Northfield Bancorp, Inc. (NFBK) 10-Q 9 Aug 21 2021 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2021	Jul. 31, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
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	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		50,805,455
Entity Central Index Key	0001493225
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
ASSETS:
Cash and due from banks	$ 18,681	$ 16,115
Interest-bearing deposits in other financial institutions	174,503	71,429
Total cash and cash equivalents	193,184	87,544
Trading securities	12,743	12,291
Debt securities available-for-sale	1,097,423	1,264,805
Debt securities held-to-maturity, at amortized cost, (estimated fair value of $6,703 at June 30, 2021, and $7,574 at December 31, 2020, and no allowance for credit losses at June 30, 2021)	6,417	7,234
Equity securities	219	253
Loans held-for-sale	0	19,895
Total Loans held-for-investment, net	3,817,273	3,823,238
Less: allowance for loan losses	(39,493)	(37,607)
Net loans held-for-investment	3,777,780	3,785,631
Accrued interest receivable	14,521	14,690
Bank-owned life insurance	163,628	161,924
Federal Home Loan Bank (“FHLB”) of New York stock, at cost	24,508	28,641
Operating lease right-of-use assets	34,574	36,741
Premises and equipment, net	27,268	28,188
Goodwill	41,012	41,320
Other assets	33,633	25,387
Total assets	5,426,910	5,514,544
LIABILITIES:
Deposits	4,108,269	4,076,551
Securities sold under agreements to repurchase	50,000	75,000
FHLB advances and other borrowings	420,329	516,789
Operating lease liabilities	40,721	42,734
Advance payments by borrowers for taxes and insurance	24,203	19,677
Accrued expenses and other liabilities	30,178	29,812
Total liabilities	4,673,700	4,760,563
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, 64,770,875 shares issued at June 30, 2021 and December 31, 2020, 50,843,651 and 52,209,897 outstanding at June 30, 2021, and December 31, 2020, respectively	648	648
Additional paid-in-capital	589,664	590,506
Unallocated common stock held by employee stock ownership plan	(18,040)	(18,529)
Retained earnings	361,638	338,093
Accumulated other comprehensive income	10,455	13,160
Treasury stock at cost: 13,927,224 and 12,560,978 shares at June 30, 2021 and December 31, 2020, respectively	(191,155)	(169,897)
Total stockholders’ equity	753,210	753,981
Total liabilities and stockholders’ equity	$ 5,426,910	$ 5,514,544

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Debt securities available-for-sale, allowance for credit loss	$ 0
Debt securities held-to-maturity	6,703	$ 7,574
Debt securities held-to-maturity, allowance for credit loss	$ 0
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)	64,770,875	64,770,875
Common stock, shares outstanding (shares)	50,843,651	52,209,897
Treasury stock, shares (shares)	13,927,224	12,560,978

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest income:
Loans	$ 39,699	$ 35,343	$ 80,976	$ 70,680
Mortgage-backed securities	2,682	4,304	5,641	9,926
Other securities	484	777	908	1,801
FHLB of New York dividends	336	456	706	1,033
Deposits in other financial institutions	35	31	72	203
Total interest income	43,236	40,911	88,303	83,643
Interest expense:
Deposits	1,671	7,473	3,541	16,752
Borrowings	2,878	3,208	5,899	6,728
Total interest expense	4,549	10,681	9,440	23,480
Net interest income	38,687	30,230	78,863	60,163
(Credit) provision for loan losses	(3,701)	1,921	(6,075)	10,104
Net interest income after provision for loan losses	42,388	28,309	84,938	50,059
Non-interest income:
Fees and service charges for customer services	1,327	666	2,524	1,786
Income on bank-owned life insurance	857	865	1,705	1,741
Gains on available-for-sale debt securities, net	509	73	606	60
Gains (losses) on trading securities, net	807	1,626	1,171	(366)
Gains on sales of loans	1,401	665	1,401	665
Other	15	343	145	460
Total non-interest income	4,916	4,238	7,552	4,346
Non-interest expense:
Compensation and employee benefits	10,806	10,444	21,338	17,733
Occupancy	3,500	3,018	7,201	6,078
Furniture and equipment	442	349	879	682
Data processing	1,798	1,612	3,430	3,072
Professional fees	832	1,045	1,738	2,154
Advertising	684	343	1,149	1,161
Federal Deposit Insurance Corporation insurance	346	216	721	216
Other	1,463	828	2,978	2,441
Total non-interest expense	19,871	17,855	39,434	33,537
Income before income tax expense	27,433	14,692	53,056	20,868
Income tax expense	7,639	3,899	14,585	5,524
Net income	$ 19,794	$ 10,793	$ 38,471	$ 15,344
Net income per common share:
Basic (usd per share)	$ 0.40	$ 0.23	$ 0.78	$ 0.33
Diluted (usd per share)	$ 0.40	$ 0.23	$ 0.78	$ 0.33
Unrealized (losses) gains on debt securities available-for-sale:
Net unrealized holding (losses) gains	$ (2,006)	$ 5,603	$ (3,150)	$ 13,913
Less: reclassification adjustment for net gains included in net income	(509)	(73)	(606)	(60)
Net unrealized (losses) gains	(2,515)	5,530	(3,756)	13,853
Income tax benefit (expense) related to net unrealized holding (losses) gains on debt securities available-for-sale	560	(1,568)	881	(3,894)
Income tax expense (benefit) related to reclassification adjustment for (gains) losses included in net income	143	20	170	17
Other comprehensive (loss) income, net of tax	(1,812)	3,982	(2,705)	9,976
Comprehensive income	$ 17,982	$ 14,775	$ 35,766	$ 25,320

Consolidated Statements of Chan

Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common StockCumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in Capital	Additional Paid-in CapitalCumulative Effect, Period of Adoption, Adjusted Balance	Unallocated Common Stock Held by the Employee Stock Ownership Plan	Unallocated Common Stock Held by the Employee Stock Ownership PlanCumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Retained EarningsCumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (loss) Net of tax	Accumulated Other Comprehensive Income (loss) Net of taxCumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury StockCumulative Effect, Period of Adoption, Adjusted Balance
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	15,344									15,344
Other comprehensive income (loss), net of tax	9,976												9,976
ESOP shares allocated or committed to be released	773					277		496
Stock compensation expense	881					881
Issuance of restricted stock (in shares)				83,744
Restricted stock issuance	0					(1,145)									1,145
Exercise of stock options, net (shares)				13,000
Exercise of stock options, net	175					(4)									179
Cash dividends declared and paid										(10,319)
Repurchase of treasury stock (in shares)				(8,714)
Repurchase of treasury stock	(107)														(107)
Ending Balance (shares) at Jun. 30, 2020				49,263,377
Ending Balance at Jun. 30, 2020	712,576			$ 609		548,495		(19,244)		327,606			14,675		(159,565)
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]
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate201613Member
Ending Balance (shares) at Dec. 31, 2020				52,209,897	52,209,897
Ending Balance at Dec. 31, 2020	$ 753,981	$ (3,087)	$ 750,894	$ 648	$ 648	590,506	$ 590,506	(18,529)	$ (18,529)	338,093	$ (3,087)	$ 335,006	13,160	$ 13,160	(169,897)	$ (169,897)
Beginning Balance (shares) at Mar. 31, 2020				49,291,928
Beginning Balance at Mar. 31, 2020	702,316			$ 609		547,712		(19,492)		321,981			10,693		(159,187)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,793									10,793
Other comprehensive income (loss), net of tax	3,982												3,982
ESOP shares allocated or committed to be released	327					79		248
Stock compensation expense	433					433
Restricted stock forfeitures (in shares)				(19,837)
Restricted stock forfeitures	0					271									(271)
Cash dividends declared and paid	(5,168)									(5,168)
Repurchase of treasury stock (in shares)				(8,714)
Repurchase of treasury stock	(107)														(107)
Ending Balance (shares) at Jun. 30, 2020				49,263,377
Ending Balance at Jun. 30, 2020	712,576			$ 609		548,495		(19,244)		327,606			14,675		(159,565)
Beginning Balance (shares) at Dec. 31, 2020				52,209,897	52,209,897
Beginning Balance at Dec. 31, 2020	753,981	$ (3,087)	$ 750,894	$ 648	$ 648	590,506	$ 590,506	(18,529)	$ (18,529)	338,093	$ (3,087)	$ 335,006	13,160	$ 13,160	(169,897)	$ (169,897)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	38,471									38,471
Other comprehensive income (loss), net of tax	(2,705)												(2,705)
ESOP shares allocated or committed to be released	903					414		489
Stock compensation expense	504					504
Issuance of restricted stock (in shares)				147,315
Restricted stock issuance	0					(1,821)									1,821
Restricted stock forfeitures (in shares)				(3,237)
Restricted stock forfeitures	$ 0					48									(48)
Exercise of stock options, net (shares)	138,605			132,770
Exercise of stock options, net						13				1,815					1,802
Cash dividends declared and paid										(11,839)
Repurchase of treasury stock (in shares)				(1,643,094)
Repurchase of treasury stock										(24,833)					(24,833)
Ending Balance (shares) at Jun. 30, 2021				50,843,651
Ending Balance at Jun. 30, 2021	$ 753,210			$ 648		589,664		(18,040)		361,638			10,455		(191,155)
Beginning Balance (shares) at Mar. 31, 2021				51,668,197
Beginning Balance at Mar. 31, 2021	754,565			$ 648		589,188		(18,286)		348,236			12,267		(177,488)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,794									19,794
Other comprehensive income (loss), net of tax	(1,812)												(1,812)
ESOP shares allocated or committed to be released	491					245		246
Stock compensation expense	260					260
Restricted stock forfeitures (in shares)				(1,555)
Restricted stock forfeitures	0					22									(22)
Exercise of stock options, net (shares)				77,780
Exercise of stock options, net	1,007					(51)									1,058
Cash dividends declared and paid	(6,392)									(6,392)
Repurchase of treasury stock (in shares)				(900,771)
Repurchase of treasury stock	(14,703)														(14,703)
Ending Balance (shares) at Jun. 30, 2021				50,843,651
Ending Balance at Jun. 30, 2021	$ 753,210			$ 648		$ 589,664		$ (18,040)		$ 361,638			$ 10,455		$ (191,155)

Consolidated Statements of Ch_2

Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Stockholders' Equity [Abstract]
Dividends declared per share (usd per share)	$ 0.13	$ 0.11	$ 0.24	$ 0.22
Dividends paid per share (usd per share)	0.13	0.11	0.24	0.22
Treasury stock repurchased cost per share (usd per share)	$ 16.32	$ 12.24	$ 15.11	$ 12.24

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Statement of Cash Flows [Abstract]
Net income	$ 38,471	$ 15,344
Adjustments to reconcile net income to net cash provided by operating activities:
(Credit) provision for loan losses	(6,075)	10,104
ESOP and stock compensation expense	1,407	1,654
Depreciation	1,945	1,612
Amortization of premiums, and deferred loan costs, net of (accretion) discounts, and deferred loan fees	621	1,900
Amortization of intangible assets	101	110
Amortization of operating lease right-of-use assets	2,167	2,166
Income on bank-owned life insurance	(1,705)	(1,741)
Net gain on sale of loans held-for-sale	(1,401)	(665)
Gains on available-for-sale debt securities, net	(606)	(60)
(Gains) losses on trading securities, net	(1,171)	366
Net sales of trading securities	719	762
Decrease in accrued interest receivable	169	1,584
Increase in other assets	(10,020)	(3,325)
Increase (decrease) in accrued expenses and other liabilities	366	(3,691)
Net cash provided by operating activities	24,988	26,120
Cash flows from investing activities:
Net increase in loans receivable	(117,546)	(200,613)
Proceeds from sale of loans held-for-sale	151,559	48,165
Purchases of FHLB of New York stock	(220)	(10,497)
Redemptions of FHLB of New York stock	4,353	20,610
Purchases of debt securities available-for-sale	(213,761)	(132,052)
Purchases of equity securities	0	(24)
Principal payments and maturities on debt securities available-for-sale	280,050	232,838
Principal payments and maturities on debt securities held-to-maturity	788	106
Proceeds from sale of debt securities available-for-sale	95,472	12,623
Proceeds from sale of equity securities	34	2,035
Proceeds from bank-owned life insurance	1,021	2,716
Purchases and improvements of premises and equipment	(1,025)	(1,223)
Net cash provided by (used in) investing activities	200,725	(25,316)
Cash flows from financing activities:
Net increase in deposits	31,718	213,425
Dividends paid	(11,839)	(10,319)
Exercise of stock options	1,815	175
Purchase of treasury stock	(24,833)	(107)
Increase in advance payments by borrowers for taxes and insurance	4,526	(163)
Proceeds from securities sold under agreements to repurchase and other borrowings	265	370,267
Repayments related to securities sold under agreements to repurchase and other borrowings	(121,725)	(611,000)
Net cash used in financing activities	(120,073)	(37,722)
Net increase (decrease) in cash and cash equivalents	105,640	(36,918)
Cash and cash equivalents at beginning of period	87,544	147,818
Cash and cash equivalents at end of period	193,184	110,900
Cash paid during the period for:
Interest	9,833	24,845
Income taxes	19,100	7,375
Non-cash transactions:
Loan charge-offs, net	2,392	291
Transfer of loans held-for-investment to loans-held-for-sale at fair value	131,883	47,500
Transfer of loans held-for-sale at fair value to loans held-for-investment	1,612	0
Transfer of loans held-for-investment to other real estate owned	100	0
Right-of-use assets obtained in exchange for new lease liabilities	$ 0	$ 3,028

Consolidated Financial Statemen

Consolidated Financial Statements	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidated Financial Statements	Consolidated Financial Statements Basis of Presentation The consolidated financial statements are comprised of the accounts of Northfield Bancorp, Inc. (and its wholly owned subsidiaries, Northfield Investments, Inc. and Northfield Bank (the “ Bank ” ), and the Bank’s wholly-owned 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 balance sheets and the consolidated statements of comprehensive income for the unaudited periods presented have been included. The results of operations and other data presented for the three and six months ended June 30, 2021 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2021 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 balance sheets and the consolidated statements of comprehensive income 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-deteriorated (“PCD”, or, previously, 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, 2020, as filed with the SEC. Loans and Allowance for Credit Losses On January 1, 2021, the Company adopted ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): “Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”) which replaces the incurred loss methodology with an expected loss methodology that is referred to as the current expected credit loss (“CECL”) methodology. The Company used the modified retrospective method for all financial assets measured at amortized cost and off-balance sheet credit exposures. The adoption of the new standard resulted in the Company recording an increase in the allowance for credit losses of $11.1 million, comprised of $10.4 million and $737,000 for loans and unfunded commitments, respectively, including $6.8 million related to PCD loans. For PCD loans, the allowance for credit losses recorded is recognized through a gross-up that increases the amortized cost basis of loans with a corresponding increase to the allowance for credit losses, and therefore results in no impact to shareholders' equity. The remaining increase to the allowance for credit losses of $4.3 million was offset in stockholders' equity and deferred taxes. As a result of adopting CECL, the Company's prior distinction between the originated loan portfolio and the non-PCD acquired loan portfolio is no longer necessary. Results for reporting periods beginning after January 1, 2021 are presented under CECL, while prior period amounts continue to be recorded with previously applicable U.S. GAAP. Further information regarding the impact of CECL can be found in Note 6 - Loans Note 7 - Allowance for Loan Losses Note 15 - Recent Accounting Pronouncements Adopted COVID-19 On March 13, 2020, the Coronavirus Disease (COVID-19) pandemic was declared a national emergency in the United States. The spread of COVID-19 has negatively impacted the national and local economy, disrupted supply chains and increased unemployment levels. While vaccination rollouts, government stimulus, continued business re-openings and increased consumer activity (as social restrictions have eased) led to a sharp rebound in economic activity during the first six months of 2021, there are substantial variations in the pace of recovery across and within corporate sectors and economic activity both on a national level and in the markets we serve has not yet returned to pre-pandemic levels. In addition, the rise in cases of the new COVID-19 delta variant may threaten to undermine the economic recovery. The Company is committed to supporting its customers, employees and communities and continues to update protocols to adapt to the changing environment. The Company's bank branches offer drive through services without interruption, while lobbies are fully open or accessible to clients via appointment. The Company continues to provide secure and efficient remote and in-person work options for back office employees. 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 Board of Governors of the Federal Reserve System, and other federal banking agencies have implemented or may implement. The CARES Act also includes a provision that permits a financial institution to elect to suspend temporarily TDR accounting under current U.S. generally accepted accounting principles (“U.S. GAAP”) in certain circumstances. 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 relief was further extended by the Consolidated Appropriations Act to the earlier of January 1, 2022 or 60 days after the date of termination of the national emergency. The relief provided 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. In response to the COVID-19 pandemic and its economic impact to customers, the Company introduced a short-term modification program in March 2020 that provided temporary payment relief to those borrowers directly impacted by COVID-19. The program allows for a deferral of payments typically for 90 days, which may be extended for additional 90 day periods. See Note 6 - Loans A provision in the CARES Act provides for a loan guarantee program called the Paycheck Protection Program (“PPP”), which provides 100% federally guaranteed loans for small businesses to cover payroll, utilities, rent and interest. These small business loans are fully guaranteed by the Small Business Administration (“SBA”) and 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 June 30, 2021, the Company had originated over 2,300 PPP loans to new and existing customers, totaling approximately $232.2 million. PPP provides for lender processing fees that range from 1% to 5% of the final disbursement made to individual borrowers. As of June 30, 2021, we have received cumulative loan processing fees of $9.5 million, of which $4.7 million has been recognized in earnings through June 30, 2021, including $2.8 million recognized in the six months ended June 30, 2021. The remaining unearned fees will be recognized in income over the remaining term of the loans. PPP loans are fully guaranteed by the SBA and are therefore excluded from the allowance for loan and lease losses calculation. There were 1,453 PPP loans totaling $132.7 million in our loan portfolio at June 30, 2021. The Company continues to maintain a strong liquidity and capital position as a buffer to protect against the economic uncertainties presented by the COVID-19 pandemic. As of June 30, 2021, both the Company and the Bank's capital ratios were in excess of regulatory requirements and are both 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.

Business Combinations

Business Combinations	6 Months Ended
	Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Business Combinations	Business Combinations On July 1, 2020, the Company completed its acquisition of VSB Bancorp, Inc. (“Victory”), parent company of Victory State Bank, in a stock transaction, which after purchase accounting adjustments, added $402.8 million to total assets, including $180.4 million to loans, and $354.6 million to deposits, and six branch offices in Staten Island, New York. Under the terms of the merger agreement, each share of Victory common stock was exchanged for 2.0463 shares of Northfield common stock with fractional shares paid out in cash. The transaction was accounted for under the acquisition method of accounting. Under this method of accounting, the purchase price has been allocated to the respective assets acquired and liabilities assumed based upon their estimated fair values, net of tax, as of July 1, 2020, and results of operations have been included in the Company's consolidated statements of income from that date forward. The excess of consideration paid over the fair value of the net assets acquired has been recorded as goodwill. The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of acquisition for Victory (in thousands): July 1, 2020 Fair Value Total Purchase Price $ 41,173 Assets acquired: Cash and cash equivalents $ 72,875 Debt securities available for sale 126,931 Loans 180,431 Accrued interest receivable 1,415 Bank-owned life insurance 5,714 Premises and equipment 7,789 Other assets 5,010 Total assets acquired 400,165 Liabilities assumed: Deposits 354,592 Other liabilities 7,001 Total liabilities assumed 361,593 Net assets acquired $ 38,572 Goodwill recorded in the merger $ 2,601 The calculation of goodwill is subject to change for up to one year after the date of acquisition as additional information that existed as of the acquisition date estimates and uncertainties become available. As of June 30, 2021, the Company finalized its review of the acquired assets and liabilities and recorded an adjustment to the carrying value of goodwill and a corresponding adjustment to deferred tax assets of $304,000. Fair Value Measurement of Assets Assumed and Liabilities Assumed Described below are the methods used to determine the fair value of the significant assets acquired and liabilities assumed in the Victory acquisition. Cash and Cash Equivalents. The estimated fair values of cash and cash equivalents approximate their stated face amounts, as these financial instruments are either due on demand or have short-term maturities. Debt Securities Available-for-Sale. The estimated fair values of the securities were calculated utilizing Level 2 inputs. Prices for the securities were obtained from an independent nationally recognized third-party pricing service. Loans. The acquired loan portfolio was valued based on current guidance which defines fair value as the price that would be received to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. Level 3 inputs were utilized to value the portfolio and included the use of present value techniques employing cash flow estimates and the incorporated assumptions that marketplace participants would use in estimating fair values. In instances where reliable market information was not available, the Company used its own assumptions in an effort to determine reasonable fair value. Specifically, management utilized three separate fair value analyses which a market participant would employ in estimating the total fair value adjustment. The three separate fair valuation methodologies used were: 1) interest rate loan fair value analysis; 2) general credit fair value adjustment; and 3) specific credit fair value adjustment. To prepare the interest rate fair value analysis, loans were grouped by characteristics such as loan type, term, collateral and rate. Market rates for similar loans were obtained from various external data sources and reviewed by Company management for reasonableness. The average of these rates was used as the fair value interest rate a market participant would utilize. A present value approach was utilized to calculate the interest rate fair value adjustment. The general credit fair value adjustment was calculated using a two-part general credit fair value analysis: 1) expected credit losses; and 2) estimated fair value adjustment for qualitative factors. The expected credit losses were calculated using an average of historical losses of the acquired bank and industry bench mark loss rates observed for loans with similar underlying characteristics. The adjustment related to qualitative factors was impacted by general economic conditions and the risk related to lack of familiarity with the originator's underwriting process. To calculate the specific credit fair value adjustment, management reviewed the acquired loan portfolio for loans meeting the definition of an impaired loan with deteriorated credit quality. Loans meeting this definition were reviewed by comparing the contractual cash flows to expected collectible cash flows. The aggregate expected cash flows less the acquisition date fair value resulted in an accretable yield amount. The accretable yield amount will be recognized over the life of the loans on a level yield basis as an adjustment to yield. The following is a summary of the credit impaired loans acquired in the Victory acquisition as of the closing date (in thousands): July 1, 2020 Contractually required principal and interest $ 7,809 Contractual cash flows not expected to be collected (non-accretable discount) 3,315 Expected cash flows to be collected at acquisition 4,494 Interest component of expected cash flows (accretable yield) (599) Fair value of acquired loans $ 3,895 Leases. Five lease obligations were added as part of the acquisition, and the Company recorded a $2.5 million operating lease right-of-use asset and operating lease liability for these lease obligations.

Debt Securities Available-for-S

Debt Securities Available-for-Sale	6 Months Ended
	Jun. 30, 2021
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 June 30, 2021, and December 31, 2020 (in thousands): June 30, 2021 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value U.S. Government agency securities $ 2,758 $ — $ (4) $ 2,754 Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises ("GSEs") 221,513 8,640 (386) 229,767 Real estate mortgage investment conduits ("REMICs"): GSE 735,021 5,859 (502) 740,378 956,534 14,499 (888) 970,145 Other debt securities: Municipal bonds 77 1 — 78 Corporate bonds 123,678 815 (47) 124,446 123,755 816 (47) 124,524 Total debt securities available-for-sale $ 1,083,047 $ 15,315 $ (939) $ 1,097,423 December 31, 2020 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value U.S. Government agency securities $ 3,168 $ — $ (10) $ 3,158 Mortgage-backed securities: Pass-through certificates: GSE 270,867 10,720 (244) 281,343 REMICs: GSE 884,414 7,027 (476) 890,965 Non-GSE 4 — — 4 1,155,285 17,747 (720) 1,172,312 Other debt securities: Municipal bonds 122 1 — 123 Corporate bonds 87,319 1,099 — 88,418 Asset-backed securities 779 15 — 794 88,220 1,115 — 89,335 Total debt securities available-for-sale $ 1,246,673 $ 18,862 $ (730) $ 1,264,805 The following is a summary of the expected maturity distribution of debt securities available-for-sale, other than mortgage-backed securities, at June 30, 2021 (in thousands): Available-for-sale Amortized cost Estimated fair value Due in one year or less $ 35,282 $ 35,757 Due after one year through five years 73,463 73,804 Due after five years through ten years 17,768 17,717 $ 126,513 $ 127,278 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 June 30, 2021, the fair value of debt securities available-for-sale that were pledged to secure borrowings and deposits was $557.0 million. For the three months ended June 30, 2021, the Company had gross proceeds of $89.6 million on sales of debt securities available-for-sale, with gross realized gains of $509,000 and no gross realized losses. For the six months ended June 30, 2021, the Company had gross proceeds of $95.5 million on sales and calls of debt securities available-for-sale, with gross realized gains of $606,000 and no gross realized losses. For the three months ended June 30, 2020, the Company had gross proceeds of $12.6 million on sales of debt securities available-for-sale, with gross realized gains of $74,000 related to sales of securities and gross realized losses of $1,000 related to calls of securities. For the six months ended June 30, 2020, the Company had gross proceeds of $12.6 million on sales of debt securities available-for-sale, with gross realized gains of $74,000 related to sales of securities and gross realized losses of $14,000 related to calls of securities. The Company recognized net gains of $807,000 and $1.2 million on its trading securities portfolio during the three and six months ended June 30, 2021, respectively. During the three and six months ended June 30, 2020, the Company recognized net gains of $1.6 million and net losses of $366,000, respectively, on its trading securities portfolio. 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 June 30, 2021, and December 31, 2020, were as follows (in thousands): June 30, 2021 Less than 12 months 12 months or more Total Unrealized Estimated Unrealized Estimated Unrealized Estimated losses fair value losses fair value losses fair value U.S. Government agency securities $ (4) $ 2,754 $ — $ — $ (4) $ 2,754 Mortgage-backed securities: Pass-through certificates: GSE (378) 31,540 (8) 383 (386) 31,923 REMICs: GSE (502) 124,255 — — (502) 124,255 Other debt securities: Corporate bonds (47) 14,964 — — (47) 14,964 Total $ (931) $ 173,513 $ (8) $ 383 $ (939) $ 173,896 December 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 U.S. Government agency securities $ (10) $ 3,158 $ — $ — $ (10) $ 3,158 Mortgage-backed securities: Pass-through certificates: GSE (233) 28,419 (11) 459 (244) 28,878 REMICs: GSE (476) 210,569 — — (476) 210,569 Total $ (719) $ 242,146 $ (11) $ 459 $ (730) $ 242,605 The Company held nine pass-through mortgage-backed securities issued or guaranteed by GSEs that were in a continuous unrealized loss position of twelve months or greater at June 30, 2021. There were 17 pass-through mortgage-backed securities issued or guaranteed by GSEs, 41 REMIC mortgage-backed securities issued or guaranteed by GSEs, two corporate bonds and one U.S. Government agency security that were in an unrealized loss position of less than twelve months at June 30, 2021. All securities referred to above were rated investment grade at June 30, 2021. Available for sale debt securities in unrealized loss positions are evaluated for impairment related to credit losses on a quarterly basis. In performing an assessment of whether any decline in fair value is due to a credit loss, the Company considers the extent to which the fair value is less than the amortized cost, changes in credit ratings, any adverse economic conditions, as well as all relevant information at the individual security level such as credit deterioration of the issuer or collateral underlying the security. In assessing the impairment, the Company compares the present value of cash flows expected to be collected with the amortized cost basis of the security. If it is determined that the decline in fair value was due to credit losses, an allowance for credit losses is recorded, limited to the amount the fair value is less than amortized cost basis. The Company did not recognize any allowance for credit losses on its available-for-sale debt securities during the three and six months ended June 30, 2021. The non-credit related decrease in the fair value, such as a decline due to changes in market interest rates, is recorded in other comprehensive income, net of tax. The Company also assesses the intent to sell the securities (as well as the likelihood of a near-term recovery). If the Company intends to sell an available for sale debt security or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis, the debt security is written down to its fair value and the write down is charged to the debt security’s fair value at the reporting date with any incremental impairment reported in earnings. The Company has made the accounting policy election to exclude accrued interest receivable on available-for-sale securities from the estimate of credit losses. Accrued interest receivable associated with debt securities available-for-sale totaling $1.9 million at June 30, 2021 is reported in accrued interest receivable on the consolidated balance sheet.

Debt Securities Held-to-Maturit

Debt Securities Held-to-Maturity	6 Months Ended
	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Debt Securities Held-to-Maturity	Debt Securities Held-to-Maturity The following is a summary of mortgage-backed securities held-to-maturity at June 30, 2021 and December 31, 2020 (in thousands): June 30, 2021 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSE $ 6,417 $ 286 $ — $ 6,703 Total securities held-to-maturity $ 6,417 $ 286 $ — $ 6,703 December 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSE $ 7,234 $ 340 $ — $ 7,574 Total securities held-to-maturity $ 7,234 $ 340 $ — $ 7,574 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 six months ended June 30, 2021 or June 30, 2020. At June 30, 2021, debt securities held-to-maturity with a carrying value of $6.4 million were pledged to secure borrowings and deposits. At June 30, 2021 and December 31, 2020, there were no debt securities held-to-maturity in an unrealized loss position. The Company's held-to-maturity securities are residential mortgage-backed securities issued by Ginnie Mae, Freddie MAC and Fannie Mae, and it is expected that the securities will not be settled at prices less than the amortized cost bases of the securities as such securities are backed by the full faith and credit of and/or guaranteed by the U.S. Government. Accordingly, no allowance for credit losses has been recorded for these securities. The Company has made the accounting policy election to exclude accrued interest receivable on held-to-maturity securities from the estimate of credit losses. Accrued interest receivable associated with held-to-maturity securities totaling $19,400 at June 30, 2021 is reported in accrued interest receivable on the consolidated balance sheet.

Equity Securities

Equity Securities	6 Months Ended
	Jun. 30, 2021
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 June 30, 2021, and December 31, 2020 (in thousands): June 30, 2021 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value U.S. Government agency securities $ 2,758 $ — $ (4) $ 2,754 Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises ("GSEs") 221,513 8,640 (386) 229,767 Real estate mortgage investment conduits ("REMICs"): GSE 735,021 5,859 (502) 740,378 956,534 14,499 (888) 970,145 Other debt securities: Municipal bonds 77 1 — 78 Corporate bonds 123,678 815 (47) 124,446 123,755 816 (47) 124,524 Total debt securities available-for-sale $ 1,083,047 $ 15,315 $ (939) $ 1,097,423 December 31, 2020 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value U.S. Government agency securities $ 3,168 $ — $ (10) $ 3,158 Mortgage-backed securities: Pass-through certificates: GSE 270,867 10,720 (244) 281,343 REMICs: GSE 884,414 7,027 (476) 890,965 Non-GSE 4 — — 4 1,155,285 17,747 (720) 1,172,312 Other debt securities: Municipal bonds 122 1 — 123 Corporate bonds 87,319 1,099 — 88,418 Asset-backed securities 779 15 — 794 88,220 1,115 — 89,335 Total debt securities available-for-sale $ 1,246,673 $ 18,862 $ (730) $ 1,264,805 The following is a summary of the expected maturity distribution of debt securities available-for-sale, other than mortgage-backed securities, at June 30, 2021 (in thousands): Available-for-sale Amortized cost Estimated fair value Due in one year or less $ 35,282 $ 35,757 Due after one year through five years 73,463 73,804 Due after five years through ten years 17,768 17,717 $ 126,513 $ 127,278 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 June 30, 2021, the fair value of debt securities available-for-sale that were pledged to secure borrowings and deposits was $557.0 million. For the three months ended June 30, 2021, the Company had gross proceeds of $89.6 million on sales of debt securities available-for-sale, with gross realized gains of $509,000 and no gross realized losses. For the six months ended June 30, 2021, the Company had gross proceeds of $95.5 million on sales and calls of debt securities available-for-sale, with gross realized gains of $606,000 and no gross realized losses. For the three months ended June 30, 2020, the Company had gross proceeds of $12.6 million on sales of debt securities available-for-sale, with gross realized gains of $74,000 related to sales of securities and gross realized losses of $1,000 related to calls of securities. For the six months ended June 30, 2020, the Company had gross proceeds of $12.6 million on sales of debt securities available-for-sale, with gross realized gains of $74,000 related to sales of securities and gross realized losses of $14,000 related to calls of securities. The Company recognized net gains of $807,000 and $1.2 million on its trading securities portfolio during the three and six months ended June 30, 2021, respectively. During the three and six months ended June 30, 2020, the Company recognized net gains of $1.6 million and net losses of $366,000, respectively, on its trading securities portfolio. 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 June 30, 2021, and December 31, 2020, were as follows (in thousands): June 30, 2021 Less than 12 months 12 months or more Total Unrealized Estimated Unrealized Estimated Unrealized Estimated losses fair value losses fair value losses fair value U.S. Government agency securities $ (4) $ 2,754 $ — $ — $ (4) $ 2,754 Mortgage-backed securities: Pass-through certificates: GSE (378) 31,540 (8) 383 (386) 31,923 REMICs: GSE (502) 124,255 — — (502) 124,255 Other debt securities: Corporate bonds (47) 14,964 — — (47) 14,964 Total $ (931) $ 173,513 $ (8) $ 383 $ (939) $ 173,896 December 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 U.S. Government agency securities $ (10) $ 3,158 $ — $ — $ (10) $ 3,158 Mortgage-backed securities: Pass-through certificates: GSE (233) 28,419 (11) 459 (244) 28,878 REMICs: GSE (476) 210,569 — — (476) 210,569 Total $ (719) $ 242,146 $ (11) $ 459 $ (730) $ 242,605 The Company held nine pass-through mortgage-backed securities issued or guaranteed by GSEs that were in a continuous unrealized loss position of twelve months or greater at June 30, 2021. There were 17 pass-through mortgage-backed securities issued or guaranteed by GSEs, 41 REMIC mortgage-backed securities issued or guaranteed by GSEs, two corporate bonds and one U.S. Government agency security that were in an unrealized loss position of less than twelve months at June 30, 2021. All securities referred to above were rated investment grade at June 30, 2021. Available for sale debt securities in unrealized loss positions are evaluated for impairment related to credit losses on a quarterly basis. In performing an assessment of whether any decline in fair value is due to a credit loss, the Company considers the extent to which the fair value is less than the amortized cost, changes in credit ratings, any adverse economic conditions, as well as all relevant information at the individual security level such as credit deterioration of the issuer or collateral underlying the security. In assessing the impairment, the Company compares the present value of cash flows expected to be collected with the amortized cost basis of the security. If it is determined that the decline in fair value was due to credit losses, an allowance for credit losses is recorded, limited to the amount the fair value is less than amortized cost basis. The Company did not recognize any allowance for credit losses on its available-for-sale debt securities during the three and six months ended June 30, 2021. The non-credit related decrease in the fair value, such as a decline due to changes in market interest rates, is recorded in other comprehensive income, net of tax. The Company also assesses the intent to sell the securities (as well as the likelihood of a near-term recovery). If the Company intends to sell an available for sale debt security or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis, the debt security is written down to its fair value and the write down is charged to the debt security’s fair value at the reporting date with any incremental impairment reported in earnings. The Company has made the accounting policy election to exclude accrued interest receivable on available-for-sale securities from the estimate of credit losses. Accrued interest receivable associated with debt securities available-for-sale totaling $1.9 million at June 30, 2021 is reported in accrued interest receivable on the consolidated balance sheet.

Loans

Loans	6 Months Ended
	Jun. 30, 2021
Receivables [Abstract]
Loans	Loans On January 1, 2021, the Company adopted the CECL standard for measuring credit losses, which replaced the incurred loss methodology. As a result of adopting CECL, the Company combined its originated loan portfolio and the acquired loan portfolio into the respective portfolio segments. Other than to combine the originated and non-PCD acquired loan portfolios, the Company's portfolio segments and loan classes remain unchanged following the adoption of the CECL standard. Prior period disclosures have been revised to conform to current period presentation (by combining originated and acquired portfolio segments), however, the Company did not recast comparative financial information and that is still presented in accordance with previous applicable provisions of U.S. GAAP. The following table summarizes the Company’s loans held-for-investment (in thousands): June 30, December 31, 2021 2020 Real estate loans: Multifamily $ 2,496,613 $ 2,509,310 Commercial mortgage 735,303 716,973 One-to-four family residential mortgage 193,976 210,817 Home equity and lines of credit 99,814 91,126 Construction and land 63,125 74,318 Total real estate loans 3,588,831 3,602,544 Commercial and industrial loans (1) 209,580 194,352 Other loans 2,170 3,029 Total commercial and industrial and other loans 211,750 197,381 Deferred origination loan costs, net (2) — 4,795 Loans held-for-investment, net (excluding PCD/PCI) 3,800,581 3,804,720 PCD/PCI loans 16,692 18,518 Total Loans held-for-investment, net 3,817,273 3,823,238 Allowance for loan losses (39,493) (37,607) Net loans held-for-investment $ 3,777,780 $ 3,785,631 (1) Included in commercial and industrial loans at June 30, 2021 and December 31, 2020 are PPP loans totaling $132.7 million and $126.5 million, respectively. (2) Under CECL origination deferred fees, deferred fees on acquired loans, and purchase accounting adjustments in connection with loans acquired are included in loans by respective portfolio. The Company had no loans held-for-sale at June 30, 2021. At December 31, 2020, loans held-for-sale totaled $19.9 million. In addition to originating loans, the Company may acquire loans through portfolio purchases or acquisitions of other companies. Purchased loans that have evidence of more than insignificant credit deterioration since origination are deemed purchased credit deteriorated (“PCD”) loans. In accordance with ASU 2016-13, with its adoption of the CECL standard, the Company did not reassess whether previously recognized PCI loans accounted for under prior accounting guidance met the criteria of a PCD loan as of the date of adoption. All loans considered to be PCI prior to the adoption of CECL were converted to PCD upon adoption. For PCD loans, each loan pool is accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows. PCD loans totaled $16.7 million at June 30, 2021, as compared to $18.5 million of PCI loans at December 31, 2020. The majority of the PCD loan balance is attributable to those loans acquired as part of a Federal Deposit Insurance Corporation-assisted transaction. At June 30, 2021, PCD loans consisted of approximately 17% one-to-four family residential loans, 25% commercial real estate loans and 45% commercial and industrial loans, with the remaining balance in construction and home equity loans. At December 31, 2020, PCI loans consisted of approximately 22% one-to-four family residential loans, 23% commercial real estate loans and 40% commercial and industrial loans, with the remaining balance in home equity loans. Credit Quality Indicators 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 the time of origination (unless a current appraisal has been obtained as a result of the loan being deemed impaired). 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 table presents the Company’s loans held-for-investment, excluding PCD loans, by loan class, credit risk ratings and year of origination, at June 30, 2021 (in thousands): June 30, 2021 2021 2020 2019 2018 2017 Prior Revolving Loans Total Real Estate: Multifamily Pass $ 370,670 $ 548,666 $ 360,502 $ 323,853 $ 259,515 $ 617,290 $ 496 $ 2,480,992 Special Mention — — — — — 442 — 442 Substandard — — 4,681 1,609 — 8,889 — 15,179 Total multifamily 370,670 548,666 365,183 325,462 259,515 626,621 496 2,496,613 Commercial Pass 53,671 74,958 99,407 101,009 68,317 291,092 10,046 698,500 Special Mention — — 511 — 500 9,064 — 10,075 Substandard — — 9,653 310 2,390 11,007 3,368 26,728 Total commercial 53,671 74,958 109,571 101,319 71,207 311,163 13,414 735,303 One-to-four family residential Pass 2,405 9,483 12,488 15,294 12,669 134,622 616 187,577 Special Mention — — 467 — — 2,399 — 2,866 Substandard — — 526 — — 3,007 — 3,533 Total one-to-four family residential 2,405 9,483 13,481 15,294 12,669 140,028 616 193,976 Construction and land Pass — 1,570 1,396 535 2,611 3,589 52,317 62,018 Substandard — — — — — — 1,107 1,107 Total construction and land — 1,570 1,396 535 2,611 3,589 53,424 63,125 Home equity and lines of credit Pass 21,126 19,526 13,818 10,621 4,485 29,503 62 99,141 Special Mention — — — — — 304 — 304 Substandard — — 98 87 — 184 — 369 Total home equity and lines of credit 21,126 19,526 13,916 10,708 4,485 29,991 62 99,814 Total real estate loans 447,872 654,203 503,547 453,318 350,487 1,111,392 68,012 3,588,831 Commercial and industrial Pass 92,179 72,076 8,684 4,549 1,352 14,654 12,801 206,295 Special Mention — 72 160 238 145 283 — 898 Substandard — 490 324 711 — 862 — 2,387 Total commercial and industrial 92,179 72,638 9,168 5,498 1,497 15,799 12,801 209,580 Other Pass 1,808 181 26 44 5 103 — 2,167 Substandard — — — — — 3 — 3 Total other 1,808 181 26 44 5 106 — 2,170 Total loans held-for-investment, net $ 541,859 $ 727,022 $ 512,741 $ 458,860 $ 351,989 $ 1,127,297 $ 80,813 $ 3,800,581 The following table details the recorded investment of loans held-for-investment, excluding PCI loans, net of deferred fees and costs, by loan type and credit quality indicator at December 31, 2020 (in thousands): December 31, 2020 Real Estate Multifamily Commercial One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total Internal Risk Rating Pass $ 2,497,556 $ 667,568 $ 207,633 $ 74,351 $ 92,385 $ 189,372 $ 3,026 $ 3,731,891 Special Mention 458 20,422 2,456 — 311 498 — 24,145 Substandard 14,920 29,576 2,133 — 441 1,611 3 48,684 Total loans held-for-investment, net $ 2,512,934 $ 717,566 $ 212,222 $ 74,351 $ 93,137 $ 191,481 $ 3,029 $ 3,804,720 Past Due and Non-Accrual Loans Included in loans receivable held-for-investment 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 $8.1 million and $8.5 million at June 30, 2021, and December 31, 2020, 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. When an individual loan no longer demonstrates the similar credit risk characteristics as other loans within its current segment, the Company evaluates each for expected credit losses on an individual basis. All non-accrual loans $500,000 and above and all loans designated as troubled debt restructures (“TDRs”) are individually evaluated. The non-accrual amounts included in loans individually evaluated for impairment were $4.9 million and $5.5 million at June 30, 2021, and December 31, 2020, respectively. Loans on non-accrual status with principal balances less than $500,000, and therefore not individually evaluated for impairment, amounted to $3.2 million at June 30, 2021, and $3.0 million at December 31, 2020. Loans past due 90 days or more and still accruing interest were $731,000 at June 30, 2021, and $1.1 million at December 31, 2020, and consisted of loans that are considered well-secured and in the process of collection. The Company had no loans held-for-sale at June 30, 2021. At December 31, 2020, the Company had $19.9 million in loans held-for-sale. At December 31, 2020, the loans held-for-sale were comprised of commercial real estate and multifamily loans, primarily accommodation (hotel or motel) loans that were modified in the form of interest and/or principal payment deferrals due to COVID-19 related hardships, and had not returned to contractual payments after 180 days of relief. The sale of these loans was completed in March 2021. 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 June 30, 2021, and December 31, 2020, excluding PCD/PCI loans (in thousands): June 30, 2021 Total Non-Performing Loans Non-Accruing Loans Current 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 Substandard $ 2,805 $ 74 $ 2,149 $ 5,028 $ 216 $ 5,244 Total commercial 2,805 74 2,149 5,028 216 5,244 One-to-four family residential Substandard — — 320 320 223 543 Total one-to-four family residential — — 320 320 223 543 Construction and land Substandard — — 1,107 1,107 — 1,107 Total construction and land — — 1,107 1,107 — 1,107 Multifamily Substandard — — 1,131 1,131 — 1,131 Total multifamily — — 1,131 1,131 — 1,131 Home equity and lines of credit Substandard — — 128 128 98 226 Total home equity and lines of credit — — 128 128 98 226 Total real estate 2,805 74 4,835 7,714 537 8,251 Commercial and industrial loans Substandard 35 — 372 407 194 601 Total commercial and industrial loans 35 — 372 407 194 601 Other loans Substandard — — 3 3 — 3 Total other — — 3 3 — 3 Total non-performing loans $ 2,840 $ 74 $ 5,210 $ 8,124 $ 731 $ 8,855 December 31, 2020 Total Non-Performing Loans Non-Accruing Loans Current 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 Pass $ — $ — $ — $ — $ 500 $ 500 Substandard 2,829 537 2,863 6,229 — 6,229 Total commercial 2,829 537 2,863 6,229 500 6,729 One-to-four family residential Substandard 413 — 493 906 174 1,080 Total one-to-four family residential 413 — 493 906 174 1,080 Multifamily Substandard — — 1,153 1,153 — 1,153 Total multifamily — — 1,153 1,153 — 1,153 Home equity and lines of credit Substandard 60 — 131 191 — 191 Total home equity and lines of credit 60 — 131 191 — 191 Total real estate 3,302 537 4,640 8,479 674 9,153 Commercial and industrial loans Pass — — — — 101 101 Special Mention — — — — 85 85 Substandard — — 37 37 250 287 Total commercial and industrial loans — — 37 37 436 473 Other loans Pass — — — — 3 3 Total other — — — — 3 3 Total non-performing loans $ 3,302 $ 537 $ 4,677 $ 8,516 $ 1,113 $ 9,629 The following tables set forth the detail and delinquency status of loans held-for-investment, excluding PCD/PCI loans, net of deferred fees and costs, at June 30, 2021, and December 31, 2020 (in thousands): June 30, 2021 Past Due Loans 30-89 Days Past Due 90 Days or More Past Due 90 Days or More Past Due and Accruing Total Past Due Current Total Loans Receivable, net Loans held-for-investment: Real estate loans: Commercial Pass $ — $ — $ — $ — $ 698,500 $ 698,500 Special Mention — — — — 10,075 10,075 Substandard 2,728 2,148 216 5,092 21,636 26,728 Total commercial 2,728 2,148 216 5,092 730,211 735,303 One-to-four family residential Pass 292 — — 292 187,285 187,577 Special Mention 927 — — 927 1,939 2,866 Substandard — 320 223 543 2,990 3,533 Total one-to-four family residential 1,219 320 223 1,762 192,214 193,976 Construction and land Pass — — — — 62,018 62,018 Substandard — 1,107 — 1,107 — 1,107 Total construction and land — 1,107 — 1,107 62,018 63,125 Multifamily Pass 616 — — 616 2,480,376 2,480,992 Special Mention — — — — 442 442 Substandard 1,070 1,131 — 2,201 12,978 15,179 Total multifamily 1,686 1,131 — 2,817 2,493,796 2,496,613 Home equity and lines of credit Pass 199 — — 199 98,942 99,141 Special Mention — — — — 304 304 Substandard 4 128 98 230 139 369 Total home equity and lines of credit 203 128 98 429 99,385 99,814 Total real estate 5,836 4,834 537 11,207 3,577,624 3,588,831 Commercial and industrial Pass 122 — — 122 206,173 206,295 Special Mention — — — — 898 898 Substandard — 372 194 566 1,821 2,387 Total commercial and industrial 122 372 194 688 208,892 209,580 Other loans Pass — — — — 2,167 2,167 Substandard — 3 — 3 — 3 Total other loans — 3 — 3 2,167 2,170 Total loans held-for-investment $ 5,958 $ 5,209 $ 731 $ 11,898 $ 3,788,683 $ 3,800,581 December 31, 2020 Past Due Loans 30-89 Days Past Due 90 Days or More Past Due 90 Days or More Past Due and Accruing Total Past Due Current Total Loans Receivable, net Loans held-for-investment: Real estate loans: Commercial Pass $ 6,072 $ — $ 500 $ 6,572 $ 660,996 $ 667,568 Special Mention 72 — — 72 20,350 20,422 Substandard 3,185 2,863 — 6,048 23,528 29,576 Total commercial 9,329 2,863 500 12,692 704,874 717,566 One-to-four family residential Pass 282 — — 282 207,351 207,633 Special Mention 870 — — 870 1,586 2,456 Substandard — 493 174 667 1,466 2,133 Total one-to-four family residential 1,152 493 174 1,819 210,403 212,222 Construction and land Pass 994 — — 994 73,357 74,351 Total construction and land 994 — — 994 73,357 74,351 Multifamily Pass 1,283 — — 1,283 2,496,273 2,497,556 Special Mention — — — — 458 458 Substandard 610 1,153 — 1,763 13,157 14,920 Total multifamily 1,893 1,153 — 3,046 2,509,888 2,512,934 Home equity and lines of credit Pass 80 — — 80 92,305 92,385 Special Mention 200 — — 200 111 311 Substandard 100 131 — 231 210 441 Total home equity and lines of credit 380 131 — 511 92,626 93,137 Total real estate 13,748 4,640 674 19,062 3,591,148 3,610,210 Commercial and industrial Pass 632 — 101 733 188,639 189,372 Special Mention 61 — 85 146 352 498 Substandard 67 37 250 354 1,257 1,611 Total commercial and industrial 760 37 436 1,233 190,248 191,481 Other loans Pass 11 — 3 14 3,012 3,026 Substandard — — — — 3 3 Total other loans 11 — 3 14 3,015 3,029 Total loans held-for-investment $ 14,519 $ 4,677 $ 1,113 $ 20,309 $ 3,784,411 $ 3,804,720 The following tables summarize information on non-accrual loans, excluding PCD loans, at June 30, 2021 (in thousands): For the Three Months Ended For the Six Months Ended June 30, 2021 Recorded Investment Unpaid Principal Balance With No Related Allowance Interest Income Interest Income Real estate loans: Commercial $ 5,028 $ 5,537 $ 3,257 $ 25 $ 50 One-to-four family residential 320 352 — — 6 Construction and land 1,107 1,107 1,107 — — Multifamily 1,131 1,140 — 19 33 Home equity and lines of credit 128 377 — — 2 Commercial and industrial 407 611 1 2 4 Other 3 3 — — — Total non-accrual loans $ 8,124 $ 9,127 $ 4,365 $ 46 $ 95 The following table summarizes impaired loans, excluding PCI loans, at December 31, 2020 (in thousands): December 31, 2020 Recorded Investment Unpaid Principal Balance Related Allowance With No Allowance Recorded: Real estate loans: Commercial $ 8,838 $ 10,076 $ — One-to-four family residential 1,903 2,032 — Multifamily 626 1,097 — Home equity and lines of credit 15 15 — Total Real Estate 11,382 13,220 — With a Related Allowance Recorded: Real estate loans: Commercial 1,812 2,244 (66) Home equity and lines of credit 32 32 (3) Total Real Estate 1,844 2,276 (69) Commercial and industrial loans 16 16 (4) Total: Real estate loans Commercial 10,650 12,320 (66) One-to-four family residential 1,903 2,032 — Multifamily 626 1,097 — Home equity and lines of credit 47 47 (3) Commercial and industrial loans 16 16 (4) $ 13,242 $ 15,512 $ (73) Included in the table above at December 31, 2020, are impaired loans with carrying balances of $7.8 million that were not written down by charge-offs or for which there are no specific reserves in our allowance for loan losses. Loans not written down by charge-offs or specific reserves at December 31, 2020, 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 impaired loans, excluding PCI loans, and interest income recognized as of, and for, the three and six months ended June 30, 2020 (in thousands): For the Three Months Ended For the Six Months Ended June 30, 2020 June 30, 2020 Average Recorded Investment Interest Income Average Recorded Investment Interest Income With No Allowance Recorded: Real estate loans: Commercial $ 14,522 $ 191 $ 15,020 $ 286 One-to-four family residential 2,122 22 2,241 51 Multifamily 854 18 915 31 Home equity and lines of credit 20 — 20 — Commercial and industrial loans 37 — 38 — With a Related Allowance Recorded: Real estate loans: Commercial 2,335 41 1,992 57 One-to-four family residential 261 5 174 10 Home equity and lines of credit 33 — 33 1 Commercial and industrial loans 18 — 18 — Total: Real estate loans Commercial 16,857 232 17,012 343 One-to-four family residential 2,383 27 2,415 61 Multifamily 854 18 915 31 Home equity and lines of credit 53 — 53 1 Commercial and industrial loans 55 — 56 — $ 20,202 $ 277 $ 20,451 $ 436 Collateral-Dependent Loans Loans for which the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral are considered to be collateral-dependent loans. Collateral can have a significant financial effect in mitigating exposure to credit risk and, where there is sufficient collateral, an allowance for expected credit losses is not recognized or is minimal. For collateral-dependent loans, the allowance for expected credit losses is individually assessed based on the fair value of the collateral less estimated costs of sale. The Company's collateral-dependent loans are secured by real estate. Collateral values are generally based on appraisals which are adjusted for changes in market indices. As of June 30, 2021, and December 31, 2020, the Company had $9.8 million and $10.2 million of collateral-dependent impaired loans, respectively. The collateral-dependent loans at June 30, 2021 consisted of $7.7 million of commercial real estate loans, $1.1 million of construction loans, $619,000 of multifamily loans, and $380,000 of one-to-four family residential loans. For the six months ended June 30, 2021, there was no significant deterioration or changes in the collateral securing these loans. Troubled Debt Restructured Loans There were no loans modified in a TDR during the three or six months ended June 30, 2021. The following tables summarizes loans that were modified in a TDR during the six months ended June 30, 2020: Six Months Ended June 30, 2020 Number of Relationships Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) (in thousands) Troubled Debt Restructurings Residential 1 $ 187 $ 187 Commercial real estate 2 544 544 Total Troubled Debt Restructurings 3 $ 731 $ 731 (1) Amounts are at time of modification There were four loans (to three borrowers) in the table above, that requested COVID-19 relief and were modified as TDRs during the three months ended June 30, 2020, all of which were modified to restructure payment terms. All four of the loans were delinquent and on non-accrual status prior to the implementation of our COVID-19 customer relief program (discussed further below) and were therefore considered to be TDRs. In response to the COVID-19 pandemic and its economic impact to customers, a short-term modification program that complied with Section 4013 of the CARES Act and the Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus was implemented to provide temporary payment relief to those borrowers directly impacted by COVID-19. The program allows for deferral of payments for 90 days, which may extend for an additional 90 day periods, with modifications in the form of payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment. As of June 30, 2021, the Company had 21 loan modifications (excluding PCD loans) with principal and/or interest payment deferrals on outstanding loan balances of $21.5 million. Of these 21 payment deferrals, six were principal deferrals totaling $2.1 million, and 15 were principal and interest deferrals totaling $19.4 million. As these deferrals were current as of December 31, 2019, or the date of modification, these loans are not considered TDRs. 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. At June 30, 2021 and December 31, 2020, the Company had TDRs of $11.5 million and $12.1 million, respectively. Management classifies all TDRs as loans individually evaluated for impairment. Loans individually evaluated for impairment are 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 TDRs 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.

Allowance for Credit Losses on

Allowance for Credit Losses on Loans (“ACL”)	6 Months Ended
	Jun. 30, 2021
Credit Loss [Abstract]
Allowance for Credit Losses on Loans (“ACL”)	Allowance for Credit Losses on Loans (“ACL”) On January 1, 2021, the Company adopted the CECL standard, which requires the measurement of expected credit losses for financial assets measured at amortized cost, including loans, and certain off-balance-sheet credit exposures. As a result of the adoption of CECL, the Company recorded a $10.4 million increase to its allowance for credit losses on loans, including $6.8 million related to PCD loans. For PCD loans, the allowance for credit losses recorded is recognized through a gross-up that increases the amortized cost basis of loans with a corresponding increase to the allowance for credit losses, and therefore results in no impact to shareholders' equity. Under the CECL standard, the Company determines the ACL on loans based upon a consideration of its historical portfolio loss experience, current borrower-specific risk characteristics, forecasts of future economic conditions, reversion period, prepayments and qualitative adjustments. The allowance is measured on a collective (loan segment) basis when similar risk characteristics exist. Loans that do not share common risk characteristics are evaluated on an individual basis and are excluded from the collective evaluation. Accrued interest on loans is excluded from the calculation of the ACL due to the Company's non-accrual policy which results in the reversal of uncollectible accrued interest on non-accrual loans against interest income in a timely manner. Accrued interest receivable on loans held-for-investment totaled $12.6 million at June 30, 2021, and is reported in accrued interest receivable on the consolidated balance sheet. The Company’s loan portfolio segmentation includes: multifamily, commercial real estate, one-to-four family residential mortgage, home equity and lines of credit, commercial and industrial, construction and other consumer loans. Allowance for Collectively Evaluated Loans Held-for-Investment In estimating the quantitative component of the allowance on a collective basis, the Company uses a risk rating migration model which calculates an expected life of loan loss percentage for each loan by generating probability of default and loss given default metrics. The metrics are based on the migration of loans from performing to loss by credit quality rating or delinquency categories using historical life-of-loan analysis periods for each loan portfolio pool, and the severity of loss, based on the aggregate net lifetime losses incurred using the Company's own historical loss experience and comparable peer data loss history. The model's expected losses based on loss history are adjusted for qualitative factors. Among other things, these adjustments include and account for differences in: (i) changes in lending policies and procedures; (ii) changes in local, regional, national, and international economic and business conditions and developments that affect the collectability of our portfolio, including the condition of various market segments; (iii) changes in the experience, ability and depth of lending management and other relevant staff; (iv) changes in the quality of our loan review system; (v) the existence and effect of any concentrations of credit, and changes in the level of such concentrations; and (vi) the effect of other external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in our existing portfolio. The Company utilizes a two-year reasonable and supportable forecast period after which estimated losses revert to historical loss experience immediately for the remaining life of the loan. In establishing its estimate of expected credit losses, the Company utilizes five externally-sourced forward-looking economic scenarios developed by Moody's Analytics (“Moody's”). Management utilizes five different Moody's scenarios so as to incorporate uncertainties related to the unprecedented economic environment arising from the COVID-19 pandemic. These scenarios, which range from more benign to more severe economic outlooks, represent a ‘most likely outcome’ (the “Baseline” scenario) and four less likely scenarios referred to as the “Upside” scenarios and the “Downside” scenarios. Each scenario is assigned a weighting with a majority of the weighting placed on the Baseline scenario and lower weights placed on both the Upside and Downside scenarios. The weighting assigned by management is based on the economic outlook and available information at the reporting date. The model projects economic variables under each scenario based on detailed statistical analyses. The Company has identified and selected key variables that most closely correlated to its historical credit performance, which include: Gross domestic product, unemployment, and three collateral indices: the Commercial Property Price Index, the Commercial Property Price Apartment Index and the Case-Shiller Home Price Index. Allowance for Individually Evaluated Loans The Company measures specific reserves for individual loans that do not share common risk characteristics with other loans, consisting of all TDRs and non-accrual loans with an outstanding balance of $500,000 or greater. Loans individually evaluated for impairment are 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 credit losses on these loans, which could have a material effect on our financial results. Individually impaired loans that have no impairment losses are not considered for collective allowances described earlier. At June 30, 2021 and December 31, 2020, the specific component of the ACL for loans individually evaluated for impairment was $68,000 and $73,000, respectively. Allowance for Credit Losses – Off-Balance Sheet Exposures An ACL for off-balance-sheet exposures represents an estimate of expected credit losses arising from off-balance sheet exposures such as loan commitments, standby letters of credit and unused lines of credit (loans on books already). Commitments to fund unused lines of credit are agreements to lend additional funds to customers as long as there have been no violations of any of the conditions established in the agreements (original or restructured). Commitments to originate loans generally have a fixed expiration or other termination clauses, which may require payment of a fee. Since some of these loan commitments are expected to expire without being drawn upon, total commitments do not necessarily represent future cash requirements. The reserve for off-balance sheet exposures is determined using the CECL reserve factor in the related funded loan segment, adjusted for an average historical funding rate. The allowance for credit losses for off-balance sheet credit exposures is recorded in other liabilities on the consolidated balance sheets and the corresponding provision is included in other non-interest expense. The table below summarizes the allowance for credit losses for off-balance sheet credit exposures (in thousands): Three Months Ended Six Months Ended Balance at beginning of period $ 1,702 $ 808 Impact of CECL adoption — 737 Balance at beginning of period 1,702 1,545 Provision for credit losses 106 263 Balance at end of period $ 1,808 $ 1,808 The following tables set forth activity in our allowance for credit losses on loans, by loan type, as of, and for the three and six months ended June 30, 2021, and June 30, 2020 (in thousands): Three Months Ended June 30, 2021 Real Estate Commercial (1) One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCD) PCD Total Allowance for loan losses: Beginning balance $ 28,882 $ 5,172 $ 269 $ 643 $ 2,940 $ 9 $ 37,915 $ 5,282 $ 43,197 Charge-offs — — — — (12) — (12) — (12) Recoveries — 1 — 1 7 — 9 — 9 Provisions (credit) (2,342) (563) (10) 19 (341) (2) (3,239) (462) (3,701) Ending balance $ 26,540 $ 4,610 $ 259 $ 663 $ 2,594 $ 7 $ 34,673 $ 4,820 $ 39,493 (1) Commercial includes commercial real estate loans collateralized by owner-occupied, non-owner occupied, and multifamily properties. Three Months Ended June 30, 2020 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCI) PCI Total Allowance for loan losses: Beginning balance $ 5,444 $ 312 $ 671 $ 26,889 $ 574 $ 2,035 $ 86 $ 36,011 $ 789 $ 36,800 Charge-offs (164) — — — — (57) — (221) — (221) Recoveries 13 2 — — — 3 2 20 — 20 Provisions (credit) 1,406 (42) 266 354 (16) (135) 88 1,921 — 1,921 Ending balance $ 6,699 $ 272 $ 937 $ 27,243 $ 558 $ 1,846 $ 176 $ 37,731 $ 789 $ 38,520 Six Months Ended June 30, 2021 Real Estate Commercial (1) One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCD) PCD Total Beginning balance $ 33,005 $ 207 $ 1,214 $ 260 $ 1,842 $ 198 $ 36,726 $ 881 $ 37,607 Impact of CECL adoption (1,949) 5,233 (921) 419 947 (188) 3,541 6,812 10,353 Balance at January 1, 2021 31,056 5,440 293 679 2,789 10 40,267 7,693 47,960 Charge-offs — (21) — — (12) — (33) (2,411) (2,444) Recoveries 19 2 — 1 28 2 52 — 52 Provisions (credit) (4,535) (811) (34) (17) (211) (5) (5,613) (462) (6,075) Ending balance $ 26,540 $ 4,610 $ 259 $ 663 $ 2,594 $ 7 $ 34,673 $ 4,820 $ 39,493 (1) Commercial includes commercial real estate loans collateralized by owner-occupied, non-owner occupied, and multifamily properties. Six Months Ended June 30, 2020 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCI) PCI Total Allowance for loan losses: Beginning balance $ 4,891 $ 180 $ 536 $ 20,203 $ 317 $ 1,640 $ 151 $ 27,918 $ 789 $ 28,707 Charge-offs (597) — — — — (94) — (691) — (691) Recoveries 388 2 — — 1 9 — 400 — 400 Provisions (credit) 2,017 90 401 7,040 240 291 25 10,104 — 10,104 Ending balance $ 6,699 $ 272 $ 937 $ 27,243 $ 558 $ 1,846 $ 176 $ 37,731 $ 789 $ 38,520 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 June 30, 2021 and December 31, 2020 (in thousands): June 30, 2021 Real Estate Commercial (1) One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCD) PCD Total Allowance for credit losses on loans: Ending balance: individually evaluated for impairment $ 61 $ 4 $ — $ 2 $ 1 $ — $ 68 $ — $ 68 Ending balance: collectively evaluated for impairment 26,479 4,606 259 661 2,593 7 34,605 4,820 39,425 Loans, net: Ending balance 3,231,916 193,976 63,125 99,814 209,580 2,170 3,800,581 16,692 3,817,273 Ending balance: individually evaluated for impairment 9,716 1,610 1,107 43 14 — 12,490 — 12,490 Ending balance: collectively evaluated for impairment 3,222,200 192,366 62,018 99,771 76,858 2,170 3,655,383 16,692 3,672,075 PPP loans not evaluated for impairment (2) — — — — 132,708 — 132,708 — 132,708 December 31, 2020 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCI) PCI Total Allowance for credit losses on loans: Ending balance: individually evaluated for impairment $ 66 $ — $ — $ — $ 3 $ 4 $ — $ 73 $ — $ 73 Ending balance: collectively evaluated for impairment 5,944 207 1,214 26,995 257 1,838 198 36,653 881 37,534 Loans, net: Ending balance 717,566 212,222 74,351 2,512,934 93,137 191,481 3,029 3,804,720 18,518 3,823,238 Ending balance: individually evaluated for impairment 10,650 1,903 — 626 47 16 — 13,242 — 13,242 Ending balance: collectively evaluated for impairment 706,916 210,319 74,351 2,512,308 93,090 64,930 3,029 3,664,943 18,518 3,683,461 PPP loans not evaluated for impairment (2) — — — — — 126,535 — 126,535 — 126,535 (1) Commercial includes commercial real estate loans collateralized by owner-occupied, non-owner occupied, and multifamily properties. (2) PPP loans are guaranteed by the SBA and therefore excluded from the allowance for loan losses.

Deposits

Deposits	6 Months Ended
	Jun. 30, 2021
Deposits [Abstract]
Deposits	Deposits Deposit account balances are summarized as follows (in thousands): June 30, 2021 December 31, 2020 Non-interest-bearing checking $ 826,823 $ 695,831 NOW and interest-bearing checking 979,788 905,208 Savings and money market 1,788,545 1,953,885 Certificates of deposit 513,113 521,627 Total deposits $ 4,108,269 $ 4,076,551 Interest expense on deposit accounts is summarized for the periods indicated (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 NOW and interest-bearing checking, savings, and money market $ 845 $ 2,894 $ 1,777 $ 6,967 Certificates of deposit 826 4,579 1,764 9,785 Total interest expense on deposit accounts $ 1,671 $ 7,473 $ 3,541 $ 16,752

Equity Incentive Plans

Equity Incentive Plans	6 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement [Abstract]
Equity Incentive Plans	Equity Incentive Plans The following table is a summary of the Company’s stock options outstanding as of June 30, 2021, and changes therein during the six 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, 2020 2,214,193 $ 4.01 $ 13.94 3.96 Forfeited (41,090) 3.96 13.62 — Exercised (138,605) 3.92 13.78 — Outstanding - June 30, 2021 2,034,498 4.01 13.96 3.48 Exercisable - June 30, 2021 2,017,419 4.01 13.94 3.47 Expected future stock option expense related to the non-vested options outstanding as of June 30, 2021, is $15,000 over a weighted average period of 0.4 years. On January 29, 2021, the Company granted to directors and employees, under the 2019 Equity Incentive Plan, 147,315 restricted stock units with a total grant-date fair value of $1.8 million. Of these grants, 32,769 vest one year from the date of grant and 114,546 vest in equal installments over a five-year period beginning one year from the date of grant. The Company also issued 29,615 performance-based restricted stock units to its executive officers with a total grant date fair value of $366,041. Vesting of the performance-based restricted stock units will be based on achievement of certain levels of Core Return on Average Assets and will cliff-vest after a three-year measurement period ended January 29, 2024, 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 at June 30, 2021, and changes therein during the six months then ended. Number of Shares Awarded Weighted Average Grant Date Fair Value Non-vested at December 31, 2020 104,010 $ 15.91 Granted 176,930 12.59 Vested (38,470) 15.81 Forfeited (5,585) 15.28 Non-vested at June 30, 2021 236,885 13.46 Expected future stock award expense related to the non-vested restricted share awards as of June 30, 2021, is $2.3 million over a weighted average period of 3.6 years. During the three months ended June 30, 2021 and June 30, 2020, the Company recorded $261,000 and $432,000, respectively, of stock-based compensation related to the above plan. During the six months ended June 30, 2021 and June 30, 2020, the Company recorded $504,000 and $880,000, respectively, of stock-based compensation related to the above plan.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2021
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 June 30, 2021, and December 31, 2020, by level within the fair value hierarchy as required by the Fair Value Measurements and Disclosures Topic of the FASB 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 15 to the Consolidated Financial Statements of the Company’s 2020 Annual Report on Form 10-K. Fair Value Measurements at June 30, 2021 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: U.S. Government agency $ 2,754 $ — $ 2,754 $ — Mortgage-backed securities: Pass-through certificates: GSE 229,767 — 229,767 — REMICs: GSE 740,378 — 740,378 — 970,145 — 970,145 — Other debt securities: Municipal bonds 78 — 78 — Corporate bonds 124,446 — 124,446 — 124,524 — 124,524 — Total debt securities available-for-sale 1,097,423 — 1,097,423 — Trading securities 12,743 12,743 — — Equity securities 219 219 — — Total $ 1,110,385 $ 12,962 $ 1,097,423 $ — Measured on a non-recurring basis: Assets: Loans individually evaluated for impairment: Real estate loans: Commercial real estate $ 3,799 $ — $ — $ 3,799 One-to-four family residential mortgage 854 — — 854 Multifamily 9 — — 9 Home equity and lines of credit 29 — — 29 Total individually evaluated real estate loans 4,691 — — 4,691 Commercial and industrial loans 14 — — 14 Other real estate owned 100 — — 100 Total $ 4,805 $ — $ — $ 4,805 Fair Value Measurements at December 31, 2020 Using: Carrying Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (in thousands) Measured on a recurring basis: Assets: Investment securities: Debt securities available-for-sale: U.S. Government agency securities $ 3,158 $ — $ 3,158 $ — Mortgage-backed securities: Pass-through certificates: GSE 281,343 — 281,343 — REMICs: GSE 890,965 — 890,965 — Non-GSE 4 — 4 — 1,172,312 — 1,172,312 — Other debt securities: Municipal bonds 123 — 123 — Corporate bonds 88,418 — 88,418 — Asset-backed securities 794 — 794 — 89,335 — 89,335 — Total debt securities available-for-sale 1,264,805 — 1,264,805 — Trading securities 12,291 12,291 — — Equity securities 253 253 — — Total $ 1,277,349 $ 12,544 $ 1,264,805 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 5,268 $ — $ — $ 5,268 Multifamily 16 — — 16 Home equity and lines of credit 28 — — 28 Total impaired real estate loans 5,312 — — 5,312 Commercial and industrial loans 13 — — 13 Total $ 5,325 $ — $ — $ 5,325 The following table presents qualitative information for Level 3 assets measured at fair value on a non-recurring basis at June 30, 2021 and December 31, 2020 (dollars in thousands): Fair Value Valuation Methodology Unobservable Range of Inputs June 30, 2021 December 31, 2020 June 30, 2021 December 31, 2020 Individually evaluated loans $ 4,705 $ 5,325 Appraisals Discount for costs to sell 7.0% 7.0% Discount for quick sale 10.0% 10.0% Discounted cash flows Interest rates 4.88% to 6.25% 4.88% to 6.25% Other real estate owned 100 — Appraisals Discount for costs to sell 7.0% N/A 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 at June 30, 2021, and December 31, 2020. 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 six months ended June 30, 2021 or June 30, 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. Loans individually evaluated for impairment: At June 30, 2021 and December 31, 2020, the Company had loans individually evaluated for impairment (excluding PCD/PCI loans) with outstanding principal balances of $6.8 million and $7.4 million, respectively, which were recorded at their estimated fair value of $4.7 million and $5.3 million, respectively. The Company recorded a net decrease in the specific reserve for impaired loans of $5,000 and a net increase of $177,000 for the six months ended June 30, 2021 and June 30, 2020, respectively. Net charge-offs of $2.4 million and $291,000 were recorded for the six months ended June 30, 2021 and June 30, 2020, 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 TDRs. Other Real Estate Owned: At June 30, 2021, the Company had assets acquired through foreclosure of $100,000, recorded at estimated fair value, less estimated selling costs when acquired, thus establishing a new cost basis. Estimated fair value is generally based on independent appraisals. These appraisals include adjustments to comparable assets based on the appraisers’ market knowledge and experience, and are considered Level 3 inputs. When an asset is acquired, the excess of the loan balance over fair value, less estimated selling costs, is charged to the allowance for loan losses. If the estimated fair value of the asset declines, a write-down is recorded through non-interest expense. The valuation of foreclosed assets is subjective in nature and may be adjusted in the future because of changes in the economic conditions. In addition, the Company may be required, from time to time, to measure the fair value of certain other financial assets on a nonrecurring basis in accordance with U.S. GAAP. The adjustments to fair value usually result from the application of lower-of-cost-or-market accounting or write downs of individual assets. Fair Value of Financial Instruments: The FASB 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 ("FHLBNY") 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 June 30, 2021 and December 31, 2020, is presented in the following tables (in thousands): June 30, 2021 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 193,184 $ 193,184 $ — $ — $ 193,184 Trading securities 12,743 12,743 — — 12,743 Debt securities available-for-sale 1,097,423 — 1,097,423 — 1,097,423 Debt securities held-to-maturity 6,417 — 6,703 — 6,703 Equity securities 219 219 — — 219 FHLBNY stock, at cost 24,508 — 24,508 — 24,508 Net loans held-for-investment 3,777,780 — — 3,894,985 3,894,985 Derivative assets 788 — 788 — 788 Financial liabilities: Deposits $ 4,108,269 $ — $ 4,112,519 $ — $ 4,112,519 Borrowed funds 470,329 — 481,011 — 481,011 Advance payments by borrowers for taxes and insurance 24,203 — 24,203 — 24,203 Derivative liabilities 790 — 790 — 790 December 31, 2020 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 87,544 $ 87,544 $ — $ — $ 87,544 Trading securities 12,291 12,291 — — 12,291 Debt securities available-for-sale 1,264,805 — 1,264,805 — 1,264,805 Debt securities held-to-maturity 7,234 — 7,574 — 7,574 Equity securities 253 253 — — 253 FHLBNY stock, at cost 28,641 — 28,641 — 28,641 Loans held-for-sale 19,895 — — 19,895 19,895 Net loans held-for-investment 3,785,631 — — 3,842,054 3,842,054 Derivative assets 1,498 — 1,498 — 1,498 Financial liabilities: Deposits $ 4,076,551 $ — $ 4,082,538 $ — $ 4,082,538 Borrowed funds 591,789 — 609,900 — 609,900 Advance payments by borrowers for taxes and insurance 19,677 — 19,677 — 19,677 Derivative liabilities 1,502 — 1,502 — 1,502 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	6 Months Ended
	Jun. 30, 2021
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 were exercised and converted into common stock and unvested shares of restricted stock vested. 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 (in thousands, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Net income available to common stockholders $ 19,794 $ 10,793 $ 38,471 $ 15,344 Weighted average shares outstanding-basic 48,907,585 46,837,473 49,216,157 46,814,647 Effect of non-vested restricted stock and stock options outstanding 400,076 34,017 252,651 112,857 Weighted average shares outstanding-diluted 49,307,661 46,871,490 49,468,808 46,927,504 Earnings per share-basic $ 0.40 $ 0.23 $ 0.78 $ 0.33 Earnings per share-diluted $ 0.40 $ 0.23 $ 0.78 $ 0.33 Anti-dilutive shares 125,744 2,316,695 564,061 1,659,262

Leases

Leases	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Leases	Leases The Company’s leases primarily relate to real estate property for branches and office space with terms extending from three months up to 34.0 years. At June 30, 2021, all of the Company's leases are classified as operating leases, which are required to be recognized on the consolidated balance sheets as a right-of-use asset and a corresponding lease liability. 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 on 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, at lease inception, over a similar term in determining the present value of lease payments. Certain leases include options to renew, with one or more renewal terms ranging from five At June 30, 2021, the Company’s operating lease right-of-use assets and operating lease liabilities included on the consolidated balance sheet were $34.6 million and $40.7 million, respectively. At December 31, 2020, the Company’s operating lease right-of-use assets and operating lease liabilities included on the consolidated balance sheet were $36.7 million and $42.7 million, 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 on the consolidated statements of comprehensive income. Supplemental lease information at or for the six months ended June 30, 2021, and June 30, 2020 is as follows (dollars in thousands): Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Operating lease cost $ 1,453 $ 1,423 $ 2,908 $ 2,862 Variable lease cost 1,010 956 2,245 1,500 Net lease cost $ 2,463 $ 2,379 $ 5,153 $ 4,362 Cash paid for amounts included in measurement of operating lease liabilities $ 1,691 $ 1,524 $ 3,399 $ 3,069 Right-of-use assets obtained in exchange for new operating lease liabilities $ — $ — $ — $ 3,028 Weighted average remaining lease term 12.24 years 12.63 years Weighted average discount rate 3.61 % 3.59 % 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 (in thousands): Year Amount 2021 $ 2,937 2022 5,550 2023 5,504 2024 5,067 2025 4,710 Thereafter 28,196 Total lease payments 51,964 Less: imputed interest 11,243 Present value of lease liabilities $ 40,721

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2021
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. For the three and six months ended June 30, 2021 and 2020, other income primarily includes rental income from subleasing one of the Company's branches to a third party and loan servicing fees. Other income is recognized at the time the transaction occurs. The following table summarizes non-interest income for the periods indicated (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Fees and service charges for customer services: Service charges $ 690 $ 356 $ 1,410 $ 1,109 ATM and card interchange fees 483 275 882 579 Investment fees 154 35 232 98 Total fees and service charges for customer services 1,327 666 2,524 1,786 Income on bank-owned life insurance (1) 857 865 1,705 1,741 Gains on available-for-sale debt securities, net (1) 509 73 606 60 Gains (losses) on trading securities, net (1) 807 1,626 1,171 (366) Gains on sales of loans (1) 1,401 665 1,401 665 Swap income (1) — 308 — 384 Other 15 35 145 76 Total non-interest income $ 4,916 $ 4,238 $ 7,552 $ 4,346 (1) Not in scope of Topic 606

Derivatives

Derivatives	6 Months Ended
	Jun. 30, 2021
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. At June 30, 2021, the Company had seven interest rate swaps with a notional amount of $38.7 million. At December 31, 2020, the Company had seven interest rate swaps with a notional amount of $39.2 million. For both the three and six months ended June 30, 2021, the Company recorded net fee income of $0. For the three and six months ended June 30, 2020, the company recorded net fee income of $308,000 and $384,000, respectively. The table below presents the fair value of the derivatives as well as their location on the consolidated balance sheets (in thousands): Fair Value Balance Sheet Location June 30, 2021 December 31, 2020 Other assets $ 788 $ 1,498 Other liabilities 790 1,502

Recent Accounting Pronouncement

Recent Accounting Pronouncements Adopted	6 Months Ended
	Jun. 30, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recent Accounting Pronouncements Adopted	Recent Accounting Pronouncements Adopted ASU No. 2016-13. In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): “Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). This guidance was subsequently amended by ASU No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments”; ASU No. 2019-05, “Financial Instruments-Credit Losses (Topic 326): Targeted Transition Relief”; and ASU No. 2019-11, “Codification Improvements to Topic 326, Financial Instruments-Credit Losses”. ASU No. 2016-13 and its subsequent updates are collectively known as “CECL”. CECL replaces the current incurred loss impairment model that recognizes losses when a probable threshold is met with a requirement to recognize lifetime expected credit losses immediately when a financial asset is originated or purchased. For available-for-sale debt securities where fair value is less than cost, credit-related impairment would be recognized in an allowance for credit losses and adjusted in each subsequent period for changes in credit risk. CECL also expands the disclosure requirements regarding an entity’s assumptions, models, and methods for estimating the allowance for credit losses. ASU 2016-13 and its related amendments were initially effective for financial statements for fiscal years and interim periods beginning after December 15, 2019. The Company elected to defer the adoption of the CECL methodology permitted by the CARES Act, signed into law on March 27, 2020, which provided financial institutions with the option to defer adoption of ASU 2016-13 until the earlier of the end of the pandemic or December 31, 2020. This relief was further extended by the Consolidations Appropriations Act enacted on December 27, 2020, to the earlier of the first day of an entity's fiscal year after the date the national emergency terminates or January 1, 2022. The Company adopted ASU 2016-13 and its related amendments on January 1, 2021, using a modified retrospective approach. Our implementation process included: assessment and documentation of governance and reporting processes and related internal controls; model development, documentation and validation; and the incorporation of qualitative adjustments for model limitations, among other things. ASU 2016-13 lists several credit loss methods that are acceptable such as a discounted cash flow method, loss-rate method and probability of default/loss given default (“PD/LGD”) method. The Company utilizes the PD/LGD methodology to estimate its allowance for loan losses. At adoption, the Company recorded an $11.1 million increase to its allowance for credit losses, including reserves of $10.4 million related to loans and $737,000 related to unfunded credit commitments. Of the $10.4 million increase in loan reserves, $6.8 million represents PCD loan-related reserves which were recognized through a gross-up that increases the amortized cost basis of loans with a corresponding increase to the allowance for credit losses, and therefore results in no impact to shareholders' equity. The non-PCD loan related increase to the allowance for credit losses of $4.3 million, including the reserves for unfunded loan commitments, was offset in shareholders' equity and deferred tax assets. For further details on the adoption of CECL see Note 6 - Loans Note 7 - Allowance for Credit Losses on Loans ASU No. 2019-12. In December 2019, the FASB issued ASU No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes.” ASU No. 2019-12 simplifies accounting for income taxes by removing specific technical exceptions in ASC 740 related to the incremental approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period and the recognition for deferred tax liabilities for outside basis differences. ASU No. 2019-12 also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The Company adopted ASU 2019-12 on January 1, 2021, which did not have a material impact on the Company's financial condition or results of operations.

Consolidated Financial Statem_2

Consolidated Financial Statements (Policies)	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The consolidated financial statements are comprised of the accounts of Northfield Bancorp, Inc. (and its wholly owned subsidiaries, Northfield Investments, Inc. and Northfield Bank (the “ Bank ” ), and the Bank’s wholly-owned 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 balance sheets and the consolidated statements of comprehensive income for the unaudited periods presented have been included. The results of operations and other data presented for the three and six months ended June 30, 2021 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2021 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 balance sheets and the consolidated statements of comprehensive income 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-deteriorated (“PCD”, or, previously, 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 ”
Loans and Allowance for Credit Losses	On January 1, 2021, the Company adopted ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): “Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”) which replaces the incurred loss methodology with an expected loss methodology that is referred to as the current expected credit loss (“CECL”) methodology. The Company used the modified retrospective method for all financial assets measured at amortized cost and off-balance sheet credit exposures. The adoption of the new standard resulted in the Company recording an increase in the allowance for credit losses of $11.1 million, comprised of $10.4 million and $737,000 for loans and unfunded commitments, respectively, including $6.8 million related to PCD loans. For PCD loans, the allowance for credit losses recorded is recognized through a gross-up that increases the amortized cost basis of loans with a corresponding increase to the allowance for credit losses, and therefore results in no impact to shareholders' equity. The remaining increase to the allowance for credit losses of $4.3 million was offset in stockholders' equity and deferred taxes. As a result of adopting CECL, the Company's prior distinction between the originated loan portfolio and the non-PCD acquired loan portfolio is no longer necessary. Results for reporting periods beginning after January 1, 2021 are presented under CECL, while prior period amounts continue to be recorded with previously applicable U.S. GAAP. Further information regarding the impact of CECL can be found in Note 6 - Loans Note 7 - Allowance for Loan Losses Note 15 - Recent Accounting Pronouncements Adopted
Fair Value Measurements	The following tables present the assets reported on the consolidated balance sheets at their estimated fair value as of June 30, 2021, and December 31, 2020, by level within the fair value hierarchy as required by the Fair Value Measurements and Disclosures Topic of the FASB 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 ("FHLBNY") 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.
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 were exercised and converted into common stock and unvested shares of restricted stock vested. 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	ASU No. 2016-13. In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): “Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). This guidance was subsequently amended by ASU No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments”; ASU No. 2019-05, “Financial Instruments-Credit Losses (Topic 326): Targeted Transition Relief”; and ASU No. 2019-11, “Codification Improvements to Topic 326, Financial Instruments-Credit Losses”. ASU No. 2016-13 and its subsequent updates are collectively known as “CECL”. CECL replaces the current incurred loss impairment model that recognizes losses when a probable threshold is met with a requirement to recognize lifetime expected credit losses immediately when a financial asset is originated or purchased. For available-for-sale debt securities where fair value is less than cost, credit-related impairment would be recognized in an allowance for credit losses and adjusted in each subsequent period for changes in credit risk. CECL also expands the disclosure requirements regarding an entity’s assumptions, models, and methods for estimating the allowance for credit losses. ASU 2016-13 and its related amendments were initially effective for financial statements for fiscal years and interim periods beginning after December 15, 2019. The Company elected to defer the adoption of the CECL methodology permitted by the CARES Act, signed into law on March 27, 2020, which provided financial institutions with the option to defer adoption of ASU 2016-13 until the earlier of the end of the pandemic or December 31, 2020. This relief was further extended by the Consolidations Appropriations Act enacted on December 27, 2020, to the earlier of the first day of an entity's fiscal year after the date the national emergency terminates or January 1, 2022. The Company adopted ASU 2016-13 and its related amendments on January 1, 2021, using a modified retrospective approach. Our implementation process included: assessment and documentation of governance and reporting processes and related internal controls; model development, documentation and validation; and the incorporation of qualitative adjustments for model limitations, among other things. ASU 2016-13 lists several credit loss methods that are acceptable such as a discounted cash flow method, loss-rate method and probability of default/loss given default (“PD/LGD”) method. The Company utilizes the PD/LGD methodology to estimate its allowance for loan losses. At adoption, the Company recorded an $11.1 million increase to its allowance for credit losses, including reserves of $10.4 million related to loans and $737,000 related to unfunded credit commitments. Of the $10.4 million increase in loan reserves, $6.8 million represents PCD loan-related reserves which were recognized through a gross-up that increases the amortized cost basis of loans with a corresponding increase to the allowance for credit losses, and therefore results in no impact to shareholders' equity. The non-PCD loan related increase to the allowance for credit losses of $4.3 million, including the reserves for unfunded loan commitments, was offset in shareholders' equity and deferred tax assets. For further details on the adoption of CECL see Note 6 - Loans Note 7 - Allowance for Credit Losses on Loans ASU No. 2019-12. In December 2019, the FASB issued ASU No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes.” ASU No. 2019-12 simplifies accounting for income taxes by removing specific technical exceptions in ASC 740 related to the incremental approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period and the recognition for deferred tax liabilities for outside basis differences. ASU No. 2019-12 also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The Company adopted ASU 2019-12 on January 1, 2021, which did not have a material impact on the Company's financial condition or results of operations.

Business Combinations (Tables)

Business Combinations (Tables)	6 Months Ended
	Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Schedule of Business Acquisitions, by Acquisition	The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of acquisition for Victory (in thousands): July 1, 2020 Fair Value Total Purchase Price $ 41,173 Assets acquired: Cash and cash equivalents $ 72,875 Debt securities available for sale 126,931 Loans 180,431 Accrued interest receivable 1,415 Bank-owned life insurance 5,714 Premises and equipment 7,789 Other assets 5,010 Total assets acquired 400,165 Liabilities assumed: Deposits 354,592 Other liabilities 7,001 Total liabilities assumed 361,593 Net assets acquired $ 38,572 Goodwill recorded in the merger $ 2,601
Schedule of Credit Impaired Loans Acquired in Acquisition	The following is a summary of the credit impaired loans acquired in the Victory acquisition as of the closing date (in thousands): July 1, 2020 Contractually required principal and interest $ 7,809 Contractual cash flows not expected to be collected (non-accretable discount) 3,315 Expected cash flows to be collected at acquisition 4,494 Interest component of expected cash flows (accretable yield) (599) Fair value of acquired loans $ 3,895

Debt Securities Available-for_2

Debt Securities Available-for-Sale (Tables)	6 Months Ended
	Jun. 30, 2021
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 June 30, 2021, and December 31, 2020 (in thousands): June 30, 2021 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value U.S. Government agency securities $ 2,758 $ — $ (4) $ 2,754 Mortgage-backed securities: Pass-through certificates: Government sponsored enterprises ("GSEs") 221,513 8,640 (386) 229,767 Real estate mortgage investment conduits ("REMICs"): GSE 735,021 5,859 (502) 740,378 956,534 14,499 (888) 970,145 Other debt securities: Municipal bonds 77 1 — 78 Corporate bonds 123,678 815 (47) 124,446 123,755 816 (47) 124,524 Total debt securities available-for-sale $ 1,083,047 $ 15,315 $ (939) $ 1,097,423 December 31, 2020 Gross Gross Estimated Amortized unrealized unrealized fair cost gains losses value U.S. Government agency securities $ 3,168 $ — $ (10) $ 3,158 Mortgage-backed securities: Pass-through certificates: GSE 270,867 10,720 (244) 281,343 REMICs: GSE 884,414 7,027 (476) 890,965 Non-GSE 4 — — 4 1,155,285 17,747 (720) 1,172,312 Other debt securities: Municipal bonds 122 1 — 123 Corporate bonds 87,319 1,099 — 88,418 Asset-backed securities 779 15 — 794 88,220 1,115 — 89,335 Total debt securities available-for-sale $ 1,246,673 $ 18,862 $ (730) $ 1,264,805
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 June 30, 2021 (in thousands): Available-for-sale Amortized cost Estimated fair value Due in one year or less $ 35,282 $ 35,757 Due after one year through five years 73,463 73,804 Due after five years through ten years 17,768 17,717 $ 126,513 $ 127,278
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 June 30, 2021, and December 31, 2020, were as follows (in thousands): June 30, 2021 Less than 12 months 12 months or more Total Unrealized Estimated Unrealized Estimated Unrealized Estimated losses fair value losses fair value losses fair value U.S. Government agency securities $ (4) $ 2,754 $ — $ — $ (4) $ 2,754 Mortgage-backed securities: Pass-through certificates: GSE (378) 31,540 (8) 383 (386) 31,923 REMICs: GSE (502) 124,255 — — (502) 124,255 Other debt securities: Corporate bonds (47) 14,964 — — (47) 14,964 Total $ (931) $ 173,513 $ (8) $ 383 $ (939) $ 173,896 December 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 U.S. Government agency securities $ (10) $ 3,158 $ — $ — $ (10) $ 3,158 Mortgage-backed securities: Pass-through certificates: GSE (233) 28,419 (11) 459 (244) 28,878 REMICs: GSE (476) 210,569 — — (476) 210,569 Total $ (719) $ 242,146 $ (11) $ 459 $ (730) $ 242,605

Debt Securities Held-to-Matur_2

Debt Securities Held-to-Maturity (Tables)	6 Months Ended
	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Securities Held-to-Maturity	The following is a summary of mortgage-backed securities held-to-maturity at June 30, 2021 and December 31, 2020 (in thousands): June 30, 2021 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSE $ 6,417 $ 286 $ — $ 6,703 Total securities held-to-maturity $ 6,417 $ 286 $ — $ 6,703 December 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: Pass-through certificates: GSE $ 7,234 $ 340 $ — $ 7,574 Total securities held-to-maturity $ 7,234 $ 340 $ — $ 7,574

Loans (Tables)

Loans (Tables)	6 Months Ended
	Jun. 30, 2021
Receivables [Abstract]
Net Loans Held-for-Investment	The following table summarizes the Company’s loans held-for-investment (in thousands): June 30, December 31, 2021 2020 Real estate loans: Multifamily $ 2,496,613 $ 2,509,310 Commercial mortgage 735,303 716,973 One-to-four family residential mortgage 193,976 210,817 Home equity and lines of credit 99,814 91,126 Construction and land 63,125 74,318 Total real estate loans 3,588,831 3,602,544 Commercial and industrial loans (1) 209,580 194,352 Other loans 2,170 3,029 Total commercial and industrial and other loans 211,750 197,381 Deferred origination loan costs, net (2) — 4,795 Loans held-for-investment, net (excluding PCD/PCI) 3,800,581 3,804,720 PCD/PCI loans 16,692 18,518 Total Loans held-for-investment, net 3,817,273 3,823,238 Allowance for loan losses (39,493) (37,607) Net loans held-for-investment $ 3,777,780 $ 3,785,631 (1) Included in commercial and industrial loans at June 30, 2021 and December 31, 2020 are PPP loans totaling $132.7 million and $126.5 million, respectively.
Schedule of Loans Held-for-Investment, Excluding PCD Loans, Net of Deferred Fees and Costs	The following table presents the Company’s loans held-for-investment, excluding PCD loans, by loan class, credit risk ratings and year of origination, at June 30, 2021 (in thousands): June 30, 2021 2021 2020 2019 2018 2017 Prior Revolving Loans Total Real Estate: Multifamily Pass $ 370,670 $ 548,666 $ 360,502 $ 323,853 $ 259,515 $ 617,290 $ 496 $ 2,480,992 Special Mention — — — — — 442 — 442 Substandard — — 4,681 1,609 — 8,889 — 15,179 Total multifamily 370,670 548,666 365,183 325,462 259,515 626,621 496 2,496,613 Commercial Pass 53,671 74,958 99,407 101,009 68,317 291,092 10,046 698,500 Special Mention — — 511 — 500 9,064 — 10,075 Substandard — — 9,653 310 2,390 11,007 3,368 26,728 Total commercial 53,671 74,958 109,571 101,319 71,207 311,163 13,414 735,303 One-to-four family residential Pass 2,405 9,483 12,488 15,294 12,669 134,622 616 187,577 Special Mention — — 467 — — 2,399 — 2,866 Substandard — — 526 — — 3,007 — 3,533 Total one-to-four family residential 2,405 9,483 13,481 15,294 12,669 140,028 616 193,976 Construction and land Pass — 1,570 1,396 535 2,611 3,589 52,317 62,018 Substandard — — — — — — 1,107 1,107 Total construction and land — 1,570 1,396 535 2,611 3,589 53,424 63,125 Home equity and lines of credit Pass 21,126 19,526 13,818 10,621 4,485 29,503 62 99,141 Special Mention — — — — — 304 — 304 Substandard — — 98 87 — 184 — 369 Total home equity and lines of credit 21,126 19,526 13,916 10,708 4,485 29,991 62 99,814 Total real estate loans 447,872 654,203 503,547 453,318 350,487 1,111,392 68,012 3,588,831 Commercial and industrial Pass 92,179 72,076 8,684 4,549 1,352 14,654 12,801 206,295 Special Mention — 72 160 238 145 283 — 898 Substandard — 490 324 711 — 862 — 2,387 Total commercial and industrial 92,179 72,638 9,168 5,498 1,497 15,799 12,801 209,580 Other Pass 1,808 181 26 44 5 103 — 2,167 Substandard — — — — — 3 — 3 Total other 1,808 181 26 44 5 106 — 2,170 Total loans held-for-investment, net $ 541,859 $ 727,022 $ 512,741 $ 458,860 $ 351,989 $ 1,127,297 $ 80,813 $ 3,800,581 The following table details the recorded investment of loans held-for-investment, excluding PCI loans, net of deferred fees and costs, by loan type and credit quality indicator at December 31, 2020 (in thousands): December 31, 2020 Real Estate Multifamily Commercial One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total Internal Risk Rating Pass $ 2,497,556 $ 667,568 $ 207,633 $ 74,351 $ 92,385 $ 189,372 $ 3,026 $ 3,731,891 Special Mention 458 20,422 2,456 — 311 498 — 24,145 Substandard 14,920 29,576 2,133 — 441 1,611 3 48,684 Total loans held-for-investment, net $ 2,512,934 $ 717,566 $ 212,222 $ 74,351 $ 93,137 $ 191,481 $ 3,029 $ 3,804,720
Allowance For Loan Losses And Loans Receivable By Portfolio Segment Table	The following tables set forth activity in our allowance for credit losses on loans, by loan type, as of, and for the three and six months ended June 30, 2021, and June 30, 2020 (in thousands): Three Months Ended June 30, 2021 Real Estate Commercial (1) One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCD) PCD Total Allowance for loan losses: Beginning balance $ 28,882 $ 5,172 $ 269 $ 643 $ 2,940 $ 9 $ 37,915 $ 5,282 $ 43,197 Charge-offs — — — — (12) — (12) — (12) Recoveries — 1 — 1 7 — 9 — 9 Provisions (credit) (2,342) (563) (10) 19 (341) (2) (3,239) (462) (3,701) Ending balance $ 26,540 $ 4,610 $ 259 $ 663 $ 2,594 $ 7 $ 34,673 $ 4,820 $ 39,493 (1) Commercial includes commercial real estate loans collateralized by owner-occupied, non-owner occupied, and multifamily properties. Three Months Ended June 30, 2020 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCI) PCI Total Allowance for loan losses: Beginning balance $ 5,444 $ 312 $ 671 $ 26,889 $ 574 $ 2,035 $ 86 $ 36,011 $ 789 $ 36,800 Charge-offs (164) — — — — (57) — (221) — (221) Recoveries 13 2 — — — 3 2 20 — 20 Provisions (credit) 1,406 (42) 266 354 (16) (135) 88 1,921 — 1,921 Ending balance $ 6,699 $ 272 $ 937 $ 27,243 $ 558 $ 1,846 $ 176 $ 37,731 $ 789 $ 38,520 Six Months Ended June 30, 2021 Real Estate Commercial (1) One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCD) PCD Total Beginning balance $ 33,005 $ 207 $ 1,214 $ 260 $ 1,842 $ 198 $ 36,726 $ 881 $ 37,607 Impact of CECL adoption (1,949) 5,233 (921) 419 947 (188) 3,541 6,812 10,353 Balance at January 1, 2021 31,056 5,440 293 679 2,789 10 40,267 7,693 47,960 Charge-offs — (21) — — (12) — (33) (2,411) (2,444) Recoveries 19 2 — 1 28 2 52 — 52 Provisions (credit) (4,535) (811) (34) (17) (211) (5) (5,613) (462) (6,075) Ending balance $ 26,540 $ 4,610 $ 259 $ 663 $ 2,594 $ 7 $ 34,673 $ 4,820 $ 39,493 (1) Commercial includes commercial real estate loans collateralized by owner-occupied, non-owner occupied, and multifamily properties. Six Months Ended June 30, 2020 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCI) PCI Total Allowance for loan losses: Beginning balance $ 4,891 $ 180 $ 536 $ 20,203 $ 317 $ 1,640 $ 151 $ 27,918 $ 789 $ 28,707 Charge-offs (597) — — — — (94) — (691) — (691) Recoveries 388 2 — — 1 9 — 400 — 400 Provisions (credit) 2,017 90 401 7,040 240 291 25 10,104 — 10,104 Ending balance $ 6,699 $ 272 $ 937 $ 27,243 $ 558 $ 1,846 $ 176 $ 37,731 $ 789 $ 38,520 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 June 30, 2021 and December 31, 2020 (in thousands): June 30, 2021 Real Estate Commercial (1) One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCD) PCD Total Allowance for credit losses on loans: Ending balance: individually evaluated for impairment $ 61 $ 4 $ — $ 2 $ 1 $ — $ 68 $ — $ 68 Ending balance: collectively evaluated for impairment 26,479 4,606 259 661 2,593 7 34,605 4,820 39,425 Loans, net: Ending balance 3,231,916 193,976 63,125 99,814 209,580 2,170 3,800,581 16,692 3,817,273 Ending balance: individually evaluated for impairment 9,716 1,610 1,107 43 14 — 12,490 — 12,490 Ending balance: collectively evaluated for impairment 3,222,200 192,366 62,018 99,771 76,858 2,170 3,655,383 16,692 3,672,075 PPP loans not evaluated for impairment (2) — — — — 132,708 — 132,708 — 132,708 December 31, 2020 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCI) PCI Total Allowance for credit losses on loans: Ending balance: individually evaluated for impairment $ 66 $ — $ — $ — $ 3 $ 4 $ — $ 73 $ — $ 73 Ending balance: collectively evaluated for impairment 5,944 207 1,214 26,995 257 1,838 198 36,653 881 37,534 Loans, net: Ending balance 717,566 212,222 74,351 2,512,934 93,137 191,481 3,029 3,804,720 18,518 3,823,238 Ending balance: individually evaluated for impairment 10,650 1,903 — 626 47 16 — 13,242 — 13,242 Ending balance: collectively evaluated for impairment 706,916 210,319 74,351 2,512,308 93,090 64,930 3,029 3,664,943 18,518 3,683,461 PPP loans not evaluated for impairment (2) — — — — — 126,535 — 126,535 — 126,535 (1) Commercial includes commercial real estate loans collateralized by owner-occupied, non-owner occupied, and multifamily properties. (2) PPP loans are guaranteed by the SBA and therefore excluded from the allowance for loan losses.
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 June 30, 2021, and December 31, 2020, excluding PCD/PCI loans (in thousands): June 30, 2021 Total Non-Performing Loans Non-Accruing Loans Current 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 Substandard $ 2,805 $ 74 $ 2,149 $ 5,028 $ 216 $ 5,244 Total commercial 2,805 74 2,149 5,028 216 5,244 One-to-four family residential Substandard — — 320 320 223 543 Total one-to-four family residential — — 320 320 223 543 Construction and land Substandard — — 1,107 1,107 — 1,107 Total construction and land — — 1,107 1,107 — 1,107 Multifamily Substandard — — 1,131 1,131 — 1,131 Total multifamily — — 1,131 1,131 — 1,131 Home equity and lines of credit Substandard — — 128 128 98 226 Total home equity and lines of credit — — 128 128 98 226 Total real estate 2,805 74 4,835 7,714 537 8,251 Commercial and industrial loans Substandard 35 — 372 407 194 601 Total commercial and industrial loans 35 — 372 407 194 601 Other loans Substandard — — 3 3 — 3 Total other — — 3 3 — 3 Total non-performing loans $ 2,840 $ 74 $ 5,210 $ 8,124 $ 731 $ 8,855 December 31, 2020 Total Non-Performing Loans Non-Accruing Loans Current 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 Pass $ — $ — $ — $ — $ 500 $ 500 Substandard 2,829 537 2,863 6,229 — 6,229 Total commercial 2,829 537 2,863 6,229 500 6,729 One-to-four family residential Substandard 413 — 493 906 174 1,080 Total one-to-four family residential 413 — 493 906 174 1,080 Multifamily Substandard — — 1,153 1,153 — 1,153 Total multifamily — — 1,153 1,153 — 1,153 Home equity and lines of credit Substandard 60 — 131 191 — 191 Total home equity and lines of credit 60 — 131 191 — 191 Total real estate 3,302 537 4,640 8,479 674 9,153 Commercial and industrial loans Pass — — — — 101 101 Special Mention — — — — 85 85 Substandard — — 37 37 250 287 Total commercial and industrial loans — — 37 37 436 473 Other loans Pass — — — — 3 3 Total other — — — — 3 3 Total non-performing loans $ 3,302 $ 537 $ 4,677 $ 8,516 $ 1,113 $ 9,629
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 loans held-for-investment, excluding PCD/PCI loans, net of deferred fees and costs, at June 30, 2021, and December 31, 2020 (in thousands): June 30, 2021 Past Due Loans 30-89 Days Past Due 90 Days or More Past Due 90 Days or More Past Due and Accruing Total Past Due Current Total Loans Receivable, net Loans held-for-investment: Real estate loans: Commercial Pass $ — $ — $ — $ — $ 698,500 $ 698,500 Special Mention — — — — 10,075 10,075 Substandard 2,728 2,148 216 5,092 21,636 26,728 Total commercial 2,728 2,148 216 5,092 730,211 735,303 One-to-four family residential Pass 292 — — 292 187,285 187,577 Special Mention 927 — — 927 1,939 2,866 Substandard — 320 223 543 2,990 3,533 Total one-to-four family residential 1,219 320 223 1,762 192,214 193,976 Construction and land Pass — — — — 62,018 62,018 Substandard — 1,107 — 1,107 — 1,107 Total construction and land — 1,107 — 1,107 62,018 63,125 Multifamily Pass 616 — — 616 2,480,376 2,480,992 Special Mention — — — — 442 442 Substandard 1,070 1,131 — 2,201 12,978 15,179 Total multifamily 1,686 1,131 — 2,817 2,493,796 2,496,613 Home equity and lines of credit Pass 199 — — 199 98,942 99,141 Special Mention — — — — 304 304 Substandard 4 128 98 230 139 369 Total home equity and lines of credit 203 128 98 429 99,385 99,814 Total real estate 5,836 4,834 537 11,207 3,577,624 3,588,831 Commercial and industrial Pass 122 — — 122 206,173 206,295 Special Mention — — — — 898 898 Substandard — 372 194 566 1,821 2,387 Total commercial and industrial 122 372 194 688 208,892 209,580 Other loans Pass — — — — 2,167 2,167 Substandard — 3 — 3 — 3 Total other loans — 3 — 3 2,167 2,170 Total loans held-for-investment $ 5,958 $ 5,209 $ 731 $ 11,898 $ 3,788,683 $ 3,800,581 December 31, 2020 Past Due Loans 30-89 Days Past Due 90 Days or More Past Due 90 Days or More Past Due and Accruing Total Past Due Current Total Loans Receivable, net Loans held-for-investment: Real estate loans: Commercial Pass $ 6,072 $ — $ 500 $ 6,572 $ 660,996 $ 667,568 Special Mention 72 — — 72 20,350 20,422 Substandard 3,185 2,863 — 6,048 23,528 29,576 Total commercial 9,329 2,863 500 12,692 704,874 717,566 One-to-four family residential Pass 282 — — 282 207,351 207,633 Special Mention 870 — — 870 1,586 2,456 Substandard — 493 174 667 1,466 2,133 Total one-to-four family residential 1,152 493 174 1,819 210,403 212,222 Construction and land Pass 994 — — 994 73,357 74,351 Total construction and land 994 — — 994 73,357 74,351 Multifamily Pass 1,283 — — 1,283 2,496,273 2,497,556 Special Mention — — — — 458 458 Substandard 610 1,153 — 1,763 13,157 14,920 Total multifamily 1,893 1,153 — 3,046 2,509,888 2,512,934 Home equity and lines of credit Pass 80 — — 80 92,305 92,385 Special Mention 200 — — 200 111 311 Substandard 100 131 — 231 210 441 Total home equity and lines of credit 380 131 — 511 92,626 93,137 Total real estate 13,748 4,640 674 19,062 3,591,148 3,610,210 Commercial and industrial Pass 632 — 101 733 188,639 189,372 Special Mention 61 — 85 146 352 498 Substandard 67 37 250 354 1,257 1,611 Total commercial and industrial 760 37 436 1,233 190,248 191,481 Other loans Pass 11 — 3 14 3,012 3,026 Substandard — — — — 3 3 Total other loans 11 — 3 14 3,015 3,029 Total loans held-for-investment $ 14,519 $ 4,677 $ 1,113 $ 20,309 $ 3,784,411 $ 3,804,720
Schedule of Non-accrual Loans, Excluding PCD Loans	The following tables summarize information on non-accrual loans, excluding PCD loans, at June 30, 2021 (in thousands): For the Three Months Ended For the Six Months Ended June 30, 2021 Recorded Investment Unpaid Principal Balance With No Related Allowance Interest Income Interest Income Real estate loans: Commercial $ 5,028 $ 5,537 $ 3,257 $ 25 $ 50 One-to-four family residential 320 352 — — 6 Construction and land 1,107 1,107 1,107 — — Multifamily 1,131 1,140 — 19 33 Home equity and lines of credit 128 377 — — 2 Commercial and industrial 407 611 1 2 4 Other 3 3 — — — Total non-accrual loans $ 8,124 $ 9,127 $ 4,365 $ 46 $ 95
Summary of Impaired Loans	The following table summarizes impaired loans, excluding PCI loans, at December 31, 2020 (in thousands): December 31, 2020 Recorded Investment Unpaid Principal Balance Related Allowance With No Allowance Recorded: Real estate loans: Commercial $ 8,838 $ 10,076 $ — One-to-four family residential 1,903 2,032 — Multifamily 626 1,097 — Home equity and lines of credit 15 15 — Total Real Estate 11,382 13,220 — With a Related Allowance Recorded: Real estate loans: Commercial 1,812 2,244 (66) Home equity and lines of credit 32 32 (3) Total Real Estate 1,844 2,276 (69) Commercial and industrial loans 16 16 (4) Total: Real estate loans Commercial 10,650 12,320 (66) One-to-four family residential 1,903 2,032 — Multifamily 626 1,097 — Home equity and lines of credit 47 47 (3) Commercial and industrial loans 16 16 (4) $ 13,242 $ 15,512 $ (73) The following table summarizes the average recorded investment in impaired loans, excluding PCI loans, and interest income recognized as of, and for, the three and six months ended June 30, 2020 (in thousands): For the Three Months Ended For the Six Months Ended June 30, 2020 June 30, 2020 Average Recorded Investment Interest Income Average Recorded Investment Interest Income With No Allowance Recorded: Real estate loans: Commercial $ 14,522 $ 191 $ 15,020 $ 286 One-to-four family residential 2,122 22 2,241 51 Multifamily 854 18 915 31 Home equity and lines of credit 20 — 20 — Commercial and industrial loans 37 — 38 — With a Related Allowance Recorded: Real estate loans: Commercial 2,335 41 1,992 57 One-to-four family residential 261 5 174 10 Home equity and lines of credit 33 — 33 1 Commercial and industrial loans 18 — 18 — Total: Real estate loans Commercial 16,857 232 17,012 343 One-to-four family residential 2,383 27 2,415 61 Multifamily 854 18 915 31 Home equity and lines of credit 53 — 53 1 Commercial and industrial loans 55 — 56 — $ 20,202 $ 277 $ 20,451 $ 436
Troubled Debt Restructurings on Financing Receivables	The following tables summarizes loans that were modified in a TDR during the six months ended June 30, 2020: Six Months Ended June 30, 2020 Number of Relationships Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) (in thousands) Troubled Debt Restructurings Residential 1 $ 187 $ 187 Commercial real estate 2 544 544 Total Troubled Debt Restructurings 3 $ 731 $ 731 (1) Amounts are at time of modification

Allowance for Credit Losses o_2

Allowance for Credit Losses on Loans (“ACL”) (Tables)	6 Months Ended
	Jun. 30, 2021
Credit Loss [Abstract]
Schedule of Allowance for Credit Losses for Off-Balance Sheet credit Exposures	The table below summarizes the allowance for credit losses for off-balance sheet credit exposures (in thousands): Three Months Ended Six Months Ended Balance at beginning of period $ 1,702 $ 808 Impact of CECL adoption — 737 Balance at beginning of period 1,702 1,545 Provision for credit losses 106 263 Balance at end of period $ 1,808 $ 1,808
Allowance For Loan Losses And Loans Receivable By Portfolio Segment Table	The following tables set forth activity in our allowance for credit losses on loans, by loan type, as of, and for the three and six months ended June 30, 2021, and June 30, 2020 (in thousands): Three Months Ended June 30, 2021 Real Estate Commercial (1) One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCD) PCD Total Allowance for loan losses: Beginning balance $ 28,882 $ 5,172 $ 269 $ 643 $ 2,940 $ 9 $ 37,915 $ 5,282 $ 43,197 Charge-offs — — — — (12) — (12) — (12) Recoveries — 1 — 1 7 — 9 — 9 Provisions (credit) (2,342) (563) (10) 19 (341) (2) (3,239) (462) (3,701) Ending balance $ 26,540 $ 4,610 $ 259 $ 663 $ 2,594 $ 7 $ 34,673 $ 4,820 $ 39,493 (1) Commercial includes commercial real estate loans collateralized by owner-occupied, non-owner occupied, and multifamily properties. Three Months Ended June 30, 2020 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCI) PCI Total Allowance for loan losses: Beginning balance $ 5,444 $ 312 $ 671 $ 26,889 $ 574 $ 2,035 $ 86 $ 36,011 $ 789 $ 36,800 Charge-offs (164) — — — — (57) — (221) — (221) Recoveries 13 2 — — — 3 2 20 — 20 Provisions (credit) 1,406 (42) 266 354 (16) (135) 88 1,921 — 1,921 Ending balance $ 6,699 $ 272 $ 937 $ 27,243 $ 558 $ 1,846 $ 176 $ 37,731 $ 789 $ 38,520 Six Months Ended June 30, 2021 Real Estate Commercial (1) One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCD) PCD Total Beginning balance $ 33,005 $ 207 $ 1,214 $ 260 $ 1,842 $ 198 $ 36,726 $ 881 $ 37,607 Impact of CECL adoption (1,949) 5,233 (921) 419 947 (188) 3,541 6,812 10,353 Balance at January 1, 2021 31,056 5,440 293 679 2,789 10 40,267 7,693 47,960 Charge-offs — (21) — — (12) — (33) (2,411) (2,444) Recoveries 19 2 — 1 28 2 52 — 52 Provisions (credit) (4,535) (811) (34) (17) (211) (5) (5,613) (462) (6,075) Ending balance $ 26,540 $ 4,610 $ 259 $ 663 $ 2,594 $ 7 $ 34,673 $ 4,820 $ 39,493 (1) Commercial includes commercial real estate loans collateralized by owner-occupied, non-owner occupied, and multifamily properties. Six Months Ended June 30, 2020 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCI) PCI Total Allowance for loan losses: Beginning balance $ 4,891 $ 180 $ 536 $ 20,203 $ 317 $ 1,640 $ 151 $ 27,918 $ 789 $ 28,707 Charge-offs (597) — — — — (94) — (691) — (691) Recoveries 388 2 — — 1 9 — 400 — 400 Provisions (credit) 2,017 90 401 7,040 240 291 25 10,104 — 10,104 Ending balance $ 6,699 $ 272 $ 937 $ 27,243 $ 558 $ 1,846 $ 176 $ 37,731 $ 789 $ 38,520 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 June 30, 2021 and December 31, 2020 (in thousands): June 30, 2021 Real Estate Commercial (1) One-to-Four Family Construction and Land Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCD) PCD Total Allowance for credit losses on loans: Ending balance: individually evaluated for impairment $ 61 $ 4 $ — $ 2 $ 1 $ — $ 68 $ — $ 68 Ending balance: collectively evaluated for impairment 26,479 4,606 259 661 2,593 7 34,605 4,820 39,425 Loans, net: Ending balance 3,231,916 193,976 63,125 99,814 209,580 2,170 3,800,581 16,692 3,817,273 Ending balance: individually evaluated for impairment 9,716 1,610 1,107 43 14 — 12,490 — 12,490 Ending balance: collectively evaluated for impairment 3,222,200 192,366 62,018 99,771 76,858 2,170 3,655,383 16,692 3,672,075 PPP loans not evaluated for impairment (2) — — — — 132,708 — 132,708 — 132,708 December 31, 2020 Real Estate Commercial One-to-Four Family Construction and Land Multifamily Home Equity and Lines of Credit Commercial and Industrial Other Total Loans (excluding PCI) PCI Total Allowance for credit losses on loans: Ending balance: individually evaluated for impairment $ 66 $ — $ — $ — $ 3 $ 4 $ — $ 73 $ — $ 73 Ending balance: collectively evaluated for impairment 5,944 207 1,214 26,995 257 1,838 198 36,653 881 37,534 Loans, net: Ending balance 717,566 212,222 74,351 2,512,934 93,137 191,481 3,029 3,804,720 18,518 3,823,238 Ending balance: individually evaluated for impairment 10,650 1,903 — 626 47 16 — 13,242 — 13,242 Ending balance: collectively evaluated for impairment 706,916 210,319 74,351 2,512,308 93,090 64,930 3,029 3,664,943 18,518 3,683,461 PPP loans not evaluated for impairment (2) — — — — — 126,535 — 126,535 — 126,535 (1) Commercial includes commercial real estate loans collateralized by owner-occupied, non-owner occupied, and multifamily properties. (2) PPP loans are guaranteed by the SBA and therefore excluded from the allowance for loan losses.

Deposits (Tables)

Deposits (Tables)	6 Months Ended
	Jun. 30, 2021
Deposits [Abstract]
Deposit Account Balances	Deposit account balances are summarized as follows (in thousands): June 30, 2021 December 31, 2020 Non-interest-bearing checking $ 826,823 $ 695,831 NOW and interest-bearing checking 979,788 905,208 Savings and money market 1,788,545 1,953,885 Certificates of deposit 513,113 521,627 Total deposits $ 4,108,269 $ 4,076,551
Interest Expense on Deposits	Interest expense on deposit accounts is summarized for the periods indicated (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 NOW and interest-bearing checking, savings, and money market $ 845 $ 2,894 $ 1,777 $ 6,967 Certificates of deposit 826 4,579 1,764 9,785 Total interest expense on deposit accounts $ 1,671 $ 7,473 $ 3,541 $ 16,752

Equity Incentive Plans (Tables)

Equity Incentive Plans (Tables)	6 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement [Abstract]
Stock Options Outstanding	The following table is a summary of the Company’s stock options outstanding as of June 30, 2021, and changes therein during the six 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, 2020 2,214,193 $ 4.01 $ 13.94 3.96 Forfeited (41,090) 3.96 13.62 — Exercised (138,605) 3.92 13.78 — Outstanding - June 30, 2021 2,034,498 4.01 13.96 3.48 Exercisable - June 30, 2021 2,017,419 4.01 13.94 3.47
Status of the Company's Restricted Share Awards	The following is a summary of the status of the Company’s restricted stock awards at June 30, 2021, and changes therein during the six months then ended. Number of Shares Awarded Weighted Average Grant Date Fair Value Non-vested at December 31, 2020 104,010 $ 15.91 Granted 176,930 12.59 Vested (38,470) 15.81 Forfeited (5,585) 15.28 Non-vested at June 30, 2021 236,885 13.46

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Significant Fair Value of Assets and Liabilities Measured on Recurring and Non Recurring Basis	Fair Value Measurements at June 30, 2021 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: U.S. Government agency $ 2,754 $ — $ 2,754 $ — Mortgage-backed securities: Pass-through certificates: GSE 229,767 — 229,767 — REMICs: GSE 740,378 — 740,378 — 970,145 — 970,145 — Other debt securities: Municipal bonds 78 — 78 — Corporate bonds 124,446 — 124,446 — 124,524 — 124,524 — Total debt securities available-for-sale 1,097,423 — 1,097,423 — Trading securities 12,743 12,743 — — Equity securities 219 219 — — Total $ 1,110,385 $ 12,962 $ 1,097,423 $ — Measured on a non-recurring basis: Assets: Loans individually evaluated for impairment: Real estate loans: Commercial real estate $ 3,799 $ — $ — $ 3,799 One-to-four family residential mortgage 854 — — 854 Multifamily 9 — — 9 Home equity and lines of credit 29 — — 29 Total individually evaluated real estate loans 4,691 — — 4,691 Commercial and industrial loans 14 — — 14 Other real estate owned 100 — — 100 Total $ 4,805 $ — $ — $ 4,805 Fair Value Measurements at December 31, 2020 Using: Carrying Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs (in thousands) Measured on a recurring basis: Assets: Investment securities: Debt securities available-for-sale: U.S. Government agency securities $ 3,158 $ — $ 3,158 $ — Mortgage-backed securities: Pass-through certificates: GSE 281,343 — 281,343 — REMICs: GSE 890,965 — 890,965 — Non-GSE 4 — 4 — 1,172,312 — 1,172,312 — Other debt securities: Municipal bonds 123 — 123 — Corporate bonds 88,418 — 88,418 — Asset-backed securities 794 — 794 — 89,335 — 89,335 — Total debt securities available-for-sale 1,264,805 — 1,264,805 — Trading securities 12,291 12,291 — — Equity securities 253 253 — — Total $ 1,277,349 $ 12,544 $ 1,264,805 $ — Measured on a non-recurring basis: Assets: Impaired loans: Real estate loans: Commercial real estate $ 5,268 $ — $ — $ 5,268 Multifamily 16 — — 16 Home equity and lines of credit 28 — — 28 Total impaired real estate loans 5,312 — — 5,312 Commercial and industrial loans 13 — — 13 Total $ 5,325 $ — $ — $ 5,325
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 June 30, 2021 and December 31, 2020 (dollars in thousands): Fair Value Valuation Methodology Unobservable Range of Inputs June 30, 2021 December 31, 2020 June 30, 2021 December 31, 2020 Individually evaluated loans $ 4,705 $ 5,325 Appraisals Discount for costs to sell 7.0% 7.0% Discount for quick sale 10.0% 10.0% Discounted cash flows Interest rates 4.88% to 6.25% 4.88% to 6.25% Other real estate owned 100 — Appraisals Discount for costs to sell 7.0% N/A
Estimated Fair Values of Significant Financial Instruments	The estimated fair value of the Company’s financial instruments at June 30, 2021 and December 31, 2020, is presented in the following tables (in thousands): June 30, 2021 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 193,184 $ 193,184 $ — $ — $ 193,184 Trading securities 12,743 12,743 — — 12,743 Debt securities available-for-sale 1,097,423 — 1,097,423 — 1,097,423 Debt securities held-to-maturity 6,417 — 6,703 — 6,703 Equity securities 219 219 — — 219 FHLBNY stock, at cost 24,508 — 24,508 — 24,508 Net loans held-for-investment 3,777,780 — — 3,894,985 3,894,985 Derivative assets 788 — 788 — 788 Financial liabilities: Deposits $ 4,108,269 $ — $ 4,112,519 $ — $ 4,112,519 Borrowed funds 470,329 — 481,011 — 481,011 Advance payments by borrowers for taxes and insurance 24,203 — 24,203 — 24,203 Derivative liabilities 790 — 790 — 790 December 31, 2020 Estimated Fair Value Carrying Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 87,544 $ 87,544 $ — $ — $ 87,544 Trading securities 12,291 12,291 — — 12,291 Debt securities available-for-sale 1,264,805 — 1,264,805 — 1,264,805 Debt securities held-to-maturity 7,234 — 7,574 — 7,574 Equity securities 253 253 — — 253 FHLBNY stock, at cost 28,641 — 28,641 — 28,641 Loans held-for-sale 19,895 — — 19,895 19,895 Net loans held-for-investment 3,785,631 — — 3,842,054 3,842,054 Derivative assets 1,498 — 1,498 — 1,498 Financial liabilities: Deposits $ 4,076,551 $ — $ 4,082,538 $ — $ 4,082,538 Borrowed funds 591,789 — 609,900 — 609,900 Advance payments by borrowers for taxes and insurance 19,677 — 19,677 — 19,677 Derivative liabilities 1,502 — 1,502 — 1,502

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Earnings Per Share Calculations and Reconciliation	The following is a summary of the Company’s earnings per share calculations and reconciliation of basic to diluted earnings per share for the periods indicated (in thousands, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Net income available to common stockholders $ 19,794 $ 10,793 $ 38,471 $ 15,344 Weighted average shares outstanding-basic 48,907,585 46,837,473 49,216,157 46,814,647 Effect of non-vested restricted stock and stock options outstanding 400,076 34,017 252,651 112,857 Weighted average shares outstanding-diluted 49,307,661 46,871,490 49,468,808 46,927,504 Earnings per share-basic $ 0.40 $ 0.23 $ 0.78 $ 0.33 Earnings per share-diluted $ 0.40 $ 0.23 $ 0.78 $ 0.33 Anti-dilutive shares 125,744 2,316,695 564,061 1,659,262

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Lease, Cost	Supplemental lease information at or for the six months ended June 30, 2021, and June 30, 2020 is as follows (dollars in thousands): Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Operating lease cost $ 1,453 $ 1,423 $ 2,908 $ 2,862 Variable lease cost 1,010 956 2,245 1,500 Net lease cost $ 2,463 $ 2,379 $ 5,153 $ 4,362 Cash paid for amounts included in measurement of operating lease liabilities $ 1,691 $ 1,524 $ 3,399 $ 3,069 Right-of-use assets obtained in exchange for new operating lease liabilities $ — $ — $ — $ 3,028 Weighted average remaining lease term 12.24 years 12.63 years Weighted average discount rate 3.61 % 3.59 %
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 (in thousands): Year Amount 2021 $ 2,937 2022 5,550 2023 5,504 2024 5,067 2025 4,710 Thereafter 28,196 Total lease payments 51,964 Less: imputed interest 11,243 Present value of lease liabilities $ 40,721

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Schedule of Non-Interest Income	The following table summarizes non-interest income for the periods indicated (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Fees and service charges for customer services: Service charges $ 690 $ 356 $ 1,410 $ 1,109 ATM and card interchange fees 483 275 882 579 Investment fees 154 35 232 98 Total fees and service charges for customer services 1,327 666 2,524 1,786 Income on bank-owned life insurance (1) 857 865 1,705 1,741 Gains on available-for-sale debt securities, net (1) 509 73 606 60 Gains (losses) on trading securities, net (1) 807 1,626 1,171 (366) Gains on sales of loans (1) 1,401 665 1,401 665 Swap income (1) — 308 — 384 Other 15 35 145 76 Total non-interest income $ 4,916 $ 4,238 $ 7,552 $ 4,346 (1) Not in scope of Topic 606

Derivatives (Tables)

Derivatives (Tables)	6 Months Ended
	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Liabilities at Fair Value	The table below presents the fair value of the derivatives as well as their location on the consolidated balance sheets (in thousands): Fair Value Balance Sheet Location June 30, 2021 December 31, 2020 Other assets $ 788 $ 1,498 Other liabilities 790 1,502
Schedule of Derivative Assets at Fair Value	The table below presents the fair value of the derivatives as well as their location on the consolidated balance sheets (in thousands): Fair Value Balance Sheet Location June 30, 2021 December 31, 2020 Other assets $ 788 $ 1,498 Other liabilities 790 1,502

Consolidated Financial Statem_3

Consolidated Financial Statements - Narrative (Details) $ in Thousands	Dec. 31, 2020USD ($)	Jun. 30, 2021USD ($)loan	Jun. 30, 2021USD ($)loan	Mar. 31, 2021USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Unusual or Infrequent Item, or Both [Line Items]
Allowance for credit loss	$ 37,607	$ 39,493	$ 39,493	$ 43,197	$ 38,520	$ 36,800	$ 28,707
Unfounded credit commitment	808	1,808	1,808	1,702
Financing receivable	3,823,238	3,817,273	3,817,273
Net loans held-for-investment	3,785,631	$ 3,777,780	3,777,780
Cumulative Effect, Period of Adoption, Adjustment
Unusual or Infrequent Item, or Both [Line Items]
Increase in allowance for credit losses	11,100
Allowance for credit loss	10,353
Unfounded credit commitment	737			$ 0
PCD loan related reserves	6,800
Non-PCD loan related reserves	$ 4,300
COVID-19
Unusual or Infrequent Item, or Both [Line Items]
Loan modification program, payment deferral period		90 days
Loan modification program, extension for payment deferral period		90 days
Net loans held-for-investment		$ 21,500	21,500
COVID-19
Unusual or Infrequent Item, or Both [Line Items]
Financing receivable		$ 232,200	$ 232,200
Number of loans approved | loan		2,300	2,300
Net loans held-for-investment		$ 132,700	$ 132,700
Loan processing fee		9,500	9,500
Loan processing fee recognized as earnings		$ 2,800	$ 4,700
Number of loans outstanding | loan		1,453	1,453

Business Combinations - Additio

Business Combinations - Additional Information (Details) $ in Thousands	Jul. 01, 2020USD ($)loanlease_obligationshares	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Business Acquisition [Line Items]
Total assets		$ 5,426,910	$ 5,514,544
Net loans held-for-investment		3,777,780	3,785,631
Deposits		4,108,269	4,076,551
Operating lease liabilities		40,721	42,734
Operating lease right-of-use assets		34,574	$ 36,741
Victory
Business Acquisition [Line Items]
Total assets	$ 402,800
Net loans held-for-investment	180,400
Deposits	$ 354,600
Number of branches | loan	6
Victory
Business Acquisition [Line Items]
Common stock exchange rate (shares) | shares	2.0463
Adjustment to the carrying value of goodwill		304
Adjustment to deferred tax assets		$ 304
Number of lease obligations | lease_obligation	5
Operating lease liabilities	$ 2,500
Operating lease right-of-use assets	$ 2,500

Business Combinations - Fair Va

Business Combinations - Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jul. 01, 2020
Liabilities assumed:
Goodwill recorded in the merger	$ 41,012	$ 41,320
Victory
Business Acquisition [Line Items]
Total Purchase Price			$ 41,173
Assets acquired:
Cash and cash equivalents			72,875
Debt securities available for sale			126,931
Loans			180,431
Accrued interest receivable			1,415
Bank-owned life insurance			5,714
Premises and equipment			7,789
Other assets			5,010
Total assets acquired			400,165
Liabilities assumed:
Deposits			354,592
Other liabilities			7,001
Total liabilities assumed			361,593
Net assets acquired			38,572
Goodwill recorded in the merger			$ 2,601

Business Combinations - Summary

Business Combinations - Summary of Credit Impaired Loans Acquired (Details) - Victory $ in Thousands	Jul. 01, 2020USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest	$ 7,809
Contractual cash flows not expected to be collected (non-accretable discount)	3,315
Expected cash flows to be collected at acquisition	4,494
Interest component of expected cash flows (accretable yield)	(599)
Fair value of acquired loans	$ 3,895

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	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 1,083,047	$ 1,246,673
Gross unrealized gains	15,315	18,862
Gross unrealized losses	(939)	(730)
Estimated fair value	1,097,423	1,264,805
U.S. Government agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	2,758	3,168
Gross unrealized gains	0	0
Gross unrealized losses	(4)	(10)
Estimated fair value	2,754	3,158
Real estate mortgage investment conduits (REMICs)
Debt Securities, Available-for-sale [Line Items]
Amortized cost	956,534	1,155,285
Gross unrealized gains	14,499	17,747
Gross unrealized losses	(888)	(720)
Estimated fair value	970,145	1,172,312
Other debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	123,755	88,220
Gross unrealized gains	816	1,115
Gross unrealized losses	(47)	0
Estimated fair value	124,524	89,335
GSE | Pass-through Certificates
Debt Securities, Available-for-sale [Line Items]
Amortized cost	221,513	270,867
Gross unrealized gains	8,640	10,720
Gross unrealized losses	(386)	(244)
Estimated fair value	229,767	281,343
GSE | Real estate mortgage investment conduits (REMICs)
Debt Securities, Available-for-sale [Line Items]
Amortized cost	735,021	884,414
Gross unrealized gains	5,859	7,027
Gross unrealized losses	(502)	(476)
Estimated fair value	740,378	890,965
Non-GSE | Real estate mortgage investment conduits (REMICs)
Debt Securities, Available-for-sale [Line Items]
Amortized cost		4
Gross unrealized gains		0
Gross unrealized losses		0
Estimated fair value		4
Municipal bonds | Other debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	77	122
Gross unrealized gains	1	1
Gross unrealized losses	0	0
Estimated fair value	78	123
Corporate bonds | Other debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	123,678	87,319
Gross unrealized gains	815	1,099
Gross unrealized losses	(47)	0
Estimated fair value	$ 124,446	88,418
Asset-backed securities | Other debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost		779
Gross unrealized gains		15
Gross unrealized losses		0
Estimated fair value		$ 794

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	Jun. 30, 2021	Dec. 31, 2020
Amortized cost
Amortized cost	$ 1,083,047	$ 1,246,673
Estimated fair value
Estimated fair value	1,097,423	$ 1,264,805
Other Than Mortgage Backed Securities
Amortized cost
Due in one year or less	35,282
Due after one year through five years	73,463
Due after five years through ten years	17,768
Amortized cost	126,513
Estimated fair value
Due in one year or less	35,757
Due after one year through five years	73,804
Due after five years through ten years	17,717
Estimated fair value	$ 127,278

Debt Securities Available-for_5

Debt Securities Available-for-Sale - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)security	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)security	Jun. 30, 2020USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, restricted	$ 557,000		$ 557,000
Debt securities, available-for-sale, realized gain	509	$ 74	606	$ 74
Debt securities, available-for-sale, realized loss	0	1	0	14
Proceeds from sales and calls of debt securities available-for-sale	89,600	12,600	95,472	12,623
Debt securities, trading, realized gain (loss)	807	$ 1,600	1,200	$ (366)
Accrued interest receivable associated with debt securities available-for-sale	$ 1,900		$ 1,900
Real Estate Mortgage Investment Conduits (REMICs) | GSE
Debt Securities, Available-for-sale [Line Items]
Number of debt securities, unrealized loss position less than 12 months | security	1		1
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 | security	9		9
Number of debt securities, unrealized loss position less than 12 months | security	17		17
Real Estate Mortgage Investment Conduits (REMICs) | GSE | Non Pass Through
Debt Securities, Available-for-sale [Line Items]
Number of debt securities, unrealized loss position less than 12 months | security	41		41
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 | security	2		2

Debt Securities Available-for_6

Debt Securities Available-for-Sale - Gross Unrealized Losses on Mortgage-Backed Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Unrealized losses, less than 12 months	$ (931)	$ (719)
Estimated fair value, less than 12 months	173,513	242,146
Unrealized losses, 12 months or more	(8)	(11)
Estimated fair value, 12 months or more	383	459
Unrealized losses, total	(939)	(730)
Estimated fair value, total	173,896	242,605
U.S. Government agency securities
Debt Securities, Available-for-sale [Line Items]
Unrealized losses, less than 12 months	(4)	(10)
Estimated fair value, less than 12 months	2,754	3,158
Unrealized losses, 12 months or more	0	0
Estimated fair value, 12 months or more	0	0
Unrealized losses, total	(4)	(10)
Estimated fair value, total	2,754	3,158
GSE | Pass-through Certificates
Debt Securities, Available-for-sale [Line Items]
Unrealized losses, less than 12 months	(378)	(233)
Estimated fair value, less than 12 months	31,540	28,419
Unrealized losses, 12 months or more	(8)	(11)
Estimated fair value, 12 months or more	383	459
Unrealized losses, total	(386)	(244)
Estimated fair value, total	31,923	28,878
GSE | Real estate mortgage investment conduits (REMICs)
Debt Securities, Available-for-sale [Line Items]
Unrealized losses, less than 12 months	(502)	(476)
Estimated fair value, less than 12 months	124,255	210,569
Unrealized losses, 12 months or more	0	0
Estimated fair value, 12 months or more	0	0
Unrealized losses, total	(502)	(476)
Estimated fair value, total	124,255	$ 210,569
Corporate bonds | Other debt securities
Debt Securities, Available-for-sale [Line Items]
Unrealized losses, less than 12 months	(47)
Estimated fair value, less than 12 months	14,964
Unrealized losses, 12 months or more	0
Estimated fair value, 12 months or more	0
Unrealized losses, total	(47)
Estimated fair value, total	$ 14,964

Debt Securities Held-to-Matur_3

Debt Securities Held-to-Maturity - Mortgage Backed Securities Held-to-Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 6,417	$ 7,234
Gross Unrealized Gains	286	340
Gross Unrealized Losses	0	0
Estimated Fair Value	6,703	7,574
Mortgage Backed Securities Pass Through Certificates
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	6,417	7,234
Gross Unrealized Gains	286	340
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 6,703	$ 7,574

Debt Securities Held-to-Matur_4

Debt Securities Held-to-Maturity - Additional Information (Details) security in Millions	6 Months Ended
	Jun. 30, 2021USD ($)security	Jun. 30, 2020USD ($)	Dec. 31, 2020security
Investments, Debt and Equity Securities [Abstract]
Held-to-maturity securities sold	$ 0	$ 0
Held-to-maturity securities pledged to secure borrowings and deposits	$ 6,400,000
Held-to-maturity securities unrealized loss position | security	0		0
Allowance for credit losses	$ 0
Accrued interest receivable associated with held-to-maturity securities	$ 19,400

Equity Securities (Details)

Equity Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Equity securities	$ 219	$ 253

Loans - Net Loans Held-for-Inve

Loans - Net Loans Held-for-Investment (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Loans held-for-investment, net	$ 3,817,273		$ 3,823,238
Less: allowance for loan losses	(39,493)	$ (43,197)	(37,607)	$ (38,520)	$ (36,800)	$ (28,707)
Net loans held-for-investment	3,777,780		3,785,631
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Loans and Leases Receivable Disclosure [Line Items]
Deferred origination loan costs, net	0		4,795
Loans held-for-investment, net	3,800,581		3,804,720
Less: allowance for loan losses	(34,673)	(37,915)	(36,726)	(37,731)	(36,011)	(27,918)
PCD/PCI loans
Loans and Leases Receivable Disclosure [Line Items]
Loans held-for-investment, net	16,692		18,518
Less: allowance for loan losses	(4,820)	(5,282)	(881)	(789)	(789)
Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,588,831		3,602,544
Loans held-for-investment, net	3,588,831		3,610,210
Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Multifamily
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,496,613		2,509,310
Loans held-for-investment, net	2,496,613		2,512,934
Less: allowance for loan losses				(27,243)	(26,889)	(20,203)
Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	735,303		716,973
Loans held-for-investment, net	735,303		717,566
Less: allowance for loan losses				(6,699)	(5,444)	(4,891)
Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | One-to-four family residential mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	193,976		210,817
Loans held-for-investment, net	193,976		212,222
Less: allowance for loan losses	(4,610)	(5,172)	(207)	(272)	(312)	(180)
Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Home equity and lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans	99,814		91,126
Loans held-for-investment, net	99,814		93,137
Less: allowance for loan losses	(663)	(643)	(260)	(558)	(574)	(317)
Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Construction and land
Loans and Leases Receivable Disclosure [Line Items]
Loans	63,125		74,318
Loans held-for-investment, net	63,125		74,351
Less: allowance for loan losses	(259)	(269)	(1,214)	(937)	(671)	(536)
Commercial and industrial and other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Loans and Leases Receivable Disclosure [Line Items]
Loans	211,750		197,381
Commercial and industrial loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Loans and Leases Receivable Disclosure [Line Items]
Loans	209,580		194,352
Loans held-for-investment, net	209,580		191,481
Less: allowance for loan losses	(2,594)	(2,940)	(1,842)	(1,846)	(2,035)	(1,640)
Other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,170		3,029
Loans held-for-investment, net	2,170		3,029
Less: allowance for loan losses	(7)	$ (9)	(198)	$ (176)	$ (86)	$ (151)
Paycheck Protection Program | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 132,700		$ 126,500

Loans - Narrative, Loans Held-f

Loans - Narrative, Loans Held-for-Investment (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	$ 0	$ 19,895
PCI loans	$ 3,817,273	$ 3,823,238
One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of PCI loans	17.00%	22.00%
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of PCI loans	25.00%	23.00%
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of PCI loans	45.00%	40.00%
PCD/PCI loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	$ 16,692	$ 18,518

Loans - Loans Held-for-Investme

Loans - Loans Held-for-Investment, Excluding PCD Loans, Net of Deferred Fees and Costs (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held-for-investment, net	$ 3,817,273	$ 3,823,238
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	541,859
2020	727,022
2019	512,741
2018	458,860
2017	351,989
Prior	1,127,297
Revolving Loans	80,813
Loans held-for-investment, net	3,800,581	3,804,720
Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held-for-investment, net		3,731,891
Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held-for-investment, net		24,145
Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held-for-investment, net		48,684
Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	447,872
2020	654,203
2019	503,547
2018	453,318
2017	350,487
Prior	1,111,392
Revolving Loans	68,012
Loans held-for-investment, net	3,588,831	3,610,210
Real estate loans: | Multifamily | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	370,670
2020	548,666
2019	365,183
2018	325,462
2017	259,515
Prior	626,621
Revolving Loans	496
Loans held-for-investment, net	2,496,613	2,512,934
Real estate loans: | Multifamily | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	370,670
2020	548,666
2019	360,502
2018	323,853
2017	259,515
Prior	617,290
Revolving Loans	496
Loans held-for-investment, net	2,480,992	2,497,556
Real estate loans: | Multifamily | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	442
Revolving Loans	0
Loans held-for-investment, net	442	458
Real estate loans: | Multifamily | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	0
2019	4,681
2018	1,609
2017	0
Prior	8,889
Revolving Loans	0
Loans held-for-investment, net	15,179	14,920
Real estate loans: | Commercial mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	53,671
2020	74,958
2019	109,571
2018	101,319
2017	71,207
Prior	311,163
Revolving Loans	13,414
Loans held-for-investment, net	735,303	717,566
Real estate loans: | Commercial mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	53,671
2020	74,958
2019	99,407
2018	101,009
2017	68,317
Prior	291,092
Revolving Loans	10,046
Loans held-for-investment, net	698,500	667,568
Real estate loans: | Commercial mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	0
2019	511
2018	0
2017	500
Prior	9,064
Revolving Loans	0
Loans held-for-investment, net	10,075	20,422
Real estate loans: | Commercial mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	0
2019	9,653
2018	310
2017	2,390
Prior	11,007
Revolving Loans	3,368
Loans held-for-investment, net	26,728	29,576
Real estate loans: | One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	2,405
2020	9,483
2019	13,481
2018	15,294
2017	12,669
Prior	140,028
Revolving Loans	616
Loans held-for-investment, net	193,976	212,222
Real estate loans: | One-to-four family residential mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	2,405
2020	9,483
2019	12,488
2018	15,294
2017	12,669
Prior	134,622
Revolving Loans	616
Loans held-for-investment, net	187,577	207,633
Real estate loans: | One-to-four family residential mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	0
2019	467
2018	0
2017	0
Prior	2,399
Revolving Loans	0
Loans held-for-investment, net	2,866	2,456
Real estate loans: | One-to-four family residential mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	0
2019	526
2018	0
2017	0
Prior	3,007
Revolving Loans	0
Loans held-for-investment, net	3,533	2,133
Real estate loans: | Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	1,570
2019	1,396
2018	535
2017	2,611
Prior	3,589
Revolving Loans	53,424
Loans held-for-investment, net	63,125	74,351
Real estate loans: | Construction and land | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	1,570
2019	1,396
2018	535
2017	2,611
Prior	3,589
Revolving Loans	52,317
Loans held-for-investment, net	62,018	74,351
Real estate loans: | Construction and land | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held-for-investment, net		0
Real estate loans: | Construction and land | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving Loans	1,107
Loans held-for-investment, net	1,107	0
Real estate loans: | Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	21,126
2020	19,526
2019	13,916
2018	10,708
2017	4,485
Prior	29,991
Revolving Loans	62
Loans held-for-investment, net	99,814	93,137
Real estate loans: | Home equity and lines of credit | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	21,126
2020	19,526
2019	13,818
2018	10,621
2017	4,485
Prior	29,503
Revolving Loans	62
Loans held-for-investment, net	99,141	92,385
Real estate loans: | Home equity and lines of credit | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	304
Revolving Loans	0
Loans held-for-investment, net	304	311
Real estate loans: | Home equity and lines of credit | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	0
2019	98
2018	87
2017	0
Prior	184
Revolving Loans	0
Loans held-for-investment, net	369	441
Commercial and industrial loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	92,179
2020	72,638
2019	9,168
2018	5,498
2017	1,497
Prior	15,799
Revolving Loans	12,801
Loans held-for-investment, net	209,580	191,481
Commercial and industrial loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	92,179
2020	72,076
2019	8,684
2018	4,549
2017	1,352
Prior	14,654
Revolving Loans	12,801
Loans held-for-investment, net	206,295	189,372
Commercial and industrial loans | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	72
2019	160
2018	238
2017	145
Prior	283
Revolving Loans	0
Loans held-for-investment, net	898	498
Commercial and industrial loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	490
2019	324
2018	711
2017	0
Prior	862
Revolving Loans	0
Loans held-for-investment, net	2,387	1,611
Other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	1,808
2020	181
2019	26
2018	44
2017	5
Prior	106
Revolving Loans	0
Loans held-for-investment, net	2,170	3,029
Other loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	1,808
2020	181
2019	26
2018	44
2017	5
Prior	103
Revolving Loans	0
Loans held-for-investment, net	2,167	3,026
Other loans | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held-for-investment, net		0
Other loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	3
Revolving Loans	0
Loans held-for-investment, net	$ 3	$ 3

Loans - Investment of Originate

Loans - Investment of Originated Loans Held-for-Investment by Loan Type and Credit Quality Indicator (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	$ 3,817,273	$ 3,823,238
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	3,800,581	3,804,720
Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	3,588,831	3,610,210
Commercial and industrial loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	209,580	191,481
Other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	2,170	3,029
Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net		3,731,891
Pass | Commercial and industrial loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	206,295	189,372
Pass | Other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	2,167	3,026
Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net		24,145
Special Mention | Commercial and industrial loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	898	498
Special Mention | Other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net		0
Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net		48,684
Substandard | Commercial and industrial loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	2,387	1,611
Substandard | Other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	3	3
Multifamily | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	2,496,613	2,512,934
Multifamily | Pass | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	2,480,992	2,497,556
Multifamily | Special Mention | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	442	458
Multifamily | Substandard | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	15,179	14,920
Commercial mortgage | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	735,303	717,566
Commercial mortgage | Pass | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	698,500	667,568
Commercial mortgage | Special Mention | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	10,075	20,422
Commercial mortgage | Substandard | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	26,728	29,576
One-to-Four Family | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	193,976	212,222
One-to-Four Family | Pass | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	187,577	207,633
One-to-Four Family | Special Mention | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	2,866	2,456
One-to-Four Family | Substandard | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	3,533	2,133
Construction and land | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	63,125	74,351
Construction and land | Pass | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	62,018	74,351
Construction and land | Special Mention | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net		0
Construction and land | Substandard | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	1,107	0
Home equity and lines of credit | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	99,814	93,137
Home equity and lines of credit | Pass | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	99,141	92,385
Home equity and lines of credit | Special Mention | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	304	311
Home equity and lines of credit | Substandard | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans held-for-investment, net	$ 369	$ 441

Loans - Narrative, Past Due and

Loans - Narrative, Past Due and Non-Accrual Loans (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Receivables [Abstract]
Non-accrual loans	$ 8,124,000	$ 8,500,000
Criteria days for delinquent status	90 days	90 days
Principal balance of loans on non accrual status, less then	$ 500,000
Impairment of loans	4,900,000	$ 5,500,000
Loans on non accrual status with principal balances below threshold definition of an impaired loan	3,200,000	3,000,000
90 days or more past due and accruing	731,000	1,100,000
Loans held-for-sale	$ 0	$ 19,895,000

Loans - Details and Delinquency

Loans - Details and Delinquency Status Of Nonperforming Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	$ 3,817,273	$ 3,823,238
Non-accrual loans	8,124	8,500
90 Days or More Past Due and Accruing	731	1,100
Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	5,028
Real estate loans: | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	320
Real estate loans: | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,107
Real estate loans: | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,131
Real estate loans: | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	128
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	407
Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	3
Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	8,855	9,629
Non-accrual loans	8,124	8,516
90 Days or More Past Due and Accruing	731	1,113
Non-Performing Loans | Real estate loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	8,251	9,153
Non-accrual loans	7,714	8,479
90 Days or More Past Due and Accruing	537	674
Non-Performing Loans | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	5,244	6,729
Non-accrual loans	5,028	6,229
90 Days or More Past Due and Accruing	216	500
Non-Performing Loans | Real estate loans: | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	543	1,080
Non-accrual loans	320	906
90 Days or More Past Due and Accruing	223	174
Non-Performing Loans | Real estate loans: | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,107
Non-accrual loans	1,107
90 Days or More Past Due and Accruing	0
Non-Performing Loans | Real estate loans: | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,131	1,153
Non-accrual loans	1,131	1,153
90 Days or More Past Due and Accruing	0	0
Non-Performing Loans | Real estate loans: | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	226	191
Non-accrual loans	128	191
90 Days or More Past Due and Accruing	98	0
Non-Performing Loans | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	601	473
Non-accrual loans	407	37
90 Days or More Past Due and Accruing	194	436
Non-Performing Loans | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3	3
Non-accrual loans	3	0
90 Days or More Past Due and Accruing	0	3
Non-Performing Loans | Substandard | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	5,244	6,229
Non-accrual loans	5,028	6,229
90 Days or More Past Due and Accruing	216	0
Non-Performing Loans | Substandard | Real estate loans: | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	543	1,080
Non-accrual loans	320	906
90 Days or More Past Due and Accruing	223	174
Non-Performing Loans | Substandard | Real estate loans: | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,107
Non-accrual loans	1,107
90 Days or More Past Due and Accruing	0
Non-Performing Loans | Substandard | Real estate loans: | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,131	1,153
Non-accrual loans	1,131	1,153
90 Days or More Past Due and Accruing	0	0
Non-Performing Loans | Substandard | Real estate loans: | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	226	191
Non-accrual loans	128	191
90 Days or More Past Due and Accruing	98	0
Non-Performing Loans | Substandard | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	601	287
Non-accrual loans	407	37
90 Days or More Past Due and Accruing	194	250
Non-Performing Loans | Substandard | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3
Non-accrual loans	3
90 Days or More Past Due and Accruing	0
Non-Performing Loans | Pass | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		500
Non-accrual loans		0
90 Days or More Past Due and Accruing		500
Non-Performing Loans | Pass | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		101
Non-accrual loans		0
90 Days or More Past Due and Accruing		101
Non-Performing Loans | Pass | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		3
Non-accrual loans		0
90 Days or More Past Due and Accruing		3
Non-Performing Loans | Special Mention | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		85
Non-accrual loans		0
90 Days or More Past Due and Accruing		85
Non-Performing Loans | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,840	3,302
Non-Performing Loans | Current | Real estate loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,805	3,302
Non-Performing Loans | Current | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,805	2,829
Non-Performing Loans | Current | Real estate loans: | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	413
Non-Performing Loans | Current | Real estate loans: | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0
Non-Performing Loans | Current | Real estate loans: | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | Current | Real estate loans: | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	60
Non-Performing Loans | Current | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	35	0
Non-Performing Loans | Current | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | Current | Substandard | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,805	2,829
Non-Performing Loans | Current | Substandard | Real estate loans: | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	413
Non-Performing Loans | Current | Substandard | Real estate loans: | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0
Non-Performing Loans | Current | Substandard | Real estate loans: | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | Current | Substandard | Real estate loans: | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	60
Non-Performing Loans | Current | Substandard | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	35	0
Non-Performing Loans | Current | Substandard | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0
Non-Performing Loans | Current | Pass | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Non-Performing Loans | Current | Pass | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Non-Performing Loans | Current | Pass | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Non-Performing Loans | Current | Special Mention | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Non-Performing Loans | 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	74	537
Non-Performing Loans | 30-89 Days Past Due | Real estate loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	74	537
Non-Performing Loans | 30-89 Days Past Due | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	74	537
Non-Performing Loans | 30-89 Days Past Due | Real estate loans: | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | 30-89 Days Past Due | Real estate loans: | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0
Non-Performing Loans | 30-89 Days Past Due | Real estate loans: | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | 30-89 Days Past Due | Real estate loans: | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | 30-89 Days Past Due | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | 30-89 Days Past Due | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	74	537
Non-Performing Loans | 30-89 Days Past Due | Substandard | Real estate loans: | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Real estate loans: | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Real estate loans: | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Real estate loans: | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Non-Performing Loans | 30-89 Days Past Due | Substandard | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0
Non-Performing Loans | 30-89 Days Past Due | Pass | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Non-Performing Loans | 30-89 Days Past Due | Pass | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Non-Performing Loans | 30-89 Days Past Due | Pass | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Non-Performing Loans | 30-89 Days Past Due | Special Mention | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Non-Performing Loans | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	5,210	4,677
Non-Performing Loans | 90 Days or More Past Due | Real estate loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	4,835	4,640
Non-Performing Loans | 90 Days or More Past Due | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,149	2,863
Non-Performing Loans | 90 Days or More Past Due | Real estate loans: | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	320	493
Non-Performing Loans | 90 Days or More Past Due | Real estate loans: | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,107
Non-Performing Loans | 90 Days or More Past Due | Real estate loans: | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,131	1,153
Non-Performing Loans | 90 Days or More Past Due | Real estate loans: | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	128	131
Non-Performing Loans | 90 Days or More Past Due | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	372	37
Non-Performing Loans | 90 Days or More Past Due | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3	0
Non-Performing Loans | 90 Days or More Past Due | Substandard | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,149	2,863
Non-Performing Loans | 90 Days or More Past Due | Substandard | Real estate loans: | One-to-four family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	320	493
Non-Performing Loans | 90 Days or More Past Due | Substandard | Real estate loans: | Construction and land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,107
Non-Performing Loans | 90 Days or More Past Due | Substandard | Real estate loans: | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,131	1,153
Non-Performing Loans | 90 Days or More Past Due | Substandard | Real estate loans: | Home equity and lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	128	131
Non-Performing Loans | 90 Days or More Past Due | Substandard | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	372	37
Non-Performing Loans | 90 Days or More Past Due | Substandard | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	$ 3
Non-Performing Loans | 90 Days or More Past Due | Pass | Real estate loans: | Commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Non-Performing Loans | 90 Days or More Past Due | Pass | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Non-Performing Loans | 90 Days or More Past Due | Pass | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Non-Performing Loans | 90 Days or More Past Due | Special Mention | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		$ 0

Loans - Loans Held-for-Invest_2

Loans - Loans Held-for-Investment by Performing and Non-Performing Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	$ 3,817,273	$ 3,823,238
90 Days or More Past Due and Accruing	731	1,100
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3,800,581	3,804,720
90 Days or More Past Due and Accruing	731	1,113
Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		3,731,891
Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		24,145
Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		48,684
Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3,588,831	3,610,210
90 Days or More Past Due and Accruing	537	674
Real estate loans: | Commercial mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	735,303	717,566
90 Days or More Past Due and Accruing	216	500
Real estate loans: | Commercial mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	698,500	667,568
90 Days or More Past Due and Accruing	0	500
Real estate loans: | Commercial mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	10,075	20,422
90 Days or More Past Due and Accruing	0	0
Real estate loans: | Commercial mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	26,728	29,576
90 Days or More Past Due and Accruing	216	0
Real estate loans: | One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	193,976	212,222
90 Days or More Past Due and Accruing	223	174
Real estate loans: | One-to-four family residential mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	187,577	207,633
90 Days or More Past Due and Accruing	0	0
Real estate loans: | One-to-four family residential mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,866	2,456
90 Days or More Past Due and Accruing	0	0
Real estate loans: | One-to-four family residential mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3,533	2,133
90 Days or More Past Due and Accruing	223	174
Real estate loans: | Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	63,125	74,351
90 Days or More Past Due and Accruing	0	0
Real estate loans: | Construction and land | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	62,018	74,351
90 Days or More Past Due and Accruing	0	0
Real estate loans: | Construction and land | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Real estate loans: | Construction and land | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,107	0
90 Days or More Past Due and Accruing	0
Real estate loans: | Multifamily | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,496,613	2,512,934
90 Days or More Past Due and Accruing	0	0
Real estate loans: | Multifamily | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,480,992	2,497,556
90 Days or More Past Due and Accruing	0	0
Real estate loans: | Multifamily | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	442	458
90 Days or More Past Due and Accruing	0	0
Real estate loans: | Multifamily | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	15,179	14,920
90 Days or More Past Due and Accruing	0	0
Real estate loans: | Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	99,814	93,137
90 Days or More Past Due and Accruing	98	0
Real estate loans: | Home equity and lines of credit | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	99,141	92,385
90 Days or More Past Due and Accruing	0	0
Real estate loans: | Home equity and lines of credit | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	304	311
90 Days or More Past Due and Accruing	0	0
Real estate loans: | Home equity and lines of credit | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	369	441
90 Days or More Past Due and Accruing	98	0
Commercial and industrial loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	209,580	191,481
90 Days or More Past Due and Accruing	194	436
Commercial and industrial loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	206,295	189,372
90 Days or More Past Due and Accruing	0	101
Commercial and industrial loans | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	898	498
90 Days or More Past Due and Accruing	0	85
Commercial and industrial loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,387	1,611
90 Days or More Past Due and Accruing	194	250
Other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,170	3,029
90 Days or More Past Due and Accruing	0	3
Other loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,167	3,026
90 Days or More Past Due and Accruing	0	3
Other loans | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net		0
Other loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3	3
90 Days or More Past Due and Accruing	0	0
30-89 Days Past Due | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	5,958	14,519
30-89 Days Past Due | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	5,836	13,748
30-89 Days Past Due | Real estate loans: | Commercial mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,728	9,329
30-89 Days Past Due | Real estate loans: | Commercial mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	6,072
30-89 Days Past Due | Real estate loans: | Commercial mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	72
30-89 Days Past Due | Real estate loans: | Commercial mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,728	3,185
30-89 Days Past Due | Real estate loans: | One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,219	1,152
30-89 Days Past Due | Real estate loans: | One-to-four family residential mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	292	282
30-89 Days Past Due | Real estate loans: | One-to-four family residential mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	927	870
30-89 Days Past Due | Real estate loans: | One-to-four family residential mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
30-89 Days Past Due | Real estate loans: | Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	994
30-89 Days Past Due | Real estate loans: | Construction and land | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	994
30-89 Days Past Due | Real estate loans: | Construction and land | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0
30-89 Days Past Due | Real estate loans: | Multifamily | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,686	1,893
30-89 Days Past Due | Real estate loans: | Multifamily | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	616	1,283
30-89 Days Past Due | Real estate loans: | Multifamily | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
30-89 Days Past Due | Real estate loans: | Multifamily | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,070	610
30-89 Days Past Due | Real estate loans: | Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	203	380
30-89 Days Past Due | Real estate loans: | Home equity and lines of credit | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	199	80
30-89 Days Past Due | Real estate loans: | Home equity and lines of credit | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	200
30-89 Days Past Due | Real estate loans: | Home equity and lines of credit | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	4	100
30-89 Days Past Due | Commercial and industrial loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	122	760
30-89 Days Past Due | Commercial and industrial loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	122	632
30-89 Days Past Due | Commercial and industrial loans | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	61
30-89 Days Past Due | Commercial and industrial loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	67
30-89 Days Past Due | Other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	11
30-89 Days Past Due | Other loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	11
30-89 Days Past Due | Other loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	5,209	4,677
90 Days or More Past Due | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	4,834	4,640
90 Days or More Past Due | Real estate loans: | Commercial mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,148	2,863
90 Days or More Past Due | Real estate loans: | Commercial mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Real estate loans: | Commercial mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Real estate loans: | Commercial mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,148	2,863
90 Days or More Past Due | Real estate loans: | One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	320	493
90 Days or More Past Due | Real estate loans: | One-to-four family residential mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Real estate loans: | One-to-four family residential mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Real estate loans: | One-to-four family residential mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	320	493
90 Days or More Past Due | Real estate loans: | Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,107	0
90 Days or More Past Due | Real estate loans: | Construction and land | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Real estate loans: | Construction and land | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,107
90 Days or More Past Due | Real estate loans: | Multifamily | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,131	1,153
90 Days or More Past Due | Real estate loans: | Multifamily | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Real estate loans: | Multifamily | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Real estate loans: | Multifamily | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,131	1,153
90 Days or More Past Due | Real estate loans: | Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	128	131
90 Days or More Past Due | Real estate loans: | Home equity and lines of credit | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Real estate loans: | Home equity and lines of credit | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Real estate loans: | Home equity and lines of credit | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	128	131
90 Days or More Past Due | Commercial and industrial loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	372	37
90 Days or More Past Due | Commercial and industrial loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Commercial and industrial loans | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Commercial and industrial loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	372	37
90 Days or More Past Due | Other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3	0
90 Days or More Past Due | Other loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
90 Days or More Past Due | Other loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3	0
Total Past Due | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	11,898	20,309
Total Past Due | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	11,207	19,062
Total Past Due | Real estate loans: | Commercial mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	5,092	12,692
Total Past Due | Real estate loans: | Commercial mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	6,572
Total Past Due | Real estate loans: | Commercial mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	72
Total Past Due | Real estate loans: | Commercial mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	5,092	6,048
Total Past Due | Real estate loans: | One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,762	1,819
Total Past Due | Real estate loans: | One-to-four family residential mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	292	282
Total Past Due | Real estate loans: | One-to-four family residential mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	927	870
Total Past Due | Real estate loans: | One-to-four family residential mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	543	667
Total Past Due | Real estate loans: | Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,107	994
Total Past Due | Real estate loans: | Construction and land | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	994
Total Past Due | Real estate loans: | Construction and land | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,107
Total Past Due | Real estate loans: | Multifamily | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,817	3,046
Total Past Due | Real estate loans: | Multifamily | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	616	1,283
Total Past Due | Real estate loans: | Multifamily | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	0
Total Past Due | Real estate loans: | Multifamily | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,201	1,763
Total Past Due | Real estate loans: | Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	429	511
Total Past Due | Real estate loans: | Home equity and lines of credit | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	199	80
Total Past Due | Real estate loans: | Home equity and lines of credit | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	200
Total Past Due | Real estate loans: | Home equity and lines of credit | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	230	231
Total Past Due | Commercial and industrial loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	688	1,233
Total Past Due | Commercial and industrial loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	122	733
Total Past Due | Commercial and industrial loans | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	146
Total Past Due | Commercial and industrial loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	566	354
Total Past Due | Other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3	14
Total Past Due | Other loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0	14
Total Past Due | Other loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3	0
Current | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3,788,683	3,784,411
Current | Real estate loans: | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	3,577,624	3,591,148
Current | Real estate loans: | Commercial mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	730,211	704,874
Current | Real estate loans: | Commercial mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	698,500	660,996
Current | Real estate loans: | Commercial mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	10,075	20,350
Current | Real estate loans: | Commercial mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	21,636	23,528
Current | Real estate loans: | One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	192,214	210,403
Current | Real estate loans: | One-to-four family residential mortgage | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	187,285	207,351
Current | Real estate loans: | One-to-four family residential mortgage | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,939	1,586
Current | Real estate loans: | One-to-four family residential mortgage | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,990	1,466
Current | Real estate loans: | Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	62,018	73,357
Current | Real estate loans: | Construction and land | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	62,018	73,357
Current | Real estate loans: | Construction and land | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	0
Current | Real estate loans: | Multifamily | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,493,796	2,509,888
Current | Real estate loans: | Multifamily | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,480,376	2,496,273
Current | Real estate loans: | Multifamily | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	442	458
Current | Real estate loans: | Multifamily | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	12,978	13,157
Current | Real estate loans: | Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	99,385	92,626
Current | Real estate loans: | Home equity and lines of credit | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	98,942	92,305
Current | Real estate loans: | Home equity and lines of credit | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	304	111
Current | Real estate loans: | Home equity and lines of credit | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	139	210
Current | Commercial and industrial loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	208,892	190,248
Current | Commercial and industrial loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	206,173	188,639
Current | Commercial and industrial loans | Special Mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	898	352
Current | Commercial and industrial loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	1,821	1,257
Current | Other loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,167	3,015
Current | Other loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	2,167	3,012
Current | Other loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans held-for-investment, net	$ 0	$ 3

Loans - Non-Accrual Loans, Excl

Loans - Non-Accrual Loans, Excluding PCD Loans (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded Investment	$ 8,124	$ 8,124	$ 8,500
Unpaid Principal Balance	9,127	9,127
With No Related Allowance	4,365	4,365
Interest Income	46	95
Real estate loans: | Commercial mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded Investment	5,028	5,028
Unpaid Principal Balance	5,537	5,537
With No Related Allowance	3,257	3,257
Interest Income	25	50
Real estate loans: | One-to-Four Family
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded Investment	320	320
Unpaid Principal Balance	352	352
With No Related Allowance	0	0
Interest Income	0	6
Real estate loans: | Construction and land
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded Investment	1,107	1,107
Unpaid Principal Balance	1,107	1,107
With No Related Allowance	1,107	1,107
Interest Income	0	0
Real estate loans: | Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded Investment	1,131	1,131
Unpaid Principal Balance	1,140	1,140
With No Related Allowance	0	0
Interest Income	19	33
Real estate loans: | Home equity and lines of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded Investment	128	128
Unpaid Principal Balance	377	377
With No Related Allowance	0	0
Interest Income	0	2
Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded Investment	407	407
Unpaid Principal Balance	611	611
With No Related Allowance	1	1
Interest Income	2	4
Other loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded Investment	3	3
Unpaid Principal Balance	3	3
With No Related Allowance	0	0
Interest Income	$ 0	$ 0

Loans - Summary of Impaired Loa

Loans - Summary of Impaired Loans (Details) $ in Thousands	Dec. 31, 2020USD ($)
Recorded Investment
With No Allowance Recorded	$ 7,800
Total	13,242
Unpaid Principal Balance
Total	15,512
Related Allowance	(73)
Real estate loans:
Recorded Investment
With No Allowance Recorded	11,382
With a Related Allowance Recorded	1,844
Unpaid Principal Balance
With No Allowance Recorded	13,220
With a Related Allowance Recorded	2,276
Related Allowance	(69)
Real estate loans: | Commercial mortgage
Recorded Investment
With No Allowance Recorded	8,838
With a Related Allowance Recorded	1,812
Total	10,650
Unpaid Principal Balance
With No Allowance Recorded	10,076
With a Related Allowance Recorded	2,244
Total	12,320
Related Allowance	(66)
Real estate loans: | One-to-four family residential mortgage
Recorded Investment
With No Allowance Recorded	1,903
Total	1,903
Unpaid Principal Balance
With No Allowance Recorded	2,032
Total	2,032
Related Allowance	0
Real estate loans: | Multifamily
Recorded Investment
With No Allowance Recorded	626
Total	626
Unpaid Principal Balance
With No Allowance Recorded	1,097
Total	1,097
Related Allowance	0
Real estate loans: | Home equity and lines of credit
Recorded Investment
With No Allowance Recorded	15
With a Related Allowance Recorded	32
Total	47
Unpaid Principal Balance
With No Allowance Recorded	15
With a Related Allowance Recorded	32
Total	47
Related Allowance	(3)
Commercial and industrial loans
Recorded Investment
With a Related Allowance Recorded	16
Total	16
Unpaid Principal Balance
With a Related Allowance Recorded	16
Total	16
Related Allowance	$ (4)

Loans - Average Recorded Invest

Loans - Average Recorded Investment and Interest Recognized on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Average Recorded Investment
Total	$ 20,202	$ 20,451
Interest Income
Total	277	436
Real estate loans: | Commercial mortgage
Average Recorded Investment
With No Allowance Recorded	14,522	15,020
With a Related Allowance Recorded	2,335	1,992
Total	16,857	17,012
Interest Income
With No Allowance Recorded	191	286
With a Related Allowance Recorded	41	57
Total	232	343
Real estate loans: | One-to-four family residential mortgage
Average Recorded Investment
With No Allowance Recorded	2,122	2,241
With a Related Allowance Recorded	261	174
Total	2,383	2,415
Interest Income
With No Allowance Recorded	22	51
With a Related Allowance Recorded	5	10
Total	27	61
Real estate loans: | Multifamily
Average Recorded Investment
With No Allowance Recorded	854	915
Total	854	915
Interest Income
With No Allowance Recorded	18	31
Total	18	31
Real estate loans: | Home equity and lines of credit
Average Recorded Investment
With No Allowance Recorded	20	20
With a Related Allowance Recorded	33	33
Total	53	53
Interest Income
With No Allowance Recorded	0	0
With a Related Allowance Recorded	0	1
Total	0	1
Commercial and industrial loans
Average Recorded Investment
With No Allowance Recorded	37	38
With a Related Allowance Recorded	18	18
Total	55	56
Interest Income
With No Allowance Recorded	0	0
With a Related Allowance Recorded	0	0
Total	$ 0	$ 0

Loans - Narrative, Collateral-D

Loans - Narrative, Collateral-Dependent Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-dependent impaired loans	$ 9,800	$ 10,200
Real estate loans: | Commercial mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-dependent impaired loans	7,700
Real estate loans: | Construction and land
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-dependent impaired loans	1,100
Real estate loans: | Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-dependent impaired loans	619
Real estate loans: | One-to-Four Family
Financing Receivable, Allowance for Credit Loss [Line Items]
Collateral-dependent impaired loans	$ 380

Loans - Narrative, Troubled Deb

Loans - Narrative, Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)loan	Jun. 30, 2020borrowercontract	Jun. 30, 2021USD ($)loancontract	Jun. 30, 2020USD ($)borrowerloancontract	Dec. 31, 2020USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of relationships (contract) | loan	0		0	3
Pre-Modification Outstanding Recorded Investment				$ 731
Post-Modification Outstanding Recorded Investment(1)				$ 731
Number of borrowers | borrower		3		3
Net loans held-for-investment	$ 3,777,780		$ 3,777,780		$ 3,785,631
Troubled debt restructurings	11,500		$ 11,500		$ 12,100
Number of TDR loans restructured that subsequently defaulted (contract) | contract			0	0
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of relationships (contract) | loan				1
Pre-Modification Outstanding Recorded Investment				$ 187
Post-Modification Outstanding Recorded Investment(1)				$ 187
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of relationships (contract) | loan				2
Pre-Modification Outstanding Recorded Investment				$ 544
Post-Modification Outstanding Recorded Investment(1)				$ 544
COVID-19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of relationships (contract) | contract		4
Loan modification program, extension for payment deferral period			90 days
Loan modification program, payment deferral period			90 days
Non-TDR loan restructuring modifications (contracts) | loan			21
Net loans held-for-investment	21,500		$ 21,500
Deferred interest payback period, maximum			18 months
COVID-19 | Principal deferral (interest only)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-TDR loan restructuring modifications (contracts) | loan			6
Net loans held-for-investment	2,100		$ 2,100
COVID-19 | Deferrable notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-TDR loan restructuring modifications (contracts) | loan			15
Net loans held-for-investment	$ 19,400		$ 19,400

Allowance for Credit Losses o_3

Allowance for Credit Losses on Loans (“ACL”) - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	$ 37,607	$ 39,493	$ 43,197	$ 38,520	$ 36,800	$ 28,707
Financing receivable, accrued interest receivable		12,600
Individually evaluated for impairment threshold		500
Individually evaluated for impairment	73	$ 68
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	10,353
PCD loan related reserves	$ 6,800

Allowance for Credit Losses o_4

Allowance for Credit Losses on Loans (“ACL”) - Allowance for Credit Losses for Off-Balance Sheet Credit (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	$ 1,702	$ 808
Provision for credit losses	106	263
Ending balance	1,808	1,808
Cumulative Effect, Period of Adoption, Adjustment
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	0	737
Cumulative Effect, Period of Adoption, Adjusted Balance
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance	$ 1,702	$ 1,545

Allowance for Credit Losses o_5

Allowance for Credit Losses on Loans (“ACL”) - Amount of Loans Receivable Held-for-Investment and Related Allowances Per Loan Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 43,197	$ 36,800	$ 37,607	$ 28,707
Charge-offs	(12)	(221)	(2,444)	(691)
Recoveries	9	20	52	400
Provisions (credit)	(3,701)	1,921	(6,075)	10,104
Ending balance	39,493	38,520	39,493	38,520
Originated Loans Net
Ending balance: individually evaluated for impairment	68		68		$ 73
Ending balance: collectively evaluated for impairment	39,425		39,425		37,534
Loans held-for-investment, net	3,817,273		3,817,273		3,823,238
Ending balance: individually evaluated for impairment	12,490		12,490		13,242
Ending balance: collectively evaluated for impairment	3,672,075		3,672,075		3,683,461
PPP loans not evaluated for impairment	132,708		132,708		126,535
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			10,353
Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			47,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	37,915	36,011	36,726	27,918
Charge-offs	(12)	(221)	(33)	(691)
Recoveries	9	20	52	400
Provisions (credit)	(3,239)	1,921	(5,613)	10,104
Ending balance	34,673	37,731	34,673	37,731
Originated Loans Net
Ending balance: individually evaluated for impairment	68		68		73
Ending balance: collectively evaluated for impairment	34,605		34,605		36,653
Loans held-for-investment, net	3,800,581		3,800,581		3,804,720
Ending balance: individually evaluated for impairment	12,490		12,490		13,242
Ending balance: collectively evaluated for impairment	3,655,383		3,655,383		3,664,943
PPP loans not evaluated for impairment	132,708		132,708		126,535
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans:
Originated Loans Net
Loans held-for-investment, net	3,588,831		3,588,831		3,610,210
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial and industrial loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,940	2,035	1,842	1,640
Charge-offs	(12)	(57)	(12)	(94)
Recoveries	7	3	28	9
Provisions (credit)	(341)	(135)	(211)	291
Ending balance	2,594	1,846	2,594	1,846
Originated Loans Net
Ending balance: individually evaluated for impairment	1		1		4
Ending balance: collectively evaluated for impairment	2,593		2,593		1,838
Loans held-for-investment, net	209,580		209,580		191,481
Ending balance: individually evaluated for impairment	14		14		16
Ending balance: collectively evaluated for impairment	76,858		76,858		64,930
PPP loans not evaluated for impairment	132,708		132,708		126,535
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Other loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	9	86	198	151
Charge-offs	0	0	0	0
Recoveries	0	2	2	0
Provisions (credit)	(2)	88	(5)	25
Ending balance	7	176	7	176
Originated Loans Net
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	7		7		198
Loans held-for-investment, net	2,170		2,170		3,029
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	2,170		2,170		3,029
PPP loans not evaluated for impairment	0		0		0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			3,541
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Commercial and industrial loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			947
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Other loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			(188)
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			40,267
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial and industrial loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			2,789
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Other loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			10
PCD/PCI loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,282	789	881
Charge-offs	0		(2,411)	0
Recoveries	0		0	0
Provisions (credit)	(462)		(462)	0
Ending balance	4,820	789	4,820	789
Originated Loans Net
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	4,820		4,820		881
Loans held-for-investment, net	16,692		16,692		18,518
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	16,692		16,692		18,518
PPP loans not evaluated for impairment	0		0		0
PCD/PCI loans | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			6,812
PCD/PCI loans | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			7,693
Commercial and multifamily | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	28,882		33,005
Charge-offs	0		0
Recoveries	0		19
Provisions (credit)	(2,342)		(4,535)
Ending balance	26,540		26,540
Originated Loans Net
Ending balance: individually evaluated for impairment	61		61
Ending balance: collectively evaluated for impairment	26,479		26,479
Loans held-for-investment, net	3,231,916		3,231,916
Ending balance: individually evaluated for impairment	9,716		9,716
Ending balance: collectively evaluated for impairment	3,222,200		3,222,200
PPP loans not evaluated for impairment	0		0
Commercial and multifamily | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			(1,949)
Commercial and multifamily | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			31,056
Commercial mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		5,444		4,891
Charge-offs		(164)		(597)
Recoveries		13		388
Provisions (credit)		1,406		2,017
Ending balance		6,699		6,699
Originated Loans Net
Ending balance: individually evaluated for impairment					66
Ending balance: collectively evaluated for impairment					5,944
Loans held-for-investment, net	735,303		735,303		717,566
Ending balance: individually evaluated for impairment					10,650
Ending balance: collectively evaluated for impairment					706,916
PPP loans not evaluated for impairment					0
Multifamily | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		26,889		20,203
Charge-offs		0		0
Recoveries		0		0
Provisions (credit)		354		7,040
Ending balance		27,243		27,243
Originated Loans Net
Ending balance: individually evaluated for impairment					0
Ending balance: collectively evaluated for impairment					26,995
Loans held-for-investment, net	2,496,613		2,496,613		2,512,934
Ending balance: individually evaluated for impairment					626
Ending balance: collectively evaluated for impairment					2,512,308
PPP loans not evaluated for impairment					0
One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,172	312	207	180
Charge-offs	0	0	(21)	0
Recoveries	1	2	2	2
Provisions (credit)	(563)	(42)	(811)	90
Ending balance	4,610	272	4,610	272
Originated Loans Net
Ending balance: individually evaluated for impairment	4		4		0
Ending balance: collectively evaluated for impairment	4,606		4,606		207
Loans held-for-investment, net	193,976		193,976		212,222
Ending balance: individually evaluated for impairment	1,610		1,610		1,903
Ending balance: collectively evaluated for impairment	192,366		192,366		210,319
PPP loans not evaluated for impairment	0		0		0
One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			5,233
One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			5,440
Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	269	671	1,214	536
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credit)	(10)	266	(34)	401
Ending balance	259	937	259	937
Originated Loans Net
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	259		259		1,214
Loans held-for-investment, net	63,125		63,125		74,351
Ending balance: individually evaluated for impairment	1,107		1,107		0
Ending balance: collectively evaluated for impairment	62,018		62,018		74,351
PPP loans not evaluated for impairment	0		0		0
Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			(921)
Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			293
Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	643	574	260	317
Charge-offs	0	0	0	0
Recoveries	1	0	1	1
Provisions (credit)	19	(16)	(17)	240
Ending balance	663	$ 558	663	$ 558
Originated Loans Net
Ending balance: individually evaluated for impairment	2		2		3
Ending balance: collectively evaluated for impairment	661		661		257
Loans held-for-investment, net	99,814		99,814		93,137
Ending balance: individually evaluated for impairment	43		43		47
Ending balance: collectively evaluated for impairment	99,771		99,771		93,090
PPP loans not evaluated for impairment	$ 0		0		$ 0
Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjustment | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			419
Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Cumulative Effect, Period of Adoption, Adjusted Balance | Real estate loans:
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			$ 679

Deposits - Deposit Account Bala

Deposits - Deposit Account Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Deposits [Abstract]
Non-interest-bearing checking	$ 826,823	$ 695,831
NOW and interest-bearing checking	979,788	905,208
Savings and money market	1,788,545	1,953,885
Certificates of deposit	513,113	521,627
Total deposits	$ 4,108,269	$ 4,076,551

Deposits - Interest Expense On

Deposits - Interest Expense On Deposits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Deposits [Abstract]
NOW and interest-bearing checking, savings, and money market	$ 845	$ 2,894	$ 1,777	$ 6,967
Certificates of deposit	826	4,579	1,764	9,785
Total interest expense on deposit accounts	$ 1,671	$ 7,473	$ 3,541	$ 16,752

Equity Incentive Plans - Stock

Equity Incentive Plans - Stock Options Outstanding (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2021$ / sharesshares	Dec. 31, 2020$ / sharesshares
Number of Stock Options
Beginning Balance (shares) | shares	2,214,193
Forfeited (shares) | shares	(41,090)
Exercised (shares) | shares	(138,605)
Ending Balance (shares) | shares	2,034,498	2,214,193
Exercisable (shares) | shares	2,017,419
Weighted Average Grant Date Fair Value
Beginning Balance (usd per share)	$ 4.01
Forfeited (usd per share)	3.96
Exercised (usd per share)	3.92
Ending Balance (usd per share)	4.01	$ 4.01
Exercisable (usd per share)	4.01
Weighted Average Exercise Price
Beginning Balance (usd per share)	13.94
Forfeited (usd per share)	13.62
Exercised (usd per share)	13.78
Ending Balance (usd per share)	13.96	$ 13.94
Exercisable (usd per share)	$ 13.94
Weighted Average Contractual Life (years)
Outstanding	3 years 5 months 23 days	3 years 11 months 15 days
Exercisable	3 years 5 months 19 days

Equity Incentive Plans - Narrat

Equity Incentive Plans - Narrative (Details) - USD ($)	Jan. 29, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (shares)				176,930
Allocated share-based compensation expense		$ 261,000	$ 432,000	$ 504,000	$ 880,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected future stock-based compensation expense		15,000		$ 15,000
Average period of expected future stock option expense				4 months 24 days
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected future stock-based compensation expense		$ 2,300,000		$ 2,300,000
Average period of expected future stock option expense				3 years 7 months 6 days
Two Thousand Nineteen Equity Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (shares)	147,315
Grant date value	$ 1,800,000
Two Thousand Nineteen Equity Incentive Plan | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (shares)	29,615
Grant date value	$ 366,041
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 (shares)	32,769
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 (shares)	114,546
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)	6 Months Ended
	Jun. 30, 2021$ / sharesshares
Number of Shares Awarded
Beginning Balance (shares) | shares	104,010
Granted (shares) | shares	176,930
Vested (shares) | shares	(38,470)
Forfeited (shares) | shares	(5,585)
Ending Balance (shares) | shares	236,885
Weighted Average Grant Date Fair Value
Beginning Balance (in dollars per share) | $ / shares	$ 15.91
Granted (in dollars per share) | $ / shares	12.59
Vested (in dollars per share) | $ / shares	15.81
Forfeited (in dollars per share) | $ / shares	15.28
Ending Balance (in dollars per share) | $ / shares	$ 13.46

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	$ 1,097,423	$ 1,264,805
Trading securities	12,743	12,291
Individually evaluated loans	4,705	5,325
Measured on a recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	1,097,423	1,264,805
Trading securities	12,743	12,291
Equity securities	219	253
Total	1,110,385	1,277,349
Measured on a recurring basis | U.S. Government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	2,754	3,158
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	970,145	1,172,312
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	229,767	281,343
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	740,378	890,965
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		4
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	78	123
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	124,446	88,418
Measured on a recurring basis | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale		794
Measured on a recurring basis | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	124,524	89,335
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	12,743	12,291
Equity securities	219	253
Total	12,962	12,544
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Government agency 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) | 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
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) | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale		0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other debt 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 Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	1,097,423	1,264,805
Trading securities	0	0
Equity securities	0	0
Total	1,097,423	1,264,805
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | U.S. Government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	2,754	3,158
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	970,145	1,172,312
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	229,767	281,343
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	740,378	890,965
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		4
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	78	123
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	124,446	88,418
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale		794
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale	124,524	89,335
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) | U.S. Government agency 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) | 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
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) | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available-for-sale		0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Other debt securities
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	4,805	5,325
Measured on a non-recurring basis | Real estate loans:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	4,691	5,312
Measured on a non-recurring basis | Real estate loans: | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	3,799	5,268
Measured on a non-recurring basis | Real estate loans: | One-to-Four Family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	854
Measured on a non-recurring basis | Real estate loans: | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	9	16
Measured on a non-recurring basis | Real estate loans: | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	29	28
Measured on a non-recurring basis | Commercial and industrial loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	14	13
Measured on a non-recurring basis | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	100
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 loans:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate loans: | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate loans: | One-to-Four Family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate loans: | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate loans: | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial and industrial loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	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 loans:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Real estate loans: | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Real estate loans: | One-to-Four Family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Real estate loans: | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Real estate loans: | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Commercial and industrial loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	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	4,805	5,325
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real estate loans:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	4,691	5,312
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real estate loans: | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	3,799	5,268
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real estate loans: | One-to-Four Family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	854
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real estate loans: | Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	9	16
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real estate loans: | Home equity and lines of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	29	28
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Commercial and industrial loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	14	$ 13
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	$ 100

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	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually evaluated loans	$ 4,705	$ 5,325
Other real estate owned	$ 100	$ 0
Appraisals | Discount for costs to sell
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	0.070	0.070
Other real estate owned inputs	0.070
Appraisals | Discount for quick sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	0.100	0.100
Discounted cash flows | Interest rates | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	0.0488	0.0488
Discounted cash flows | Interest rates | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable	0.0625	0.0625

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Impaired loans held-for-investment and held-for-sale with outstanding principal balances	$ 6,800		$ 7,400
Estimated fair value of impaired loans held-for-investment and held-for-sale	4,700		$ 5,300
Increase (decrease) in net impairment charges	5	$ 177
Net recoveries (charge offs)	2,400	291
Assets acquired through foreclosure	$ 100	$ 0

Fair Value Measurements - Estim

Fair Value Measurements - Estimated Fair Values of the Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financial assets:
Trading securities	$ 12,743	$ 12,291
Debt securities available-for-sale	1,097,423	1,264,805
Debt securities held-to-maturity	6,703	7,574
Loans held-for-sale		19,895
Carrying Value
Financial assets:
Cash and cash equivalents	193,184	87,544
Trading securities	12,743	12,291
Debt securities available-for-sale	1,097,423	1,264,805
Debt securities held-to-maturity	6,417	7,234
Equity securities	219	253
FHLBNY stock, at cost	24,508	28,641
Loans held-for-sale		19,895
Net loans held-for-investment	3,777,780	3,785,631
Derivative assets	788	1,498
Financial liabilities:
Deposits	4,108,269	4,076,551
Borrowed funds	470,329	591,789
Advance payments by borrowers for taxes and insurance	24,203	19,677
Derivative liabilities	790	1,502
Estimated Fair Value
Financial assets:
Cash and cash equivalents	193,184	87,544
Trading securities	12,743	12,291
Debt securities available-for-sale	1,097,423	1,264,805
Debt securities held-to-maturity	6,703	7,574
Equity securities	219	253
FHLBNY stock, at cost	24,508	28,641
Net loans held-for-investment	3,894,985	3,842,054
Derivative assets	788	1,498
Financial liabilities:
Deposits	4,112,519	4,082,538
Borrowed funds	481,011	609,900
Advance payments by borrowers for taxes and insurance	24,203	19,677
Derivative liabilities	790	1,502
Estimated Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	193,184	87,544
Trading securities	12,743	12,291
Debt securities available-for-sale	0	0
Debt securities held-to-maturity	0	0
Equity securities	219	253
FHLBNY stock, at cost	0	0
Loans held-for-sale		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	1,097,423	1,264,805
Debt securities held-to-maturity	6,703	7,574
Equity securities	0	0
FHLBNY stock, at cost	24,508	28,641
Loans held-for-sale		0
Net loans held-for-investment	0	0
Derivative assets	788	1,498
Financial liabilities:
Deposits	4,112,519	4,082,538
Borrowed funds	481,011	609,900
Advance payments by borrowers for taxes and insurance	24,203	19,677
Derivative liabilities	790	1,502
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	0
FHLBNY stock, at cost	0	0
Loans held-for-sale		19,895
Net loans held-for-investment	3,894,985	3,842,054
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		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 19,794	$ 10,793	$ 38,471	$ 15,344
Weighted average shares outstanding-basic (shares)	48,907,585	46,837,473	49,216,157	46,814,647
Effect of non-vested restricted stock and stock options outstanding (shares)	400,076	34,017	252,651	112,857
Weighted average shares outstanding-diluted (shares)	49,307,661	46,871,490	49,468,808	46,927,504
Earnings per share-basic (usd per share)	$ 0.40	$ 0.23	$ 0.78	$ 0.33
Earnings per share-diluted (usd per share)	$ 0.40	$ 0.23	$ 0.78	$ 0.33
Anti-dilutive shares (shares)	125,744	2,316,695	564,061	1,659,262

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 34,574	$ 36,741
Operating lease liabilities	$ 40,721	$ 42,734
Minimum
Lessee, Lease, Description [Line Items]
Renewal term	5 years
Maximum
Lessee, Lease, Description [Line Items]
Term of lease	34 years
Renewal term	10 years

Leases - Supplemental Lease Inf

Leases - Supplemental Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Operating lease cost	$ 1,453	$ 1,423	$ 2,908	$ 2,862
Variable lease cost	1,010	956	2,245	1,500
Net lease cost	2,463	2,379	5,153	4,362
Cash paid for amounts included in measurement of operating lease liabilities	1,691	1,524	3,399	3,069
Right-of-use assets obtained in exchange for new lease liabilities	$ 0	$ 0	$ 0	$ 3,028
Weighted average remaining lease term	12 years 2 months 26 days	12 years 7 months 17 days	12 years 2 months 26 days	12 years 7 months 17 days
Weighted average discount rate	3.61%	3.59%	3.61%	3.59%

Leases - Lease Payments Obligat

Leases - Lease Payments Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Leases [Abstract]
2021	$ 2,937
2022	5,550
2023	5,504
2024	5,067
2025	4,710
Thereafter	28,196
Total lease payments	51,964
Less: imputed interest	11,243
Present value of lease liabilities	$ 40,721	$ 42,734

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Total fees and service charges for customer services	$ 1,327	$ 666	$ 2,524	$ 1,786
Income on bank-owned life insurance	857	865	1,705	1,741
Gains on available-for-sale debt securities, net	509	73	606	60
Gains (losses) on trading securities, net	807	1,626	1,171	(366)
Gains on sales of loans	1,401	665	1,401	665
Swap income	0	308	0	384
Other	15	35	145	76
Total non-interest income	4,916	4,238	7,552	4,346
Service charges
Disaggregation of Revenue [Line Items]
Total fees and service charges for customer services	690	356	1,410	1,109
ATM and card interchange fees
Disaggregation of Revenue [Line Items]
Total fees and service charges for customer services	483	275	882	579
Investment fees
Disaggregation of Revenue [Line Items]
Total fees and service charges for customer services	$ 154	$ 35	$ 232	$ 98

Derivatives - Additional Inform

Derivatives - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)instrument	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)instrument	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)instrument
Derivative [Line Items]
Swap income	$ 0	$ 308	$ 0	$ 384
Interest Rate Swap
Derivative [Line Items]
Number of derivative instruments held | instrument	7		7		7
Derivative, notional amount	$ 38,700		$ 38,700		$ 39,200

Derivatives - Fair Value of Der

Derivatives - Fair Value of Derivatives (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Other assets
Derivative [Line Items]
Fair value of derivative asset	$ 788	$ 1,498
Other liabilities
Derivative [Line Items]
Fair value of derivative liability	$ 790	$ 1,502

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements Adopted (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	$ 37,607	$ 39,493	$ 43,197	$ 38,520	$ 36,800	$ 28,707
Unfounded credit commitment	808	$ 1,808	1,702
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase in allowance for credit losses	11,100
Allowance for credit loss	10,353
Unfounded credit commitment	737		$ 0
PCD loan related reserves	6,800
Non-PCD loan related reserves	$ 4,300