Northfield Bancorp, Inc. (NFBK) 10-Q 11 May 20 2020 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2020	Apr. 30, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Entity File Number	001-35791
Entity Registrant Name	Northfield Bancorp, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	80-0882592
Entity Address, Address Line One	581 Main Street,
Entity Address, City or Town	Woodbridge,
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07095
City Area Code	732
Local Phone Number	499-7200
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	NFBK
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (shares)		49,291,928
Entity Central Index Key	0001493225
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS:
Cash and due from banks	$ 20,080	$ 15,409
Interest-bearing deposits in other financial institutions	94,619	132,409
Total cash and cash equivalents	114,699	147,818
Trading securities	8,388	11,222
Debt securities available-for-sale, at estimated fair value	1,061,443	1,138,352
Debt securities held-to-maturity, at amortized cost, (estimated fair value of $9,002 at March 31, 2020, and $8,886 at December 31, 2019)	8,706	8,762
Equity securities	3,483	3,341
Originated loans held-for-investment, net	3,098,760	2,987,067
Loans acquired	393,491	432,653
Purchased credit-impaired (“PCI”) loans held-for-investment	16,886	17,365
Loans held-for-investment, net	3,509,137	3,437,085
Allowance for loan losses	(36,800)	(28,707)
Net loans held-for-investment	3,472,337	3,408,378
Accrued interest receivable	14,298	14,609
Bank owned life insurance	154,333	153,459
Federal Home Loan Bank of New York stock, at cost	29,855	39,575
Premises and equipment, net	25,670	25,659
Goodwill	38,411	38,411
Operating lease right-of-use assets	41,473	39,504
Other assets	23,685	26,212
Total assets	4,996,781	5,055,302
LIABILITIES:
Deposits	3,485,546	3,408,233
Securities sold under agreements to repurchase	75,000	75,000
Other borrowings	641,357	782,004
Operating lease liabilities	45,932	44,069
Advance payments by borrowers for taxes and insurance	22,444	20,045
Accrued expenses and other liabilities	24,186	30,098
Total liabilities	4,294,465	4,359,449
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, 2020 and December 31, 2019, 49,291,928,347 and 49,175,437 outstanding at March 31, 2020, and December 31, 2019, respectively	609	609
Additional paid-in-capital	547,712	548,486
Unallocated common stock held by employee stock ownership plan	(19,492)	(19,740)
Retained earnings	321,981	322,581
Accumulated other comprehensive income	10,693	4,699
Treasury stock at cost: 11,641,779 and 11,758,360 shares at March 31, 2020, and December 31, 2019, respectively	(159,187)	(160,782)
Total stockholders’ equity	702,316	695,853
Total liabilities and stockholders’ equity	$ 4,996,781	$ 5,055,302

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Debt securities held-to-maturity	$ 9,002	$ 8,886
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)	49,291,928	49,175,347
Treasury stock, shares (shares)	11,641,779	11,758,360

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest income:
Loans	$ 35,337	$ 32,590
Mortgage-backed securities	5,622	4,074
Other securities	1,024	1,865
Federal Home Loan Bank of New York dividends	577	402
Deposits in other financial institutions	172	535
Total interest income	42,732	39,466
Interest expense:
Deposits	9,279	10,247
Borrowings	3,520	1,889
Total interest expense	12,799	12,136
Net interest income	29,933	27,330
Provision for loan losses	8,183	59
Net interest income after provision for loan losses	21,750	27,271
Non-interest income:
Fees and service charges for customer services	1,120	1,140
Income on bank owned life insurance	876	896
(Losses) gains on available-for-sale debt securities, net	(13)	155
(Losses) gains on trading securities, net	(1,992)	1,086
Other	117	37
Total non-interest income	108	3,314
Non-interest expense:
Compensation and employee benefits	7,289	11,020
Occupancy	3,060	3,282
Furniture and equipment	333	259
Data processing	1,460	1,263
Professional fees	1,109	747
Advertising	818	764
FDIC insurance	0	277
Other	1,613	1,592
Total non-interest expense	15,682	19,204
Income before income tax expense	6,176	11,381
Income tax expense	1,625	2,610
Net income	$ 4,551	$ 8,771
Net income per common share:
Basic (usd per share)	$ 0.10	$ 0.19
Diluted (usd per share)	$ 0.10	$ 0.19
Unrealized gains on debt securities available-for-sale:
Net unrealized holding gains	$ 8,310	$ 8,763
Less: reclassification adjustment for net losses (gains) included in net income	13	(155)
Net unrealized gains	8,323	8,608
Income tax expense related to net unrealized holding gains on debt securities available-for-sale	(2,326)	(2,453)
Income tax benefit related to reclassification adjustment for (losses) gains included in net income	(3)	43
Other comprehensive income, net of tax	5,994	6,198
Comprehensive income	$ 10,545	$ 14,969

Consolidated Statements of Chan

Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Unallocated Common Stock Held by the Employee Stock Ownership Plan	Retained Earnings	Accumulated Other Comprehensive Income (loss) Net of tax	Treasury Stock
Beginning Balance (shares) at Dec. 31, 2018		49,635,673
Beginning Balance at Dec. 31, 2018	$ 666,439	$ 609	$ 546,219	$ (20,992)	$ 302,544	$ (9,147)	$ (152,794)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,771				8,771
Other comprehensive income, net of tax	6,198					6,198
ESOP shares allocated or committed to be released	436		187	249
Stock compensation expense	1,328		1,328
Exercise of stock options, net (shares)		138,123
Exercise of stock options, net	995		(873)				1,868
Cash dividends declared and paid	(4,727)				(4,727)
Ending Balance (shares) at Mar. 31, 2019		49,773,796
Ending Balance at Mar. 31, 2019	679,440	$ 609	546,861	(20,743)	306,588	(2,949)	(150,926)
Beginning Balance (shares) at Dec. 31, 2019		49,175,347
Beginning Balance at Dec. 31, 2019	695,853	$ 609	548,486	(19,740)	322,581	4,699	(160,782)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,551				4,551
Other comprehensive income, net of tax	5,994					5,994
ESOP shares allocated or committed to be released	446		198	248
Stock compensation expense	448		448
Issuance of restricted stock (shares)		103,581
Issuance of restricted stock	$ 0		(1,416)				1,416
Exercise of stock options, net (shares)	13,000	13,000
Exercise of stock options, net	$ 175		(4)				179
Cash dividends declared and paid	(5,151)				(5,151)
Ending Balance (shares) at Mar. 31, 2020		49,291,928
Ending Balance at Mar. 31, 2020	$ 702,316	$ 609	$ 547,712	$ (19,492)	$ 321,981	$ 10,693	$ (159,187)

Consolidated Statements of Ch_2

Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared per share (usd per share)	$ 0.11	$ 0.10
Dividends paid per share (usd per share)	$ 0.11	$ 0.10

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Cash Flows [Abstract]
Net income	$ 4,551,000	$ 8,771,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	8,183,000	59,000
ESOP and stock compensation expense	894,000	1,764,000
Depreciation	795,000	771,000
Amortization of premiums, and deferred loan costs, net of (accretion) of discounts, and deferred loan fees	1,065,000	861,000
Amortization of intangible assets	55,000	69,000
Amortization of operating lease right-of-use assets	1,059,000	1,057,000
Income on bank owned life insurance	(876,000)	(896,000)
Losses (gains) on available-for-sale debt securities, net	13,000	(155,000)
Losses (gains) on trading securities, net	1,992,000	(1,086,000)
Net sales of trading securities	842,000	295,000
Decrease (increase) in accrued interest receivable	311,000	(246,000)
(Increase) decrease in other assets	(1,023,000)	3,118,000
Decrease in accrued expenses and other liabilities	(5,912,000)	(4,753,000)
Net cash provided by operating activities	11,949,000	9,629,000
Cash flows from investing activities:
Net increase in loans receivable	(72,609,000)	(11,156,000)
Purchases of Federal Home Loan Bank of New York stock	(7,515,000)	(1,125,000)
Redemptions of Federal Home Loan Bank of New York stock	17,235,000	1,125,000
Purchases of debt securities available-for-sale	(26,320,000)	(150,074,000)
Purchases of equity securities	(142,000)	(177,000)
Principal payments and maturities on debt securities available-for-sale	110,946,000	42,972,000
Principal payments and maturities on debt securities held-to-maturity	52,000	53,000
Proceeds from sale of debt securities available-for-sale	0	29,163,000
Proceeds from bank owned life insurance	2,000	0
Purchases and improvements of premises and equipment	(806,000)	(377,000)
Net cash provided by (used in) investing activities	20,843,000	(89,596,000)
Cash flows from financing activities:
Net increase in deposits	77,313,000	88,693,000
Dividends paid	(5,151,000)	(4,727,000)
Exercise of stock options	175,000	995,000
Increase in advance payments by borrowers for taxes and insurance	2,399,000	2,716,000
Repayments under capital lease obligations	0	(44,000)
Proceeds from securities sold under agreements to repurchase and other borrowings	220,353,000	25,397,000
Repayments related to securities sold under agreements to repurchase and other borrowings	(361,000,000)	(25,000,000)
Net cash (used in) provided by financing activities	(65,911,000)	88,030,000
Net (decrease) increase in cash and cash equivalents	(33,119,000)	8,063,000
Cash and cash equivalents at beginning of period	147,818,000	77,762,000
Cash and cash equivalents at end of period	114,699,000	85,825,000
Cash paid during the period for:
Interest	13,003,000	11,683,000
Income taxes	550,000	401,000
Non-cash transactions:
Loan charge-offs, net	90,000	70,000
Initial recognition of operating lease right-of use assets	0	43,560,000
Initial recognition of operating lease liabilities	$ 0	$ 47,328,000

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2020
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, collectively (the “ Company ” ). 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 statements of 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, 2020 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2020 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, estimated cash flows of our purchased credit-impaired (“PCI”) loans and the valuation allowance against deferred tax assets. 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 Company's Annual Report on Form 10-K for the year ended December 31, 2019 , as filed with the SEC. COVID-19 On March 13, 2020, the Coronavirus Disease (COVID-19) pandemic was declared a national emergency by the President of the United States. The spread of COVID-19 has negatively impacted the national and local economy, disrupted supply chains and increased unemployment levels. The resulting temporary closure of many businesses and the implementation of social distancing and stay-at-home policies has and will continue to impact many of the Company’s customers. While the full effects of the pandemic remain unknown, the Company is committed to supporting its customers, employees and communities during this difficult time. The Company has implemented temporary relief assistance to customers, including the consideration of various loan payment deferral and fee waiver options. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act was signed into law. It contains substantial tax and spending provisions intended to address the impact of the COVID-19 pandemic. The CARES Act includes a range of other provisions designed to support the U.S. economy and mitigate the impact of COVID-19 on financial institutions and their customers, including through the authorization of various relief programs and measures that the U.S. Department of the Treasury, the Small Business Administration, the Federal Reserve Board (“FRB”) and other federal banking agencies have implemented or may implement. Under the CARES Act, financial institutions are permitted to delay the adoption of the Financial Accounting Standards Board's (“FASB”) Accounting Standard Update (“ASU”) No. 2016-13, Financial Instruments - Credit Losses (Topic 326) (“CECL”) until the earlier of the termination date of the national emergency declaration or December 31, 2020. The Company has elected to defer the adoption of CECL, with an effective retrospective implementation date of January 1, 2020. The CARES Act also includes a provision that permits a financial institution to elect to suspend temporarily troubled debt restructuring (“TDR”) accounting under ASC Subtopic 310-40. To be eligible, a loan modification must be: (1) related to COVID-19; (2) executed on a loan that was not more than 30 days past due as of December 31, 2019; and (3) executed between March 1, 2020, and the earlier of (a) 60 days after the date of termination of the national emergency or (b) December 31, 2020. This includes short-term (e.g., up to six months) modifications such as payment deferrals, fee waivers, extensions of repayment terms, or delays in payment that are insignificant. Borrowers considered current are those that are less than 30 days past due on their contractual payments at the time a modification program is implemented. The banking regulators issued similar guidance, which also clarified that a COVID-19-related modification should not be considered a TDR if the borrower was current on payments at the time the underlying loan modification program was implemented and if the modification is considered to be short-term. For further details on loan deferrals see Note 14 - Subsequent Events. The Company continues to maintain a strong liquidity and capital position, despite the economic uncertainties presented by the COVID-19 pandemic. As of March 31, 2020, both the Company and the Bank's capital ratios were in excess of regulatory requirements and are currently classified as well capitalized. The Company maintains access to multiple sources of liquidity and expects to have sufficient funds available to meet current commitments in the normal course of business. Given the ongoing and dynamic nature of current economic circumstances, it is difficult to predict the full impact of the COVID-19 outbreak on our business. The extent of such impact will depend on future developments, which are highly uncertain, including when the coronavirus can be controlled and abated and when and how the economy may be reopened. As a result of the COVID-19 pandemic and the related adverse local and national economic consequences, we could be subject to certain risks, any of which could have a material, adverse effect on our business, financial condition, liquidity, and results of operations.

Debt Securities Available-for-S

Debt Securities Available-for-Sale	3 Months Ended
	Mar. 31, 2020
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, 2020 , and December 31, 2019 (in thousands): March 31, 2020 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises (GSE) $ 300,610 $ 10,340 $ 81 $ 310,869 Real estate mortgage investment conduits (REMICs): GSE 618,156 6,336 912 623,580 Non-GSE 51 — 2 49 918,817 16,676 995 934,498 Other debt securities: Municipal bonds 278 1 — 279 Corporate bonds 127,643 419 1,396 126,666 127,921 420 1,396 126,945 Total debt securities available-for-sale $ 1,046,738 $ 17,096 $ 2,391 $ 1,061,443 December 31, 2019 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: GSE $ 324,080 $ 6,081 $ 754 $ 329,407 REMICs: GSE 643,816 2,076 2,225 643,667 Non-GSE 53 — — 53 967,949 8,157 2,979 973,127 Other debt securities: Municipal bonds 296 3 — 299 Corporate bonds 163,725 1,214 13 164,926 164,021 1,217 13 165,225 Total debt securities available-for-sale $ 1,131,970 $ 9,374 $ 2,992 $ 1,138,352 The following is a summary of the expected maturity distribution of debt securities available-for-sale, other than mortgage-backed securities, at March 31, 2020 (in thousands): Available-for-sale Amortized cost Estimated fair value Due in one year or less $ 77,203 $ 76,941 Due after one year through five years 50,718 50,004 $ 127,921 $ 126,945 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 debt 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, 2020 , the fair value of debt securities available-for-sale that were pledged to secure borrowings and deposits was $732.0 million . For the three months ended March 31, 2020 , the Company had no gross proceeds on sales of debt securities available-for-sale, no gross realized gains, and gross realized losses of $13,000 , related to calls of securities. For the three months ended March 31, 2019 , the Company had gross proceeds of $29.2 million on sales of debt securities available-for-sale, with gross realized gains of $155,000 and no gross realized losses. The Company recognized net losses of $2.0 million on its trading securities portfolio during the three months ended March 31, 2020 , and net gains of $1.1 million , during the three months ended March 31, 2019 . 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, 2020 , and December 31, 2019 , were as follows (in thousands): March 31, 2020 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 $ 4 $ 109 $ 77 $ 634 $ 81 $ 743 REMICs: GSE 665 135,392 247 24,351 912 159,743 Non-GSE — — 2 49 2 49 Other debt securities: Corporate bonds 1,396 57,948 — — 1,396 57,948 Total $ 2,065 $ 193,449 $ 326 $ 25,034 $ 2,391 $ 218,483 December 31, 2019 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 $ 25 $ 3,404 $ 729 $ 55,184 $ 754 $ 58,588 REMICs: GSE 950 197,634 1,275 54,555 2,225 252,189 Non-GSE — — — 53 — 53 Other debt securities: Corporate bonds — — 13 15,586 13 15,586 Total $ 975 $ 201,038 $ 2,017 $ 125,378 $ 2,992 $ 326,416 The Company held 12 pass-through mortgage-backed securities issued or guaranteed by GSEs, four REMIC mortgage-backed securities issued or guaranteed by GSEs, and one REMIC mortgage-backed security not issued or guaranteed by a GSE, that were in a continuous unrealized loss position of twelve months or greater at March 31, 2020 . There were two pass-through mortgage-backed securities issued or guaranteed by GSEs, 19 REMIC mortgage-backed securities issued or guaranteed by GSEs, two municipal bonds, and 11 corporate bonds that were in an unrealized loss position of less than twelve months at March 31, 2020 . All securities referred to above were rated investment grade at March 31, 2020 . Management evaluated these securities and concluded that the declines in fair value relate to the general interest rate environment and are considered temporary. The securities cannot be prepaid in a manner that would result in the Company not receiving 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 debt securities available-for-sale 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. The Company did no t recognize any other-than-temporary impairment charges during the three months ended March 31, 2020 , or March 31, 2019 At March 31, 2020 and December 31, 2019 , equity securities totaled $3.5 million and $3.3 million , respectively. Equity securities consist of money market mutual funds, recorded at fair value of $374,000 and $250,000 at March 31, 2020 and December 31, 2019 , respectively, and an investment in a private Small Business Administration (“SBA”) Loan Fund recorded at net asset value of $3.1 million at both March 31, 2020 and December 31, 2019

Debt Securities Held-to-Maturit

Debt Securities Held-to-Maturity	3 Months Ended
	Mar. 31, 2020
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, 2020 , and December 31, 2019 (in thousands): March 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 8,706 $ 296 $ — $ 9,002 Total securities held-to-maturity $ 8,706 $ 296 $ — $ 9,002 December 31, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 8,762 $ 129 $ 5 $ 8,886 Total securities held-to-maturity $ 8,762 $ 129 $ 5 $ 8,886 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, 2020 , or March 31, 2019 . At March 31, 2020 , debt securities held-to-maturity with a carrying value of $7.3 million were pledged to secure borrowings and deposits. At March 31, 2020 , there were no debt securities held-to-maturity in an unrealized loss position. Gross unrealized losses on mortgage-backed securities held-to-maturity, and the estimated fair value of the related securities, aggregated by security category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2019 , were as follows (in thousands): December 31, 2019 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 $ — $ — $ 5 $ 378 $ 5 $ 378 Total securities held-to-maturity $ — $ — $ 5 $ 378 $ 5 $ 378 The Company held no pass-through mortgage-backed securities held-to-maturity, issued or guaranteed by GSEs that were in a continuous unrealized loss position of greater than twelve months at March 31, 2020 . The fair values of our debt securities held-to-maturity 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. 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, 2020 , or March 31, 2019 .

Equity Securities

Equity Securities	3 Months Ended
	Mar. 31, 2020
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, 2020 , and December 31, 2019 (in thousands): March 31, 2020 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises (GSE) $ 300,610 $ 10,340 $ 81 $ 310,869 Real estate mortgage investment conduits (REMICs): GSE 618,156 6,336 912 623,580 Non-GSE 51 — 2 49 918,817 16,676 995 934,498 Other debt securities: Municipal bonds 278 1 — 279 Corporate bonds 127,643 419 1,396 126,666 127,921 420 1,396 126,945 Total debt securities available-for-sale $ 1,046,738 $ 17,096 $ 2,391 $ 1,061,443 December 31, 2019 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: GSE $ 324,080 $ 6,081 $ 754 $ 329,407 REMICs: GSE 643,816 2,076 2,225 643,667 Non-GSE 53 — — 53 967,949 8,157 2,979 973,127 Other debt securities: Municipal bonds 296 3 — 299 Corporate bonds 163,725 1,214 13 164,926 164,021 1,217 13 165,225 Total debt securities available-for-sale $ 1,131,970 $ 9,374 $ 2,992 $ 1,138,352 The following is a summary of the expected maturity distribution of debt securities available-for-sale, other than mortgage-backed securities, at March 31, 2020 (in thousands): Available-for-sale Amortized cost Estimated fair value Due in one year or less $ 77,203 $ 76,941 Due after one year through five years 50,718 50,004 $ 127,921 $ 126,945 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 debt 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, 2020 , the fair value of debt securities available-for-sale that were pledged to secure borrowings and deposits was $732.0 million . For the three months ended March 31, 2020 , the Company had no gross proceeds on sales of debt securities available-for-sale, no gross realized gains, and gross realized losses of $13,000 , related to calls of securities. For the three months ended March 31, 2019 , the Company had gross proceeds of $29.2 million on sales of debt securities available-for-sale, with gross realized gains of $155,000 and no gross realized losses. The Company recognized net losses of $2.0 million on its trading securities portfolio during the three months ended March 31, 2020 , and net gains of $1.1 million , during the three months ended March 31, 2019 . 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, 2020 , and December 31, 2019 , were as follows (in thousands): March 31, 2020 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 $ 4 $ 109 $ 77 $ 634 $ 81 $ 743 REMICs: GSE 665 135,392 247 24,351 912 159,743 Non-GSE — — 2 49 2 49 Other debt securities: Corporate bonds 1,396 57,948 — — 1,396 57,948 Total $ 2,065 $ 193,449 $ 326 $ 25,034 $ 2,391 $ 218,483 December 31, 2019 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 $ 25 $ 3,404 $ 729 $ 55,184 $ 754 $ 58,588 REMICs: GSE 950 197,634 1,275 54,555 2,225 252,189 Non-GSE — — — 53 — 53 Other debt securities: Corporate bonds — — 13 15,586 13 15,586 Total $ 975 $ 201,038 $ 2,017 $ 125,378 $ 2,992 $ 326,416 The Company held 12 pass-through mortgage-backed securities issued or guaranteed by GSEs, four REMIC mortgage-backed securities issued or guaranteed by GSEs, and one REMIC mortgage-backed security not issued or guaranteed by a GSE, that were in a continuous unrealized loss position of twelve months or greater at March 31, 2020 . There were two pass-through mortgage-backed securities issued or guaranteed by GSEs, 19 REMIC mortgage-backed securities issued or guaranteed by GSEs, two municipal bonds, and 11 corporate bonds that were in an unrealized loss position of less than twelve months at March 31, 2020 . All securities referred to above were rated investment grade at March 31, 2020 . Management evaluated these securities and concluded that the declines in fair value relate to the general interest rate environment and are considered temporary. The securities cannot be prepaid in a manner that would result in the Company not receiving 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 debt securities available-for-sale 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. The Company did no t recognize any other-than-temporary impairment charges during the three months ended March 31, 2020 , or March 31, 2019 At March 31, 2020 and December 31, 2019 , equity securities totaled $3.5 million and $3.3 million , respectively. Equity securities consist of money market mutual funds, recorded at fair value of $374,000 and $250,000 at March 31, 2020 and December 31, 2019 , respectively, and an investment in a private Small Business Administration (“SBA”) Loan Fund recorded at net asset value of $3.1 million at both March 31, 2020 and December 31, 2019

Loans

Loans	3 Months Ended
	Mar. 31, 2020
Receivables [Abstract]
Loans	Loans Net loans held-for-investment are as follows (in thousands): March 31, December 31, 2020 2019 Real estate loans: Multifamily $ 2,300,974 $ 2,196,407 Commercial mortgage 527,498 528,681 One-to-four family residential mortgage 84,880 83,742 Home equity and lines of credit 87,391 84,928 Construction and land 39,922 38,284 Total real estate loans 3,040,665 2,932,042 Commercial and industrial loans 49,210 45,328 Other loans 1,205 2,083 Total commercial and industrial and other loans 50,415 47,411 Deferred loan cost, net 7,680 7,614 Originated loans held-for-investment, net 3,098,760 2,987,067 PCI Loans 16,886 17,365 Loans acquired: One-to-four family residential mortgage 167,934 187,975 Multifamily 102,176 108,417 Commercial mortgage 102,284 113,027 Home equity and lines of credit 10,653 12,008 Construction and land 1,388 2,537 Total acquired real estate loans 384,435 423,964 Commercial and industrial loans 9,056 8,689 Total loans acquired, net 393,491 432,653 Loans held-for-investment, net 3,509,137 3,437,085 Allowance for loan losses (36,800 ) (28,707 ) Net loans held-for-investment $ 3,472,337 $ 3,408,378 There were no loans held-for-sale at March 31, 2020 , or December 31, 2019 . PCI loans totaled $16.9 million at March 31, 2020 , as compared to $17.4 million at December 31, 2019 . 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, 2020 , PCI loans consist of approximately 30% commercial real estate loans and 41% commercial and industrial loans, with the remaining balance in residential and home equity loans. At December 31, 2019 , PCI loans consist of approximately 29% commercial real estate loans and 42% 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, 2020 and March 31, 2019 (in thousands): At or for the three months ended March 31, 2020 2019 Balance at the beginning of period $ 17,086 $ 21,846 Accretion into interest income (803 ) (1,049 ) Balance at end of period $ 16,283 $ 20,797 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, 2020 , and March 31, 2019 (in thousands): Three Months Ended March 31, 2020 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: Beginning balance $ 4,756 $ 180 $ 536 $ 20,203 $ 317 $ 1,640 $ 151 $ 27,783 $ 789 $ 135 $ 28,707 Charge-offs — — — — — (37 ) — (37 ) — (433 ) (470 ) Recoveries 370 — — — — 2 — 372 — 8 380 Provisions (credit) 263 132 135 6,686 257 430 (65 ) 7,838 — 345 8,183 Ending balance $ 5,389 $ 312 $ 671 $ 26,889 $ 574 $ 2,035 $ 86 $ 35,956 $ 789 $ 55 $ 36,800 Three Months Ended March 31, 2019 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: Beginning balance $ 5,630 $ 342 $ 463 $ 18,084 $ 291 $ 1,569 $ 108 $ 26,487 $ 1,010 $ — $ 27,497 Charge-offs (6 ) — — — — (26 ) — (32 ) — (60 ) (92 ) Recoveries 13 — — — — — — 13 — 9 22 Provisions (credit) (255 ) 28 111 262 45 (167 ) (16 ) 8 — 51 59 Ending balance $ 5,382 $ 370 $ 574 $ 18,346 $ 336 $ 1,376 $ 92 $ 26,476 $ 1,010 $ — $ 27,486 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, 2020 , and December 31, 2019 (in thousands): March 31, 2020 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 $ — $ — $ — $ — $ 3 $ 4 $ — $ 7 $ — $ 55 $ 62 Ending balance: collectively evaluated for impairment $ 5,389 $ 312 $ 671 $ 26,889 $ 571 $ 2,031 $ 86 $ 35,949 $ 789 $ — $ 36,738 Loans, net: Ending balance $ 528,104 $ 86,404 $ 39,953 $ 2,304,387 $ 89,349 $ 49,358 $ 1,205 $ 3,098,760 $ 16,886 $ 393,491 $ 3,509,137 Ending balance: individually evaluated for impairment $ 11,815 $ 1,816 $ — $ 994 $ 53 $ 55 $ — $ 14,733 $ — $ 5,784 $ 20,517 Ending balance: collectively evaluated for impairment $ 516,289 $ 84,588 $ 39,953 $ 2,303,393 $ 89,296 $ 49,303 $ 1,205 $ 3,084,027 $ 16,886 $ 387,707 $ 3,488,620 December 31, 2019 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 $ — $ — $ — $ — $ 3 $ 4 $ — $ 7 $ — $ 135 $ 142 Ending balance: collectively evaluated for impairment $ 4,756 $ 180 $ 536 $ 20,203 $ 314 $ 1,636 $ 151 $ 27,776 $ 789 $ — $ 28,565 Loans, net: Ending balance $ 529,287 $ 85,355 $ 38,303 $ 2,199,734 $ 86,848 $ 45,456 $ 2,084 $ 2,987,067 $ 17,365 $ 432,653 $ 3,437,085 Ending balance: individually evaluated for impairment $ 13,226 $ 1,841 $ — $ 997 $ 55 $ 58 $ — $ 16,177 $ — $ 4,780 $ 20,957 Ending balance: collectively evaluated for impairment $ 516,061 $ 83,514 $ 38,303 $ 2,198,737 $ 86,793 $ 45,398 $ 2,084 $ 2,970,890 $ 17,365 $ 427,873 $ 3,416,128 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 provision for loan losses and the allowance for loan losses for originated loans held-for-investment. After determining the loss factor for each originated portfolio segment held-for-investment, the collectively evaluated for impairment balance of the held-for-investment portfolio is multiplied by the collectively evaluated for impairment loss factor for the respective portfolio segment in order to determine the allowance for loans collectively evaluated for impairment. 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, 2020 , and December 31, 2019 (in thousands): At March 31, 2020 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 $ 247,304 $ 2,051,039 $ 89,069 $ 432,711 $ 53,091 $ 30,953 $ 39,953 $ 89,082 $ 49,055 $ 1,205 $ 3,083,462 Special Mention 291 292 — — 770 — — 80 266 — 1,699 Substandard 298 5,163 — 6,324 1,563 27 — 187 37 — 13,599 Originated loans held-for-investment, net $ 247,893 $ 2,056,494 $ 89,069 $ 439,035 $ 55,424 $ 30,980 $ 39,953 $ 89,349 $ 49,358 $ 1,205 $ 3,098,760 At December 31, 2019 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 $ 232,950 $ 1,960,984 $ 79,485 $ 440,065 $ 52,886 $ 29,967 $ 38,303 $ 86,547 $ 45,075 $ 2,084 $ 2,968,346 Special Mention — 296 370 1,092 777 — — 14 301 — 2,850 Substandard 301 5,203 — 8,275 1,397 328 — 287 80 — 15,871 Originated loans held-for-investment, net $ 233,251 $ 1,966,483 $ 79,855 $ 449,432 $ 55,060 $ 30,295 $ 38,303 $ 86,848 $ 45,456 $ 2,084 $ 2,987,067 Included in loans receivable are loans for which the accrual of interest income has been discontinued due to deterioration in the financial condition of the borrowers. The recorded investment of these non-accrual loans was $8.8 million and $9.4 million at March 31, 2020 , and December 31, 2019 , 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. The non-accrual amounts included loans deemed to be impaired of $6.5 million and $6.8 million at March 31, 2020 , and December 31, 2019 , 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 $2.3 million at March 31, 2020 and $2.6 million at December 31, 2019 . There were no non-accrual loans held-for-sale at both March 31, 2020 and December 31, 2019 . Loans past due 90 days or more and still accruing interest were $656,000 at March 31, 2020 and $518,000 at December 31, 2019 , 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, 2020 , and December 31, 2019 , excluding PCI loans which have been segregated into pools. For PCI loans, each loan pool is accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows (in thousands): March 31, 2020 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 $ — $ — $ 1,108 $ 1,108 — $ 1,108 Total commercial — — 1,108 1,108 — 1,108 One-to-four family residential LTV < 60% Special Mention — — — — 173 173 Substandard 221 187 77 485 — 485 Total 221 187 77 485 173 658 LTV => 60% Substandard — 27 — 27 — 27 Total one-to-four family residential 221 214 77 512 173 685 Multifamily LTV => 35% Special Mention — — — — 291 291 Total multifamily — — — — 291 291 Home equity and lines of credit Substandard — 66 89 155 — 155 Total home equity and lines of credit — 66 89 155 — 155 Total non-performing loans held-for-investment, originated 221 280 1,274 1,775 464 2,239 Loans acquired: Real estate loans: Commercial LTV < 35% Substandard — 79 187 266 66 332 LTV => 35% Substandard 2,815 1,255 1,831 5,901 120 6,021 Total commercial 2,815 1,334 2,018 6,167 186 6,353 One-to-four family residential LTV < 60% Substandard — 189 85 274 6 280 LTV => 60% Substandard — — 93 93 — 93 Total one-to-four family residential — 189 178 367 6 373 Multifamily LTV < 35% Substandard 40 — — 40 — 40 LTV => 35% Substandard — 394 — 394 — 394 Total multifamily 40 394 — 434 — 434 Home equity and lines of credit - Substandard — — 28 28 — 28 Total non-performing loans acquired 2,855 1,917 2,224 6,996 192 7,188 Total non-performing loans $ 3,076 $ 2,197 $ 3,498 $ 8,771 $ 656 $ 9,427 December 31, 2019 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 $ 2,416 $ 2,416 $ 2,416 Total commercial — — 2,416 2,416 — 2,416 One-to-four family residential LTV < 60% Substandard — — 493 493 114 607 LTV => 60% Substandard — 29 — 29 — 29 Total one-to-four family residential — 29 493 522 114 636 Home equity and lines of credit Substandard — 67 89 156 — 156 Total home equity and lines of credit — 67 89 156 — 156 Total non-performing loans held-for-investment, originated — 96 2,998 3,094 114 3,208 Loans acquired: Real estate loans: Commercial LTV < 35% Substandard 79 — 188 267 66 333 LTV => 35% Substandard 3,530 — 1,709 5,239 187 5,426 Total commercial 3,609 — 1,897 5,506 253 5,759 One-to-four family residential LTV < 60% Substandard 190 — 85 275 151 426 LTV => 60% Substandard — — 93 93 — 93 Total one-to-four family residential 190 — 178 368 151 519 Multifamily LTV < 35% Substandard 40 — — 40 — 40 LTV => 35% Substandard — 397 — 397 — 397 Total multifamily 40 397 — 437 — 437 Home equity and lines of credit Substandard — — 28 28 — 28 Total home equity and lines of credit — — 28 28 — 28 Total non-performing loans acquired 3,839 397 2,103 6,339 404 6,743 Total non-performing loans $ 3,839 $ 493 $ 5,101 $ 9,433 $ 518 $ 9,951 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, 2020 , and December 31, 2019 (in thousands): March 31, 2020 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 $ 88,944 $ 125 $ 89,069 $ — $ 89,069 Total 88,944 125 89,069 — 89,069 LTV => 35% Pass 431,886 825 432,711 — 432,711 Substandard 248 4,968 5,216 1,108 6,324 Total 432,134 5,793 437,927 1,108 439,035 Total commercial 521,078 5,918 526,996 1,108 528,104 One-to-four family residential LTV < 60% Pass 53,067 22 53,089 — 53,089 Special Mention — 597 597 173 770 Substandard 1,079 — 1,079 485 1,564 Total 54,146 619 54,765 658 55,423 LTV => 60% Pass 29,106 1,848 30,954 — 30,954 Substandard — — — 27 27 Total 29,106 1,848 30,954 27 30,981 Total one-to-four family residential 83,252 2,467 85,719 685 86,404 Construction and land Pass 39,953 — 39,953 — 39,953 Total construction and land 39,953 — 39,953 — 39,953 Multifamily LTV < 35% Pass 247,304 — 247,304 — 247,304 Special Mention — — — 291 291 Substandard 298 — 298 — 298 Total 247,602 — 247,602 291 247,893 LTV => 35% Pass 2,051,038 — 2,051,038 — 2,051,038 Special Mention 292 — 292 — 292 Substandard 4,192 972 5,164 — 5,164 Total 2,055,522 972 2,056,494 — 2,056,494 Total multifamily 2,303,124 972 2,304,096 291 2,304,387 Home equity and lines of credit Pass 88,846 236 89,082 — 89,082 Special Mention 80 — 80 — 80 Substandard 32 — 32 155 187 Total home equity and lines of credit 88,958 236 89,194 155 89,349 Commercial and industrial Pass 48,689 366 49,055 — 49,055 Special Mention 266 — 266 — 266 Substandard — 37 37 — 37 Total commercial and industrial 48,955 403 49,358 — 49,358 March 31, 2020 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 1,205 — 1,205 1,205 Total originated loans held-for-investment 3,086,525 9,996 3,096,521 2,239 3,098,760 Acquired loans: Real estate loans: One-to-four family residential LTV < 60% Pass 152,130 1,279 153,409 — 153,409 Special Mention — 381 381 — 381 Substandard — — — 279 279 Total 152,130 1,660 153,790 279 154,069 LTV => 60% Pass 13,772 — 13,772 — 13,772 Substandard — — — 93 93 Total 13,772 — 13,772 93 13,865 Total one-to-four family residential 165,902 1,660 167,562 372 167,934 Commercial LTV < 35% Pass 34,004 315 34,319 — 34,319 Special Mention 994 95 1,089 — 1,089 Substandard 538 — 538 332 870 Total 35,536 410 35,946 332 36,278 LTV => 35% Pass 51,245 — 51,245 — 51,245 Special Mention 134 341 475 — 475 Substandard 6,783 1,482 8,265 6,021 14,286 Total 58,162 1,823 59,985 6,021 66,006 Total commercial 93,698 2,233 95,931 6,353 102,284 Construction and land Pass 1,388 — 1,388 — 1,388 Total construction and land 1,388 — 1,388 — 1,388 Multifamily LTV < 35% Pass 99,144 — 99,144 — 99,144 Substandard — — — 40 40 Total 99,144 — 99,144 40 99,184 LTV => 35% Pass 2,597 — 2,597 — 2,597 Substandard — — — 395 395 Total 2,597 — 2,597 395 2,992 Total multifamily 101,741 — 101,741 435 102,176 Home equity and lines of credit Pass 10,437 104 10,541 — 10,541 Substandard 84 — 84 28 112 Total home equity and lines of credit 10,521 104 10,625 28 10,653 Commercial and industrial Pass 9,056 — 9,056 — 9,056 Total commercial and industrial 9,056 — 9,056 — 9,056 Other loans - Pass — — — — — Total loans acquired 382,306 3,997 386,303 7,188 393,491 $ 3,468,831 $ 13,993 $ 3,482,824 $ 9,427 $ 3,492,251 December 31, 2019 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 $ 79,383 $ 102 $ 79,485 — $ 79,485 Special Mention 370 — 370 — 370 Total 79,753 102 79,855 — 79,855 LTV => 35% Pass 439,253 812 440,065 — 440,065 Special Mention 1,092 — 1,092 — 1,092 Substandard 5,228 631 5,859 2,416 8,275 Total 445,573 1,443 447,016 2,416 449,432 Total commercial 525,326 1,545 526,871 2,416 529,287 One-to-four family residential LTV < 60% Pass 52,757 129 52,886 — 52,886 Special Mention — 777 777 — 777 Substandard 790 — 790 607 1,397 Total 53,547 906 54,453 607 55,060 LTV => 60% Pass 29,741 226 29,967 — 29,967 Substandard 299 — 299 29 328 Total 30,040 226 30,266 29 30,295 Total one-to-four family residential 83,587 1,132 84,719 636 85,355 Construction and land Pass 38,156 147 38,303 — 38,303 Total construction and land 38,156 147 38,303 — 38,303 Multifamily LTV < 35% Pass 232,658 292 232,950 — 232,950 Substandard 301 — 301 — 301 Total 232,959 292 233,251 — 233,251 LTV => 35% Pass 1,960,729 255 1,960,984 — 1,960,984 Special Mention 296 — 296 — 296 Substandard 5,203 — 5,203 — 5,203 Total 1,966,228 255 1,966,483 — 1,966,483 Total multifamily 2,199,187 547 2,199,734 — 2,199,734 Home equity and lines of credit Pass 86,380 167 86,547 — 86,547 Special Mention 14 — 14 — 14 Substandard 131 — 131 156 287 Total home equity and lines of credit 86,525 167 86,692 156 86,848 Commercial and industrial loans Pass 44,886 189 45,075 — 45,075 Special Mention 301 — 301 — 301 Substandard 80 — 80 — 80 Total commercial and industrial loans 45,267 189 45,456 — 45,456 Other loans - Pass 2,058 26 2,084 — 2,084 Total originated loans held-for-investment 2,980,106 3,753 2,983,859 3,208 2,987,067 December 31, 2019 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 172,882 73 172,955 — 172,955 Special Mention — 385 385 — 385 Substandard — — — 426 426 Total 172,882 458 173,340 426 173,766 LTV => 60% Pass 14,116 — 14,116 — 14,116 Substandard — — — 93 93 Total 14,116 — 14,116 93 14,209 Total one-to-four family residential 186,998 458 187,456 519 187,975 Commercial LTV < 35% Pass 35,173 287 35,460 — 35,460 Special Mention 994 194 1,188 — 1,188 Substandard 369 — 369 334 703 Total 36,536 481 37,017 334 37,351 LTV => 35% Pass 60,311 — 60,311 — 60,311 Special Mention 134 464 598 — 598 Substandard 6,382 2,960 9,342 5,425 14,767 Total 66,827 3,424 70,251 5,425 75,676 Total commercial 103,363 3,905 107,268 5,759 113,027 Construction and land Pass 2,537 — 2,537 — 2,537 Total construction and land 2,537 — 2,537 — 2,537 Multifamily LTV < 35% Pass 105,327 — 105,327 — 105,327 Substandard — — — 40 40 Total 105,327 — 105,327 40 105,367 LTV => 35% Pass 2,653 — 2,653 — 2,653 Substandard — — — 397 397 Total 2,653 — 2,653 397 3,050 Total multifamily 107,980 — 107,980 437 108,417 Home equity and lines of credit Pass 11,842 50 11,892 — 11,892 Substandard 88 — 88 28 116 Total home equity and lines of credit 11,930 50 11,980 28 12,008 Commercial and industrial loans Pass 8,649 40 8,689 — 8,689 Total commercial and industrial loans 8,649 40 8,689 — 8,689 Other — — — — — Total loans acquired 421,457 4,453 425,910 6,743 432,653 $ 3,401,563 $ 8,206 $ 3,409,769 $ 9,951 $ 3,419,720 The following table summarizes originated and acquired impaired loans as of March 31, 2020 , and December 31, 2019 (in thousands): March 31, 2020 December 31, 2019 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance Related Allowance With No Allowance Recorded: Real estate loans: Commercial LTV < 35% Substandard $ — $ 139 $ — $ — $ 139 $ — LTV => 35% Pass 5,491 6,378 — 5,582 6,468 — Substandard 10,883 11,089 — 10,438 11,002 — One-to-four family residential LTV < 60% Pass 1,363 1,449 — 1,379 1,463 — Special Mention 382 382 — 385 385 — Substandard 556 556 — 564 564 — LTV => 60% Pass 120 154 — 122 154 — Substandard 27 27 — 29 29 — Multifamily LTV < 35% Substandard 40 40 — 40 40 — LTV => 35% Pass 22 493 — 26 496 — Substandard 972 972 — 972 972 — Home equity and lines of credit Pass 20 20 — 22 22 — Commercial and industrial loans Substandard 37 37 — 39 39 — With a Related Allowance Recorded: Real estate loans: Commercial LTV => 35% Substandard 553 1,419 (55 ) 1,307 1,307 (135 ) One-to-four family residential LTV < 60% Substandard — — — — — — Home equity and lines of credit Substandard 33 32 (3 ) 33 33 (3 ) Commercial and industrial loans Special Mention 18 18 (4 ) 19 19 (4 ) Total: Real estate loans Commercial 16,927 19,025 (55 ) 17,327 18,916 (135 ) One-to-four family residential 2,448 2,568 — 2,479 2,595 — Multifamily 1,034 1,505 — 1,038 1,508 — Home equity and lines of credit 53 52 (3 ) 55 55 (3 ) Commercial and industrial loans 55 55 (4 ) 58 58 (4 ) $ 20,517 $ 23,205 $ (62 ) $ 20,957 $ 23,132 $ (142 ) Included in the above tables at March 31, 2020 , are impaired loans with carrying balances of $16.2 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, 2019 , are loans with carrying balances of $15.9 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, 2020 , and December 31, 2019 , 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 and three months ended March 31, 2020 , and March 31, 2019 (in thousands): Three Months Ended March 31, 2020 March 31, 2019 Average Recorded Investment Interest Income Average Recorded Investment Interest Income With No Allowance Recorded: Real estate loans: Commercial LTV => 35% Pass $ 5,537 $ 75 $ 5,888 $ 78 Substandard 10,661 37 11,604 72 One-to-four family residential LTV < 60% Pass 1,371 16 1,677 22 Special Mention 384 5 — — Substandard 560 11 240 3 LTV => 60% Pass 121 1 128 1 Substandard 28 — 125 3 Multifamily LTV < 35% Substandard 40 — 100 1 LTV => 35% Pass 24 4 37 4 Substandard 972 9 1,227 20 Home equity and lines of credit Pass 21 — 27 — Commercial and industrial loans Substandard 38 — 50 — With a Related Allowance Recorded: Real estate loans: Commercial LTV => 35% Substandard 930 — 259 — One-to-four family residential LTV < 60% Substandard — — 502 5 Home equity and lines of credit Substandard 33 1 33 1 Commercial and industrial loans Special Mention 18 — 21 — Total: Real estate loans Commercial 17,128 112 17,751 150 One-to-four family residential 2,464 33 2,672 34 Multifamily 1,036 13 1,364 25 Home equity and lines of credit 54 1 60 1 Commercial and industrial loans 56 — 71 — $ 20,738 $ 159 $ 21,918 $ 210 There were no loans modified as troubled debt restructurings (TDRs) during the three months ended March 31, 2020 . There were two loans modified as TDRs during the three months ended March 31, 2019, both of which were modified to restructure payment terms. The following table summarizes loans that were modified in a TDR during the three months ended March 31, 2019: Three Months Ended March 31, 2019 Number of Relationships Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) (in thousands) Troubled Debt Restructurings Consumer 1 $ 2 $ 2 Commercial real estate 1 2,834 2,834 Total Troubled Debt Restructurings 2 $ 2,836 $ 2,836 (1) Amounts are at time of modification At March 31, 2020 , and December 31, 2019 , we had TDRs of $17.1 million and $18.5 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, 2020 , there was one TDR with a balance of $27,000 , that was restructured during the preceding twelve months that subsequently defaulted. At March 31, 2019 , there were no

Deposits

Deposits	3 Months Ended
	Mar. 31, 2020
Banking and Thrift [Abstract]
Deposits	Deposits Deposits account balances are summarized as follows (in thousands): March 31, 2020 December 31, 2019 Non-interest-bearing checking $ 394,836 $ 387,409 Negotiable orders of withdrawal (NOW) and interest-bearing checking 605,652 573,927 Savings and money market 1,385,593 1,398,345 Certificates of deposit 1,099,465 1,048,552 Total deposits $ 3,485,546 $ 3,408,233 Interest expense on deposit accounts is summarized for the periods indicated (in thousands): Three Months Ended March 31, 2020 2019 NOW and interest-bearing checking, savings, and money market $ 4,073 $ 4,794 Certificates of deposit 5,206 5,453 Total interest expense on deposit accounts $ 9,279 $ 10,247

Equity Incentive Plans

Equity Incentive Plans	3 Months Ended
	Mar. 31, 2020
Share-based Payment Arrangement [Abstract]
Equity Incentive Plans	Equity Incentive Plans On May 22, 2019, the Northfield Bancorp, Inc. 2019 Equity Incentive Plan (the “2019 EIP”) was approved by stockholders of the Company. Under the 2019 EIP, the maximum number of shares of stock that may be delivered to participants in the form of stock options, stock appreciation rights (“SARs”), restricted stock awards, or restricted stock units is 6,000,000 . To the extent an equity award is issued in the form of a restricted stock grant, or restricted stock unit, the number of stock options/SARs that can be granted is reduced by 4.5 . The maximum number of shares of stock that may be delivered to participants in the form of restricted stock awards and restricted stock units is 1,333,333 shares. Prior to May 22, 2019, the Company also maintained the Northfield Bancorp, Inc. 2014 Equity Incentive Plan (the “2014 EIP”). Upon approval of the 2019 EIP, the 2014 EIP was frozen and equity awards that would otherwise have been available for issuance are no longer available for grant. No stock options have been granted under 2019 EIP. The following table is a summary of the Company’s stock options outstanding as of March 31, 2020 , 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, 2019 2,227,193 $ 4.01 $ 13.93 4.96 Exercised (13,000 ) 3.93 13.38 4.35 Outstanding - March 31, 2020 2,214,193 4.01 13.94 4.71 Exercisable - March 31, 2020 2,033,272 3.99 13.84 4.66 Expected future stock option expense related to the non-vested options outstanding as of March 31, 2020 , is $155,000 over a weighted average period of 0.24 years. On February 17, 2020 , the Company granted to directors and employees, under the 2019 EIP, 83,744 restricted stock units with a total grant-date value of $1.3 million . Of these grants, 28,460 vest one year from the date of grant and 55,284 vest in equal installments over a five -year period beginning one year from the date of grant. The Company also issued 19,837 performance based restricted stock units to its executive officers with a total grant date fair-value of $313,623 . Vesting of the performance based restricted stock units will be measured on Core Return on Average Assets and will cliff-vest after a three -year measurement period ended December 31, 2022 , based on the Company's performance relative to a peer group as determined by the Compensation Committee of the Board. At the end of the performance period, the number of actual shares to be awarded may vary between 0% and 225% of target amounts. The following is a summary of the status of the Company’s restricted stock awards as of March 31, 2020 , and changes therein during the three months then ended. Number of Shares Awarded Weighted Average Grant Date Fair Value Non-vested at December 31, 2019 71,102 $ 15.36 Granted 103,581 15.81 Non-vested at March 31, 2020 174,683 15.63 Expected future stock award expense related to the non-vested restricted share awards as of March 31, 2020 , is $1.8 million over a weighted average period of 2.14 years. During the three months ended March 31, 2020 , and March 31, 2019 , the Company recorded $448,000 and $1.3 million

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2020
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, 2020 , and December 31, 2019 , by level within the fair value hierarchy as required by the Fair Value Measurements and Disclosures Topic of the 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 2019 Annual Report on Form 10-K. Fair Value Measurements at March 31, 2020 Using: Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Measured on a recurring basis: Assets: Investment securities: Debt securities available-for-sale: Mortgage-backed securities: Pass-through certificates: GSE $ 310,869 $ — $ 310,869 $ — REMICs: GSE 623,580 — 623,580 — Non-GSE 49 — 49 — 934,498 — 934,498 — Other debt securities Municipal bonds 279 — 279 — Corporate bonds 126,666 — 126,666 — 126,945 — 126,945 — Total debt securities available-for-sale 1,061,443 — 1,061,443 — Trading securities 8,388 8,388 — — Equity securities 374 374 — — Total $ 1,070,205 $ 8,762 $ 1,061,443 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 4,143 $ — $ — $ 4,143 Multifamily 22 — — 22 Home equity and lines of credit 29 — — 29 Total impaired real estate loans 4,194 — — 4,194 Commercial and industrial loans 14 — — 14 Total $ 4,208 $ — $ — $ 4,208 Fair Value Measurements at December 31, 2019 Using: Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Measured on a recurring basis: Assets: Investment securities: Debt securities available-for-sale: Mortgage-backed securities: Pass-through certificates: GSE $ 329,407 $ — $ 329,407 $ — REMICs: GSE 643,667 — 643,667 — Non-GSE 53 — 53 — 973,127 — 973,127 — Other debt securities Municipal bonds 299 — 299 — Corporate bonds 164,926 — 164,926 — 165,225 — 165,225 — Total debt securities available-for-sale 1,138,352 — 1,138,352 — Trading securities 11,222 11,222 — — Equity securities 250 250 — — Total $ 1,149,824 $ 11,472 $ 1,138,352 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 4,871 $ — $ — $ 4,871 Multifamily 26 — — 26 Home equity and lines of credit 30 — — 30 Total impaired real estate loans 4,927 — — 4,927 Commercial and industrial loans 15 — — 15 Total $ 4,942 $ — $ — $ 4,942 The following table presents qualitative information for Level 3 assets measured at fair value on a non-recurring basis at March 31, 2020 , and December 31, 2019 (dollars in thousands): Fair Value Valuation Methodology Unobservable Inputs Range of Inputs March 31, 2020 December 31, 2019 March 31, 2020 December 31, 2019 Impaired loans $ 4,208 $ 4,942 Appraisals Discount for costs to sell 7.0% 7.0% Discount for quick sale 10.0% 10.0% Discounted cash flows Interest rates 4.13% to 6.25% 4.13% to 6.25% 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, 2020 , and December 31, 2019 . 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, 2020 . 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, 2020 , and December 31, 2019 , the Company had impaired loans held-for-investment (excluding PCI loans) with outstanding principal balances of $6.7 million and $7.0 million , respectively, which were recorded at their estimated fair value of $4.2 million and $4.9 million , respectively. The Company recorded a net decrease in the specific reserve for impaired loans of $79,000 for the three months ended March 31, 2020 , and a net increase in the specific reserve for impaired loans of $94,000 for the three months ended March 31, 2019 . Net charge-offs of $90,000 and $70,000 were recorded for the three months ended March 31, 2020 , and March 31, 2019 , 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. 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) Borrowings 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. (k) Derivatives The fair value of the Company's derivatives is determined using discounted cash flow analysis using observable market-based inputs, which are considered Level 2 inputs. The estimated fair value of the Company’s financial instruments at March 31, 2020 , and December 31, 2019 , is presented in the following tables (in thousands): March 31, 2020 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 114,699 $ 114,699 $ — $ — $ 114,699 Trading securities 8,388 8,388 — — 8,388 Debt securities available-for-sale 1,061,443 — 1,061,443 — 1,061,443 Debt securities held-to-maturity 8,706 — 9,002 — 9,002 Equity securities (1) 374 374 — — 374 Federal Home Loan Bank of New York stock, at cost 29,855 — 29,855 — 29,855 Net loans held-for-investment 3,472,337 — — 3,479,488 3,479,488 Derivative assets 1,072 — 1,072 — 1,072 Financial liabilities: Deposits $ 3,485,546 $ — $ 3,495,318 $ — $ 3,495,318 Borrowed funds 716,357 — 733,159 — 733,159 Advance payments by borrowers for taxes and insurance 22,444 — 22,444 — 22,444 Derivative liabilities 1,075 — 1,075 — 1,075 December 31, 2019 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 147,818 $ 147,818 $ — $ — $ 147,818 Trading securities 11,222 11,222 — — 11,222 Debt securities available-for-sale 1,138,352 — 1,138,352 — 1,138,352 Debt securities held-to-maturity 8,762 — 8,886 — 8,886 Equity securities (1) 250 250 — 250 Federal Home Loan Bank of New York stock, at cost 39,575 — 39,575 — 39,575 Net loans held-for-investment 3,408,378 — — 3,482,804 3,482,804 Derivative assets 79 — 79 — 79 Financial liabilities: Deposits $ 3,408,233 $ — $ 3,412,414 $ — $ 3,412,414 Borrowed funds 857,004 — 862,980 — 862,980 Advance payments by borrowers for taxes and insurance 440,069 — 440,069 — 440,069 Derivative liabilities 79 — 79 — 79 (1) Excludes investments measured at net asset value in the amount of $3.1 million at both March 31, 2020 and December 31, 2019 , 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, 2020
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, 2020 2019 Net income available to common stockholders $ 4,551 $ 8,771 Weighted average shares outstanding-basic 46,791,768 46,940,903 Effect of non-vested restricted stock and stock options outstanding 191,698 347,257 Weighted average shares outstanding-diluted 46,983,466 47,288,160 Earnings per share-basic $ 0.10 $ 0.19 Earnings per share-diluted $ 0.10 $ 0.19 Anti-dilutive shares 1,001,828 1,075,747

Leases

Leases	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Leases	Leases Effective January 1, 2019, the Company adopted ASU No. 2016-02, Leases ( “ Topic 842 ” ) and all subsequent ASU's that modified Topic 842, as further explained in Note 12, Recent Accounting Pronouncements. The Company’s leases primarily relate to real estate property for branches and office space with terms extending from six months up to 35.25 years . At March 31, 2020 , all of the Company's leases are classified as operating leases. The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use assets and operating lease liabilities in the consolidated balance sheets. Right-of-use assets represent the right to use an underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. Operating lease right-of-use assets and liabilities are recorded at the present value of lease payments over the lease term. As the Company's leases do not provide an implicit rate, the Company uses its incremental borrowing rate in determining the present value of lease payments. Certain leases include options to renew, with one or more renewal terms ranging from five to ten years . As these extension options are not generally considered reasonably certain of renewal, they are not included in the lease term. At March 31, 2020 , the Company’s operating lease right-of-use assets and operating lease liabilities included in the consolidated balance sheet were $41.5 and $45.9 respectively. Operating lease expense is recognized on a straight-line basis over the lease term, while variable lease payments are recognized as incurred. Variable lease payments include common area maintenance charges, real estate taxes, repairs and maintenance costs and utilities. Operating and variable lease expenses are recorded in occupancy expense in the consolidated statements of income. Supplemental lease information at or for the three months ended March 31, 2020 , and March 31, 2019 is as follows (in thousands): Three Months Ended March 31, 2020 2019 Operating lease cost $ 1,439 $ 1,466 Variable lease cost 544 778 Net lease cost $ 1,983 $ 2,244 Cash paid for amounts included in measurement of operating lease liabilities $ 1,545 $ 1,327 Right-of-use assets obtained in exchange for new operating lease liabilities $ 3,028 $ 1,013 Weighted average remaining lease term 12.71 years 13.05 years Weighted average discount rate 3.59 % 3.60 % The following table summarizes lease payment obligations for each of the next five years and thereafter in addition to a reconcilement to the Company's current lease liability (dollars in thousands): Year Amount 2020 $ 4,719 2021 5,919 2022 5,311 2023 5,272 2024 4,935 Thereafter 33,230 Total lease payments 59,386 Less: imputed interest 13,454 Present value of lease liabilities $ 45,932 As of March 31, 2020

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition The Company records revenue from contracts with customers in accordance with ASU 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. Topic 606 does not apply to revenue associated with financial instruments, including revenue from loans and securities, which comprise the majority of the Company’s revenue. The Company’s revenue streams that are within the scope of Topic 606 include service charges on deposit accounts, ATM and card interchange fees, investment services fees, and other miscellaneous income. Fees and service charges for customer services include: (i) service charges on deposit accounts, including account maintenance fees, overdraft fees, insufficient funds fees, wire fees, and other deposit related fees; (ii) ATM and card interchange fees, which include fees generated when a Bank cardholder uses a non-Bank ATM or a non-Bank cardholder uses a Bank ATM, and fees earned whenever the Bank's debit cards are processed through card payment networks such as Visa; and (iii) investment services fees earned through partnering with a third party investment and brokerage service firm to provide insurance and investment products to customers. The Company's performance obligation for fees and service charges is satisfied and related revenue recognized immediately or in the month of performance of services. Other income primarily includes rental income from subleasing one of the Company's branches to a third party, which is recognized at the time the transaction occurs. The following table summarizes non-interest income for the periods indicated (dollars in thousands): Three Months Ended March 31, 2020 2019 Fees and service charges for customer services: Service charges $ 753 $ 782 ATM and card interchange fees 304 301 Investment fees 63 57 Total fees and service charges for customer services 1,120 1,140 Income on bank owned life insurance (1) 876 896 (Losses) gains on available-for-sale debt securities, net (1) (13 ) 155 (Losses) gains on trading securities, net (1) (1,992 ) 1,086 Swap income (1) 76 — Other 41 37 Total non-interest income $ 108 $ 3,314 (1) Not in scope of Topic 606

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives The Company has interest rate derivatives resulting from a service provided to certain qualified borrowers in a loan-related transaction and, therefore, are not used to manage interest rate risk in the Company’s assets or liabilities. The interest rate swap agreement which the Company executes with the commercial borrower is collateralized by the borrower’s commercial real estate financed by the Company. The collateral exceeds the maximum potential amount of future payments under the credit derivative. As these interest rate swaps do not meet the hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. During the fourth quarter of 2019, the Company entered into its first derivative transaction, and entered into a second transaction in the first quarter of 2020. At March 31, 2020 , the Company had two interest rate swaps with a notional amount of $15.9 million , and the fair value of the asset and liability derivative was $1.1 million . At December 31, 2019 , the Company had one interest rate swap with a notional amount of $12.0 million , and the fair value of the asset and liability derivative was $79,000 . For the three months ended March 31, 2020 , the Company recorded fee income of approximately $76,000

Recent Accounting Pronouncement

Recent Accounting Pronouncements Adopted	3 Months Ended
	Mar. 31, 2020
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements Adopted	Recent Accounting Pronouncements Adopted ASU No. 2018-15. In August 2018, the FASB issued ASU No. 2018-15, “Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract.” This guidance aligns the accounting for implementation costs related to a hosting arrangement that is a service contract with the guidance on capitalizing costs associated with developing or obtaining internal-use software. Specifically, where a cloud computing arrangement includes a license to internal-use software, the software license is accounted for by the customer in accordance with Subtopic 350-40, “Intangibles - Goodwill and Other-Internal-Use Software”. ASU No. 2018-15 is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. The Company adopted ASU No. 2018-15 on January 1, 2020 , and it did not have an impact on the Company's financial condition or results of operation. ASU No. 2018-13. In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU updates the disclosure requirements on Fair Value measurements by 1) removing: the disclosures for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for timing of transfers between levels, and the valuation processes for Level 3 fair value measurements; 2) modifying: disclosures for timing of liquidation of an investee’s assets and disclosures for uncertainty in measurement as of reporting date; and 3) adding: disclosures for changes in unrealized gains and losses included in other comprehensive income for recurring level 3 fair value measurements and disclosures for the range and weighted average of the significant unobservable inputs used to develop Level 3 fair value measurements. ASU No. 2018-13 is effective for fiscal years beginning after December 15, 2019. With the exception of the following, which should be applied prospectively, disclosures relating to changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the disclosures for uncertainty measurement, all other changes should be applied retrospectively to all periods presented upon the effective date. The Company adopted ASU No. 2018-13 on January 1, 2020 , and it did not have an impact on the Company's financial condition or results of operation. 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 eliminates Step 2 from the goodwill impairment test and also eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The ASU is effective for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The Company adopted ASU No. 2017-04 on January 1, 2020 , and it did not have an impact on the Company's financial condition or results of operation. During the three months ended March 31, 2020, the Company qualitatively assessed the current economic environment, including the estimated impact of the COVID-19 pandemic on macroeconomic variables and economic forecasts, and on the Company's stock price which has experienced a recent decline in value, and how these might impact the fair value of its reporting unit. After consideration of the items above, the first quarter 2020 results, as well as the results of the annual 2019 impairment test which resulted in an excess of reporting unit fair value over book value of approximately 27% , the Company determined that it was more-likely-than-not that the fair value of its reporting unit was above its book value as of March 31, 2020. For additional information regarding the Company's goodwill impairment testing process, see Note 1 to the consolidated financial statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2019 .

Subsequent Event

Subsequent Event	3 Months Ended
	Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event The Company has elected to participate in the Paycheck Protection Program (PPP) authorized by the CARES Act, and administered by the Small Business Administration, which provides 100% federally guaranteed loans for small businesses to cover payroll, utilities, rent and interest. These small business loans may be forgiven if borrowers maintain their payrolls and satisfy certain other conditions for a period of time during the COVID-19 pandemic. As of May 7, 2020 , The Company had approvals for over 750 loans, totaling approximately $102.9 million , and benefiting small businesses with over 10,000 employees. PPP provides for lender processing fees that range from 1% to 5% of the final disbursement made to individual borrowers. Based on the Company’s approved disbursements as of May 7, 2020 , we estimate our loan processing fees would be approximately $3.7 million . As of May 7, 2020 , the Company had approved 197 loan modifications with payment deferrals on outstanding loan balances of $321.3 million in connection with the COVID-19 relief provided by the CARES Act. Of these 197 payment deferrals, 63 were principal deferrals totaling $135.1 million , and 134 were principal and interest deferrals totaling $186.2 million . These deferrals were generally no longer than three months in duration and were not considered TDRs based on interagency guidance issued in March 2020. Loans in deferment status (“COVID-19 Modified Loans”) will continue to accrue interest during the deferment period unless otherwise classified as nonperforming. COVID-19 Modified Loans are required to make escrow payments for real estate taxes and insurance, if applicable. For loans given relief of interest, the deferred interest is generally to be paid back over a period not to exceed 18 months. Principal deferrals may be brought current or recast into outstanding principal at time of rate reset or repaid at the end of the loan's contractual term. COVID-19 Modified Loan agreements generally also include covenants that prohibit distributions, bonuses, or payments of management fees to related entities until all deferred payments are made. In addition, the Company has received 139 requests, or had inquiries about relief, totaling $143.5 million , for COVID-19 payment relief. The Company is in the process of evaluating these requests. As of May 7, 2020 , COVID-19 Modified Loans and requests for COVID-19 payment relief (excluding PCI loans) totaled approximately 13.3% of total loans.

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
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, collectively (the “ Company ” ). 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 statements of 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, 2020 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2020 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, estimated cash flows of our purchased credit-impaired (“PCI”) loans and the valuation allowance against deferred tax assets. 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 Company's Annual Report on Form 10-K for the year ended December 31, 2019
Fair Value Measurements	The following tables present the assets reported on the consolidated balance sheets at their estimated fair value as of March 31, 2020 , and December 31, 2019 , by level within the fair value hierarchy as required by the Fair Value Measurements and Disclosures Topic of the 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	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) Borrowings 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	Recent Accounting Pronouncements Adopted ASU No. 2018-15. In August 2018, the FASB issued ASU No. 2018-15, “Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract.” This guidance aligns the accounting for implementation costs related to a hosting arrangement that is a service contract with the guidance on capitalizing costs associated with developing or obtaining internal-use software. Specifically, where a cloud computing arrangement includes a license to internal-use software, the software license is accounted for by the customer in accordance with Subtopic 350-40, “Intangibles - Goodwill and Other-Internal-Use Software”. ASU No. 2018-15 is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. The Company adopted ASU No. 2018-15 on January 1, 2020 , and it did not have an impact on the Company's financial condition or results of operation. ASU No. 2018-13. In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU updates the disclosure requirements on Fair Value measurements by 1) removing: the disclosures for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for timing of transfers between levels, and the valuation processes for Level 3 fair value measurements; 2) modifying: disclosures for timing of liquidation of an investee’s assets and disclosures for uncertainty in measurement as of reporting date; and 3) adding: disclosures for changes in unrealized gains and losses included in other comprehensive income for recurring level 3 fair value measurements and disclosures for the range and weighted average of the significant unobservable inputs used to develop Level 3 fair value measurements. ASU No. 2018-13 is effective for fiscal years beginning after December 15, 2019. With the exception of the following, which should be applied prospectively, disclosures relating to changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the disclosures for uncertainty measurement, all other changes should be applied retrospectively to all periods presented upon the effective date. The Company adopted ASU No. 2018-13 on January 1, 2020 , and it did not have an impact on the Company's financial condition or results of operation. 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 eliminates Step 2 from the goodwill impairment test and also eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The ASU is effective for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The Company adopted ASU No. 2017-04 on January 1, 2020 , and it did not have an impact on the Company's financial condition or results of operation. During the three months ended March 31, 2020, the Company qualitatively assessed the current economic environment, including the estimated impact of the COVID-19 pandemic on macroeconomic variables and economic forecasts, and on the Company's stock price which has experienced a recent decline in value, and how these might impact the fair value of its reporting unit. After consideration of the items above, the first quarter 2020 results, as well as the results of the annual 2019 impairment test which resulted in an excess of reporting unit fair value over book value of approximately 27% , the Company determined that it was more-likely-than-not that the fair value of its reporting unit was above its book value as of March 31, 2020. For additional information regarding the Company's goodwill impairment testing process, see Note 1 to the consolidated financial statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2019 .

Debt Securities Available-for_2

Debt Securities Available-for-Sale (Tables)	3 Months Ended
	Mar. 31, 2020
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, 2020 , and December 31, 2019 (in thousands): March 31, 2020 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises (GSE) $ 300,610 $ 10,340 $ 81 $ 310,869 Real estate mortgage investment conduits (REMICs): GSE 618,156 6,336 912 623,580 Non-GSE 51 — 2 49 918,817 16,676 995 934,498 Other debt securities: Municipal bonds 278 1 — 279 Corporate bonds 127,643 419 1,396 126,666 127,921 420 1,396 126,945 Total debt securities available-for-sale $ 1,046,738 $ 17,096 $ 2,391 $ 1,061,443 December 31, 2019 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value Mortgage-backed securities: Pass-through certificates: GSE $ 324,080 $ 6,081 $ 754 $ 329,407 REMICs: GSE 643,816 2,076 2,225 643,667 Non-GSE 53 — — 53 967,949 8,157 2,979 973,127 Other debt securities: Municipal bonds 296 3 — 299 Corporate bonds 163,725 1,214 13 164,926 164,021 1,217 13 165,225 Total debt securities available-for-sale $ 1,131,970 $ 9,374 $ 2,992 $ 1,138,352
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, 2020 (in thousands): Available-for-sale Amortized cost Estimated fair value Due in one year or less $ 77,203 $ 76,941 Due after one year through five years 50,718 50,004 $ 127,921 $ 126,945
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, 2020 , and December 31, 2019 , were as follows (in thousands): March 31, 2020 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 $ 4 $ 109 $ 77 $ 634 $ 81 $ 743 REMICs: GSE 665 135,392 247 24,351 912 159,743 Non-GSE — — 2 49 2 49 Other debt securities: Corporate bonds 1,396 57,948 — — 1,396 57,948 Total $ 2,065 $ 193,449 $ 326 $ 25,034 $ 2,391 $ 218,483 December 31, 2019 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 $ 25 $ 3,404 $ 729 $ 55,184 $ 754 $ 58,588 REMICs: GSE 950 197,634 1,275 54,555 2,225 252,189 Non-GSE — — — 53 — 53 Other debt securities: Corporate bonds — — 13 15,586 13 15,586 Total $ 975 $ 201,038 $ 2,017 $ 125,378 $ 2,992 $ 326,416

Debt Securities Held-to-Matur_2

Debt Securities Held-to-Maturity (Tables)	3 Months Ended
	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Securities Held-to-Maturity	The following is a summary of debt securities held-to-maturity at March 31, 2020 , and December 31, 2019 (in thousands): March 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 8,706 $ 296 $ — $ 9,002 Total securities held-to-maturity $ 8,706 $ 296 $ — $ 9,002 December 31, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSEs $ 8,762 $ 129 $ 5 $ 8,886 Total securities held-to-maturity $ 8,762 $ 129 $ 5 $ 8,886
Held-to-maturity Securities	Gross unrealized losses on mortgage-backed securities held-to-maturity, and the estimated fair value of the related securities, aggregated by security category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2019 , were as follows (in thousands): December 31, 2019 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 $ — $ — $ 5 $ 378 $ 5 $ 378 Total securities held-to-maturity $ — $ — $ 5 $ 378 $ 5 $ 378

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2020
Receivables [Abstract]
Net Loans Held-for-Investment	Net loans held-for-investment are as follows (in thousands): March 31, December 31, 2020 2019 Real estate loans: Multifamily $ 2,300,974 $ 2,196,407 Commercial mortgage 527,498 528,681 One-to-four family residential mortgage 84,880 83,742 Home equity and lines of credit 87,391 84,928 Construction and land 39,922 38,284 Total real estate loans 3,040,665 2,932,042 Commercial and industrial loans 49,210 45,328 Other loans 1,205 2,083 Total commercial and industrial and other loans 50,415 47,411 Deferred loan cost, net 7,680 7,614 Originated loans held-for-investment, net 3,098,760 2,987,067 PCI Loans 16,886 17,365 Loans acquired: One-to-four family residential mortgage 167,934 187,975 Multifamily 102,176 108,417 Commercial mortgage 102,284 113,027 Home equity and lines of credit 10,653 12,008 Construction and land 1,388 2,537 Total acquired real estate loans 384,435 423,964 Commercial and industrial loans 9,056 8,689 Total loans acquired, net 393,491 432,653 Loans held-for-investment, net 3,509,137 3,437,085 Allowance for loan losses (36,800 ) (28,707 ) Net loans held-for-investment $ 3,472,337 $ 3,408,378
Summary of Accretable Yield	The following table details the accretion of interest income for PCI loans for the three months ended March 31, 2020 and March 31, 2019 (in thousands): At or for the three months ended March 31, 2020 2019 Balance at the beginning of period $ 17,086 $ 21,846 Accretion into interest income (803 ) (1,049 ) Balance at end of period $ 16,283 $ 20,797
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, 2020 , and March 31, 2019 (in thousands): Three Months Ended March 31, 2020 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: Beginning balance $ 4,756 $ 180 $ 536 $ 20,203 $ 317 $ 1,640 $ 151 $ 27,783 $ 789 $ 135 $ 28,707 Charge-offs — — — — — (37 ) — (37 ) — (433 ) (470 ) Recoveries 370 — — — — 2 — 372 — 8 380 Provisions (credit) 263 132 135 6,686 257 430 (65 ) 7,838 — 345 8,183 Ending balance $ 5,389 $ 312 $ 671 $ 26,889 $ 574 $ 2,035 $ 86 $ 35,956 $ 789 $ 55 $ 36,800 Three Months Ended March 31, 2019 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: Beginning balance $ 5,630 $ 342 $ 463 $ 18,084 $ 291 $ 1,569 $ 108 $ 26,487 $ 1,010 $ — $ 27,497 Charge-offs (6 ) — — — — (26 ) — (32 ) — (60 ) (92 ) Recoveries 13 — — — — — — 13 — 9 22 Provisions (credit) (255 ) 28 111 262 45 (167 ) (16 ) 8 — 51 59 Ending balance $ 5,382 $ 370 $ 574 $ 18,346 $ 336 $ 1,376 $ 92 $ 26,476 $ 1,010 $ — $ 27,486 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, 2020 , and December 31, 2019 (in thousands): March 31, 2020 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 $ — $ — $ — $ — $ 3 $ 4 $ — $ 7 $ — $ 55 $ 62 Ending balance: collectively evaluated for impairment $ 5,389 $ 312 $ 671 $ 26,889 $ 571 $ 2,031 $ 86 $ 35,949 $ 789 $ — $ 36,738 Loans, net: Ending balance $ 528,104 $ 86,404 $ 39,953 $ 2,304,387 $ 89,349 $ 49,358 $ 1,205 $ 3,098,760 $ 16,886 $ 393,491 $ 3,509,137 Ending balance: individually evaluated for impairment $ 11,815 $ 1,816 $ — $ 994 $ 53 $ 55 $ — $ 14,733 $ — $ 5,784 $ 20,517 Ending balance: collectively evaluated for impairment $ 516,289 $ 84,588 $ 39,953 $ 2,303,393 $ 89,296 $ 49,303 $ 1,205 $ 3,084,027 $ 16,886 $ 387,707 $ 3,488,620 December 31, 2019 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 $ — $ — $ — $ — $ 3 $ 4 $ — $ 7 $ — $ 135 $ 142 Ending balance: collectively evaluated for impairment $ 4,756 $ 180 $ 536 $ 20,203 $ 314 $ 1,636 $ 151 $ 27,776 $ 789 $ — $ 28,565 Loans, net: Ending balance $ 529,287 $ 85,355 $ 38,303 $ 2,199,734 $ 86,848 $ 45,456 $ 2,084 $ 2,987,067 $ 17,365 $ 432,653 $ 3,437,085 Ending balance: individually evaluated for impairment $ 13,226 $ 1,841 $ — $ 997 $ 55 $ 58 $ — $ 16,177 $ — $ 4,780 $ 20,957 Ending balance: collectively evaluated for impairment $ 516,061 $ 83,514 $ 38,303 $ 2,198,737 $ 86,793 $ 45,398 $ 2,084 $ 2,970,890 $ 17,365 $ 427,873 $ 3,416,128
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, 2020 , and December 31, 2019 (in thousands): At March 31, 2020 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 $ 247,304 $ 2,051,039 $ 89,069 $ 432,711 $ 53,091 $ 30,953 $ 39,953 $ 89,082 $ 49,055 $ 1,205 $ 3,083,462 Special Mention 291 292 — — 770 — — 80 266 — 1,699 Substandard 298 5,163 — 6,324 1,563 27 — 187 37 — 13,599 Originated loans held-for-investment, net $ 247,893 $ 2,056,494 $ 89,069 $ 439,035 $ 55,424 $ 30,980 $ 39,953 $ 89,349 $ 49,358 $ 1,205 $ 3,098,760 At December 31, 2019 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 $ 232,950 $ 1,960,984 $ 79,485 $ 440,065 $ 52,886 $ 29,967 $ 38,303 $ 86,547 $ 45,075 $ 2,084 $ 2,968,346 Special Mention — 296 370 1,092 777 — — 14 301 — 2,850 Substandard 301 5,203 — 8,275 1,397 328 — 287 80 — 15,871 Originated loans held-for-investment, net $ 233,251 $ 1,966,483 $ 79,855 $ 449,432 $ 55,060 $ 30,295 $ 38,303 $ 86,848 $ 45,456 $ 2,084 $ 2,987,067
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, 2020 , and December 31, 2019 , excluding PCI loans which have been segregated into pools. For PCI loans, each loan pool is accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows (in thousands): March 31, 2020 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 $ — $ — $ 1,108 $ 1,108 — $ 1,108 Total commercial — — 1,108 1,108 — 1,108 One-to-four family residential LTV < 60% Special Mention — — — — 173 173 Substandard 221 187 77 485 — 485 Total 221 187 77 485 173 658 LTV => 60% Substandard — 27 — 27 — 27 Total one-to-four family residential 221 214 77 512 173 685 Multifamily LTV => 35% Special Mention — — — — 291 291 Total multifamily — — — — 291 291 Home equity and lines of credit Substandard — 66 89 155 — 155 Total home equity and lines of credit — 66 89 155 — 155 Total non-performing loans held-for-investment, originated 221 280 1,274 1,775 464 2,239 Loans acquired: Real estate loans: Commercial LTV < 35% Substandard — 79 187 266 66 332 LTV => 35% Substandard 2,815 1,255 1,831 5,901 120 6,021 Total commercial 2,815 1,334 2,018 6,167 186 6,353 One-to-four family residential LTV < 60% Substandard — 189 85 274 6 280 LTV => 60% Substandard — — 93 93 — 93 Total one-to-four family residential — 189 178 367 6 373 Multifamily LTV < 35% Substandard 40 — — 40 — 40 LTV => 35% Substandard — 394 — 394 — 394 Total multifamily 40 394 — 434 — 434 Home equity and lines of credit - Substandard — — 28 28 — 28 Total non-performing loans acquired 2,855 1,917 2,224 6,996 192 7,188 Total non-performing loans $ 3,076 $ 2,197 $ 3,498 $ 8,771 $ 656 $ 9,427 December 31, 2019 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 $ 2,416 $ 2,416 $ 2,416 Total commercial — — 2,416 2,416 — 2,416 One-to-four family residential LTV < 60% Substandard — — 493 493 114 607 LTV => 60% Substandard — 29 — 29 — 29 Total one-to-four family residential — 29 493 522 114 636 Home equity and lines of credit Substandard — 67 89 156 — 156 Total home equity and lines of credit — 67 89 156 — 156 Total non-performing loans held-for-investment, originated — 96 2,998 3,094 114 3,208 Loans acquired: Real estate loans: Commercial LTV < 35% Substandard 79 — 188 267 66 333 LTV => 35% Substandard 3,530 — 1,709 5,239 187 5,426 Total commercial 3,609 — 1,897 5,506 253 5,759 One-to-four family residential LTV < 60% Substandard 190 — 85 275 151 426 LTV => 60% Substandard — — 93 93 — 93 Total one-to-four family residential 190 — 178 368 151 519 Multifamily LTV < 35% Substandard 40 — — 40 — 40 LTV => 35% Substandard — 397 — 397 — 397 Total multifamily 40 397 — 437 — 437 Home equity and lines of credit Substandard — — 28 28 — 28 Total home equity and lines of credit — — 28 28 — 28 Total non-performing loans acquired 3,839 397 2,103 6,339 404 6,743 Total non-performing loans $ 3,839 $ 493 $ 5,101 $ 9,433 $ 518 $ 9,951
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, 2020 , and December 31, 2019 (in thousands): March 31, 2020 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 $ 88,944 $ 125 $ 89,069 $ — $ 89,069 Total 88,944 125 89,069 — 89,069 LTV => 35% Pass 431,886 825 432,711 — 432,711 Substandard 248 4,968 5,216 1,108 6,324 Total 432,134 5,793 437,927 1,108 439,035 Total commercial 521,078 5,918 526,996 1,108 528,104 One-to-four family residential LTV < 60% Pass 53,067 22 53,089 — 53,089 Special Mention — 597 597 173 770 Substandard 1,079 — 1,079 485 1,564 Total 54,146 619 54,765 658 55,423 LTV => 60% Pass 29,106 1,848 30,954 — 30,954 Substandard — — — 27 27 Total 29,106 1,848 30,954 27 30,981 Total one-to-four family residential 83,252 2,467 85,719 685 86,404 Construction and land Pass 39,953 — 39,953 — 39,953 Total construction and land 39,953 — 39,953 — 39,953 Multifamily LTV < 35% Pass 247,304 — 247,304 — 247,304 Special Mention — — — 291 291 Substandard 298 — 298 — 298 Total 247,602 — 247,602 291 247,893 LTV => 35% Pass 2,051,038 — 2,051,038 — 2,051,038 Special Mention 292 — 292 — 292 Substandard 4,192 972 5,164 — 5,164 Total 2,055,522 972 2,056,494 — 2,056,494 Total multifamily 2,303,124 972 2,304,096 291 2,304,387 Home equity and lines of credit Pass 88,846 236 89,082 — 89,082 Special Mention 80 — 80 — 80 Substandard 32 — 32 155 187 Total home equity and lines of credit 88,958 236 89,194 155 89,349 Commercial and industrial Pass 48,689 366 49,055 — 49,055 Special Mention 266 — 266 — 266 Substandard — 37 37 — 37 Total commercial and industrial 48,955 403 49,358 — 49,358 March 31, 2020 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 1,205 — 1,205 1,205 Total originated loans held-for-investment 3,086,525 9,996 3,096,521 2,239 3,098,760 Acquired loans: Real estate loans: One-to-four family residential LTV < 60% Pass 152,130 1,279 153,409 — 153,409 Special Mention — 381 381 — 381 Substandard — — — 279 279 Total 152,130 1,660 153,790 279 154,069 LTV => 60% Pass 13,772 — 13,772 — 13,772 Substandard — — — 93 93 Total 13,772 — 13,772 93 13,865 Total one-to-four family residential 165,902 1,660 167,562 372 167,934 Commercial LTV < 35% Pass 34,004 315 34,319 — 34,319 Special Mention 994 95 1,089 — 1,089 Substandard 538 — 538 332 870 Total 35,536 410 35,946 332 36,278 LTV => 35% Pass 51,245 — 51,245 — 51,245 Special Mention 134 341 475 — 475 Substandard 6,783 1,482 8,265 6,021 14,286 Total 58,162 1,823 59,985 6,021 66,006 Total commercial 93,698 2,233 95,931 6,353 102,284 Construction and land Pass 1,388 — 1,388 — 1,388 Total construction and land 1,388 — 1,388 — 1,388 Multifamily LTV < 35% Pass 99,144 — 99,144 — 99,144 Substandard — — — 40 40 Total 99,144 — 99,144 40 99,184 LTV => 35% Pass 2,597 — 2,597 — 2,597 Substandard — — — 395 395 Total 2,597 — 2,597 395 2,992 Total multifamily 101,741 — 101,741 435 102,176 Home equity and lines of credit Pass 10,437 104 10,541 — 10,541 Substandard 84 — 84 28 112 Total home equity and lines of credit 10,521 104 10,625 28 10,653 Commercial and industrial Pass 9,056 — 9,056 — 9,056 Total commercial and industrial 9,056 — 9,056 — 9,056 Other loans - Pass — — — — — Total loans acquired 382,306 3,997 386,303 7,188 393,491 $ 3,468,831 $ 13,993 $ 3,482,824 $ 9,427 $ 3,492,251 December 31, 2019 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 $ 79,383 $ 102 $ 79,485 — $ 79,485 Special Mention 370 — 370 — 370 Total 79,753 102 79,855 — 79,855 LTV => 35% Pass 439,253 812 440,065 — 440,065 Special Mention 1,092 — 1,092 — 1,092 Substandard 5,228 631 5,859 2,416 8,275 Total 445,573 1,443 447,016 2,416 449,432 Total commercial 525,326 1,545 526,871 2,416 529,287 One-to-four family residential LTV < 60% Pass 52,757 129 52,886 — 52,886 Special Mention — 777 777 — 777 Substandard 790 — 790 607 1,397 Total 53,547 906 54,453 607 55,060 LTV => 60% Pass 29,741 226 29,967 — 29,967 Substandard 299 — 299 29 328 Total 30,040 226 30,266 29 30,295 Total one-to-four family residential 83,587 1,132 84,719 636 85,355 Construction and land Pass 38,156 147 38,303 — 38,303 Total construction and land 38,156 147 38,303 — 38,303 Multifamily LTV < 35% Pass 232,658 292 232,950 — 232,950 Substandard 301 — 301 — 301 Total 232,959 292 233,251 — 233,251 LTV => 35% Pass 1,960,729 255 1,960,984 — 1,960,984 Special Mention 296 — 296 — 296 Substandard 5,203 — 5,203 — 5,203 Total 1,966,228 255 1,966,483 — 1,966,483 Total multifamily 2,199,187 547 2,199,734 — 2,199,734 Home equity and lines of credit Pass 86,380 167 86,547 — 86,547 Special Mention 14 — 14 — 14 Substandard 131 — 131 156 287 Total home equity and lines of credit 86,525 167 86,692 156 86,848 Commercial and industrial loans Pass 44,886 189 45,075 — 45,075 Special Mention 301 — 301 — 301 Substandard 80 — 80 — 80 Total commercial and industrial loans 45,267 189 45,456 — 45,456 Other loans - Pass 2,058 26 2,084 — 2,084 Total originated loans held-for-investment 2,980,106 3,753 2,983,859 3,208 2,987,067 December 31, 2019 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 172,882 73 172,955 — 172,955 Special Mention — 385 385 — 385 Substandard — — — 426 426 Total 172,882 458 173,340 426 173,766 LTV => 60% Pass 14,116 — 14,116 — 14,116 Substandard — — — 93 93 Total 14,116 — 14,116 93 14,209 Total one-to-four family residential 186,998 458 187,456 519 187,975 Commercial LTV < 35% Pass 35,173 287 35,460 — 35,460 Special Mention 994 194 1,188 — 1,188 Substandard 369 — 369 334 703 Total 36,536 481 37,017 334 37,351 LTV => 35% Pass 60,311 — 60,311 — 60,311 Special Mention 134 464 598 — 598 Substandard 6,382 2,960 9,342 5,425 14,767 Total 66,827 3,424 70,251 5,425 75,676 Total commercial 103,363 3,905 107,268 5,759 113,027 Construction and land Pass 2,537 — 2,537 — 2,537 Total construction and land 2,537 — 2,537 — 2,537 Multifamily LTV < 35% Pass 105,327 — 105,327 — 105,327 Substandard — — — 40 40 Total 105,327 — 105,327 40 105,367 LTV => 35% Pass 2,653 — 2,653 — 2,653 Substandard — — — 397 397 Total 2,653 — 2,653 397 3,050 Total multifamily 107,980 — 107,980 437 108,417 Home equity and lines of credit Pass 11,842 50 11,892 — 11,892 Substandard 88 — 88 28 116 Total home equity and lines of credit 11,930 50 11,980 28 12,008 Commercial and industrial loans Pass 8,649 40 8,689 — 8,689 Total commercial and industrial loans 8,649 40 8,689 — 8,689 Other — — — — — Total loans acquired 421,457 4,453 425,910 6,743 432,653 $ 3,401,563 $ 8,206 $ 3,409,769 $ 9,951 $ 3,419,720
Summary of Impaired Loans	The following table summarizes originated and acquired impaired loans as of March 31, 2020 , and December 31, 2019 (in thousands): March 31, 2020 December 31, 2019 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance Related Allowance With No Allowance Recorded: Real estate loans: Commercial LTV < 35% Substandard $ — $ 139 $ — $ — $ 139 $ — LTV => 35% Pass 5,491 6,378 — 5,582 6,468 — Substandard 10,883 11,089 — 10,438 11,002 — One-to-four family residential LTV < 60% Pass 1,363 1,449 — 1,379 1,463 — Special Mention 382 382 — 385 385 — Substandard 556 556 — 564 564 — LTV => 60% Pass 120 154 — 122 154 — Substandard 27 27 — 29 29 — Multifamily LTV < 35% Substandard 40 40 — 40 40 — LTV => 35% Pass 22 493 — 26 496 — Substandard 972 972 — 972 972 — Home equity and lines of credit Pass 20 20 — 22 22 — Commercial and industrial loans Substandard 37 37 — 39 39 — With a Related Allowance Recorded: Real estate loans: Commercial LTV => 35% Substandard 553 1,419 (55 ) 1,307 1,307 (135 ) One-to-four family residential LTV < 60% Substandard — — — — — — Home equity and lines of credit Substandard 33 32 (3 ) 33 33 (3 ) Commercial and industrial loans Special Mention 18 18 (4 ) 19 19 (4 ) Total: Real estate loans Commercial 16,927 19,025 (55 ) 17,327 18,916 (135 ) One-to-four family residential 2,448 2,568 — 2,479 2,595 — Multifamily 1,034 1,505 — 1,038 1,508 — Home equity and lines of credit 53 52 (3 ) 55 55 (3 ) Commercial and industrial loans 55 55 (4 ) 58 58 (4 ) $ 20,517 $ 23,205 $ (62 ) $ 20,957 $ 23,132 $ (142 ) 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 and three months ended March 31, 2020 , and March 31, 2019 (in thousands): Three Months Ended March 31, 2020 March 31, 2019 Average Recorded Investment Interest Income Average Recorded Investment Interest Income With No Allowance Recorded: Real estate loans: Commercial LTV => 35% Pass $ 5,537 $ 75 $ 5,888 $ 78 Substandard 10,661 37 11,604 72 One-to-four family residential LTV < 60% Pass 1,371 16 1,677 22 Special Mention 384 5 — — Substandard 560 11 240 3 LTV => 60% Pass 121 1 128 1 Substandard 28 — 125 3 Multifamily LTV < 35% Substandard 40 — 100 1 LTV => 35% Pass 24 4 37 4 Substandard 972 9 1,227 20 Home equity and lines of credit Pass 21 — 27 — Commercial and industrial loans Substandard 38 — 50 — With a Related Allowance Recorded: Real estate loans: Commercial LTV => 35% Substandard 930 — 259 — One-to-four family residential LTV < 60% Substandard — — 502 5 Home equity and lines of credit Substandard 33 1 33 1 Commercial and industrial loans Special Mention 18 — 21 — Total: Real estate loans Commercial 17,128 112 17,751 150 One-to-four family residential 2,464 33 2,672 34 Multifamily 1,036 13 1,364 25 Home equity and lines of credit 54 1 60 1 Commercial and industrial loans 56 — 71 — $ 20,738 $ 159 $ 21,918 $ 210
Troubled Debt Restructurings on Financing Receivables	The following table summarizes loans that were modified in a TDR during the three months ended March 31, 2019: Three Months Ended March 31, 2019 Number of Relationships Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) (in thousands) Troubled Debt Restructurings Consumer 1 $ 2 $ 2 Commercial real estate 1 2,834 2,834 Total Troubled Debt Restructurings 2 $ 2,836 $ 2,836 (1) Amounts are at time of modification

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2020
Banking and Thrift [Abstract]
Deposit Account Balances	Deposits account balances are summarized as follows (in thousands): March 31, 2020 December 31, 2019 Non-interest-bearing checking $ 394,836 $ 387,409 Negotiable orders of withdrawal (NOW) and interest-bearing checking 605,652 573,927 Savings and money market 1,385,593 1,398,345 Certificates of deposit 1,099,465 1,048,552 Total deposits $ 3,485,546 $ 3,408,233
Interest Expense on Deposits	Interest expense on deposit accounts is summarized for the periods indicated (in thousands): Three Months Ended March 31, 2020 2019 NOW and interest-bearing checking, savings, and money market $ 4,073 $ 4,794 Certificates of deposit 5,206 5,453 Total interest expense on deposit accounts $ 9,279 $ 10,247

Equity Incentive Plans (Tables)

Equity Incentive Plans (Tables)	3 Months Ended
	Mar. 31, 2020
Share-based Payment Arrangement [Abstract]
Stock Options Outstanding	The following table is a summary of the Company’s stock options outstanding as of March 31, 2020 , 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, 2019 2,227,193 $ 4.01 $ 13.93 4.96 Exercised (13,000 ) 3.93 13.38 4.35 Outstanding - March 31, 2020 2,214,193 4.01 13.94 4.71 Exercisable - March 31, 2020 2,033,272 3.99 13.84 4.66
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, 2020 , and changes therein during the three months then ended. Number of Shares Awarded Weighted Average Grant Date Fair Value Non-vested at December 31, 2019 71,102 $ 15.36 Granted 103,581 15.81 Non-vested at March 31, 2020 174,683 15.63

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Significant Fair Value of Assets and Liabilities Measured on Recurring and Non Recurring Basis	Fair Value Measurements at March 31, 2020 Using: Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Measured on a recurring basis: Assets: Investment securities: Debt securities available-for-sale: Mortgage-backed securities: Pass-through certificates: GSE $ 310,869 $ — $ 310,869 $ — REMICs: GSE 623,580 — 623,580 — Non-GSE 49 — 49 — 934,498 — 934,498 — Other debt securities Municipal bonds 279 — 279 — Corporate bonds 126,666 — 126,666 — 126,945 — 126,945 — Total debt securities available-for-sale 1,061,443 — 1,061,443 — Trading securities 8,388 8,388 — — Equity securities 374 374 — — Total $ 1,070,205 $ 8,762 $ 1,061,443 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 4,143 $ — $ — $ 4,143 Multifamily 22 — — 22 Home equity and lines of credit 29 — — 29 Total impaired real estate loans 4,194 — — 4,194 Commercial and industrial loans 14 — — 14 Total $ 4,208 $ — $ — $ 4,208 Fair Value Measurements at December 31, 2019 Using: Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Measured on a recurring basis: Assets: Investment securities: Debt securities available-for-sale: Mortgage-backed securities: Pass-through certificates: GSE $ 329,407 $ — $ 329,407 $ — REMICs: GSE 643,667 — 643,667 — Non-GSE 53 — 53 — 973,127 — 973,127 — Other debt securities Municipal bonds 299 — 299 — Corporate bonds 164,926 — 164,926 — 165,225 — 165,225 — Total debt securities available-for-sale 1,138,352 — 1,138,352 — Trading securities 11,222 11,222 — — Equity securities 250 250 — — Total $ 1,149,824 $ 11,472 $ 1,138,352 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 4,871 $ — $ — $ 4,871 Multifamily 26 — — 26 Home equity and lines of credit 30 — — 30 Total impaired real estate loans 4,927 — — 4,927 Commercial and industrial loans 15 — — 15 Total $ 4,942 $ — $ — $ 4,942
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, 2020 , and December 31, 2019 (dollars in thousands): Fair Value Valuation Methodology Unobservable Inputs Range of Inputs March 31, 2020 December 31, 2019 March 31, 2020 December 31, 2019 Impaired loans $ 4,208 $ 4,942 Appraisals Discount for costs to sell 7.0% 7.0% Discount for quick sale 10.0% 10.0% Discounted cash flows Interest rates 4.13% to 6.25% 4.13% to 6.25%
Estimated Fair Values of Significant Financial Instruments	The estimated fair value of the Company’s financial instruments at March 31, 2020 , and December 31, 2019 , is presented in the following tables (in thousands): March 31, 2020 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 114,699 $ 114,699 $ — $ — $ 114,699 Trading securities 8,388 8,388 — — 8,388 Debt securities available-for-sale 1,061,443 — 1,061,443 — 1,061,443 Debt securities held-to-maturity 8,706 — 9,002 — 9,002 Equity securities (1) 374 374 — — 374 Federal Home Loan Bank of New York stock, at cost 29,855 — 29,855 — 29,855 Net loans held-for-investment 3,472,337 — — 3,479,488 3,479,488 Derivative assets 1,072 — 1,072 — 1,072 Financial liabilities: Deposits $ 3,485,546 $ — $ 3,495,318 $ — $ 3,495,318 Borrowed funds 716,357 — 733,159 — 733,159 Advance payments by borrowers for taxes and insurance 22,444 — 22,444 — 22,444 Derivative liabilities 1,075 — 1,075 — 1,075 December 31, 2019 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 147,818 $ 147,818 $ — $ — $ 147,818 Trading securities 11,222 11,222 — — 11,222 Debt securities available-for-sale 1,138,352 — 1,138,352 — 1,138,352 Debt securities held-to-maturity 8,762 — 8,886 — 8,886 Equity securities (1) 250 250 — 250 Federal Home Loan Bank of New York stock, at cost 39,575 — 39,575 — 39,575 Net loans held-for-investment 3,408,378 — — 3,482,804 3,482,804 Derivative assets 79 — 79 — 79 Financial liabilities: Deposits $ 3,408,233 $ — $ 3,412,414 $ — $ 3,412,414 Borrowed funds 857,004 — 862,980 — 862,980 Advance payments by borrowers for taxes and insurance 440,069 — 440,069 — 440,069 Derivative liabilities 79 — 79 — 79 (1) Excludes investments measured at net asset value in the amount of $3.1 million at both March 31, 2020 and December 31, 2019 , which have not been classified in the fair value hierarchy.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2020
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, 2020 2019 Net income available to common stockholders $ 4,551 $ 8,771 Weighted average shares outstanding-basic 46,791,768 46,940,903 Effect of non-vested restricted stock and stock options outstanding 191,698 347,257 Weighted average shares outstanding-diluted 46,983,466 47,288,160 Earnings per share-basic $ 0.10 $ 0.19 Earnings per share-diluted $ 0.10 $ 0.19 Anti-dilutive shares 1,001,828 1,075,747

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Lease, Cost	Supplemental lease information at or for the three months ended March 31, 2020 , and March 31, 2019 is as follows (in thousands): Three Months Ended March 31, 2020 2019 Operating lease cost $ 1,439 $ 1,466 Variable lease cost 544 778 Net lease cost $ 1,983 $ 2,244 Cash paid for amounts included in measurement of operating lease liabilities $ 1,545 $ 1,327 Right-of-use assets obtained in exchange for new operating lease liabilities $ 3,028 $ 1,013 Weighted average remaining lease term 12.71 years 13.05 years Weighted average discount rate 3.59 % 3.60 %
Lessee, Operating Lease, Liability, Maturity	The following table summarizes lease payment obligations for each of the next five years and thereafter in addition to a reconcilement to the Company's current lease liability (dollars in thousands): Year Amount 2020 $ 4,719 2021 5,919 2022 5,311 2023 5,272 2024 4,935 Thereafter 33,230 Total lease payments 59,386 Less: imputed interest 13,454 Present value of lease liabilities $ 45,932

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Schedule of Non-Interest Income	The following table summarizes non-interest income for the periods indicated (dollars in thousands): Three Months Ended March 31, 2020 2019 Fees and service charges for customer services: Service charges $ 753 $ 782 ATM and card interchange fees 304 301 Investment fees 63 57 Total fees and service charges for customer services 1,120 1,140 Income on bank owned life insurance (1) 876 896 (Losses) gains on available-for-sale debt securities, net (1) (13 ) 155 (Losses) gains on trading securities, net (1) (1,992 ) 1,086 Swap income (1) 76 — Other 41 37 Total non-interest income $ 108 $ 3,314 (1) Not in scope of Topic 606

Debt Securities Available-for_3

Debt Securities Available-for-Sale - Comparative Summary of Mortgage-Backed Securities and Other Securities Available-for-Sale) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 1,046,738	$ 1,131,970
Gross unrealized gains	17,096	9,374
Gross unrealized losses	2,391	2,992
Debt securities available-for-sale	1,061,443	1,138,352
Real estate mortgage investment conduits (REMICs)
Debt Securities, Available-for-sale [Line Items]
Amortized cost	918,817	967,949
Gross unrealized gains	16,676	8,157
Gross unrealized losses	995	2,979
Debt securities available-for-sale	934,498	973,127
Other debt obligations
Debt Securities, Available-for-sale [Line Items]
Amortized cost	127,921	164,021
Gross unrealized gains	420	1,217
Gross unrealized losses	1,396	13
Debt securities available-for-sale	126,945	165,225
GSE | Pass-through Certificates
Debt Securities, Available-for-sale [Line Items]
Amortized cost	300,610	324,080
Gross unrealized gains	10,340	6,081
Gross unrealized losses	81	754
Debt securities available-for-sale	310,869	329,407
GSE | Real estate mortgage investment conduits (REMICs)
Debt Securities, Available-for-sale [Line Items]
Amortized cost	618,156	643,816
Gross unrealized gains	6,336	2,076
Gross unrealized losses	912	2,225
Debt securities available-for-sale	623,580	643,667
Non-GSE | Real estate mortgage investment conduits (REMICs)
Debt Securities, Available-for-sale [Line Items]
Amortized cost	51	53
Gross unrealized gains	0	0
Gross unrealized losses	2	0
Debt securities available-for-sale	49	53
Municipal bonds | Other debt obligations
Debt Securities, Available-for-sale [Line Items]
Amortized cost	278	296
Gross unrealized gains	1	3
Gross unrealized losses	0	0
Debt securities available-for-sale	279	299
Corporate bonds | Other debt obligations
Debt Securities, Available-for-sale [Line Items]
Amortized cost	127,643	163,725
Gross unrealized gains	419	1,214
Gross unrealized losses	1,396	13
Debt securities available-for-sale	$ 126,666	$ 164,926

Debt Securities Available-for_4

Debt Securities Available-for-Sale - Summary of Expected Maturity Distribution of Debt Securities Available-for-Sale, Other than Mortgage-Backed Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Amortized cost
Amortized cost	$ 1,046,738	$ 1,131,970
Estimated fair value
Estimated fair value	1,061,443	$ 1,138,352
Other Than Mortgage Backed Securities
Amortized cost
Due in one year or less	77,203
Due after one year through five years	50,718
Amortized cost	127,921
Estimated fair value
Due in one year or less	76,941
Due after one year through five years	50,004
Estimated fair value	$ 126,945

Debt Securities Available-for_5

Debt Securities Available-for-Sale - Narrative (Details)	3 Months Ended
	Mar. 31, 2020USD ($)security	Mar. 31, 2019USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, restricted | $	$ 732,000,000
Proceeds from sale of debt securities available-for-sale | $	0	$ 29,163,000
Debt securities, available-for-sale, realized gain | $	0	155,000
Debt securities, available-for-sale, realized loss | $	13,000	0
Debt securities, trading, realized gain (loss) | $	2,000,000	1,100,000
Other-than-temporary impairment loss, debt securities, available for sale, recognized in earnings | $	$ 0	$ 0
Real Estate Mortgage Investment Conduits (REMICs) | GSE | Pass Through
Debt Securities, Available-for-sale [Line Items]
Number of debt securities, unrealized loss position longer than 12 months	12
Real Estate Mortgage Investment Conduits (REMICs) | GSE | Non Pass Through
Debt Securities, Available-for-sale [Line Items]
Number of debt securities, unrealized loss position longer than 12 months	4
Number of debt securities, unrealized loss position less than 12 months	19
Real Estate Mortgage Investment Conduits (REMICs) | Non-GSE
Debt Securities, Available-for-sale [Line Items]
Number of debt securities, unrealized loss position longer than 12 months	1
Real Estate Mortgage Investment Conduits (REMICs) | Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Number of debt securities, unrealized loss position less than 12 months	2
Real Estate Mortgage Investment Conduits (REMICs) | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Number of debt securities, unrealized loss position less than 12 months	11
Pass-through Certificates | GSE | Pass Through
Debt Securities, Available-for-sale [Line Items]
Number of debt securities, unrealized loss position less than 12 months	2

Debt Securities Available-for_6

Debt Securities Available-for-Sale - Gross Unrealized Losses on Mortgage-Backed Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Unrealized losses, less than 12 months	$ 2,065	$ 975
Estimated fair value, less than 12 months	193,449	201,038
Unrealized losses, 12 months or more	326	2,017
Estimated fair value, 12 months or more	25,034	125,378
Unrealized losses, total	2,391	2,992
Estimated fair value, total	218,483	326,416
GSE | Pass-through Certificates
Debt Securities, Available-for-sale [Line Items]
Unrealized losses, less than 12 months	4	25
Estimated fair value, less than 12 months	109	3,404
Unrealized losses, 12 months or more	77	729
Estimated fair value, 12 months or more	634	55,184
Unrealized losses, total	81	754
Estimated fair value, total	743	58,588
GSE | Real estate mortgage investment conduits (REMICs)
Debt Securities, Available-for-sale [Line Items]
Unrealized losses, less than 12 months	665	950
Estimated fair value, less than 12 months	135,392	197,634
Unrealized losses, 12 months or more	247	1,275
Estimated fair value, 12 months or more	24,351	54,555
Unrealized losses, total	912	2,225
Estimated fair value, total	159,743	252,189
Non-GSE | Real estate mortgage investment conduits (REMICs)
Debt Securities, Available-for-sale [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	2	0
Estimated fair value, 12 months or more	49	53
Unrealized losses, total	2	0
Estimated fair value, total	49	53
Corporate bonds | Other debt obligations
Debt Securities, Available-for-sale [Line Items]
Unrealized losses, less than 12 months	1,396	0
Estimated fair value, less than 12 months	57,948	0
Unrealized losses, 12 months or more	0	13
Estimated fair value, 12 months or more	0	15,586
Unrealized losses, total	1,396	13
Estimated fair value, total	$ 57,948	$ 15,586

Debt Securities Held-to-Matur_3

Debt Securities Held-to-Maturity - Mortgage Backed Securities Held-to-Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 8,706	$ 8,762
Gross Unrealized Gains	296	129
Gross Unrealized Losses	0	5
Estimated Fair Value	9,002	8,886
Mortgage Backed Securities Pass Through Certificates
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	8,706	8,762
Gross Unrealized Gains	296	129
Gross Unrealized Losses	0	5
Estimated Fair Value	$ 9,002	$ 8,886

Debt Securities Held-to-Matur_4

Debt Securities Held-to-Maturity - Held-to-Maturity Securities in a Continuous Unrealized Loss Positions (Details)	3 Months Ended
	Mar. 31, 2020USD ($)loan	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities sold	$ 0	$ 0
Held-to-maturity securities pledged to secure borrowings and deposits	7,300,000
Unrealized losses
Less than 12 months			$ 0
12 months or more			5,000
Total			5,000
Estimated fair value
Less than 12 months			0
12 months or more			378,000
Total			378,000
Other-than-temporary impairment charge recognized in earnings	$ 0	$ 0
Mortgage Backed Securities Pass Through Certificates
Unrealized losses
Less than 12 months			0
12 months or more			5,000
Total			5,000
Estimated fair value
Less than 12 months			0
12 months or more			378,000
Total			$ 378,000
Number of mortgage-backed securities in unrealized loss position, greater than 12 months (loan) | loan	0

Equity Securities (Details)

Equity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	$ 3,483	$ 3,341
Equity securities without readily determinable fair value	3,100	3,100
Money Market Funds
Debt and Equity Securities, FV-NI [Line Items]
Equity securities, fair value	374	250
SBA Loan Fund
Debt and Equity Securities, FV-NI [Line Items]
Equity securities without readily determinable fair value	$ 3,100	$ 3,100

Loans - Net Loans Held-for-Inve

Loans - Net Loans Held-for-Investment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]
Loans held-for-investment, net	$ 3,509,137	$ 3,437,085
Allowance for loan losses	(36,800)	(28,707)	$ (27,486)	$ (27,497)
Net loans held-for-investment	3,472,337	3,408,378
Originated
Loans and Leases Receivable Disclosure [Line Items]
Loans	50,415	47,411
Deferred loan cost, net	7,680	7,614
Loans held-for-investment, net	3,098,760	2,987,067
Allowance for loan losses	(35,956)	(27,783)	(26,476)	(26,487)
Purchased Credit-Impaired
Loans and Leases Receivable Disclosure [Line Items]
Loans held-for-investment, net	16,886	17,365
Allowance for loan losses	(789)	(789)	(1,010)	(1,010)
Acquired Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	393,491	432,653
Loans held-for-investment, net	393,491	432,653
Allowance for loan losses	(55)	(135)	0	0
Real Estate | Originated
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,040,665	2,932,042
Real Estate | Originated | Multifamily
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,300,974	2,196,407
Loans held-for-investment, net	2,304,387	2,199,734
Allowance for loan losses	(26,889)	(20,203)	(18,346)	(18,084)
Real Estate | Originated | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans	527,498	528,681
Loans held-for-investment, net	528,104	529,287
Allowance for loan losses	(5,389)	(4,756)	(5,382)	(5,630)
Real Estate | Originated | One-to-Four Family
Loans and Leases Receivable Disclosure [Line Items]
Loans	84,880	83,742
Loans held-for-investment, net	86,404	85,355
Allowance for loan losses	(312)	(180)	(370)	(342)
Real Estate | Originated | Home equity and lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans	87,391	84,928
Loans held-for-investment, net	89,349	86,848
Allowance for loan losses	(574)	(317)	(336)	(291)
Real Estate | Originated | Construction and Land
Loans and Leases Receivable Disclosure [Line Items]
Loans	39,922	38,284
Loans held-for-investment, net	39,953	38,303
Allowance for loan losses	(671)	(536)	(574)	(463)
Real Estate | Acquired Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	384,435	423,964
Real Estate | Acquired Loans | Multifamily
Loans and Leases Receivable Disclosure [Line Items]
Loans	102,176	108,417
Real Estate | Acquired Loans | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans	102,284	113,027
Real Estate | Acquired Loans | One-to-Four Family
Loans and Leases Receivable Disclosure [Line Items]
Loans	167,934	187,975
Real Estate | Acquired Loans | Home equity and lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans	10,653	12,008
Real Estate | Acquired Loans | Construction and Land
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,388	2,537
Commercial and Industrial | Originated
Loans and Leases Receivable Disclosure [Line Items]
Loans	49,210	45,328
Loans held-for-investment, net	49,358	45,456
Allowance for loan losses	(2,035)	(1,640)	(1,376)	(1,569)
Commercial and Industrial | Acquired Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	9,056	8,689
Other | Originated
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,205	2,083
Loans held-for-investment, net	1,205	2,084
Allowance for loan losses	$ (86)	$ (151)	$ (92)	$ (108)

Loans - Narrative, PCI Loans (D

Loans - Narrative, PCI Loans (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable held-for-sale, amount	$ 0	$ 0
PCI loans	$ 3,509,137,000	$ 3,437,085,000
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of PCI loans	30.00%	29.00%
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of PCI loans	41.00%	42.00%
Purchased Credit-Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	$ 16,886,000	$ 17,365,000

Loans - Summary of Accretable Y

Loans - Summary of Accretable Yield (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accretable Yield Movement Schedule [Roll Forward]
Balance at the beginning of period	$ 17,086	$ 21,846
Accretion into interest income	(803)	(1,049)
Balance at end of period	$ 16,283	$ 20,797

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, 2020	Mar. 31, 2019	Dec. 31, 2019
Allowance for loan losses:
Beginning Balance	$ 28,707	$ 27,497
Charge-offs	(470)	(92)
Recoveries	380	22
Provisions (credit)	8,183	59
Ending balance	36,800	27,486
Ending balance: individually evaluated for impairment	62		$ 142
Ending balance: collectively evaluated for impairment	36,738		28,565
Loans, net:
Loans held-for-investment, net	3,509,137		3,437,085
Ending balance: individually evaluated for impairment	20,517		20,957
Ending balance: collectively evaluated for impairment	3,488,620		3,416,128
Originated
Allowance for loan losses:
Beginning Balance	27,783	26,487
Charge-offs	(37)	(32)
Recoveries	372	13
Provisions (credit)	7,838	8
Ending balance	35,956	26,476
Ending balance: individually evaluated for impairment	7		7
Ending balance: collectively evaluated for impairment	35,949		27,776
Loans, net:
Loans held-for-investment, net	3,098,760		2,987,067
Ending balance: individually evaluated for impairment	14,733		16,177
Ending balance: collectively evaluated for impairment	3,084,027		2,970,890
Purchased Credit-Impaired
Allowance for loan losses:
Beginning Balance	789	1,010
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	0	0
Ending balance	789	1,010
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	789		789
Loans, net:
Loans held-for-investment, net	16,886		17,365
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	16,886		17,365
Acquired Loans
Allowance for loan losses:
Beginning Balance	135	0
Charge-offs	(433)	(60)
Recoveries	8	9
Provisions (credit)	345	51
Ending balance	55	0
Ending balance: individually evaluated for impairment	55		135
Ending balance: collectively evaluated for impairment	0		0
Loans, net:
Loans held-for-investment, net	393,491		432,653
Ending balance: individually evaluated for impairment	5,784		4,780
Ending balance: collectively evaluated for impairment	387,707		427,873
Real Estate | Commercial | Originated
Allowance for loan losses:
Beginning Balance	4,756	5,630
Charge-offs	0	(6)
Recoveries	370	13
Provisions (credit)	263	(255)
Ending balance	5,389	5,382
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	5,389		4,756
Loans, net:
Loans held-for-investment, net	528,104		529,287
Ending balance: individually evaluated for impairment	11,815		13,226
Ending balance: collectively evaluated for impairment	516,289		516,061
Real Estate | One-to-Four Family | Originated
Allowance for loan losses:
Beginning Balance	180	342
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	132	28
Ending balance	312	370
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	312		180
Loans, net:
Loans held-for-investment, net	86,404		85,355
Ending balance: individually evaluated for impairment	1,816		1,841
Ending balance: collectively evaluated for impairment	84,588		83,514
Real Estate | Construction and Land | Originated
Allowance for loan losses:
Beginning Balance	536	463
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	135	111
Ending balance	671	574
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	671		536
Loans, net:
Loans held-for-investment, net	39,953		38,303
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	39,953		38,303
Real Estate | Multifamily | Originated
Allowance for loan losses:
Beginning Balance	20,203	18,084
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	6,686	262
Ending balance	26,889	18,346
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	26,889		20,203
Loans, net:
Loans held-for-investment, net	2,304,387		2,199,734
Ending balance: individually evaluated for impairment	994		997
Ending balance: collectively evaluated for impairment	2,303,393		2,198,737
Real Estate | Home equity and lines of credit | Originated
Allowance for loan losses:
Beginning Balance	317	291
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	257	45
Ending balance	574	336
Ending balance: individually evaluated for impairment	3		3
Ending balance: collectively evaluated for impairment	571		314
Loans, net:
Loans held-for-investment, net	89,349		86,848
Ending balance: individually evaluated for impairment	53		55
Ending balance: collectively evaluated for impairment	89,296		86,793
Commercial and Industrial | Originated
Allowance for loan losses:
Beginning Balance	1,640	1,569
Charge-offs	(37)	(26)
Recoveries	2	0
Provisions (credit)	430	(167)
Ending balance	2,035	1,376
Ending balance: individually evaluated for impairment	4		4
Ending balance: collectively evaluated for impairment	2,031		1,636
Loans, net:
Loans held-for-investment, net	49,358		45,456
Ending balance: individually evaluated for impairment	55		58
Ending balance: collectively evaluated for impairment	49,303		45,398
Other | Originated
Allowance for loan losses:
Beginning Balance	151	108
Charge-offs	0	0
Recoveries	0	0
Provisions (credit)	(65)	(16)
Ending balance	86	$ 92
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	86		151
Loans, net:
Loans held-for-investment, net	1,205		2,084
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	$ 1,205		$ 2,084

Loans - Narrative, Loan-to-Valu

Loans - Narrative, Loan-to-Value Ratios (Details)	Mar. 31, 2020
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, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	$ 3,098,760	$ 2,987,067
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	3,083,462	2,968,346
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,699	2,850
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	13,599	15,871
Real Estate | Multifamily | Less Than 35% LTV
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	247,893	233,251
Real Estate | Multifamily | Less Than 35% LTV | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	247,304	232,950
Real Estate | Multifamily | Less Than 35% LTV | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	291	0
Real Estate | Multifamily | Less Than 35% LTV | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	298	301
Real Estate | Multifamily | Equal to or Greater than 35% LTV
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	2,056,494	1,966,483
Real Estate | Multifamily | Equal to or Greater than 35% LTV | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	2,051,039	1,960,984
Real Estate | Multifamily | Equal to or Greater than 35% LTV | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	292	296
Real Estate | Multifamily | Equal to or Greater than 35% LTV | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	5,163	5,203
Real Estate | Commercial mortgage | Less Than 35% LTV
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	89,069	79,855
Real Estate | Commercial mortgage | Less Than 35% LTV | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	89,069	79,485
Real Estate | Commercial mortgage | Less Than 35% LTV | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	370
Real Estate | Commercial mortgage | Less Than 35% LTV | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	439,035	449,432
Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	432,711	440,065
Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	1,092
Real Estate | Commercial mortgage | Equal to or Greater than 35% LTV | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	6,324	8,275
Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	55,424	55,060
Real Estate | One-to-four family residential mortgage | Less Than 60% LTV | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	53,091	52,886
Real Estate | One-to-four family residential mortgage | Less Than 60% LTV | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	770	777
Real Estate | One-to-four family residential mortgage | Less Than 60% LTV | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,563	1,397
Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	30,980	30,295
Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	30,953	29,967
Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	27	328
Real Estate | Construction and land
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	39,953	38,303
Real Estate | Construction and land | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	39,953	38,303
Real Estate | Construction and land | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Real Estate | Construction and land | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Real Estate | Home equity and lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	89,349	86,848
Real Estate | Home equity and lines of credit | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	89,082	86,547
Real Estate | Home equity and lines of credit | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	80	14
Real Estate | Home equity and lines of credit | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	187	287
Commercial and Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	49,358	45,456
Commercial and Industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	49,055	45,075
Commercial and Industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	266	301
Commercial and Industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	37	80
Other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,205	2,084
Other | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,205	2,084
Other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	$ 0	$ 0

Loans - Narrative, Loans (Detai

Loans - Narrative, Loans (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Investment in non accrual loans	$ 8,800,000	$ 9,400,000
Criteria days for delinquent status	90 days	90 days
Impairment of loans	$ 6,500,000	$ 6,800,000
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	2,300,000	2,600,000
Loans held-for-sale, non-accrual	0	0
90 days or more past due and accruing	656,000	518,000
Impaired loans not written down	$ 16,200,000	$ 15,900,000

Loans - PCI Loan Pools (Details

Loans - PCI Loan Pools (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
90 Days or More Past Due and Accruing	$ 656	$ 518
Originated loans held-for-investment, net	3,098,760	2,987,067
Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	3,098,760
Pass | Loans Held For Investment | Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Originated loans held-for-investment, net	1,205
Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	8,771	9,433
90 Days or More Past Due and Accruing	656	518
Total Non-Performing Loans	9,427	9,951
Non-Performing Loans | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,775	3,094
90 Days or More Past Due and Accruing	464	114
Total Non-Performing Loans	2,239	3,208
Non-Performing Loans | Loans Held For Investment | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
90 Days or More Past Due and Accruing	291
Total Non-Performing Loans	291
Non-Performing Loans | Loans Held For Investment | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		2,416
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		2,416
Non-Performing Loans | Loans Held For Investment | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,108
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	1,108
Non-Performing Loans | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	485
90 Days or More Past Due and Accruing	173
Total Non-Performing Loans	658
Non-Performing Loans | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	512	522
90 Days or More Past Due and Accruing	173	114
Total Non-Performing Loans	685	636
Non-Performing Loans | Loans Held For Investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	155	156
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	155	156
Non-Performing Loans | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6,996	6,339
90 Days or More Past Due and Accruing	192	404
Total Non-Performing Loans	7,188	6,743
Non-Performing Loans | Loans acquired | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6,167	5,506
90 Days or More Past Due and Accruing	186	253
Total Non-Performing Loans	6,353	5,759
Non-Performing Loans | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	367	368
90 Days or More Past Due and Accruing	6	151
Total Non-Performing Loans	373	519
Non-Performing Loans | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	434	437
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	434	437
Non-Performing Loans | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		28
90 Days or More Past Due and Accruing		0
Total Non-Performing Loans		28
Non-Performing Loans | Substandard | Loans Held For Investment | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		2,416
90 Days or More Past Due and Accruing
Total Non-Performing Loans		2,416
Non-Performing Loans | Substandard | Loans Held For Investment | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,108
90 Days or More Past Due and Accruing	0
Total Non-Performing Loans	1,108
Non-Performing Loans | Substandard | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	485	493
90 Days or More Past Due and Accruing	0	114
Total Non-Performing Loans	485	607
Non-Performing Loans | Substandard | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	27	29
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	27	29
Non-Performing Loans | Substandard | Loans Held For Investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	155	156
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	155	156
Non-Performing Loans | Substandard | Loans acquired | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	266	267
90 Days or More Past Due and Accruing	66	66
Total Non-Performing Loans	332	333
Non-Performing Loans | Substandard | Loans acquired | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	5,901	5,239
90 Days or More Past Due and Accruing	120	187
Total Non-Performing Loans	6,021	5,426
Non-Performing Loans | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	274	275
90 Days or More Past Due and Accruing	6	151
Total Non-Performing Loans	280	426
Non-Performing Loans | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	93	93
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	93	93
Non-Performing Loans | Substandard | Loans acquired | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	40	40
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	40	40
Non-Performing Loans | Substandard | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	394	397
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	394	397
Non-Performing Loans | Substandard | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	28	28
90 Days or More Past Due and Accruing	0	0
Total Non-Performing Loans	28	28
Non-Performing Loans | Pass | Loans Held For Investment | Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Non-Performing Loans
Non-Performing Loans | Special Mention | Loans Held For Investment | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
90 Days or More Past Due and Accruing	291
Total Non-Performing Loans	291
Non-Performing Loans | Special Mention | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
90 Days or More Past Due and Accruing	173
Total Non-Performing Loans	173
Non-Performing Loans | 0-29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,076	3,839
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	221	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	221
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	221	0
Non-Performing Loans | 0-29 Days Past Due | Loans Held For Investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 0-29 Days Past Due | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,855	3,839
Non-Performing Loans | 0-29 Days Past Due | Loans acquired | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,815	3,609
Non-Performing Loans | 0-29 Days Past Due | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	190
Non-Performing Loans | 0-29 Days Past Due | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	40	40
Non-Performing Loans | 0-29 Days Past Due | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans Held For Investment | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans Held For Investment | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	221	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans Held For Investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	79
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,815	3,530
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	190
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	40	40
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 0-29 Days Past Due | Substandard | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 0-29 Days Past Due | Special Mention | Loans Held For Investment | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 0-29 Days Past Due | Special Mention | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,197	493
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	280	96
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	187
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	214	29
Non-Performing Loans | 30-89 Days Past Due | Loans Held For Investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	66	67
Non-Performing Loans | 30-89 Days Past Due | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,917	397
Non-Performing Loans | 30-89 Days Past Due | Loans acquired | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,334	0
Non-Performing Loans | 30-89 Days Past Due | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	189	0
Non-Performing Loans | 30-89 Days Past Due | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	394	397
Non-Performing Loans | 30-89 Days Past Due | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans Held For Investment | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans Held For Investment | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	187	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	27	29
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans Held For Investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	66	67
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	79	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,255	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	189	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	394	397
Non-Performing Loans | 30-89 Days Past Due | Substandard | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 30-89 Days Past Due | Special Mention | Loans Held For Investment | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 30-89 Days Past Due | Special Mention | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,498	5,101
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,274	2,998
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		2,416
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,108
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	77
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	77	493
Non-Performing Loans | 90 Days or More Past Due | Loans Held For Investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	89	89
Non-Performing Loans | 90 Days or More Past Due | Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,224	2,103
Non-Performing Loans | 90 Days or More Past Due | Loans acquired | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,018	1,897
Non-Performing Loans | 90 Days or More Past Due | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	178	178
Non-Performing Loans | 90 Days or More Past Due | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 90 Days or More Past Due | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		28
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans Held For Investment | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		2,416
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans Held For Investment | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,108
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	77	493
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans Held For Investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	89	89
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	187	188
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,831	1,709
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	85	85
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	93	93
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Non-Performing Loans | 90 Days or More Past Due | Substandard | Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	28	$ 28
Non-Performing Loans | 90 Days or More Past Due | Special Mention | Loans Held For Investment | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Non-Performing Loans | 90 Days or More Past Due | Special Mention | Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0
Performing (Accruing) Loans | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,096,521
Performing (Accruing) Loans | Pass | Loans Held For Investment | Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,205
Performing (Accruing) Loans | 0-29 Days Past Due | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,086,525
Performing (Accruing) Loans | 0-29 Days Past Due | Pass | Loans Held For Investment | Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,205
Performing (Accruing) Loans | 30-89 Days Past Due | Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	9,996
Performing (Accruing) Loans | 30-89 Days Past Due | Pass | Loans Held For Investment | Other Loans [Member]
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, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	$ 3,098,760	$ 2,987,067
Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,771	9,433
Non-Performing Loans	9,427	9,951
Loans Held For Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net		2,987,067
Loans Held For Investment | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	298
Loans Held For Investment | Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	528,104	529,287
Loans Held For Investment | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	89,069	79,855
Loans Held For Investment | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	439,035	449,432
Loans Held For Investment | Real Estate | Commercial | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	89,069	79,485
Loans Held For Investment | Real Estate | Commercial | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	432,711	440,065
Loans Held For Investment | Real Estate | Commercial | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	6,324	8,275
Loans Held For Investment | Real Estate | Commercial | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net		370
Loans Held For Investment | Real Estate | Commercial | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net		1,092
Loans Held For Investment | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	86,404	85,355
Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	55,423	55,060
Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	30,981	30,295
Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	53,089	52,886
Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	30,954	29,967
Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,564	1,397
Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	27	328
Loans Held For Investment | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	770	777
Loans Held For Investment | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	39,953	38,303
Loans Held For Investment | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	39,953	38,303
Loans Held For Investment | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	2,304,387	2,199,734
Loans Held For Investment | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	247,893	233,251
Loans Held For Investment | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	2,056,494	1,966,483
Loans Held For Investment | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	247,304	232,950
Loans Held For Investment | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	2,051,038	1,960,984
Loans Held For Investment | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net		301
Loans Held For Investment | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	5,164	5,203
Loans Held For Investment | Real Estate | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	291
Loans Held For Investment | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	292	296
Loans Held For Investment | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	89,349	86,848
Loans Held For Investment | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	89,082	86,547
Loans Held For Investment | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	187	287
Loans Held For Investment | Real Estate | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	80	14
Loans Held For Investment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	49,358	45,456
Loans Held For Investment | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	49,055	45,075
Loans Held For Investment | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	37	80
Loans Held For Investment | Commercial and Industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	266	301
Loans Held For Investment | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net		2,084
Loans Held For Investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		2,983,859
Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	298
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	526,996	526,871
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	89,069	79,855
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	437,927	447,016
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	89,069	79,485
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	432,711	440,065
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	5,216	5,859
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		370
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		1,092
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	85,719	84,719
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	54,765	54,453
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	30,954	30,266
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	53,089	52,886
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	30,954	29,967
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,079	790
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	299
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	597	777
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	39,953	38,303
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	39,953	38,303
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,304,096	2,199,734
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	247,602	233,251
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,056,494	1,966,483
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	247,304	232,950
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,051,038	1,960,984
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		301
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	5,164	5,203
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	292	296
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	89,194	86,692
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	89,082	86,547
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	32	131
Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	80	14
Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	49,358	45,456
Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	49,055	45,075
Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	37	80
Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	266	301
Loans Held For Investment | Performing (Accruing) Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		2,084
Loans Held For Investment | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		3,208
Loans Held For Investment | Non-Performing Loans | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	1,108	2,416
Loans Held For Investment | Non-Performing Loans | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	1,108	2,416
Loans Held For Investment | Non-Performing Loans | Real Estate | Commercial | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Commercial | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Commercial | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	1,108	2,416
Loans Held For Investment | Non-Performing Loans | Real Estate | Commercial | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Loans Held For Investment | Non-Performing Loans | Real Estate | Commercial | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Loans Held For Investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	685	636
Loans Held For Investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	658	607
Loans Held For Investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	27	29
Loans Held For Investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	485	607
Loans Held For Investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	27	29
Loans Held For Investment | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	173	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	291	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	291	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Loans Held For Investment | Non-Performing Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	291
Loans Held For Investment | Non-Performing Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	155	156
Loans Held For Investment | Non-Performing Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	155	156
Loans Held For Investment | Non-Performing Loans | Real Estate | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Commercial and Industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans Held For Investment | Non-Performing Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
Loans acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	393,491	432,653
Loans acquired | Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	102,284	113,027
Loans acquired | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	36,278	37,351
Loans acquired | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	66,006	75,676
Loans acquired | Real Estate | Commercial | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	34,319	35,460
Loans acquired | Real Estate | Commercial | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	51,245	60,311
Loans acquired | Real Estate | Commercial | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	870	703
Loans acquired | Real Estate | Commercial | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	14,286	14,767
Loans acquired | Real Estate | Commercial | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,089	1,188
Loans acquired | Real Estate | Commercial | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	475	598
Loans acquired | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	167,934	187,975
Loans acquired | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	154,069	173,766
Loans acquired | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	13,865	14,209
Loans acquired | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	153,409	172,955
Loans acquired | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	13,772	14,116
Loans acquired | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	279	426
Loans acquired | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	93	93
Loans acquired | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	381	385
Loans acquired | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,388	2,537
Loans acquired | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	1,388	2,537
Loans acquired | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	102,176	108,417
Loans acquired | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	99,184	105,367
Loans acquired | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	2,992	3,050
Loans acquired | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	99,144	105,327
Loans acquired | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	2,597	2,653
Loans acquired | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	40	40
Loans acquired | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	395	397
Loans acquired | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	10,653	12,008
Loans acquired | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	10,541	11,892
Loans acquired | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	112	116
Loans acquired | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	9,056	8,689
Loans acquired | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	9,056	8,689
Loans acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net		0
Loans acquired | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable, net	0
Loans acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	386,303	425,910
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	95,931	107,268
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	35,946	37,017
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	59,985	70,251
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	34,319	35,460
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	51,245	60,311
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	538	369
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	8,265	9,342
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,089	1,188
Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	475	598
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	167,562	187,456
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	153,790	173,340
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	13,772	14,116
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	153,409	172,955
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	13,772	14,116
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	381	385
Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,388	2,537
Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,388	2,537
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	101,741	107,980
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	99,144	105,327
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,597	2,653
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	99,144	105,327
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,597	2,653
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	10,625	11,980
Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	10,541	11,892
Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	84	88
Loans acquired | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	9,056	8,689
Loans acquired | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	9,056	8,689
Loans acquired | Performing (Accruing) Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
Loans acquired | Performing (Accruing) Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
Loans acquired | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	7,188	6,743
Loans acquired | Non-Performing Loans | Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	6,353	5,759
Loans acquired | Non-Performing Loans | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	332	334
Loans acquired | Non-Performing Loans | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	6,021	5,425
Loans acquired | Non-Performing Loans | Real Estate | Commercial | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Commercial | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Commercial | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	332	334
Loans acquired | Non-Performing Loans | Real Estate | Commercial | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	6,021	5,425
Loans acquired | Non-Performing Loans | Real Estate | Commercial | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Commercial | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	372	519
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	279	426
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	93	93
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	279	426
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	93	93
Loans acquired | Non-Performing Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	435	437
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	40	40
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	395	397
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	40	40
Loans acquired | Non-Performing Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	395	397
Loans acquired | Non-Performing Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	28	28
Loans acquired | Non-Performing Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	28	28
Loans acquired | Non-Performing Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	0	0
Loans acquired | Non-Performing Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans		0
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]
Total Loans Receivable, net	3,492,251	3,419,720
Total Loans Include Loans Acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,482,824	3,409,769
Total Loans Include Loans Acquired | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Performing Loans	9,427	9,951
0-29 Days Past Due | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,076	3,839
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		2,980,106
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	298
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	521,078	525,326
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	88,944	79,753
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	432,134	445,573
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	88,944	79,383
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	431,886	439,253
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	248	5,228
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		370
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		1,092
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	83,252	83,587
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	54,146	53,547
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	29,106	30,040
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	53,067	52,757
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	29,106	29,741
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,079	790
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	299
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	39,953	38,156
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	39,953	38,156
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,303,124	2,199,187
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	247,602	232,959
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,055,522	1,966,228
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	247,304	232,658
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,051,038	1,960,729
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		301
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,192	5,203
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	292	296
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	88,958	86,525
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	88,846	86,380
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	32	131
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	80	14
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	48,955	45,267
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	48,689	44,886
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	80
0-29 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	266	301
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		2,058
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	382,306	421,457
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	93,698	103,363
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	35,536	36,536
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	58,162	66,827
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	34,004	35,173
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	51,245	60,311
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	538	369
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	6,783	6,382
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	994	994
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	134	134
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	165,902	186,998
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	152,130	172,882
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	13,772	14,116
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	152,130	172,882
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	13,772	14,116
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,388	2,537
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,388	2,537
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	101,741	107,980
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	99,144	105,327
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,597	2,653
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	99,144	105,327
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,597	2,653
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	10,521	11,930
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	10,437	11,842
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	84	88
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	9,056	8,649
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	9,056	8,649
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
0-29 Days Past Due | Loans acquired | Performing (Accruing) Loans | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
0-29 Days Past Due | Total Loans Include Loans Acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,468,831	3,401,563
30-89 Days Past Due | Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,197	493
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		3,753
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	5,918	1,545
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	125	102
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	5,793	1,443
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	125	102
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	825	812
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	4,968	631
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,467	1,132
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	619	906
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,848	226
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	22	129
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,848	226
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	597	777
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	147
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	147
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	972	547
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	292
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	972	255
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	292
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	255
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans		0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	972	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Multifamily | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	236	167
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	236	167
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	403	189
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	366	189
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	37	0
30-89 Days Past Due | Loans Held For Investment | Performing (Accruing) Loans | Commercial and Industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
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		26
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	3,997	4,453
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	2,233	3,905
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	410	481
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,823	3,424
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	315	287
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,482	2,960
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	95	194
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Commercial | Special Mention | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	341	464
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,660	458
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,660	458
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	1,279	73
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Pass | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Substandard | Equal to or Greater than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | One-to-four family residential mortgage | Special Mention | Less Than 60% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	381	385
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Construction and land | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Pass | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Less Than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Multifamily | Substandard | Equal to or Greater than 35% LTV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	104	50
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	104	50
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Real Estate | Home equity and lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	0
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	40
30-89 Days Past Due | Loans acquired | Performing (Accruing) Loans | Commercial and Industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Performing (Accruing) Loans	0	40
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	$ 13,993	$ 8,206

Loans - Summary of Impaired Loa

Loans - Summary of Impaired Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Recorded Investment
With No Allowance Recorded	$ 16,200	$ 15,900
Total	20,517	20,957
Unpaid Principal Balance
Total	23,205	23,132
Related Allowance	(62)	(142)
Real Estate | Commercial
Recorded Investment
Total	16,927	17,327
Unpaid Principal Balance
Total	19,025	18,916
Related Allowance	(55)	(135)
Real Estate | One-to-four family residential mortgage
Recorded Investment
Total	2,448	2,479
Unpaid Principal Balance
Total	2,568	2,595
Related Allowance	0	0
Real Estate | Multifamily
Recorded Investment
Total	1,034	1,038
Unpaid Principal Balance
Total	1,505	1,508
Related Allowance	0	0
Real Estate | Home equity and lines of credit
Recorded Investment
Total	53	55
Unpaid Principal Balance
Total	52	55
Related Allowance	(3)	(3)
Real Estate | Home equity and lines of credit | Substandard
Recorded Investment
With a Related Allowance Recorded	33	33
Unpaid Principal Balance
With a Related Allowance Recorded	32	33
Related Allowance	(3)	(3)
Real Estate | Home equity and lines of credit | Pass
Recorded Investment
With No Allowance Recorded	20	22
Unpaid Principal Balance
With No Allowance Recorded	20	22
Commercial and Industrial
Recorded Investment
Total	55	58
Unpaid Principal Balance
Total	55	58
Related Allowance	(4)	(4)
Commercial and Industrial | Substandard
Recorded Investment
With No Allowance Recorded	37	39
Unpaid Principal Balance
With No Allowance Recorded	37	39
Commercial and Industrial | Special Mention
Recorded Investment
With a Related Allowance Recorded	18	19
Unpaid Principal Balance
With a Related Allowance Recorded	18	19
Related Allowance	(4)	(4)
Less Than 35% LTV | Real Estate | Commercial | Substandard
Recorded Investment
With No Allowance Recorded	0	0
Unpaid Principal Balance
With No Allowance Recorded	139	139
Less Than 35% LTV | Real Estate | Multifamily | Substandard
Recorded Investment
With No Allowance Recorded	40	40
Unpaid Principal Balance
With No Allowance Recorded	40	40
Equal to or Greater than 35% LTV | Real Estate | Commercial | Substandard
Recorded Investment
With No Allowance Recorded	10,883	10,438
With a Related Allowance Recorded	553	1,307
Unpaid Principal Balance
With No Allowance Recorded	11,089	11,002
With a Related Allowance Recorded	1,419	1,307
Related Allowance	(55)	(135)
Equal to or Greater than 35% LTV | Real Estate | Commercial | Pass
Recorded Investment
With No Allowance Recorded	5,491	5,582
Unpaid Principal Balance
With No Allowance Recorded	6,378	6,468
Equal to or Greater than 35% LTV | Real Estate | Multifamily | Substandard
Recorded Investment
With No Allowance Recorded	972	972
Unpaid Principal Balance
With No Allowance Recorded	972	972
Equal to or Greater than 35% LTV | Real Estate | Multifamily | Pass
Recorded Investment
With No Allowance Recorded	22	26
Unpaid Principal Balance
With No Allowance Recorded	493	496
Less Than 60% LTV | One-to-four family residential mortgage | Special Mention
Recorded Investment
With No Allowance Recorded	382	385
Unpaid Principal Balance
With No Allowance Recorded	382	385
Less Than 60% LTV | Real Estate | One-to-four family residential mortgage | Substandard
Recorded Investment
With No Allowance Recorded	556	564
With a Related Allowance Recorded	0	0
Unpaid Principal Balance
With No Allowance Recorded	556	564
With a Related Allowance Recorded	0	0
Related Allowance	0	0
Less Than 60% LTV | Real Estate | One-to-four family residential mortgage | Pass
Recorded Investment
With No Allowance Recorded	1,363	1,379
Unpaid Principal Balance
With No Allowance Recorded	1,449	1,463
Equal to or Greater than 60% LTV | Real Estate | One-to-four family residential mortgage | Substandard
Recorded Investment
With No Allowance Recorded	27	29
Unpaid Principal Balance
With No Allowance Recorded	27	29
Equal to or Greater than 60% LTV | Real Estate | One-to-four family residential mortgage | Pass
Recorded Investment
With No Allowance Recorded	120	122
Unpaid Principal Balance
With No Allowance Recorded	$ 154	$ 154

Loans - Average Recorded Invest

Loans - Average Recorded Investment and Interest Recognized on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Average Recorded Investment
Total	$ 20,738	$ 21,918
Interest Income
Total	159	210
Real Estate | Commercial
Average Recorded Investment
Total	17,128	17,751
Interest Income
Total	112	150
Real Estate | One-to-four family residential mortgage
Average Recorded Investment
Total	2,464	2,672
Interest Income
Total	33	34
Real Estate | Multifamily
Average Recorded Investment
Total	1,036	1,364
Interest Income
Total	13	25
Real Estate | Home equity and lines of credit
Average Recorded Investment
Total	54	60
Interest Income
Total	1	1
Real Estate | Home equity and lines of credit | Pass
Average Recorded Investment
With No Allowance Recorded	21	27
Interest Income
With No Allowance Recorded	0	0
Real Estate | Home equity and lines of credit | Substandard
Average Recorded Investment
With a Related Allowance Recorded	33	33
Interest Income
With a Related Allowance Recorded	1	1
Commercial and Industrial
Average Recorded Investment
Total	56	71
Interest Income
Total	0	0
Commercial and Industrial | Substandard
Average Recorded Investment
With No Allowance Recorded	38	50
Interest Income
With No Allowance Recorded	0	0
Commercial and Industrial | Special Mention
Average Recorded Investment
With a Related Allowance Recorded	18	21
Interest Income
With a Related Allowance Recorded	0	0
Less Than 35% LTV | Real Estate | Multifamily | Substandard
Average Recorded Investment
With No Allowance Recorded	40	100
Interest Income
With No Allowance Recorded	0	1
Equal to or Greater than 35% LTV | Real Estate | Commercial | Pass
Average Recorded Investment
With No Allowance Recorded	5,537	5,888
Interest Income
With No Allowance Recorded	75	78
Equal to or Greater than 35% LTV | Real Estate | Commercial | Substandard
Average Recorded Investment
With No Allowance Recorded	10,661	11,604
With a Related Allowance Recorded	930	259
Interest Income
With No Allowance Recorded	37	72
With a Related Allowance Recorded	0	0
Equal to or Greater than 35% LTV | Real Estate | Multifamily | Pass
Average Recorded Investment
With No Allowance Recorded	24	37
Interest Income
With No Allowance Recorded	4	4
Equal to or Greater than 35% LTV | Real Estate | Multifamily | Substandard
Average Recorded Investment
With No Allowance Recorded	972	1,227
Interest Income
With No Allowance Recorded	9	20
Less Than 60% LTV | Real Estate | One-to-four family residential mortgage | Pass
Average Recorded Investment
With No Allowance Recorded	1,371	1,677
Interest Income
With No Allowance Recorded	16	22
Less Than 60% LTV | Real Estate | One-to-four family residential mortgage | Substandard
Average Recorded Investment
With No Allowance Recorded	560	240
With a Related Allowance Recorded	0	502
Interest Income
With No Allowance Recorded	11	3
With a Related Allowance Recorded	0	5
Less Than 60% LTV | Real Estate | One-to-four family residential mortgage | Special Mention
Average Recorded Investment
With No Allowance Recorded	384	0
Interest Income
With No Allowance Recorded	5	0
Equal to or Greater than 60% LTV | Real Estate | One-to-four family residential mortgage | Pass
Average Recorded Investment
With No Allowance Recorded	121	128
Interest Income
With No Allowance Recorded	1	1
Equal to or Greater than 60% LTV | Real Estate | One-to-four family residential mortgage | Substandard
Average Recorded Investment
With No Allowance Recorded	28	125
Interest Income
With No Allowance Recorded	$ 0	$ 3

Loans - Narrative, Troubled Deb

Loans - Narrative, Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020USD ($)contract	Mar. 31, 2019USD ($)contract	Jun. 30, 2018contract	Dec. 31, 2019USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of relationships (contract) | contract	0	2
Pre-Modification Outstanding Recorded Investment		$ 2,836
Post-Modification Outstanding Recorded Investment		$ 2,836
Troubled debt restructurings	$ 17,100			$ 18,500
Number of TDR loans restructured that subsequently defaulted (contract) | contract	1	0	0
Loans restructured that subsequently defaulted	$ 27
One-to-Four Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of relationships (contract) | contract		1
Pre-Modification Outstanding Recorded Investment		$ 2
Post-Modification Outstanding Recorded Investment		$ 2
Commercial Mortgage Backed Securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of relationships (contract) | contract		1
Pre-Modification Outstanding Recorded Investment		$ 2,834
Post-Modification Outstanding Recorded Investment		$ 2,834

Deposits - Deposit Account Bala

Deposits - Deposit Account Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Banking and Thrift [Abstract]
Non-interest-bearing checking	$ 394,836	$ 387,409
Negotiable orders of withdrawal (NOW) and interest-bearing checking	605,652	573,927
Savings and money market	1,385,593	1,398,345
Certificates of deposit	1,099,465	1,048,552
Total deposits	$ 3,485,546	$ 3,408,233

Deposits - Interest Expense On

Deposits - Interest Expense On Deposits (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Banking and Thrift [Abstract]
NOW and interest-bearing checking, savings, and money market	$ 4,073	$ 4,794
Certificates of deposit	5,206	5,453
Total interest expense on deposit accounts	$ 9,279	$ 10,247

Equity Incentive Plans - Stock

Equity Incentive Plans - Stock Options Outstanding (Details) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Number of Stock Options
Beginning Balance (shares)	2,227,193
Exercised (shares)	(13,000)
Ending Balance (shares)	2,214,193	2,227,193
Exercisable (shares)	2,033,272
Weighted Average Grant Date Fair Value
Beginning Balance (usd per share)	$ 4.01
Exercised (usd per share)	3.93
Ending Balance (usd per share)	4.01	$ 4.01
Exercisable (usd per share)	3.99
Weighted Average Exercise Price
Beginning Balance (usd per share)	13.93
Exercised (usd per share)	13.38
Ending Balance (usd per share)	13.94	$ 13.93
Exercisable (usd per share)	$ 13.84
Weighted Average Contractual Life (years)
Outstanding	4 years 8 months 15 days	4 years 11 months 15 days
Exercised	4 years 4 months 6 days
Exercisable	4 years 7 months 28 days

Equity Incentive Plans - Narrat

Equity Incentive Plans - Narrative (Details)	Feb. 17, 2020USD ($)shares	Mar. 31, 2020USD ($)shares	Mar. 31, 2019USD ($)	Mar. 31, 2020USD ($)shares	May 22, 2019shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		103,581
Allocated share-based compensation expense | $		$ 448,000	$ 1,300,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected future stock-based compensation expense | $		$ 155,000		$ 155,000
Average period of expected future stock option expense		2 months 26 days
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected future stock-based compensation expense | $		$ 1,800,000		$ 1,800,000
Average period of expected future stock option expense		2 years 1 month 20 days
Two Thousand Nineteen Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (shares)					6,000,000
Number of shares authorized, issued in form of restricted stock reduction multiplier					4.5
Stock options granted (shares)				0
Two Thousand Nineteen Equity Incentive Plan | Restricted Stock and Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (shares)					1,333,333
Two Thousand Nineteen Equity Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	83,744
Grant date value | $	$ 1,300,000
Two Thousand Nineteen Equity Incentive Plan | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	19,837
Grant date value | $	$ 313,623
Award vesting period	3 years
Vesting Period One | Two Thousand Nineteen Equity Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	28,460
Award vesting period	1 year
Vesting Period Two | Two Thousand Nineteen Equity Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	55,284
Award vesting period	5 years
Period after grant date to begin vesting period	1 year
Minimum | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares issuable based on threshold performance	0.00%
Maximum | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares issuable based on threshold performance	225.00%

Equity Incentive Plans - Status

Equity Incentive Plans - Status of the Company's Restricted Share Awards (Details)	3 Months Ended
	Mar. 31, 2020$ / sharesshares
Number of Shares Awarded
Beginning Balance (shares) | shares	71,102
Granted (in shares) | shares	103,581
Ending Balance (shares) | shares	174,683
Weighted Average Grant Date Fair Value
Beginning Balance (usd per share) | $ / shares	$ 15.36
Granted (in dollars per share) | $ / shares	15.81
Ending Balance (usd per share) | $ / shares	$ 15.63

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	$ 1,061,443	$ 1,138,352
Trading securities	8,388	11,222
Impaired loans	4,208	4,942
Measured on a recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	1,061,443	1,138,352
Trading securities	8,388	11,222
Equity securities	374	250
Total	1,070,205	1,149,824
Measured on a recurring basis | Mortgage-backed securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	934,498	973,127
Measured on a recurring basis | Pass-through certificates, GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	310,869	329,407
Measured on a recurring basis | REMICs, GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	623,580	643,667
Measured on a recurring basis | Non-GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	49	53
Measured on a recurring basis | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	279	299
Measured on a recurring basis | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	126,666	164,926
Measured on a recurring basis | Other debt obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	126,945	165,225
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]
Debt securities available-for-sale	0	0
Trading securities	8,388	11,222
Equity securities	374	250
Total	8,762	11,472
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	0	0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pass-through certificates, GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	0	0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | REMICs, GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities 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]
Debt securities 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]
Debt securities 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]
Debt securities available-for-sale	0	0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other debt obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	0	0
Measured on a recurring basis | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	1,061,443	1,138,352
Trading securities	0	0
Equity securities	0	0
Total	1,061,443	1,138,352
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	934,498	973,127
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Pass-through certificates, GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	310,869	329,407
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | REMICs, GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	623,580	643,667
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]
Debt securities available-for-sale	49	53
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]
Debt securities available-for-sale	279	299
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]
Debt securities available-for-sale	126,666	164,926
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Other debt obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	126,945	165,225
Measured on a recurring basis | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	0	0
Trading securities	0	0
Equity securities	0	0
Total	0	0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	0	0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Pass-through certificates, GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	0	0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | REMICs, GSE
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities 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]
Debt securities 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]
Debt securities 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]
Debt securities available-for-sale	0	0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Other debt obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	0	0
Measured on a non-recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	4,208	4,942
Measured on a non-recurring basis | Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	4,194	4,927
Measured on a non-recurring basis | Real Estate | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	4,143	4,871
Measured on a non-recurring basis | Real Estate | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	22	26
Measured on a non-recurring basis | Real Estate | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	29	30
Measured on a non-recurring basis | Commercial and Industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	14	15
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]
Total	0	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | 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) | Real Estate | 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) | Real Estate | 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) | Real Estate | 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]
Impaired 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]
Total	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | 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) | Real Estate | 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) | Real Estate | 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) | Real Estate | 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]
Impaired 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]
Total	4,208	4,942
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	4,194	4,927
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real Estate | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	4,143	4,871
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real Estate | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	22	26
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real Estate | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	29	30
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]
Impaired loans	$ 14	$ 15

Fair Value Measurements - Quali

Fair Value Measurements - Qualitative Information for Level 3 Assets Measured at Fair Value on a Non-Recurring Basis (Details) $ in Thousands	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	$ 4,208	$ 4,942
Appraisals | Discount for costs to sell
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, input	0.070	0.070
Appraisals | Discount for quick sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, input	0.100	0.100
Discounted cash flows | Interest rates | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, input	0.0413	0.0413
Discounted cash flows | Interest rates | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, input	0.0625	0.0625

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Impaired loans held-for-investment and held-for-sale with outstanding principal balances	$ 6,700		$ 7,000
Estimated fair value of impaired loans held-for-investment and held-for-sale	4,200		$ 4,900
Increase (decrease) in net impairment charges	79	$ 94
Net recoveries (charge offs)	$ 90	$ 70

Fair Value Measurements - Estim

Fair Value Measurements - Estimated Fair Values of the Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financial assets:
Trading securities	$ 8,388	$ 11,222
Debt securities available-for-sale	1,061,443	1,138,352
Debt securities held-to-maturity	9,002	8,886
Financial liabilities:
Equity securities not been classified in the fair value	3,100	3,100
Carrying Value
Financial assets:
Cash and cash equivalents	114,699	147,818
Trading securities	8,388	11,222
Debt securities available-for-sale	1,061,443	1,138,352
Debt securities held-to-maturity	8,706	8,762
Equity securities	374	250
Federal Home Loan Bank of New York stock, at cost	29,855	39,575
Net loans held-for-investment	3,472,337	3,408,378
Derivative assets	1,072	79
Financial liabilities:
Deposits	3,485,546	3,408,233
Borrowed funds	716,357	857,004
Advance payments by borrowers for taxes and insurance	22,444	440,069
Derivative liabilities	1,075	79
Estimated Fair Value
Financial assets:
Cash and cash equivalents	114,699	147,818
Trading securities	8,388	11,222
Debt securities available-for-sale	1,061,443	1,138,352
Debt securities held-to-maturity	9,002	8,886
Equity securities	374	250
Federal Home Loan Bank of New York stock, at cost	29,855	39,575
Net loans held-for-investment	3,479,488	3,482,804
Derivative assets	1,072	79
Financial liabilities:
Deposits	3,495,318	3,412,414
Borrowed funds	733,159	862,980
Advance payments by borrowers for taxes and insurance	22,444	440,069
Derivative liabilities	1,075	79
Estimated Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	114,699	147,818
Trading securities	8,388	11,222
Debt securities available-for-sale	0	0
Debt securities held-to-maturity	0	0
Equity securities	374	250
Federal Home Loan Bank of New York stock, at cost	0	0
Net loans held-for-investment	0	0
Derivative assets	0	0
Financial liabilities:
Deposits	0	0
Borrowed funds	0	0
Advance payments by borrowers for taxes and insurance	0	0
Derivative liabilities	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	1,061,443	1,138,352
Debt securities held-to-maturity	9,002	8,886
Equity securities	0	0
Federal Home Loan Bank of New York stock, at cost	29,855	39,575
Net loans held-for-investment	0	0
Derivative assets	1,072	79
Financial liabilities:
Deposits	3,495,318	3,412,414
Borrowed funds	733,159	862,980
Advance payments by borrowers for taxes and insurance	22,444	440,069
Derivative liabilities	1,075	79
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	3,479,488	3,482,804
Derivative assets	0	0
Financial liabilities:
Deposits	0	0
Borrowed funds	0	0
Advance payments by borrowers for taxes and insurance	0	0
Derivative liabilities	$ 0	$ 0

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 4,551	$ 8,771
Weighted average shares outstanding-basic (shares)	46,791,768	46,940,903
Effect of non-vested restricted stock and stock options outstanding (shares)	191,698	347,257
Weighted average shares outstanding-diluted (shares)	46,983,466	47,288,160
Earnings per share-basic (usd per share)	$ 0.10	$ 0.19
Earnings per share-diluted (usd per share)	$ 0.10	$ 0.19
Anti-dilutive shares (shares)	1,001,828	1,075,747

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 41,473	$ 39,504
Operating lease liabilities	$ 45,932	$ 44,069
Minimum
Lessee, Lease, Description [Line Items]
Term of lease	6 months
Renewal term	5 years
Maximum
Lessee, Lease, Description [Line Items]
Term of lease	35 years 3 months
Renewal term	10 years

Leases - Supplemental Lease Inf

Leases - Supplemental Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease cost	$ 1,439	$ 1,466
Variable lease cost	544	778
Net lease cost	1,983	2,244
Cash paid for amounts included in measurement of operating lease liabilities	1,545	1,327
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 3,028	$ 1,013
Weighted average remaining lease term	12 years 8 months 15 days	13 years 18 days
Weighted average discount rate	3.59%	3.60%

Leases - Lease Payments Obligat

Leases - Lease Payments Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Leases [Abstract]
2020	$ 4,719
2021	5,919
2022	5,311
2023	5,272
2024	4,935
Thereafter	33,230
Total lease payments	59,386
Less: imputed interest	13,454
Present value of lease liabilities	$ 45,932	$ 44,069

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total fees and service charges for customer services	$ 1,120	$ 1,140
Income on bank owned life insurance	876	896
(Losses) gains on available-for-sale debt securities, net	(13)	155
(Losses) gains on trading securities, net	(1,992)	1,086
Swap income	76	0
Other	41	37
Total non-interest income	108	3,314
Service charges
Disaggregation of Revenue [Line Items]
Total fees and service charges for customer services	753	782
ATM and card interchange fees
Disaggregation of Revenue [Line Items]
Total fees and service charges for customer services	304	301
Investment fees
Disaggregation of Revenue [Line Items]
Total fees and service charges for customer services	$ 63	$ 57

Derivatives (Details)

Derivatives (Details) - Interest Rate Swap	3 Months Ended
	Mar. 31, 2020USD ($)instrument	Dec. 31, 2019USD ($)instrument
Derivative [Line Items]
Number of derivative instruments held | instrument	2	1
Derivative, notional amount	$ 15,900,000	$ 12,000,000
Derivative assets (liabilities), at fair value	1,100,000	$ 79,000
Interest and fee income, derivative	$ 76,000

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements Adopted (Details)	Mar. 31, 2020
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Reporting unit, percentage of fair value in excess of carrying amount (less than)	27.00%

Subsequent Event (Details)

Subsequent Event (Details) $ in Thousands	May 07, 2020USD ($)loanrequestemployee	Dec. 31, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Subsequent Event [Line Items]
Principal amount of payment deferral loans			$ 3,472,337	$ 3,408,378
Subsequent Event | COVID-19
Subsequent Event [Line Items]
Number of loan modifications related to payments deferrals | loan	197
Principal amount of payment deferral loans	$ 321,300
Subsequent Event | COVID-19 | Principal Deferral (Interest Only)
Subsequent Event [Line Items]
Number of loan modifications related to payments deferrals | loan	63
Principal amount of payment deferral loans	$ 135,100
Subsequent Event | COVID-19 | Payment Deferral
Subsequent Event [Line Items]
Number of loan modifications related to payments deferrals | loan	134
Principal amount of payment deferral loans	$ 186,200
Subsequent Event | COVID-19
Subsequent Event [Line Items]
Number of loans approved | loan	750
Loans and leases receivable, loans in process	$ 102,900
Number of employees benefiting from the paycheck protection program | employee	10,000
Number of requests for payment relief | request	139
Loans and leases receivable, potential loans in process	$ 143,500
Percentage of loans relate to COVID-19	13.30%
Forecast | Subsequent Event | COVID-19
Subsequent Event [Line Items]
Loan processing fees		$ 3,700