities Available-for-Sale - Gross Unrealized Losses on Mortgage-Backed Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, less than 12 months	$ 3,738	$ 1,433
Estimated Fair value, less than 12 months	248,230	163,581
Unrealized losses, 12 months or more	11,063	8,079
Estimated Fair value, 12 months or more	216,626	231,106
Unrealized losses, total	14,801	9,512
Estimated fair value, total	464,856	394,687
Pass-through Certificates | GSE
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, less than 12 months	1,098	439
Estimated Fair value, less than 12 months	83,938	48,931
Unrealized losses, 12 months or more	3,298	2,015
Estimated Fair value, 12 months or more	79,205	76,113
Unrealized losses, total	4,396	2,454
Estimated fair value, total	163,143	125,044
Real estate mortgage investment conduits (REMICs) | GSE
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, less than 12 months	2,257	933
Estimated Fair value, less than 12 months	123,851	103,644
Unrealized losses, 12 months or more	7,363	5,926
Estimated Fair value, 12 months or more	122,544	139,830
Unrealized losses, total	9,620	6,859
Estimated fair value, total	246,395	243,474
Real estate mortgage investment conduits (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	77	79
Unrealized losses, total	1	1
Estimated fair value, total	77	79
Debt securities | Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses, less than 12 months	383	61
Estimated Fair value, less than 12 months	40,441	11,006
Unrealized losses, 12 months or more	401	137
Estimated Fair value, 12 months or more	14,800	15,084
Unrealized losses, total	784	198
Estimated fair value, total	$ 55,241	$ 26,090

Equity Securities (Details)

Equity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Equity securities	$ 1,194	$ 1,339

Debt Securities Held-to-Matur34

Debt Securities Held-to-Maturity - Mortgage Backed Securities Held-to-Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 9,873	$ 9,931
Gross Unrealized Gains	0	17
Gross Unrealized Losses	237	56
Estimated Fair Value	9,636	9,892
Mortgage Backed Securities Pass Through Certificates
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	9,873	9,931
Gross Unrealized Gains	0	17
Gross Unrealized Losses	237	56
Estimated Fair Value	$ 9,636	$ 9,892

Debt Securities Held-to-Matur35

Debt Securities Held-to-Maturity - Held-to-Maturity Securities in a Continuous Unrealized Loss Positions (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2018USD ($)loan	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities sold	$ 0	$ 0
Other-than-temporary impairment charge recognized in earnings	0	$ 0
Held-to-maturity securities pledged to secure borrowings and deposits	9,900,000
Unrealized losses
Less than 12 months	113,000		$ 7,000
12 months or more	124,000		49,000
Total	237,000		56,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	5,998,000		3,922,000
12 months or more	3,638,000		3,735,000
Total	9,636,000		7,657,000
Mortgage Backed Securities Pass Through Certificates
Unrealized losses
Less than 12 months	113,000		7,000
12 months or more	124,000		49,000
Total	237,000		56,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	5,998,000		3,922,000
12 months or more	3,638,000		3,735,000
Total	$ 9,636,000		$ 7,657,000
Number of mortgage-backed securities in unrealized loss position, greater than 12 months (loan) | loan	2
Number of mortgage-backed securities in unrealized loss position, less than 12 months (loan) | loan	4

Loans - Net Loans Held-for-Inve

Loans - Net Loans Held-for-Investment (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Investments In Loans [Line Items]
Commercial and industrial loans	$ 37,388	$ 34,828
Other loans	1,673	1,430
Total commercial and industrial and other loans	39,061	36,258
Deferred loan cost, net	6,750	6,339
Originated loans held-for-investment, net	2,427,755	2,425,275
PCI Loans	22,084	22,741
Loans acquired	696,695	692,803
Loans held-for-investment, net	3,146,534	3,140,819
Allowance for loan losses	(26,172)	(26,160)	$ (25,284)	$ (24,595)
Net loans held-for-investment	3,120,362	3,114,659
Real Estate Loans
Investments In Loans [Line Items]
Total real estate loans	2,381,944	2,382,678
Real Estate Loans | Multifamily
Investments In Loans [Line Items]
Total real estate loans	1,740,244	1,735,712
Loans held-for-investment, net	1,743,665	1,739,220
Allowance for loan losses	(17,412)	(17,374)	(16,184)	(14,952)
Real Estate Loans | Commercial mortgage
Investments In Loans [Line Items]
Total real estate loans	446,276	445,225
Loans held-for-investment, net	446,879	445,781
Allowance for loan losses	(5,213)	(5,196)	(5,231)	(5,432)
Real Estate Loans | One-to-four family residential mortgage
Investments In Loans [Line Items]
Total real estate loans	98,907	100,942
Loans held-for-investment, net	99,991	101,650
Allowance for loan losses	(455)	(503)	(649)	(664)
Real Estate Loans | Home equity and lines of credit
Investments In Loans [Line Items]
Total real estate loans	67,623	66,254
Loans held-for-investment, net	69,112	67,679
Allowance for loan losses	(225)	(122)	(492)	(588)
Real Estate Loans | Construction and land
Investments In Loans [Line Items]
Total real estate loans	28,894	34,545
Loans held-for-investment, net	28,965	34,620
Allowance for loan losses	(463)	(610)	$ (165)	$ (172)
Real Estate Loans Acquired
Investments In Loans [Line Items]
Loans acquired	681,013	675,820
Real Estate Loans Acquired | Multifamily
Investments In Loans [Line Items]
Loans acquired	197,712	199,149
Real Estate Loans Acquired | Commercial mortgage
Investments In Loans [Line Items]
Loans acquired	159,853	163,962
Real Estate Loans Acquired | One-to-four family residential mortgage
Investments In Loans [Line Items]
Loans acquired	289,071	275,053
Real Estate Loans Acquired | Home equity and lines of credit
Investments In Loans [Line Items]
Loans acquired	19,449	20,455
Real Estate Loans Acquired | Construction and land
Investments In Loans [Line Items]
Loans acquired	14,928	17,201
Loans acquired
Investments In Loans [Line Items]
Commercial and industrial loans	15,659	16,946
Other loans	23	37
Loans acquired	$ 696,695	$ 692,803

Loans - Narrative, PCI Loans (D

Loans - Narrative, PCI Loans (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale		$ 0
Purchased credit-impaired (“PCI”) loans held-for-investment	$ 22,084,000	$ 22,741,000
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of PCI loans	27.00%	27.00%
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of PCI loans	50.00%	50.00%

Loans - Summary of Accretable Y

Loans - Summary of Accretable Yield (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accretable Yield Movement Schedule [Roll Forward]
Balance at the beginning of period	$ 24,502	$ 24,215
Accretion into interest income	(1,090)	(1,452)
Balance at end of period	$ 23,412	$ 22,763

Loans - Amount of Loans Receiva

Loans - Amount of Loans Receivable Held-for-Investment and Related Allowances Per Loan Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Allowance for loan losses:
Beginning Balance	$ 26,160	$ 24,595
Charge-offs	(64)	(27)
Recoveries	42	344
Provisions (credit)	34	372
Ending Balance	26,160	24,595	$ 26,172	$ 26,160	$ 25,284
Ending balance: individually evaluated for impairment			55	82
Ending balance: collectively evaluated for impairment			26,117	26,078
Loans, net:
Loans held-for-investment, net			3,146,534	3,140,819
Ending balance: individually evaluated for impairment			20,589	21,085
Ending balance: collectively evaluated for impairment			3,125,945	3,119,734
Commercial and Industrial
Allowance for loan losses:
Beginning Balance	1,273	1,720
Charge-offs	0	0
Recoveries	20	47
Provisions (credit)	44	(206)
Ending Balance	1,273	1,720	1,337	1,273	1,561
Ending balance: individually evaluated for impairment			3	3
Ending balance: collectively evaluated for impairment			1,334	1,270
Loans, net:
Loans held-for-investment, net			37,470	34,893
Ending balance: individually evaluated for impairment			155	159
Ending balance: collectively evaluated for impairment			37,315	34,734
Other
Allowance for loan losses:
Beginning Balance	94	96
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	19	(24)
Ending Balance	94	96	113	94	72
Ending balance: individually evaluated for impairment			0	0
Ending balance: collectively evaluated for impairment			113	94
Loans, net:
Loans held-for-investment, net			1,673	1,432
Ending balance: individually evaluated for impairment			0	0
Ending balance: collectively evaluated for impairment			1,673	1,432
Unallocated
Allowance for loan losses:
Beginning Balance	0	0
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	0	0
Ending Balance	0	0	0	0	0
Originated Loans Total
Allowance for loan losses:
Beginning Balance	25,172	23,624
Charge-offs	(63)	(4)
Recoveries	36	342
Provisions (credit)	73	392
Ending Balance	25,172	23,624	25,218	25,172	24,354
Ending balance: individually evaluated for impairment			52	45
Ending balance: collectively evaluated for impairment			25,166	25,127
Loans, net:
Loans held-for-investment, net			2,427,755	2,425,275
Ending balance: individually evaluated for impairment			19,364	19,542
Ending balance: collectively evaluated for impairment			2,408,391	2,405,733
Purchased Credit-Impaired
Allowance for loan losses:
Beginning Balance	951	896
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	0	0
Ending Balance	951	896	951	951	896
Ending balance: individually evaluated for impairment			0	0
Ending balance: collectively evaluated for impairment			951	951
Loans, net:
Loans held-for-investment, net			22,084	22,741
Ending balance: individually evaluated for impairment			0	0
Ending balance: collectively evaluated for impairment			22,084	22,741
Acquired Loans
Allowance for loan losses:
Beginning Balance	37	75
Charge-offs	(1)	(23)
Recoveries	6	2
Provisions (credit)	(39)	(20)
Ending Balance	37	75	3	37	34
Ending balance: individually evaluated for impairment			3	37
Ending balance: collectively evaluated for impairment			0	0
Loans, net:
Loans held-for-investment, net			696,695	692,803
Ending balance: individually evaluated for impairment			1,225	1,543
Ending balance: collectively evaluated for impairment			695,470	691,260
Real Estate Loans | Commercial mortgage
Allowance for loan losses:
Beginning Balance	5,196	5,432
Charge-offs	(3)	(4)
Recoveries	16	17
Provisions (credit)	4	(214)
Ending Balance	5,196	5,432	5,213	5,196	5,231
Ending balance: individually evaluated for impairment			4	0
Ending balance: collectively evaluated for impairment			5,209	5,196
Loans, net:
Loans held-for-investment, net			446,879	445,781
Ending balance: individually evaluated for impairment			15,873	16,008
Ending balance: collectively evaluated for impairment			431,006	429,773
Real Estate Loans | One-to-four family residential mortgage
Allowance for loan losses:
Beginning Balance	503	664
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	(48)	(15)
Ending Balance	503	664	455	503	649
Ending balance: individually evaluated for impairment			35	38
Ending balance: collectively evaluated for impairment			420	465
Loans, net:
Loans held-for-investment, net			99,991	101,650
Ending balance: individually evaluated for impairment			1,977	1,996
Ending balance: collectively evaluated for impairment			98,014	99,654
Real Estate Loans | Construction and land
Allowance for loan losses:
Beginning Balance	610	172
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	(147)	(7)
Ending Balance	610	172	463	610	165
Ending balance: individually evaluated for impairment			0	0
Ending balance: collectively evaluated for impairment			463	610
Loans, net:
Loans held-for-investment, net			28,965	34,620
Ending balance: individually evaluated for impairment			0	0
Ending balance: collectively evaluated for impairment			28,965	34,620
Real Estate Loans | Multifamily
Allowance for loan losses:
Beginning Balance	17,374	14,952
Charge-offs	0	0
Recoveries	0	278
Provisions (credit)	38	954
Ending Balance	17,374	14,952	17,412	17,374	16,184
Ending balance: individually evaluated for impairment			0	0
Ending balance: collectively evaluated for impairment			17,412	17,374
Loans, net:
Loans held-for-investment, net			1,743,665	1,739,220
Ending balance: individually evaluated for impairment			1,292	1,310
Ending balance: collectively evaluated for impairment			1,742,373	1,737,910
Real Estate Loans | Home equity and lines of credit
Allowance for loan losses:
Beginning Balance	122	588
Charge-offs	(60)	0
Recoveries	0	0
Provisions (credit)	163	(96)
Ending Balance	$ 122	$ 588	225	122	$ 492
Ending balance: individually evaluated for impairment			10	4
Ending balance: collectively evaluated for impairment			215	118
Loans, net:
Loans held-for-investment, net			69,112	67,679
Ending balance: individually evaluated for impairment			67	69
Ending balance: collectively evaluated for impairment			$ 69,045	$ 67,610

Loans - Narrative, Loan-to-Valu

Loans - Narrative, Loan-to-Value Ratios (Details)	Mar. 31, 2018
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan to value ratio, less than	35.00%
One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [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	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 2,427,755	$ 2,425,275
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,406,418	2,403,739
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,449	5,759
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	17,888	15,777
Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	37,470	34,893
Commercial and industrial loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	36,756	34,141
Commercial and industrial loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	536	571
Commercial and industrial loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	178	181
Other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,673	1,432
Other | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,673	1,432
Other | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Real Estate Loans | Multifamily | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	133,669	131,792
Real Estate Loans | Multifamily | Less Than 35% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	133,669	131,792
Real Estate Loans | Multifamily | Less Than 35% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Real Estate Loans | Multifamily | Less Than 35% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Real Estate Loans | Multifamily | Equal to or Greater than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,609,996	1,607,428
Real Estate Loans | Multifamily | Equal to or Greater than 35% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,606,547	1,603,947
Real Estate Loans | Multifamily | Equal to or Greater than 35% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	633	1,897
Real Estate Loans | Multifamily | Equal to or Greater than 35% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,816	1,584
Real Estate Loans | Commercial mortgage | Less Than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	58,306	85,030
Real Estate Loans | Commercial mortgage | Less Than 35% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	57,900	84,620
Real Estate Loans | Commercial mortgage | Less Than 35% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	406	410
Real Estate Loans | Commercial mortgage | Less Than 35% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Real Estate Loans | Commercial mortgage | Equal to or Greater than 35% LTV
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	388,573	360,751
Real Estate Loans | Commercial mortgage | Equal to or Greater than 35% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	374,775	346,857
Real Estate Loans | Commercial mortgage | Equal to or Greater than 35% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,168	2,170
Real Estate Loans | Commercial mortgage | Equal to or Greater than 35% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	12,630	11,724
Real Estate Loans | One-to-four family residential mortgage | Less Than 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	62,576	62,553
Real Estate Loans | One-to-four family residential mortgage | Less Than 60% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	60,442	60,400
Real Estate Loans | One-to-four family residential mortgage | Less Than 60% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	678	683
Real Estate Loans | One-to-four family residential mortgage | Less Than 60% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,456	1,470
Real Estate Loans | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	37,415	39,097
Real Estate Loans | One-to-four family residential mortgage | Equal to or Greater than 60% LTV | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	36,829	38,504
Real Estate Loans | One-to-four family residential mortgage | Equal to or Greater than 60% LTV | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Real Estate Loans | One-to-four family residential mortgage | Equal to or Greater than 60% LTV | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	586	593
Real Estate Loans | Construction and land
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	28,965	34,620
Real Estate Loans | Construction and land | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	28,965	34,620
Real Estate Loans | Construction and land | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Real Estate Loans | Construction and land | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Real Estate Loans | Home equity and lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	69,112	67,679
Real Estate Loans | Home equity and lines of credit | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	68,862	67,426
Real Estate Loans | Home equity and lines of credit | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	28	28
Real Estate Loans | Home equity and lines of credit | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 222	$ 225

Loans - Narrative, Loans (Detai

Loans - Narrative, Loans (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Investment in non accrual loans	$ 5,600,000	$ 5,500,000
Criteria days for delinquent status	90 days
Impairment of loans	$ 3,000,000	3,100,000
Principal balance of loans on non accrual status, less then	500,000
Loans on non accrual status with principal balances below threshold definition of an impaired loan	2,600,000	2,400,000
Loans held-for-sale, non-accrual	0	0
90 days or more past due and accruing	58,000	28,000
Impaired loans not written down	$ 13,200,000	$ 14,500,000

Loans - PCI Loan Pools (Details

Loans - PCI Loan Pools (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
90 Days or More Past Due and Accruing	$ 58	$ 28
Nonperforming Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	5,594	5,508
90 Days or More Past Due and Accruing	58	28
Total Non-Performing Loans	5,652	5,536
Nonperforming Receivable | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,749	3,775
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	3,749	3,775
Nonperforming Receivable | Loans Held For Investment | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,029	3,051
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	3,029	3,051
Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	569
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	569
Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	531
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	531
Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		573
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		573
Nonperforming Receivable | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	79	79
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	79	79
Nonperforming Receivable | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	72	72
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	72	72
Nonperforming Receivable | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,845	1,733
90 Days or More Past Due and Accruing	58	28
Total Non-Performing Loans	1,903	1,761
Nonperforming Receivable | Loans acquired | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,123	1,036
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	1,123	1,036
Nonperforming Receivable | Loans acquired | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	228	201
90 Days or More Past Due and Accruing	58	27
Total Non-Performing Loans	286	228
Nonperforming Receivable | Loans acquired | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	417	417
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	417	417
Nonperforming Receivable | Loans acquired | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	77	77
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	77	77
Nonperforming Receivable | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		2
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		2
Nonperforming Receivable | Substandard | Loans Held For Investment | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,029	3,051
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	3,029	3,051
Nonperforming Receivable | Substandard | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	531	534
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	531	534
Nonperforming Receivable | Substandard | Loans Held For Investment | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	38	39
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	38	39
Nonperforming Receivable | Substandard | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	79	79
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	79	79
Nonperforming Receivable | Substandard | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	72	72
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	72	72
Nonperforming Receivable | Substandard | Loans acquired | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	294	205
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	294	205
Nonperforming Receivable | Substandard | Loans acquired | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	829	831
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	829	831
Nonperforming Receivable | Substandard | Loans acquired | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	228	201
90 Days or More Past Due and Accruing	58	27
Total Non-Performing Loans	286	228
Nonperforming Receivable | Substandard | Loans acquired | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	417	417
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	417	417
Nonperforming Receivable | Substandard | Loans acquired | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	77	77
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	77	77
Nonperforming Receivable | Substandard | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		2
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		2
Nonperforming Receivable | Pass | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
90 Days or More Past Due and Accruing		1
Total Non-Performing Loans		1
0-29 Days Past Due | Nonperforming Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	80	511
0-29 Days Past Due | Nonperforming Receivable | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	79	511
0-29 Days Past Due | Nonperforming Receivable | Loans Held For Investment | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	432
0-29 Days Past Due | Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
0-29 Days Past Due | Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
0-29 Days Past Due | Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
0-29 Days Past Due | Nonperforming Receivable | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	79	79
0-29 Days Past Due | Nonperforming Receivable | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
0-29 Days Past Due | Nonperforming Receivable | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1	0
0-29 Days Past Due | Nonperforming Receivable | Loans acquired | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
0-29 Days Past Due | Nonperforming Receivable | Loans acquired | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1	0
0-29 Days Past Due | Nonperforming Receivable | Loans acquired | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
0-29 Days Past Due | Nonperforming Receivable | Loans acquired | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
0-29 Days Past Due | Nonperforming Receivable | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
0-29 Days Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	432
0-29 Days Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
0-29 Days Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
0-29 Days Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	79	79
0-29 Days Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
0-29 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
0-29 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
0-29 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1	0
0-29 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
0-29 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
0-29 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
0-29 Days Past Due | Nonperforming Receivable | Pass | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
30-89 Days Past Due | Nonperforming Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,344	1,939
30-89 Days Past Due | Nonperforming Receivable | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	928	520
30-89 Days Past Due | Nonperforming Receivable | Loans Held For Investment | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	725	314
30-89 Days Past Due | Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	203
30-89 Days Past Due | Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	203
30-89 Days Past Due | Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		206
30-89 Days Past Due | Nonperforming Receivable | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
30-89 Days Past Due | Nonperforming Receivable | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
30-89 Days Past Due | Nonperforming Receivable | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,416	1,419
30-89 Days Past Due | Nonperforming Receivable | Loans acquired | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	771	773
30-89 Days Past Due | Nonperforming Receivable | Loans acquired | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	200	201
30-89 Days Past Due | Nonperforming Receivable | Loans acquired | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	417	417
30-89 Days Past Due | Nonperforming Receivable | Loans acquired | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	28	28
30-89 Days Past Due | Nonperforming Receivable | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
30-89 Days Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	725	314
30-89 Days Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	203	206
30-89 Days Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
30-89 Days Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
30-89 Days Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
30-89 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
30-89 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	771	773
30-89 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	200	201
30-89 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	417	417
30-89 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	28	28
30-89 Days Past Due | Nonperforming Receivable | Substandard | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
30-89 Days Past Due | Nonperforming Receivable | Pass | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
90 Days or More Past Due | Nonperforming Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,170	3,058
90 Days or More Past Due | Nonperforming Receivable | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,742	2,744
90 Days or More Past Due | Nonperforming Receivable | Loans Held For Investment | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,304	2,305
90 Days or More Past Due | Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	366
90 Days or More Past Due | Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	328
90 Days or More Past Due | Nonperforming Receivable | Loans Held For Investment | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		367
90 Days or More Past Due | Nonperforming Receivable | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
90 Days or More Past Due | Nonperforming Receivable | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	72
90 Days or More Past Due | Nonperforming Receivable | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	428	314
90 Days or More Past Due | Nonperforming Receivable | Loans acquired | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	352	263
90 Days or More Past Due | Nonperforming Receivable | Loans acquired | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	27	0
90 Days or More Past Due | Nonperforming Receivable | Loans acquired | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
90 Days or More Past Due | Nonperforming Receivable | Loans acquired | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	49	49
90 Days or More Past Due | Nonperforming Receivable | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		2
90 Days or More Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,304	2,305
90 Days or More Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	328	328
90 Days or More Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	38	39
90 Days or More Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
90 Days or More Past Due | Nonperforming Receivable | Substandard | Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	72	72
90 Days or More Past Due | Nonperforming Receivable | Substandard | Loans acquired | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	294	205
90 Days or More Past Due | Nonperforming Receivable | Substandard | Loans acquired | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	58	58
90 Days or More Past Due | Nonperforming Receivable | Substandard | Loans acquired | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	27	0
90 Days or More Past Due | Nonperforming Receivable | Substandard | Loans acquired | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
90 Days or More Past Due | Nonperforming Receivable | Substandard | Loans acquired | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 49	49
90 Days or More Past Due | Nonperforming Receivable | Substandard | Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		2
90 Days or More Past Due | Nonperforming Receivable | Pass | Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		$ 0

Loans - Loans Held-for-Investme

Loans - Loans Held-for-Investment by Performing and Non-Performing Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	$ 2,427,755	$ 2,425,275
Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	5,594	5,508
Non-Performing Loans	5,652	5,536
Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,427,755	2,425,275
Loans Held For Investment | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	446,879	445,781
Loans Held For Investment | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	58,306	85,030
Loans Held For Investment | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	388,573	360,751
Loans Held For Investment | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	57,900	84,620
Loans Held For Investment | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	374,775	346,857
Loans Held For Investment | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	12,630	11,724
Loans Held For Investment | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	406	410
Loans Held For Investment | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,168	2,170
Loans Held For Investment | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	99,991	101,650
Loans Held For Investment | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	62,576	62,553
Loans Held For Investment | 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	37,415	39,097
Loans Held For Investment | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	60,442	60,400
Loans Held For Investment | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	36,829	38,504
Loans Held For Investment | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,456	1,470
Loans Held For Investment | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	586	593
Loans Held For Investment | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	678	683
Loans Held For Investment | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	28,965	34,620
Loans Held For Investment | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	28,965	34,620
Loans Held For Investment | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,743,665	1,739,220
Loans Held For Investment | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	133,669	131,792
Loans Held For Investment | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,609,996	1,607,428
Loans Held For Investment | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	133,669	131,792
Loans Held For Investment | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,606,547	1,603,947
Loans Held For Investment | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	2,816	1,584
Loans Held For Investment | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	633	1,897
Loans Held For Investment | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	69,112	67,679
Loans Held For Investment | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	68,862	67,426
Loans Held For Investment | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	222	225
Loans Held For Investment | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	28	28
Loans Held For Investment | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	37,470	34,893
Loans Held For Investment | Commercial and industrial loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	36,756	34,141
Loans Held For Investment | Commercial and industrial loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	178	181
Loans Held For Investment | Commercial and industrial loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	536	571
Loans Held For Investment | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,673	1,432
Loans Held For Investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,424,006	2,421,500
Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	443,850	442,730
Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	58,306	85,030
Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	385,544	357,700
Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	57,900	84,620
Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	374,775	346,857
Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	9,601	8,673
Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	406	410
Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,168	2,170
Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	99,422	101,077
Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	62,045	62,019
Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	37,377	39,058
Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	60,442	60,400
Loans Held For Investment | Performing (Accruing) Loans | 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	36,829	38,504
Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	925	936
Loans Held For Investment | Performing (Accruing) Loans | 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	548	554
Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	678	683
Loans Held For Investment | Performing (Accruing) Loans | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	28,965	34,620
Loans Held For Investment | Performing (Accruing) Loans | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	28,965	34,620
Loans Held For Investment | Performing (Accruing) Loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,743,665	1,739,220
Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	133,669	131,792
Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,609,996	1,607,428
Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	133,669	131,792
Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,606,547	1,603,947
Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,816	1,584
Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	633	1,897
Loans Held For Investment | Performing (Accruing) Loans | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	69,033	67,600
Loans Held For Investment | Performing (Accruing) Loans | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	68,862	67,426
Loans Held For Investment | Performing (Accruing) Loans | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	143	146
Loans Held For Investment | Performing (Accruing) Loans | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	28	28
Loans Held For Investment | Performing (Accruing) Loans | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	37,398	34,821
Loans Held For Investment | Performing (Accruing) Loans | Commercial and industrial loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	36,756	34,141
Loans Held For Investment | Performing (Accruing) Loans | Commercial and industrial loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	106	109
Loans Held For Investment | Performing (Accruing) Loans | Commercial and industrial loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	536	571
Loans Held For Investment | Performing (Accruing) Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,673	1,432
Loans Held For Investment | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	3,749	3,775
Loans Held For Investment | Non-Performing Loans | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	3,029	3,051
Loans Held For Investment | Non-Performing Loans | 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 | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	3,029	3,051
Loans Held For Investment | Non-Performing Loans | 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 | 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 | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	3,029	3,051
Loans Held For Investment | Non-Performing Loans | 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 | 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 | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	569	573
Loans Held For Investment | Non-Performing Loans | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	531	534
Loans Held For Investment | Non-Performing Loans | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	38	39
Loans Held For Investment | Non-Performing Loans | 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 | 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 | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	531	534
Loans Held For Investment | Non-Performing Loans | 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	38	39
Loans Held For Investment | Non-Performing Loans | 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 | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | 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 | 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 | 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 | 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 | 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 | 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 | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	79	79
Loans Held For Investment | Non-Performing Loans | 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 | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	79	79
Loans Held For Investment | Non-Performing Loans | 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 loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	72	72
Loans Held For Investment | Non-Performing Loans | Commercial and industrial loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Commercial and industrial loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	72	72
Loans Held For Investment | Non-Performing Loans | Commercial and industrial loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	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]
Originated loans held-for-investment, net	696,695	692,803
Loans acquired | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	159,853	163,962
Loans acquired | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	49,774	50,582
Loans acquired | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	110,079	113,380
Loans acquired | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	49,306	50,105
Loans acquired | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	105,023	108,283
Loans acquired | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	378	386
Loans acquired | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	4,924	4,964
Loans acquired | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	90	91
Loans acquired | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	132	133
Loans acquired | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	289,071	275,053
Loans acquired | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	263,977	251,623
Loans acquired | 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	25,094	23,430
Loans acquired | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	263,062	250,373
Loans acquired | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	24,961	23,295
Loans acquired | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	480	795
Loans acquired | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	133	135
Loans acquired | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	435	455
Loans acquired | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	14,928	17,201
Loans acquired | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	14,928	17,201
Loans acquired | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	197,712	199,149
Loans acquired | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	188,409	189,782
Loans acquired | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	9,303	9,367
Loans acquired | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	188,186	189,551
Loans acquired | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	8,886	8,950
Loans acquired | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	152	153
Loans acquired | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	417	417
Loans acquired | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	71	78
Loans acquired | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	19,449	20,455
Loans acquired | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	19,287	20,291
Loans acquired | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	162	164
Loans acquired | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	15,659	16,946
Loans acquired | Commercial and industrial loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	15,659	16,944
Loans acquired | Commercial and industrial loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		2
Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net		37
Loans acquired | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	23
Loans acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	694,792	691,042
Loans acquired | Performing (Accruing) Loans | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	158,730	162,926
Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	49,480	50,377
Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	109,250	112,549
Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	49,306	50,105
Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	105,023	108,283
Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	84	181
Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,095	4,133
Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	90	91
Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	132	133
Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	288,785	274,825
Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	263,691	251,395
Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	25,094	23,430
Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	263,062	250,373
Loans acquired | Performing (Accruing) Loans | 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	24,961	23,295
Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	194	567
Loans acquired | Performing (Accruing) Loans | 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	133	135
Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	435	455
Loans acquired | Performing (Accruing) Loans | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	14,928	17,201
Loans acquired | Performing (Accruing) Loans | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	14,928	17,201
Loans acquired | Performing (Accruing) Loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	197,295	198,732
Loans acquired | Performing (Accruing) Loans | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	188,409	189,782
Loans acquired | Performing (Accruing) Loans | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,886	8,950
Loans acquired | Performing (Accruing) Loans | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	188,186	189,551
Loans acquired | Performing (Accruing) Loans | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,886	8,950
Loans acquired | Performing (Accruing) Loans | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	152	153
Loans acquired | Performing (Accruing) Loans | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
Loans acquired | Performing (Accruing) Loans | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	71	78
Loans acquired | Performing (Accruing) Loans | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	19,372	20,378
Loans acquired | Performing (Accruing) Loans | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	19,287	20,291
Loans acquired | Performing (Accruing) Loans | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	85	87
Loans acquired | Performing (Accruing) Loans | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	15,659	16,944
Loans acquired | Performing (Accruing) Loans | Commercial and industrial loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	15,659	16,944
Loans acquired | Performing (Accruing) Loans | Commercial and industrial loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
Loans acquired | Performing (Accruing) Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		36
Loans acquired | Performing (Accruing) Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	23
Loans acquired | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	1,903	1,761
Loans acquired | Non-Performing Loans | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	1,123	1,036
Loans acquired | Non-Performing Loans | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	294	205
Loans acquired | Non-Performing Loans | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	829	831
Loans acquired | Non-Performing Loans | 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 | 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 | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	294	205
Loans acquired | Non-Performing Loans | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	829	831
Loans acquired | Non-Performing Loans | 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 | 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 | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	286	228
Loans acquired | Non-Performing Loans | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	286	228
Loans acquired | Non-Performing Loans | One-to-four family residential mortgage | 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 | 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 | 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 | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	286	228
Loans acquired | Non-Performing Loans | 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	0	0
Loans acquired | Non-Performing Loans | 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 | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	417	417
Loans acquired | Non-Performing Loans | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	417	417
Loans acquired | Non-Performing Loans | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | 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 | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	417	417
Loans acquired | Non-Performing Loans | 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 | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	77	77
Loans acquired | Non-Performing Loans | 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 | 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 loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	2
Loans acquired | Non-Performing Loans | Commercial and industrial loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Commercial and industrial loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		2
Loans acquired | Non-Performing Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		1
Loans acquired | Non-Performing Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0
Total Loans Include Loans Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	3,124,450	3,118,078
Total Loans Include Loans Acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,118,798	3,112,542
Total Loans Include Loans Acquired | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	5,652	5,536
0-29 Days Past Due | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	80	511
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,415,571	2,410,842
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	440,905	439,356
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	57,674	84,620
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	383,231	354,736
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	57,674	84,620
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	374,775	346,229
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	7,632	7,675
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | 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 | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	824	832
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	96,324	97,287
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	58,947	58,229
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	37,377	39,058
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	58,022	57,907
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | 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	36,829	38,504
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	925	322
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | 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	548	554
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | 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 | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	28,965	34,614
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	28,965	34,614
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,741,860	1,735,923
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	133,669	131,488
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,608,191	1,604,435
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	133,669	131,488
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,605,986	1,603,714
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,572	83
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	633	638
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	68,567	67,600
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	68,396	67,426
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	143	146
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	28	28
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	37,306	34,659
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and industrial loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	36,664	34,003
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and industrial loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	106	109
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and industrial loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	536	547
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	1,644	1,403
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	690,663	689,656
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	157,468	161,954
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	49,410	50,126
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	108,058	111,828
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	49,236	50,035
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	104,388	108,125
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	84	0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,670	3,703
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	90	91
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	286,742	274,451
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	261,742	251,021
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	25,000	23,430
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	261,242	250,149
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | 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	24,867	23,295
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	65	417
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | 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	133	135
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	435	455
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	14,336	17,201
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	14,336	17,201
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	197,143	198,732
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	188,257	189,782
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,886	8,950
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	188,186	189,551
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,886	8,950
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | 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 | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	71	78
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	19,292	20,378
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	19,207	20,291
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	85	87
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	15,659	16,904
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and industrial loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	15,659	16,904
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and industrial loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		36
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	23
0-29 Days Past Due | Total Loans Include Loans Acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,106,234	3,100,498
30-89 Days Past Due | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,344	1,939
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,435	10,658
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,945	3,374
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	632	410
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,313	2,964
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	226	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	628
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,969	998
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	406	410
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	344	1,338
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,098	3,790
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,098	3,790
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | 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 Held For Investment | Performing (Accruing) Loans | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,420	2,493
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | 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 Held For Investment | Performing (Accruing) Loans | 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 | 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 | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	678	683
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | 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 | 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 | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,805	3,297
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	304
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,805	2,993
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	304
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	561	233
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,244	1,501
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | 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 | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	466	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	466	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | 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 | 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 loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	92	162
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and industrial loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	92	138
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and industrial loans | 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 loans | 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 | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	29	29
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,129	1,386
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,262	972
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	70	251
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,192	721
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	70	70
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	635	158
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	181
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	425	430
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | 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 | Commercial mortgage | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	132	133
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,043	374
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,949	374
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	94	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,820	224
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | 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	94	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	129	150
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | 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 | 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 | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	592	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	592	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	152	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	152	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | 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 | 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 | 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 | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	152	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | 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 | Multifamily | 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 | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	80	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	80	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | 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 loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	40
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and industrial loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	40
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and industrial loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
30-89 Days Past Due | Total Loans Include Loans Acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	$ 12,564	$ 12,044

Loans - Summary of Impaired Loa

Loans - Summary of Impaired Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 13,200	$ 14,500
Recorded investment	20,589	21,085
Unpaid Principal Balance	23,145	23,638
Impaired Financing Receivable, Related Allowance	(55)	(82)
Commercial mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment	15,873	16,008
Unpaid Principal Balance	17,714	17,849
Impaired Financing Receivable, Related Allowance	(4)	0
Commercial mortgage | Substandard | Less Than 35% LTV
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	0
Unpaid Principal Balance With No Related Allowance Recorded	139	139
Commercial mortgage | Substandard | Equal to or Greater than 35% LTV
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	9,692	9,745
Unpaid Principal Balance With No Related Allowance Recorded	10,508	10,560
Commercial mortgage | Pass | Equal to or Greater than 35% LTV
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	4,695	6,263
Recorded Investment With a Related Allowance Recorded	1,486	0
Unpaid Principal Balance With No Related Allowance Recorded	5,581	7,150
Unpaid Principal Balance With a Related Allowance Recorded	1,486	0
Impaired Financing Receivable, Related Allowance	(4)	0
One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment	3,050	3,387
Unpaid Principal Balance	3,295	3,628
Impaired Financing Receivable, Related Allowance	(38)	(75)
One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	252	251
Recorded Investment With a Related Allowance Recorded	678	997
Unpaid Principal Balance With No Related Allowance Recorded	252	251
Unpaid Principal Balance With a Related Allowance Recorded	678	997
Impaired Financing Receivable, Related Allowance	(35)	(49)
One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	133	135
Unpaid Principal Balance With No Related Allowance Recorded	285	286
One-to-four family residential mortgage | Pass | Less Than 60% LTV
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,177	1,189
Recorded Investment With a Related Allowance Recorded	408	411
Unpaid Principal Balance With No Related Allowance Recorded	1,245	1,254
Unpaid Principal Balance With a Related Allowance Recorded	408	411
Impaired Financing Receivable, Related Allowance	(3)	(7)
One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	402	136
Recorded Investment With a Related Allowance Recorded	0	268
Unpaid Principal Balance With No Related Allowance Recorded	427	161
Unpaid Principal Balance With a Related Allowance Recorded	0	268
Impaired Financing Receivable, Related Allowance	0	(19)
Multifamily
Financing Receivable, Impaired [Line Items]
Recorded investment	1,444	1,462
Unpaid Principal Balance	1,914	1,933
Impaired Financing Receivable, Related Allowance	0	0
Multifamily | Substandard | Less Than 35% LTV
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	152	153
Unpaid Principal Balance With No Related Allowance Recorded	152	153
Multifamily | Substandard | Equal to or Greater than 35% LTV
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,244	0
Unpaid Principal Balance With No Related Allowance Recorded	1,244	0
Multifamily | Pass | Equal to or Greater than 35% LTV
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	48	1,309
Unpaid Principal Balance With No Related Allowance Recorded	518	1,780
Home equity and lines of credit
Financing Receivable, Impaired [Line Items]
Recorded investment	67	69
Unpaid Principal Balance	67	69
Impaired Financing Receivable, Related Allowance	(10)	(4)
Home equity and lines of credit | Substandard
Financing Receivable, Impaired [Line Items]
Recorded Investment With a Related Allowance Recorded	35	36
Unpaid Principal Balance With a Related Allowance Recorded	35	36
Impaired Financing Receivable, Related Allowance	(10)	(4)
Home equity and lines of credit | Pass
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	32	33
Unpaid Principal Balance With No Related Allowance Recorded	32	33
Commercial and industrial loans
Financing Receivable, Impaired [Line Items]
Recorded investment	155	159
Unpaid Principal Balance	155	159
Impaired Financing Receivable, Related Allowance	(3)	(3)
Commercial and industrial loans | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	132	135
Unpaid Principal Balance With No Related Allowance Recorded	132	135
Commercial and industrial loans | Special Mention
Financing Receivable, Impaired [Line Items]
Recorded Investment With a Related Allowance Recorded	23	24
Unpaid Principal Balance With a Related Allowance Recorded	23	24
Impaired Financing Receivable, Related Allowance	$ (3)	$ (3)

Loans - Average Recorded Invest

Loans - Average Recorded Investment and Interest Recognized on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	$ 20,837	$ 25,463
Impaired Financing Receivable, Interest Income, Cash Basis Method	203	250
Commercial mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	15,940	19,599
Impaired Financing Receivable, Interest Income, Cash Basis Method	159	197
Commercial mortgage | Less Than 35% LTV | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	0	5
Commercial mortgage | Equal to or Greater than 35% LTV | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	9,718	13,699
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	75	128
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	1,010
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	0	0
Commercial mortgage | Equal to or Greater than 35% LTV | Pass
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	5,479	4,890
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	64	64
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	743	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	20	0
One-to-four family residential mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	3,218	3,427
Impaired Financing Receivable, Interest Income, Cash Basis Method	27	33
One-to-four family residential mortgage | Less Than 60% LTV | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	252	386
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	1	8
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	837	1,308
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	4	7
One-to-four family residential mortgage | Less Than 60% LTV | Pass
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,183	630
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	13	8
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	409	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	2	0
One-to-four family residential mortgage | Equal to or Greater than 60% LTV | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	134	450
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	3	5
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	379
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	0	1
One-to-four family residential mortgage | Equal to or Greater than 60% LTV | Pass
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	269	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	4	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	134	274
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	0	4
Multifamily
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	1,453	1,968
Impaired Financing Receivable, Interest Income, Cash Basis Method	16	17
Multifamily | Less Than 35% LTV | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	152	155
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	1	1
Multifamily | Equal to or Greater than 35% LTV | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	622	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	11	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	450
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	0	0
Multifamily | Equal to or Greater than 35% LTV | Pass
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	679	61
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	4	4
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	1,302
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	0	12
Home equity and lines of credit
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	68	333
Impaired Financing Receivable, Interest Income, Cash Basis Method	1	3
Home equity and lines of credit | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	35	38
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	0	0
Home equity and lines of credit | Pass
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	33	38
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	1	1
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	257
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	0	2
Commercial and industrial loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	158	136
Impaired Financing Receivable, Interest Income, Cash Basis Method	0	0
Commercial and industrial loans | Substandard
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	134	110
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	0	0
Commercial and industrial loans | Special Mention
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	24	26
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	$ 0	$ 0

Loans - Narrative, Troubled Deb

Loans - Narrative, Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)contract	Mar. 31, 2017contract	Dec. 31, 2017USD ($)
Financing Receivable, Modifications [Line Items]
Number of relationships (contract) | contract	0
Troubled debt restructurings	$ 17,800		$ 18,300
Number of TDR loans restructured that subsequently defaulted (contract) | contract	0	1
Criteria days for delinquent status	90 days
One-to-four family residential mortgage
Financing Receivable, Modifications [Line Items]
Number of relationships (contract) | contract	1
Pre-modification outstanding recorded investment	$ 256
Post-modification outstanding recorded investment	256
Troubled debt restructurings	$ 254
Criteria days for delinquent status	90 days

Deposits - Deposit Account Bala

Deposits - Deposit Account Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
Non-interest-bearing demand	$ 405,917	$ 407,267
Interest-bearing negotiable orders of withdrawal (NOW)	480,466	465,140
Savings and money market	1,190,872	1,225,643
Certificates of deposit	827,821	738,929
Total deposits	$ 2,905,076	$ 2,836,979

Deposits - Interest Expense On

Deposits - Interest Expense On Deposits (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Banking and Thrift [Abstract]
Negotiable orders of withdrawal, savings, and money market	$ 2,143	$ 2,030
Certificates of deposit	3,068	1,590
Total interest expense on deposit accounts	$ 5,211	$ 3,620

Equity Incentive Plan - Stock O

Equity Incentive Plan - Stock Options Outstanding (Details) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Number of Stock Options
Beginning Balance (shares)	4,620,687
Forfeited (shares)	(14,318)
Exercised (shares)	(530,180)
Ending Balance (shares)	4,076,189	4,620,687
Exercisable (shares)	2,577,157
Weighted Average Grant Date Fair Value
Beginning Balance (usd per share)	$ 3.51
Forfeited (usd per share)	2.65
Exercised (usd per share)	2.56
Ending Balance (usd per share)	3.63	$ 3.51
Exercisable (usd per share)	3.40
Weighted Average Exercise Price
Beginning Balance (usd per share)	11.82
Forfeited (usd per share)	8.51
Exercised (usd per share)	7.91
Ending Balance (usd per share)	12.34	$ 11.82
Exercisable (usd per share)	$ 11.35
Weighted Average Contractual Life (years)
Weighted Average Contractual Life, Outstanding	5 years 4 months 13 days	5 years 2 months 1 day
Weighted Average Contractual Life, Exercisable	4 years 6 months 10 days

Equity Incentive Plan - Narrati

Equity Incentive Plan - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 1.4	$ 1.6
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected future stock-based compensation expense	$ 3.2
Average period of expected future stock option expense	1 year 7 months 28 days
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected future stock-based compensation expense	$ 4.5
Average period of expected future stock option expense	1 year 8 months 5 days

Equity Incentive Plan - Status

Equity Incentive Plan - Status of the Company's Restricted Share Awards (Details)	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Number of Shares Awarded
Beginning Balance (shares) | shares	585,895
Forfeited (shares) | shares	(600)
Ending Balance (shares) | shares	585,295
Weighted Average Grant Date Fair Value
Beginning Balance (usd per share) | $ / shares	$ 14.05
Forfeited (usd per share) | $ / shares	13.13
Ending Balance (usd per share) | $ / shares	$ 14.05

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 9,822	$ 9,597
Measured on a recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	592,574	513,782
Trading securities	9,822	9,597
Total	602,568	523,702
Measured on a recurring basis | GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	475,198	445,224
Measured on a recurring basis | Non-GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	77	79
Measured on a recurring basis | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	331	349
Measured on a recurring basis | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	116,968	68,130
Measured on a recurring basis | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	172	323
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	0	0
Trading securities	9,822	9,597
Total	9,994	9,920
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	0	0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	0	0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	0	0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	0	0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	172	323
Measured on a recurring basis | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	592,574	513,782
Trading securities	0	0
Total	592,574	513,782
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	475,198	445,224
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Non-GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	77	79
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	331	349
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	116,968	68,130
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	0	0
Trading securities	0	0
Total	0	0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	0	0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Non-GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	0	0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	0	0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale	0	0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	0
Measured on a non-recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	7,295	6,462
Other real estate owned	850	850
Total	8,165	7,333
Measured on a non-recurring basis | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	6,040	4,645
Measured on a non-recurring basis | One-to-four family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,182	1,735
Measured on a non-recurring basis | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	48	51
Measured on a non-recurring basis | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	25	31
Measured on a non-recurring basis | Commercial and Industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial and industrial loans	20	21
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate owned	0	0
Total	0	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | One-to-four family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial and Industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial and industrial loans	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate owned	0	0
Total	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | One-to-four family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Commercial and Industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial and industrial loans	0	0
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	7,295	6,462
Other real estate owned	850	850
Total	8,165	7,333
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	6,040	4,645
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | One-to-four family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,182	1,735
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	48	51
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	25	31
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Commercial and Industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial and industrial loans	$ 20	$ 21

Fair Value Measurements - Quali

Fair Value Measurements - Qualitative Information for Level 3 Assets Measured at Fair Value on a Non-Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Unobservable Inputs One | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 7,315	$ 6,483
Valuation Methodology	Appraisals
Unobservable Inputs	Discount for costs to sell
Range of input (percent)	7.00%	7.00%
Unobservable Inputs One | Other real estate owned
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value	$ 850	$ 850
Valuation Methodology	Appraisals
Unobservable Inputs	Discount for costs to sell
Range of input (percent)	7.00%	7.00%
Unobservable Inputs Two | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Unobservable Inputs	Discount for quick sale
Range of input (percent)	10.00%	10.00%
Unobservable Inputs Three | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Valuation Methodology	Discounted cash flows
Unobservable Inputs	Interest rates
Unobservable Inputs Three | Minimum | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range of input (percent)	3.125%	3.13%
Unobservable Inputs Three | Maximum | Impaired loans
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Range of input (percent)	6.50%	6.75%

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Impaired loans held-for-investment and held-for-sale with outstanding principal balances	$ 9,700		$ 8,800
Estimated fair value of impaired loans held-for-investment and held-for-sale	7,300		6,500
Decrease in net impairment charges	27	$ 246
Assets acquired through foreclosure, or deed in lieu of foreclosure	$ 850		$ 850

Fair Value Measurements - Estim

Fair Value Measurements - Estimated Fair Values of the Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financial assets:
Trading securities	$ 9,822	$ 9,597
Debt securities available-for-sale	592,574	513,782
Debt securities held-to-maturity	9,636	9,892
Financial liabilities:
Equity securities not been classified in the fair value	1,000	1,000
Carrying Value
Financial assets:
Cash and cash equivalents	52,574	57,839
Trading securities	9,822	9,597
Debt securities available-for-sale	592,574	515,121
Debt securities held-to-maturity	9,873	9,931
Equity securities	172	323
Federal Home Loan Bank of New York stock, at cost	24,433	25,046
Net loans held-for-investment	3,120,362	3,114,659
Financial liabilities:
Deposits	2,905,076	2,836,979
Borrowed funds	456,272	471,549
Advance payments by borrowers for taxes and insurance	18,206	14,798
Estimated Fair Value
Financial assets:
Cash and cash equivalents	52,574	57,839
Trading securities	9,822	9,597
Debt securities available-for-sale	592,574	515,121
Debt securities held-to-maturity	9,636	9,892
Equity securities	172	323
Federal Home Loan Bank of New York stock, at cost	24,433	25,046
Net loans held-for-investment	3,170,626	3,157,829
Financial liabilities:
Deposits	2,906,045	2,839,666
Borrowed funds	488,615	466,625
Advance payments by borrowers for taxes and insurance	18,206	14,798
Estimated Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	52,574	57,839
Trading securities	9,822	9,597
Debt securities available-for-sale	0	0
Debt securities held-to-maturity	0	0
Equity securities	172	323
Federal Home Loan Bank of New York stock, at cost	0	0
Net loans held-for-investment	0	0
Financial liabilities:
Deposits	0	0
Borrowed funds	0	0
Advance payments by borrowers for taxes and insurance	0	0
Estimated Fair Value | Significant Other Observable Inputs (Level 2)
Financial assets:
Cash and cash equivalents	0	0
Trading securities	0	0
Debt securities available-for-sale	592,574	515,121
Debt securities held-to-maturity	9,636	9,892
Equity securities		0
Federal Home Loan Bank of New York stock, at cost	24,433	25,046
Net loans held-for-investment	0	0
Financial liabilities:
Deposits	0	2,839,666
Borrowed funds	488,615	466,625
Advance payments by borrowers for taxes and insurance	18,206	14,798
Estimated Fair Value | Significant Unobservable Inputs (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
Federal Home Loan Bank of New York stock, at cost	0	0
Net loans held-for-investment	3,170,626	3,157,829
Financial liabilities:
Deposits	2,906,045	0
Borrowed funds	0	0
Advance payments by borrowers for taxes and insurance	$ 0	$ 0

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 10,445	$ 9,948
Weighted average shares outstanding-basic (shares)	45,780,027	45,022,365
Effect of non-vested restricted stock and stock options outstanding (shares)	1,219,748	1,903,709
Weighted average shares outstanding-diluted (shares)	46,999,775	46,926,074
Earnings per share-basic (usd per share)	$ 0.23	$ 0.22
Earnings per share-diluted (usd per share)	$ 0.22	$ 0.21
Anti-dilutive shares (shares)	885,744	40,000

Commitments (Details)

Commitments (Details) - Brooklyn, New York $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)ft²term
Operating Leased Assets [Line Items]
Operating lease area (in square feet) | ft²	1,800
Term of lease	15 years
Number of renewal terms | term	3
Renewal term	5 years
Minimum rent obligations | $	$ 5.8

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue from Contract with Customer [Abstract]
Service charges	$ 841	$ 872
ATM and card interchange fees	267	260
Investment fees	106	86
Total fees and service charges for customer services	1,214	1,218
Income on bank owned life insurance	954	2,458
Gains on securities transactions, net	161	408
Other	76	63
Total non-interest income	$ 2,405	$ 4,147