FS Bancorp (FSBW) 10-Q10 May 212021 Q1 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2021	Apr. 30, 2021
Document And Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2021
Entity File Number	001-35589
Entity Registrant Name	FS BANCORP, INC.
Entity Incorporation, State or Country Code	WA
Entity Tax Identification Number	45-4585178
Entity Address, Address Line One	6920 220th Street SW
Entity Address, City or Town	Mountlake Terrace
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98043
City Area Code	425
Local Phone Number	771-5299
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	FSBW
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		4,227,174
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001530249
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 10,982	$ 11,554
Interest-bearing deposits at other financial institutions	74,464	80,022
Total cash and cash equivalents	85,446	91,576
Certificates of deposit at other financial institutions	12,278	12,278
Securities available-for-sale, at fair value	201,311	178,018
Securities held-to-maturity (fair value of $7,873 and, $7,556, respectively)	7,500	7,500
Loans held for sale, at fair value	156,281	166,448
Loans receivable, net	1,593,060	1,544,981
Accrued interest receivable	7,429	7,030
Premises and equipment, net	26,798	27,343
Operating lease right-of-use ("ROU") assets	5,085	4,949
Federal Home Loan Bank ("FHLB") stock, at cost	6,475	7,439
Other real estate owned ("OREO")		90
Deferred tax asset, net	164
Bank owned life insurance ("BOLI"), net	36,440	36,226
Servicing rights, held at cost	15,735	12,595
Goodwill	2,312	2,312
Core deposit intangible, net	4,574	4,751
Other assets	14,698	9,705
TOTAL ASSETS	2,175,586	2,113,241
LIABILITIES
Noninterest-bearing accounts	414,390	362,853
Interest-bearing accounts	1,366,403	1,311,218
Total deposits	1,780,793	1,674,071
Borrowings	72,528	165,809
Principal amount	50,000	10,000
Unamortized debt issuance costs	(656)
Total subordinated note less unamortized debt issuance costs	49,344	10,000
Operating lease liabilities	5,285	5,176
Deferred tax liability, net		58
Other liabilities	27,325	28,120
Total liabilities	1,935,275	1,883,234
COMMITMENTS AND CONTINGENCIES (NOTE 9)
STOCKHOLDERS' EQUITY
Preferred stock, $.01 par value; 5,000,000 shares authorized; none issued or outstanding
Common stock, $.01 par value; 45,000,000 shares authorized; 4,233,040 and 4,237,956 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	42	42
Additional paid-in capital	81,580	81,318
Retained earnings	157,193	146,405
Accumulated other comprehensive income, net of tax	1,721	2,533
Unearned shares - Employee Stock Ownership Plan ("ESOP")	(225)	(291)
Total stockholders' equity	240,311	230,007
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 2,175,586	$ 2,113,241

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Items included in Consolidated Balance Sheets
Securities held-to-maturity, at fair value	$ 7,873	$ 7,556
Preferred stock par value, in dollars per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock par value, in dollars per share	$ 0.01	$ 0.01
Common stock, shares authorized	45,000,000	45,000,000
Common stock, shares issued	4,233,040	4,237,956
Common stock, shares outstanding	4,233,040	4,237,956

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
INTEREST INCOME
Loans receivable, including fees	$ 21,534	$ 20,740
Interest and dividends on investment securities, cash and cash equivalents, and certificates of deposit at other financial institutions	1,250	1,209
Total interest and dividend income	22,784	21,949
INTEREST EXPENSE
Deposits	1,982	3,807
Borrowings	446	497
Subordinated notes	256	172
Total interest expense	2,684	4,476
NET INTEREST INCOME	20,100	17,473
PROVISION FOR LOAN LOSSES	1,500	3,686
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	18,600	13,787
NONINTEREST INCOME
Service charges and fee income	765	924
Gain on sale of loans	11,685	5,899
Earnings on cash surrender value of BOLI	214	216
Other noninterest income	370	1,852
Total noninterest income	13,034	8,891
NONINTEREST EXPENSE
Salaries and benefits	11,609	9,547
Operations	2,467	2,403
Occupancy	1,139	1,109
Data processing	1,307	980
Loss on sale of OREO	9	2
Loan costs	524	500
Professional and board fees	822	681
Federal Deposit Insurance Corporation ("FDIC") insurance	248	126
Marketing and advertising	97	146
Amortization of core deposit intangible	177	176
(Recovery) impairment of servicing rights	(2,050)	514
Total noninterest expense	16,349	16,184
INCOME BEFORE PROVISION FOR INCOME TAXES	15,285	6,494
PROVISION FOR INCOME TAXES	3,402	1,327
NET INCOME	$ 11,883	$ 5,167
Basic earnings per share(in dollars per share)	$ 2.78	$ 1.16
Diluted earnings per share(in dollars per share)	$ 2.70	$ 1.14

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 11,883	$ 5,167
Securities available-for-sale:
Unrealized holding (loss) gain during period	(2,186)	2,364
Income tax benefit (provision) related to unrealized holding (loss) gain	472	(508)
Cash flow hedges:
Unrealized derivative gains (losses) during period	1,036	(1,052)
Income tax (provision) benefit related to unrealized derivative gains (losses)	(223)	226
Reclassification adjustment for interest expense, net included in net income	114	1
Income tax provision related to reclassification for expense, net	(25)
Other comprehensive (loss) income, net of tax	(812)	1,031
COMPREHENSIVE INCOME	$ 11,071	$ 6,198

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common StockRepurchase plan	Common Stock	Additional Paid-in CapitalRepurchase plan	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income, Net of Tax	Unearned ESOP Shares	Repurchase plan	Total
Balance at Dec. 31, 2019		$ 44		$ 89,268	$ 110,715	$ 788	$ (573)		$ 200,242
Balance (in shares) at Dec. 31, 2019		4,459,041
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income					5,167				5,167
Dividends paid					(925)				(925)
Share-based compensation				224					224
Common stock repurchased	$ (1)		$ (4,988)					$ (4,989)
Common stock repurchased (in shares)	(136,243)
Stock options exercised, net				(246)					(246)
Stock options exercised, net (in shares)		9,398
Other comprehensive income, net of tax						1,031			1,031
ESOP shares allocated				259			66		325
Balance at Mar. 31, 2020		$ 43		84,517	114,957	1,819	(507)		200,829
Balance (in shares) at Mar. 31, 2020		4,332,196
Balance at Dec. 31, 2020		$ 42		81,318	146,405	2,533	(291)		230,007
Balance (in shares) at Dec. 31, 2020		4,237,956
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income					11,883				11,883
Dividends paid					(1,095)				(1,095)
Share-based compensation				295					295
Common stock repurchased			$ (273)					$ (273)
Common stock repurchased (in shares)	(7,416)
Stock options exercised, net				(96)					(96)
Stock options exercised, net (in shares)		2,500
Other comprehensive income, net of tax						(812)			(812)
ESOP shares allocated				336			66		402
Balance at Mar. 31, 2021		$ 42		$ 81,580	$ 157,193	$ 1,721	$ (225)		$ 240,311
Balance (in shares) at Mar. 31, 2021		4,233,040

Consolidated Statement of Chang

Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Dividends paid (in dollars per share)	$ 0.26	$ 0.21

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($)	3 Months Ended
Consolidated Statement of Cash Flows - USD ($)	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS (USED BY) FROM OPERATING ACTIVITIES
Net income	$ 11,883,000	$ 5,167,000
Adjustments to reconcile net income to net cash from (used by) operating activities
Provision for loan losses	1,500,000	3,686,000
Depreciation, amortization and accretion	5,165,000	2,178,000
Compensation expense related to stock options and restricted stock awards	295,000	224,000
ESOP compensation expense for allocated shares	402,000	325,000
Increase in cash surrender value of BOLI	(214,000)	(216,000)
Gain on sale of loans held for sale	(11,685,000)	(5,899,000)
Origination of loans held for sale	(409,209,000)	(259,191,000)
Proceeds from sale of loans held for sale	423,983,000	218,574,000
(Recovery) impairment of servicing rights	(2,050,000)	514,000
Loss on sale of OREO	9,000	2,000
Changes in operating assets and liabilities
Accrued interest receivable	(399,000)	(418,000)
Other assets	(2,547,000)	5,058,000
Other liabilities	1,066,000	14,000
Net cash from (used by) operating activities	18,199,000	(29,982,000)
Activity in securities available-for-sale:
Maturities, prepayments, and calls	6,919,000	12,002,000
Purchases	(32,729,000)	(40,236,000)
Maturities of certificates of deposit at other financial institutions	0	2,976,000
Loan originations and principal collections, net	(50,704,000)	(27,573,000)
Purchase of portfolio loans	0	(32,743,000)
Proceeds from sale of OREO, net	81,000	76,000
Purchase of premises and equipment, net	(128,000)	(583,000)
Change in FHLB stock, net	964,000	(2,876,000)
Net cash used by investing activities	(75,597,000)	(88,957,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	106,680,000	53,992,000
Proceeds from borrowings	0	203,750,000
Repayments of borrowings	(93,281,000)	(129,500,000)
Net proceeds from issuance of subordinated notes	49,333,000	0
Repayment of subordinated notes	(10,000,000)	0
Dividends paid on common stock	(1,095,000)	(925,000)
Disbursements from stock options exercised, net	(96,000)	(246,000)
Common stock repurchased	(273,000)	(4,989,000)
Net cash from financing activities	51,268,000	122,082,000
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(6,130,000)	3,143,000
CASH AND CASH EQUIVALENTS, beginning of period	91,576,000	45,778,000
CASH AND CASH EQUIVALENTS, end of period	85,446,000	48,921,000
Cash paid during the period for:
Interest on deposits and borrowings	2,546,000	4,285,000
Income taxes	0	0
SUPPLEMENTARY DISCLOSURES OF NONCASH OPERATING, INVESTING AND FINANCING ACTIVITIES
Change in unrealized (loss) gain on investment securities, net	(2,186,000)	2,364,000
Change in unrealized gain (loss) on cash flow hedges, net	1,150,000	(1,051,000)
Retention in gross mortgage servicing rights from loan sales	3,144,000	1,185,000
Right-of-use assets in exchange for lease liabilities	$ 422,000	$ 0

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2021
Basis of Presentation and Summary of Significant Accounting Policies
Basis of Presentation and Summary of Significant Accounting Policies	NOTE 1 - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations - a Financial Statement Presentation - The results for the three months ended March 31, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021, or any other future period. The preparation of financial statements, in conformity with U.S. GAAP, requires management to make estimates and assumptions that affect amounts reported in the financial statements. Actual results could differ from these estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan and lease losses, fair value of financial instruments, the valuation of servicing rights, deferred income taxes, and if needed, a deferred tax asset valuation allowance. Amounts presented in the consolidated financial statements and footnote tables are rounded and presented to the nearest thousands of dollars except per share amounts. If the amounts are above $1.0 million, they are rounded one decimal point, and if they are above $1.0 billion, they are rounded two decimal points. Principles of Consolidation - Segment Reporting - Subsequent Events - RECENT ACCOUNTING PRONOUNCEMENTS In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, as amended by ASU 2018-19, ASU 2019-10, and ASU 2019-11. financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the approach under CECL. Organizations will continue to use judgment to determine which loss estimation method is appropriate for their circumstances. The ASU requires enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. These disclosures include qualitative and quantitative requirements that provide additional information about the amounts recorded in the financial statements. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The ASU and associated amendments are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. Early adoption will be permitted for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company has selected a third-party vendor to assist in the implementation of this ASU and has run parallel computations as it continues to evaluate the impact of adoption of the new standard. As part of the implementation, management is also evaluating economic variables and forecast time horizons it believes to be most relevant based on the composition of the loan portfolio to develop a reasonable and supportable forecast, likely to include forecasted levels of employment, gross domestic product, and home price index, depending on the nature of the loan segment, as well as various loss methodologies to estimate expected credit losses. In addition, management has kept current on evolving interpretations and industry practices related to ASU 2016-13 via webcasts, publications, and conferences. Once adopted, the Company anticipates the allowance for loan losses to potentially change through a one-time adjustment to retained earnings, however, until the evaluation is complete the magnitude of the potential change will be unknown. In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326: Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments In May 2019, the FASB issued ASU 2019-05, Financial Instruments-Credit Losses (Topic 326): Targeted Transition Relief In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform” (“Topic 848”). This ASU provides optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this ASU apply to contract modifications that replace a reference rate affected by reference rate reform (including rates referenced in fallback provisions) and contemporaneous modifications of other contract terms related to the replacement of the reference rate (including contract modifications to add or change fallback provisions). The following optional expedients for applying the requirements of certain Topics or Industry Subtopics in the Codification are permitted for contracts that are modified because of reference rate reform and that meet certain scope guidance: 1) Modifications of contracts within the scope of Topics 310, Receivables, and 470, Debt, should be accounted for by prospectively adjusting the effective interest rate; 2) Modifications of contracts within the scope of Topics 840, Leases, and 842, Leases, should be accounted for as a continuation of the existing contracts with no reassessments of the lease classification and the discount rate (for example, the incremental borrowing rate) or remeasurements of lease payments that otherwise would be required under those Topics for modifications not accounted for as separate contracts; and 3) Modifications of contracts do not require an entity to reassess its original conclusion about whether that contract contains an embedded derivative that is clearly and closely related to the economic characteristics and risks of the host contract under Subtopic 815-15, Derivatives and Hedging— Embedded Derivatives. In January 2021, ASU 2021-01 updated amendments in the new ASU to clarify that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. Amendments in this ASU and the expedients and exceptions in Topic 848 capture the incremental consequences of the scope clarification and tailor the existing guidance to derivative instruments affected by the discounting transition. An entity may elect to apply the amendments in this ASU on a full retrospective basis as of any date from the effective dates. The amendments in this ASU have differing effective dates, beginning with an interim period including and subsequent to March 12, 2020 through December 31, 2022. The Company does not expect the adoption of ASU 2020-04 to have a material impact on its consolidated financial statements. Recent Events Application of New Accounting Guidance Adopted in 2021 In October 2020, the FASB issued ASU 2020-08, Codification Improvements to Subtopic 310-20: Receivables – Nonrefundable Fees and Other Costs In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes.

Investments

Investments	3 Months Ended
Investments	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Investments	NOTE 2 - INVESTMENTS The following tables present the amortized costs, unrealized gains, unrealized losses, and estimated fair values of securities available-for-sale and held-to-maturity at March 31, 2021 and December 31, 2020: March 31, 2021 Estimated Amortized Unrealized Unrealized Fair SECURITIES AVAILABLE-FOR-SALE Cost Gains Losses Values U.S. agency securities $ 7,936 $ 164 $ (272) $ 7,828 Corporate securities 11,896 51 (402) 11,545 Municipal bonds 96,594 1,960 (905) 97,649 Mortgage-backed securities 66,104 1,562 (265) 67,401 U.S. Small Business Administration securities 16,509 379 — 16,888 Total securities available-for-sale 199,039 4,116 (1,844) 201,311 SECURITIES HELD-TO-MATURITY Corporate securities 7,500 373 — 7,873 Total securities held-to-maturity 7,500 373 — 7,873 Total securities $ 206,539 $ 4,489 $ (1,844) $ 209,184 December 31, 2020 Estimated Amortized Unrealized Unrealized Fair SECURITIES AVAILABLE-FOR-SALE Cost Gains Losses Values U.S. agency securities $ 7,940 $ 166 $ (1) $ 8,105 Corporate securities 11,885 54 (939) 11,000 Municipal bonds 69,572 2,435 (150) 71,857 Mortgage-backed securities 65,722 2,541 (76) 68,187 U.S. Small Business Administration securities 18,441 443 (15) 18,869 Total securities available-for-sale 173,560 5,639 (1,181) 178,018 SECURITIES HELD-TO-MATURITY Corporate securities 7,500 77 (21) 7,556 Total securities held-to-maturity 7,500 77 (21) 7,556 Total securities $ 181,060 $ 5,716 $ (1,202) $ 185,574 At March 31, 2021, the Bank pledged seven securities held at the FHLB of Des Moines with a carrying value of $8.5 million to secure Washington State public deposits of $14.3 million with a $5.7 million collateral requirement by the Washington Public Deposit Protection Commission. At December 31, 2020, the Bank pledged seven securities held at the FHLB of Des Moines with a carrying value of $8.8 million to secure Washington State public deposits of $13.2 million with a $5.3 million minimum collateral requirement by the Washington Public Deposit Protection Commission. Investment securities that were in an unrealized loss position at March 31, 2021 and December 31, 2020 are presented in the following tables, based on the length of time individual securities have been in an unrealized loss position. Management believes that these securities are only temporarily impaired due to changes in market interest rates or the widening of market spreads subsequent to the initial purchase of the securities, and not due to concerns regarding the underlying credit of the issuers or the underlying collateral. March 31, 2021 Less than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized SECURITIES AVAILABLE-FOR-SALE Value Losses Value Losses Value Losses U.S. agency securities $ 3,691 $ (272) $ — $ — $ 3,691 $ (272) Corporate securities 6,596 (402) — — 6,596 (402) Municipal bonds 31,881 (905) — — 31,881 (905) Mortgage-backed securities 18,451 (256) 2,990 (9) 21,441 (265) Total securities available-for-sale $ 60,619 $ (1,835) $ 2,990 $ (9) $ 63,609 $ (1,844) December 31, 2020 Less than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized SECURITIES AVAILABLE-FOR-SALE Value Losses Value Losses Value Losses U.S. agency securities $ 1,986 $ (1) $ — $ — $ 1,986 $ (1) Corporate securities 7,059 (939) — — 7,059 (939) Municipal bonds 8,377 (150) — — 8,377 (150) Mortgage-backed securities 6,903 (65) 3,002 (11) 9,905 (76) U.S. Small Business Administration securities 2,314 (15) — — 2,314 (15) Total securities available-for-sale 26,639 (1,170) 3,002 (11) 29,641 (1,181) SECURITIES HELD-TO-MATURITY Corporate securities 4,979 (21) — — 4,979 (21) Total securities held-to-maturity 4,979 (21) — — 4,979 (21) Total $ 31,618 $ (1,191) $ 3,002 $ (11) $ 34,620 $ (1,202) The contractual maturities of securities available-for-sale and held-to-maturity at March 31, 2021 and December 31, 2020 are listed below. Expected maturities of mortgage-backed securities may differ from contractual maturities because borrowers may have the right to call or prepay the obligations; therefore, these securities are classified separately with no specific maturity date. March 31, 2021 December 31, 2020 SECURITIES AVAILABLE-FOR-SALE Amortized Fair Amortized Fair U.S. agency securities Cost Value Cost Value Due after one year through five years $ 973 $ 1,045 $ 978 $ 1,060 Due after five years through ten years 1,000 1,032 1,000 1,036 Due after ten years 5,963 5,751 5,962 6,009 Subtotal 7,936 7,828 7,940 8,105 Corporate securities Due in one year or less 2,403 2,430 2,392 2,433 Due after one year through five years 3,493 3,505 3,493 3,491 Due after five years through ten years 4,000 3,790 4,000 3,676 Due after ten years 2,000 1,820 2,000 1,400 Subtotal 11,896 11,545 11,885 11,000 Municipal bonds Due in one year or less 100 100 101 101 Due after one year through five years 3,743 3,939 3,749 3,980 Due after five years through ten years 7,951 8,254 7,994 8,321 Due after ten years 84,800 85,356 57,728 59,455 Subtotal 96,594 97,649 69,572 71,857 Mortgage-backed securities Federal National Mortgage Association (“FNMA”) 49,693 50,894 47,675 50,005 Federal Home Loan Mortgage Corporation (“FHLMC”) 11,189 11,204 11,825 11,913 Government National Mortgage Association (“GNMA”) 5,222 5,303 6,222 6,269 Subtotal 66,104 67,401 65,722 68,187 U.S. Small Business Administration securities Due after one year through five years 3,470 3,554 2,266 2,353 Due after five years through ten years 5,192 5,355 8,097 8,333 Due after ten years 7,847 7,979 8,078 8,183 Subtotal 16,509 16,888 18,441 18,869 Total securities available-for-sale 199,039 201,311 173,560 178,018 SECURITIES HELD-TO-MATURITY Corporate securities Due after five years through ten years 7,500 7,873 7,500 7,556 Total securities held-to-maturity 7,500 7,873 7,500 7,556 Total securities $ 206,539 $ 209,184 $ 181,060 $ 185,574 There were no sales proceeds, gains or losses for the three months ended March 31, 2021 and 2020 from securities available-for-sale.

Loans Receivable and Allowance

Loans Receivable and Allowance For Loan Losses	3 Months Ended
Loans Receivable and Allowance For Loan Losses	Mar. 31, 2021
Receivables [Abstract]
Loans Receivable and Allowance For Loan Losses	NOTE 3 - LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES The composition of the loan portfolio was as follows at March 31, 2021 and December 31, 2020: March 31, December 31, REAL ESTATE LOANS 2021 2020 Commercial $ 226,799 $ 222,719 Construction and development 241,677 216,975 Home equity 41,352 43,093 One-to-four-family (excludes loans held for sale) 299,316 311,093 Multi-family 122,623 131,601 Total real estate loans 931,767 925,481 CONSUMER LOANS Indirect home improvement 294,455 286,020 Marine 85,275 85,740 Other consumer 3,119 3,418 Total consumer loans 382,849 375,178 COMMERCIAL BUSINESS LOANS Commercial and industrial 261,932 224,476 Warehouse lending 48,537 49,092 Total commercial business loans 310,469 273,568 Total loans receivable, gross 1,625,085 1,574,227 Allowance for loan losses (27,375) (26,172) Deferred costs and fees, net (5,278) (4,017) Premiums on purchased loans, net 628 943 Total loans receivable, net $ 1,593,060 $ 1,544,981 Most of the Company’s commercial and multi-family real estate, construction, residential, and/or commercial business lending activities are with customers located in Western Washington and near the loan production office located in the Tri-Cities, Washington. The Company originates real estate, consumer, and commercial business loans and has concentrations in these areas, however, indirect home improvement loans, including solar-related home improvement loans, are originated through a network of home improvement contractors and dealers located throughout Washington, Oregon, California, Idaho, Colorado, Arizona, Minnesota, and Nevada. Loans are generally secured by collateral and rights to collateral vary and are legally documented to the extent practicable. Local economic conditions may affect borrowers’ ability to meet the stated repayment terms. At March 31, 2021, the Bank held approximately $772.0 million in loans that are pledged as collateral for FHLB advances, compared to approximately $774.8 million at December 31, 2020. The Bank held approximately $377.3 million in loans that are pledged as collateral for the Federal Reserve Bank of San Francisco (“FRB”) line of credit at March 31, 2021, compared to approximately $369.2 million at December 31, 2020. At March 31, 2021, the Bank held $83.8 million of loans originated under the U.S. Small Business Administration’s (“SBA”) Paycheck Protection Program (“PPP”) which qualify as collateral for non-recourse advances under the FRB’s Paycheck Protection Program Liquidity Facility (“PPPLF”). Included in the carrying value of gross loans are net discounts on loans purchased in the Anchor Bank acquisition in November 2018 (“Anchor Acquisition”). The remaining net discount on loans acquired was $1.3 million and $1.5 million, on $121.9 million and $132.6 million of gross loans at March 31, 2021 and December 31, 2020, respectively. The Company has defined its loan portfolio into three segments that reflect the structure of the lending function, the Company’s strategic plan and the manner in which management monitors performance and credit quality. The three loan portfolio segments are: (a) Real Estate Loans, (b) Consumer Loans, and (c) Commercial Business Loans. Each of these segments is disaggregated into classes based on the risk characteristics of the borrower and/or the collateral type securing the loan. The following is a summary of each of the Company’s loan portfolio segments and classes: Real Estate Loans Commercial Lending Construction and Development Lending Home Equity Lending One-to-Four-Family Real Estate Lending Multi-Family Lending Consumer Loans Indirect Home Improvement Marine Other Consumer. Commercial Business Loans Commercial and Industrial Lending (“C&I”) Warehouse Lending The following tables detail activity in the allowance for loan losses by loan categories at or for the three months ended March 31, 2021 and 2020: At or For the Three Months Ended March 31, 2021 Commercial ALLOWANCE FOR LOAN LOSSES Real Estate Consumer Business Unallocated Total Beginning balance $ 13,846 $ 6,696 $ 4,939 $ 691 $ 26,172 (Recapture) provision for loan losses (231) 378 768 585 1,500 Charge-offs — (503) (38) — (541) Recoveries — 244 — — 244 Net charge-offs — (259) (38) — (297) Ending balance $ 13,615 $ 6,815 $ 5,669 $ 1,276 $ 27,375 Period end amount allocated to: Loans individually evaluated for impairment $ 15 $ 241 $ 1,169 $ — $ 1,425 Loans collectively evaluated for impairment 13,600 6,574 4,500 1,276 25,950 Ending balance $ 13,615 $ 6,815 $ 5,669 $ 1,276 $ 27,375 LOANS RECEIVABLE Loans individually evaluated for impairment $ 2,896 $ 689 $ 5,691 $ — $ 9,276 Loans collectively evaluated for impairment 928,871 382,160 304,778 — 1,615,809 Ending balance $ 931,767 $ 382,849 $ 310,469 $ — $ 1,625,085 At or For the Three Months Ended March 31, 2020 Commercial ALLOWANCE FOR LOAN LOSSES Real Estate Consumer Business Unallocated Total Beginning balance $ 6,206 $ 3,766 $ 3,254 $ 3 $ 13,229 Provision for loan losses 1,019 660 824 1,183 3,686 Charge-offs — (370) (11) — (381) Recoveries 18 143 177 — 338 Net recoveries (charge-offs) 18 (227) 166 — (43) Ending balance $ 7,243 $ 4,199 $ 4,244 $ 1,186 $ 16,872 Period end amount allocated to: Loans individually evaluated for impairment $ 15 $ 231 $ — $ — $ 246 Loans collectively evaluated for impairment 7,228 3,968 4,244 1,186 16,626 Ending balance $ 7,243 $ 4,199 $ 4,244 $ 1,186 $ 16,872 LOANS RECEIVABLE Loans individually evaluated for impairment $ 2,528 $ 664 $ — $ — $ 3,192 Loans collectively evaluated for impairment 860,148 334,431 214,103 — 1,408,682 Ending balance $ 862,676 $ 335,095 $ 214,103 $ — $ 1,411,874 Nonaccrual and Past Due Loans As a result of the COVID-19 pandemic, the Company has and will continue to assist customers with an array of payment programs during periods of financial hardship, including forbearance. Forbearance allows a borrower to temporarily not make scheduled payments or to make smaller than scheduled payments, in each case for a specified period of time. Forbearance does not grant any reduction in the total principal or interest repayment obligation. While a loan is in forbearance status, interest continues to accrue and is repaid over a specified time period when the loan re-enters repayment status. As of March 31, 2021, the amount of loans remaining under payment/relief agreements included commercial real estate loans of $22.9 million, commercial business loans of $11.5 million, a portfolio one-to-four-family loan of $308,000, and consumer loans of $157,000. These loans were classified as current and accruing interest as of March 31, 2021, with the exception of $4.5 million in commercial business loans which were classified as current and not accruing interest. These modifications were not classified as TDRs at March 31, 2021 in accordance with the CARES Act and related bank agency regulatory guidance. Loan modifications in accordance with the CARES Act and related banking agency regulatory guidance are still subject to an evaluation in regard to determining whether or not a loan is deemed to be impaired. At March 31, 2021 and December 31, 2020, the Company had no TDRs. There were no TDRs which incurred a payment default within twelve months of the restructure date during the three-month periods ended March 31, 2021 and 2020. The following tables provide information pertaining to the aging analysis of contractually past due loans and nonaccrual loans at March 31, 2021 and December 31, 2020: March 31, 2021 30-59 60-89 Days Days 90 Days Total Total Past Past or More Past Loans Non- REAL ESTATE LOANS Due Due Past Due Due Current Receivable Accrual Commercial $ — $ — $ — $ — $ 226,799 $ 226,799 $ — Construction and development 509 — 1,850 2,359 239,318 241,677 1,850 Home equity 66 108 414 588 40,764 41,352 522 One-to-four-family 1,651 218 524 2,393 296,923 299,316 524 Multi-family — — — — 122,623 122,623 — Total real estate loans 2,226 326 2,788 5,340 926,427 931,767 2,896 CONSUMER LOANS Indirect home improvement 457 340 174 971 293,484 294,455 626 Marine 67 30 — 97 85,178 85,275 56 Other consumer 42 9 6 57 3,062 3,119 7 Total consumer loans 566 379 180 1,125 381,724 382,849 689 COMMERCIAL BUSINESS LOANS Commercial and industrial — — 1,204 1,204 260,728 261,932 5,691 Warehouse lending — — — — 48,537 48,537 — Total commercial business loans — — 1,204 1,204 309,265 310,469 5,691 Total loans $ 2,792 $ 705 $ 4,172 $ 7,669 $ 1,617,416 $ 1,625,085 $ 9,276 December 31, 2020 30-59 60-89 Days Days 90 Days Total Total Past Past or More Past Loans Non- REAL ESTATE LOANS Due Due Past Due Due Current Receivable Accrual Commercial $ — $ — $ — $ — $ 222,719 $ 222,719 $ — Construction and development 1,850 — — 1,850 215,125 216,975 — Home equity 127 137 219 483 42,610 43,093 636 One-to-four-family 389 404 512 1,305 309,788 311,093 644 Multi-family — — — — 131,601 131,601 — Total real estate loans 2,366 541 731 3,638 921,843 925,481 1,280 CONSUMER LOANS Indirect home improvement 683 331 325 1,339 284,681 286,020 826 Marine 28 77 22 127 85,613 85,740 44 Other consumer 73 22 — 95 3,323 3,418 1 Total consumer loans 784 430 347 1,561 373,617 375,178 871 COMMERCIAL BUSINESS LOANS Commercial and industrial — 1,204 — 1,204 223,272 224,476 5,610 Warehouse lending — — — — 49,092 49,092 — Total commercial business loans — 1,204 — 1,204 272,364 273,568 5,610 Total loans $ 3,150 $ 2,175 $ 1,078 $ 6,403 $ 1,567,824 $ 1,574,227 $ 7,761 There were no loans 90 days or more past due and still accruing interest at both March 31, 2021 and December 31, 2020. The following tables provide additional information about our impaired loans that have been segregated to reflect loans for which no allowance for loan losses has been provided and loans for which an allowance was provided at March 31, 2021 and December 31, 2020: March 31, 2021 Unpaid WITH NO RELATED ALLOWANCE RECORDED Principal Recorded Related Real estate loans: Balance Investment Allowance Construction and development $ 1,850 $ 1,850 $ — Home equity 578 522 — One-to-four-family 513 464 — 2,941 2,836 — WITH RELATED ALLOWANCE RECORDED Real estate loans: One-to-four-family 61 60 15 Consumer loans: Indirect 626 626 219 Marine 56 56 20 Other consumer 7 7 2 Commercial business loans: Commercial and industrial 5,691 5,691 1,169 6,441 6,440 1,425 Total $ 9,382 $ 9,276 $ 1,425 December 31, 2020 Unpaid WITH NO RELATED ALLOWANCE RECORDED Principal Recorded Related Real estate loans: Balance Investment Allowance Home equity 687 636 — One-to-four-family 645 584 — Commercial business loans: Commercial and industrial 1,203 1,203 — 2,535 2,423 — WITH RELATED ALLOWANCE RECORDED Real estate loans: One-to-four-family 61 60 15 Consumer loans: Indirect 826 826 289 Marine 44 44 15 Other consumer 1 1 1 Commercial business loans: Commercial and industrial 4,407 4,407 990 5,339 5,338 1,310 Total $ 7,874 $ 7,761 $ 1,310 The following tables present the average recorded investment in loans individually evaluated for impairment and the interest income recognized and received for the three months ended March 31, 2021 and 2020: At or For the Three Months Ended March 31, 2021 March 31, 2020 WITH NO RELATED ALLOWANCE RECORDED Average Recorded Interest Income Average Recorded Interest Income Real estate loans: Investment Recognized Investment Recognized Commercial $ — $ — $ 1,084 $ 8 Construction and development 1,850 — — — Home equity 652 2 220 — One-to-four-family 543 2 1,230 5 Consumer loans: Other consumer — — 5 — 3,045 4 2,539 13 WITH AN ALLOWANCE RECORDED Real estate loans: One-to-four-family 60 — 60 — Consumer loans: Indirect 786 14 548 13 Marine 36 1 41 — Other consumer 3 — 1 — Commercial business loans: Commercial and industrial 5,678 — — — 6,563 15 650 13 Total $ 9,608 $ 19 $ 3,189 $ 26 Credit Quality Indicators As part of the Company’s on-going monitoring of credit quality of the loan portfolio, management tracks certain credit quality indicators including trends related to (i) the risk grading of loans, (ii) the level of classified loans, (iii) net charge-offs, (iv) non-performing loans, and (v) the general economic conditions in the Company’s markets. All loans modified due to COVID-19 are separately monitored and any request for continuation of relief beyond the initial modification will be reassessed at that time to determine if a further modification should be granted and if a downgrade in risk rating is appropriate. The Company utilizes a risk grading matrix to assign a risk grade to its real estate and commercial business loans. Loans are graded on a scale of 1 to 10, with loans in risk grades 1 to 6 considered “Pass” and loans in risk grades 7 to 10 are reported as classified loans in the Company’s allowance for loan loss analysis. A description of the 10 risk grades is as follows: ● Grades 1 and 2 - These grades include loans to very high-quality borrowers with excellent or desirable business credit. ● Grade 3 - This grade includes loans to borrowers of good business credit with moderate risk. ● Grades 4 and 5 - These grades include “Pass” grade loans to borrowers of average credit quality and risk. ● Grade 6 - This grade includes loans on management’s “Watch” list and is intended to be utilized on a temporary basis for “Pass” grade borrowers where frequent and thorough monitoring is required due to credit weaknesses and where significant risk-modifying action is anticipated in the near term. ● Grade 7 - This grade is for “Other Assets Especially Mentioned” (“OAEM”) in accordance with regulatory guidelines and includes borrowers where performance is poor or significantly less than expected. ● Grade 8 - This grade includes “Substandard” loans in accordance with regulatory guidelines which represent an unacceptable business credit where a loss is possible if loan weakness is not corrected. ● Grade 9 - This grade includes “Doubtful” loans in accordance with regulatory guidelines where a loss is highly probable. ● Grade 10 - This grade includes “Loss” loans in accordance with regulatory guidelines for which total loss is expected and when identified are charged off. Consumer, Home Equity, and One-to-Four-Family Real Estate Loans Homogeneous loans are risk rated based upon the Federal Financial Institutions Examination Council’s Uniform Retail Credit Classification and Account Management Policy. Loans classified under this policy at the Company are consumer loans which include indirect home improvement, solar, marine, other consumer, and one-to-four-family first and second liens. Under the Uniform Retail Credit Classification Policy, loans that are current or less than 90 days past due are graded “Pass” and risk rated “4” or “5” internally. Loans that are past due more than 90 days are classified “Substandard” and risk graded “8” internally until the loan has demonstrated consistent performance, typically six months of contractual payments. Closed-end loans that are 120 days past due and open-end loans that are 180 days past due are charged off based on the value of the collateral less cost to sell. Management may more conservatively risk rate credits even if paying in accordance with the loan’s repayment terms. Commercial real estate, construction and development, multi-family and commercial business loans are evaluated individually for their risk classification and may be classified as “Substandard” even if current on their loan payment obligations. The following tables summarize risk rated loan balances by category at the dates indicated: March 31, 2021 Special Pass Watch Mention Substandard Doubtful Loss REAL ESTATE LOANS (1 - 5) (6) (7) (8) (9) (10) Total Commercial $ 169,396 $ 53,627 $ 2,842 $ 934 $ — $ — $ 226,799 Construction and development 239,827 — — 1,850 — — 241,677 Home equity 40,830 — — 522 — — 41,352 One-to-four-family 292,142 — 186 6,988 — — 299,316 Multi-family 122,623 — — — — — 122,623 Total real estate loans 864,818 53,627 3,028 10,294 — — 931,767 CONSUMER LOANS Indirect home improvement 293,829 — — 626 — — 294,455 Marine 85,219 — — 56 — — 85,275 Other consumer 3,112 — — 7 — — 3,119 Total consumer loans 382,160 — — 689 — — 382,849 COMMERCIAL BUSINESS LOANS Commercial and industrial 232,615 14,631 4,773 9,913 — — 261,932 Warehouse lending 48,537 — — — — — 48,537 Total commercial business loans 281,152 14,631 4,773 9,913 — — 310,469 Total loans receivable, gross $ 1,528,130 $ 68,258 $ 7,801 $ 20,896 $ — $ — $ 1,625,085 December 31, 2020 Special Pass Watch Mention Substandard Doubtful Loss REAL ESTATE LOANS (1 - 5) (6) (7) (8) (9) (10) Total Commercial $ 157,932 $ 60,834 $ 3,013 $ 940 $ — $ — $ 222,719 Construction and development 212,209 2,917 1,849 — — — 216,975 Home equity 42,457 — — 636 — — 43,093 One-to-four-family 303,610 162 187 7,134 — — 311,093 Multi-family 131,601 — — — — — 131,601 Total real estate loans 847,809 63,913 5,049 8,710 — — 925,481 CONSUMER LOANS Indirect home improvement 285,194 — — 826 — — 286,020 Marine 85,696 — — 44 — — 85,740 Other consumer 3,417 — — 1 — — 3,418 Total consumer loans 374,307 — — 871 — — 375,178 COMMERCIAL BUSINESS LOANS Commercial and industrial 190,392 23,945 2,073 8,066 — — 224,476 Warehouse lending 49,092 — — — — — 49,092 Total commercial business loans 239,484 23,945 2,073 8,066 — — 273,568 Total loans receivable, gross $ 1,461,600 $ 87,858 $ 7,122 $ 17,647 $ — $ — $ 1,574,227

Servicing Rights

Servicing Rights	3 Months Ended
Servicing Rights	Mar. 31, 2021
Fair Value, Off-balance Sheet Risk [Abstract]
Servicing Rights	NOTE 4 - SERVICING RIGHTS Loans serviced for others are not included on the Consolidated Balance Sheets. The unpaid principal balances of permanent loans serviced for others were $2.34 billion and $2.17 billion at March 31, 2021 and December 31, 2020, respectively. At or For the Three Months Ended March 31, 2021 2020 Beginning balance $ 12,595 $ 11,560 Additions 3,144 1,185 Servicing rights amortized (2,054) (1,605) Recovery (impairment) of servicing rights 2,050 (514) Ending balance $ 15,735 $ 10,626 The fair market value of the servicing rights’ assets was $23.3 million and $12.8 million at March 31, 2021 and December 31, 2020, respectively. Fair value adjustments to servicing rights are mainly due to market-based assumptions associated with discounted cash flows, loan prepayment speeds, and changes in interest rates. A significant change in prepayments of the loans in the servicing portfolio could result in significant changes in the valuation adjustments, thus creating potential volatility in the carrying amount of servicing rights. The following provides valuation assumptions used in determining the fair value of mortgage servicing rights (“MSR”) at the dates indicated: At March 31, At December 31, Key assumptions: 2021 2020 Weighted average discount rate 9.1 % 9.1 % Conditional prepayment rate (“CPR”) 14.7 % 32.6 % Weighted average life in years 5.9 3.0 Key economic assumptions of the current fair value for single family MSR are presented in the table below. Also presented is the sensitivity to market rate changes for the par rate coupon for a conventional one-to-four-family FNMA, FHLMC, GNMA, or FHLB serviced home loan. The table below references a 50 basis point and 100 basis point adverse rate change and the impact on prepayment speeds and discount rates at March 31, 2021 and December 31, 2020: March 31, 2021 December 31, 2020 (1) Aggregate portfolio principal balance $ 2,335,329 $ 2,133,473 Weighted average rate of note 3.3 % 3.5 % At March 31, 2021 Base 0.5% Adverse Rate Change 1.0% Adverse Rate Change Conditional prepayment rate 14.7 % 19.6 % 27.0 % Fair value MSR $ 23,256 $ 19,979 $ 16,157 Percentage of MSR 1.0 % 0.9 % 0.7 % Discount rate 9.1 % 9.6 % 10.1 % Fair value MSR $ 23,256 $ 22,820 $ 22,400 Percentage of MSR 1.0 % 1.0 % 1.0 % At December 31, 2020 Base 0.5% Adverse Rate Change 1.0% Adverse Rate Change Conditional prepayment rate 32.6 % 40.6 % 59.6 % Fair value MSR $ 12,833 $ 10,922 $ 8,286 Percentage of MSR 0.6 % 0.5 % 0.4 % Discount rate 9.1 % 9.6 % 10.1 % Fair value MSR $ 12,833 $ 12,696 $ 12,562 Percentage of MSR 0.6 % 0.6 % 0.6 % ___________________________ (1) Excludes nonperforming serviced loans in forbearance. These sensitivities are hypothetical and should be used with caution as the tables above demonstrate the Company’s methodology for estimating the fair value of MSR which is highly sensitive to changes in key assumptions. For example, actual prepayment experience may differ and any difference may have a material effect on MSR fair value. Changes in fair value resulting from changes in assumptions generally cannot be extrapolated because the relationship of the change in the assumption to the change in fair value may not be linear. Also, in these tables, the effects of a variation in a particular assumption on the fair value of the MSR is calculated without changing any other assumption; in reality, changes in one factor may be associated with changes in another (for example, decreases in market interest rates may provide an incentive to refinance, however, this may also indicate a slowing economy and an increase in the unemployment rate, which reduces the number of borrowers who qualify for refinancing), which may magnify or counteract the sensitivities. Thus, any measurement of MSR fair value is limited by the conditions existing and assumptions made at a particular point in time. Those assumptions may not be appropriate if they are applied to a different point in time. The Company recorded $1.4 million and $977,000 of gross contractually specified servicing fees, late fees, and other ancillary fees resulting from servicing of loans for the three months ended March 31, 2021 and 2020, respectively. The income, net of amortization, or the reduction in income, if MSR amortization is greater than servicing fees, is reported in noninterest income on the Consolidated Statements of Income.

Derivatives

Derivatives	3 Months Ended
Derivatives	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	NOTE 5 - DERIVATIVES The Company regularly enters into commitments to originate and sell loans held for sale. The Company has established a hedging strategy to protect itself against the risk of loss associated with interest rate movements on loan commitments. The Company enters into contracts to sell forward To-Be-Announced (“TBA”) mortgage-backed securities. These commitments and contracts are considered derivatives but have not been designated as hedging instruments for reporting purposes under U.S. GAAP. Rather, they are accounted for as free-standing derivatives, or economic hedges, with changes in the fair value of the derivatives reported in noninterest income or noninterest expense. The Company recognizes all derivative instruments as either other assets or other liabilities on the Consolidated Balance Sheets and measures those instruments at fair value. Derivative instruments not related to mortgage banking activities primarily relate to interest rate swap agreements. The Company's objectives in using certain interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The Company has entered into interest rate swaps to reduce the exposure to variability in interest-related cash outflows attributable to changes in forecasted LIBOR-based borrowings and brokered deposits. These derivative instruments are designated as cash flow hedges. The hedged item is the LIBOR portion of the series of future adjustable-rate borrowings and deposits over the term of the interest rate swap. Accordingly, changes to the amount of interest payment cash flows for the hedged transactions attributable to a change in credit risk are excluded from management’s assessment of hedge effectiveness. The Company tests for hedging effectiveness on a quarterly basis. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The Company has not recorded any hedge ineffectiveness since inception. The Company has master netting agreements with derivative dealers with which it does business, but reflects gross assets and liabilities as other assets and other liabilities, respectively, on the Consolidated Balance Sheets. The net unrealized loss on cash flow hedges recorded in accumulated other comprehensive income was $63,000 and $967,000 , net of tax, at March 31, 2021 and December 31, 2020, respectively. The Company reclassified realized losses of $114,000 and $1,000 from accumulated other comprehensive income to interest expense related to these cash flow hedges for the three months ended March 31, 2021 and March 31, 2020, respectively. The Company expects that approximately $477,000 will be reclassified from accumulated other comprehensive income as an increase to interest expense over the next twelve months related to these cash flow hedges. The following tables summarize the Company’s derivative instruments at the dates indicated: March 31, 2021 Fair Value Cash flow hedges: Notional Asset Liability Interest rate swaps $ 90,000 $ 650 $ 731 Non-hedging derivatives: Fallout adjusted interest rate lock commitments with customers 129,059 1,985 — Mandatory and best effort forward commitments with investors 47,433 506 — Forward TBA mortgage-backed securities 213,000 3,232 — December 31, 2020 Fair Value Cash flow hedges: Notional Asset Liability Interest rate swaps $ 90,000 $ 21 $ 1,252 Non-hedging derivatives: Fallout adjusted interest rate lock commitments with customers 136,739 4,024 — Mandatory and best effort forward commitments with investors 25,027 — 67 Forward TBA mortgage-backed securities 232,000 — 1,602 At March 31, 2021 and December 31, 2020, the Company had $213.0 million and $232.0 million of TBA trades with counterparties that required margin collateral of $201,000 and $3.3 million, respectively. At March 31, 2021, the Bank had pledged two securities with a carrying value of $3.3 million to secure interest rate swaps designated as cash flow hedges. Changes in the fair value of the non-hedging derivatives recognized in noninterest income on the Consolidated Statements of Income and included in gain on sale of loans resulted in a net loss of $931,000 and a net gain of $1.7 million for the three months ended March 31, 2021 and 2020, respectively.

Leases

Leases	3 Months Ended
Leases	Mar. 31, 2021
Leases [Abstract]
Leases	NOTE 6 - LEASES The Company has operating leases for retail bank and home lending branches, and certain equipment. The Company’s leases have remaining lease terms of two months to nine years and three months, some of which include options to extend The components of lease cost (included in occupancy expense on the Consolidated Statements of Income) are as follows for the three months ended March 31, 2021 and 2020: Three Months Ended Three Months Ended Lease cost: March 31, 2021 March 31, 2020 Operating lease cost $ 348 $ 343 Short-term lease cost 1 8 Total lease cost $ 349 $ 351 The following tables provides supplemental information related to operating leases at or for the three months ended March 31, 2021 and 2020: At or For the At or For the Cash paid for amounts included in the Three Months Ended Three Months Ended measurement of lease liabilities: March 31, 2021 March 31, 2020 Operating cash flows from operating leases $ 349 $ 336 Weighted average remaining lease term- operating leases 5.1 years 5.2 years Weighted average discount rate- operating leases 2.33 % 2.97 % The Company’s leases typically do not contain a discount rate implicit in the lease contract. As an alternative, the discount rate used in determining the lease liability for each individual lease was the FHLB of Des Moines’ fixed advance rate. Maturities of operating lease liabilities at March 31, 2021 for future periods are as follows: Remainder of 2021 $ 1,026 2022 1,336 2023 954 2024 882 2025 530 Thereafter 949 Total lease payments 5,677 Less imputed interest (392) Total $ 5,285

Other Real Estate Owned

Other Real Estate Owned	3 Months Ended
Other Real Estate Owned	Mar. 31, 2021
Banking and Thrift [Abstract]
Other Real Estate Owned	NOTE 7 - OTHER REAL ESTATE OWNED (“OREO”) The following table presents the activity related to OREO at or for the three months ended March 31, 2021 and 2020: At or For the Three Months Ended March 31, 2021 2020 Beginning balance $ 90 $ 168 Additions — — Gross proceeds from sale of OREO (81) (76) Loss on sale of OREO (9) (2) Ending balance $ — $ 90 There were no OREO properties at March 31, 2021, compared to one OREO property in the amount of $90,000 at March 31, 2020. There were no holding costs for the three months ended March 31, 2021 and 2020. There were $675,000 in mortgage loans collateralized by residential real estate property in the process of foreclosure

Deposits

Deposits	3 Months Ended
Deposits	Mar. 31, 2021
Banking and Thrift [Abstract]
Deposits	NOTE 8 - DEPOSITS Deposits are summarized as follows at March 31, 2021 and December 31, 2020: March 31, December 31, 2021 2020 Noninterest-bearing checking $ 390,855 $ 348,421 Interest-bearing checking 250,907 226,282 Savings 161,140 152,842 Money market 468,753 429,548 Certificates of deposit less than $100,000 285,505 299,157 Certificates of deposit of $100,000 through $250,000 133,570 135,901 Certificates of deposit of $250,000 and over 66,528 67,488 Escrow accounts related to mortgages serviced 23,535 14,432 Total $ 1,780,793 $ 1,674,071 Scheduled maturities of time deposits at March 31, 2021 for future periods ending are as follows: At March 31, 2021 Maturing in 2021 $ 282,288 Maturing in 2022 119,901 Maturing in 2023 21,159 Maturing in 2024 24,156 Maturing in 2025 35,926 Thereafter 2,173 Total $ 485,603 Interest expense by deposit category for the three months ended March 31, 2021 and 2020 is as follows: Three Months Ended March 31, 2021 2020 Interest-bearing checking $ 50 $ 136 Savings and money market 468 826 Certificates of deposit 1,464 2,845 Total $ 1,982 $ 3,807

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 9 - COMMITMENTS AND CONTINGENCIES Commitments - The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The following table provides a summary of the Company’s commitments at March 31, 2021 and December 31, 2020: COMMITMENTS TO EXTEND CREDIT March 31, December 31, REAL ESTATE LOANS 2021 2020 Commercial $ 1,267 $ 1,293 Construction and development 128,095 143,666 One-to-four-family (includes locks for saleable loans) 146,466 147,712 Home equity 53,279 52,457 Multi-family 652 658 Total real estate loans 329,759 345,786 CONSUMER LOANS 23,279 23,365 COMMERCIAL BUSINESS LOANS Commercial and industrial 106,959 106,171 Warehouse lending 51,963 52,909 Total commercial business loans 158,922 159,080 Total commitments to extend credit $ 511,960 $ 528,231 Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Since many of the commitments are expected to expire without being drawn upon, the amount of the total commitments do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon an extension of credit, is based on management’s credit evaluation of the party. Collateral held varies, but may include accounts receivable, inventory, property and equipment, residential real estate, and income-producing commercial properties. Unfunded commitments under commercial lines of credit, revolving credit lines, and overdraft protection agreements are commitments for possible future extensions of credit to existing customers. These lines of credit are uncollateralized and usually do not contain a specified maturity date and ultimately may not be drawn upon to the total extent to which the Company is committed. The Company has established reserves for estimated losses from unfunded commitments of $398,000 at March 31, 2021 and $407,000 at December 31, 2020. One-to-four-family commitments included in the table above are accounted for as fair value derivatives and do not carry an associated holdback. The Company’s derivative positions are presented with discussion in “Note 5 - Derivatives.” The Company also sells one-to-four-family loans to the FHLB of Des Moines that require a limited level of recourse if the loans default and exceed a certain loss exposure. Specific to that recourse, the FHLB of Des Moines established a first loss account (“FLA”) related to the loans and required a credit enhancement (“CE”) obligation by the Bank to be utilized after the FLA is used. Based on loans sold through March 31, 2021, the total loans sold to the FHLB were $22.5 million with the FLA totaling $938,000 and the CE obligation at $811,000 or 3.6% of the loans outstanding. Management has established a holdback of 10% of the outstanding CE, or $272,000, which is a part of the off-balance sheet holdback for loans sold. At March 31, 2021, there were no loans sold to the FHLB of Des Moines greater than 30 days past their contractual payment due date, compared to loans totaling $498,000 at December 31, 2020. Contingent liabilities for loans held for sale - The Company has entered into a severance agreement with its Chief Executive Officer (“CEO”). The severance agreement, subject to certain requirements, generally includes a lump sum payment to the CEO equal to 24 months of base compensation in the event his employment is involuntarily terminated, other than for cause or the executive terminates his employment with good reason, as defined in the severance agreement. The Company has entered into change of control agreements with its Chief Financial Officer, Chief Operating Officer, Chief Lending Officer, Chief Credit Officer, Chief Risk Officer, Chief Human Resources Officer, Senior Vice President Compliance Officer, Executive Vice President of Retail Banking and Marketing, and the Executive Vice President of Home Lending. The change of control agreements, subject to certain requirements, generally remain in effect until canceled by either party upon at least 24 months prior written notice. Under the change of control agreements, the executive generally will be entitled to a change of control payment from the Company if the executive is involuntarily terminated within six months preceding or 12 months after a change in control (as defined in the change of control agreements). In such an event, the executives would each be entitled to receive a cash payment in an amount equal to 12 As a result of the nature of our activities, the Company is subject to various pending and threatened legal actions, which arise in the ordinary course of business. From time to time, subordination liens may create litigation which requires us to defend our lien rights. In the opinion of management, liabilities arising from these claims, if any, will not have a material effect on our financial position. The Company had no material pending legal actions at March 31, 2021.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
Fair Value Measurements	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE 10 - FAIR VALUE MEASUREMENTS The Company determines fair value based on the requirements established in Accounting Standards Codification (“ASC”) Topic 820, Fair Value Measurements, and requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. ASC 820 defines fair value as the exit price, or the price that would be received for an asset or paid to transfer a liability, in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date under current market conditions. ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities, The following definitions describe the levels of inputs that may be used to measure fair value: Level 1 Level 2 Level 3 The following methods were used to estimate the fair value of certain assets and liabilities on a recurring and nonrecurring basis: Securities - Mortgage Loans Held for Sale - Derivative Instruments - Impaired Loans Other Real Estate Owned Servicing Rights - The following tables present securities available-for-sale, mortgage loans held for sale, and derivative assets and liabilities measured at fair value on a recurring basis at the dates indicated: Financial Assets At March 31, 2021 Securities available-for-sale: Level 1 Level 2 Level 3 Total U.S. agency securities $ — $ 7,828 $ — $ 7,828 Corporate securities — 10,560 985 11,545 Municipal bonds — 97,505 144 97,649 Mortgage-backed securities — 67,401 — 67,401 U.S. Small Business Administration securities — 16,888 — 16,888 Mortgage loans held for sale, at fair value — 156,281 — 156,281 Derivatives: Mandatory and best effort forward commitments with investors — — 506 506 Forward TBA mortgage-backed securities — 3,232 — 3,232 Interest rate swaps — 650 — 650 Interest rate lock commitments with customers — — 1,985 1,985 Total assets measured at fair value $ — $ 360,345 $ 3,620 $ 363,965 Financial Liabilities Derivatives: Interest rate swaps $ — $ (731) $ — $ (731) Total liabilities measured at fair value $ — $ (731) $ — $ (731) Financial Assets At December 31, 2020 Securities available-for-sale: Level 1 Level 2 Level 3 Total U.S. agency securities $ — $ 8,105 $ — $ 8,105 Corporate securities — 10,016 984 11,000 Municipal bonds — 71,730 127 71,857 Mortgage-backed securities — 68,187 — 68,187 U.S. Small Business Administration securities — 18,869 — 18,869 Mortgage loans held for sale, at fair value — 166,448 — 166,448 Derivatives: Interest rate swaps — 21 — 21 Interest rate lock commitments with customers — — 4,024 4,024 Total assets measured at fair value $ — $ 343,376 $ 5,135 $ 348,511 Financial Liabilities Derivatives: Mandatory and best effort forward commitments with investors $ — $ — $ (67) $ (67) Forward TBA mortgage-backed securities — (1,602) — (1,602) Interest rate swaps — (1,252) — (1,252) Total liabilities measured at fair value $ — $ (2,854) $ (67) $ (2,921) The following tables present impaired loans, OREO, and servicing rights measured at fair value on a nonrecurring basis for which a nonrecurring change in fair value has been recorded during the reporting periods indicated. The amounts disclosed below represent the fair values at the time the nonrecurring fair value measurements were evaluated. March 31, 2021 Level 1 Level 2 Level 3 Total Impaired loans $ — $ — $ 9,276 $ 9,276 Servicing rights — — 23,256 23,256 December 31, 2020 Level 1 Level 2 Level 3 Total Impaired loans $ — $ — $ 7,761 $ 7,761 OREO — — 90 90 Servicing rights — — 12,833 12,833 Quantitative Information about Level 3 Fair Value Measurements Level 3 Significant Weighted Average Fair Value Valuation Unobservable March 31, December 31, Instruments Techniques Inputs Range 2021 2020 RECURRING Interest rate lock commitments with customers Quoted market prices Pull-through expectations 80% - 99% 93.0 % 91.6 % Individual forward sale commitments with investors Quoted market prices Pull-through expectations 80% - 99% 93.0 % 91.6 % Corporate securities Discounted cash flows Discount rate 2.5% 2.5 % 2.5 % Municipal bonds Discounted cash flows Discount rate 6.4% 6.4 % 6.4 % NONRECURRING Impaired loans Fair value of underlying collateral Discount applied to the obtained appraisal 10.0% 10.0 % 10.0 % OREO Fair value of collateral Discount applied to the obtained appraisal 10.0% N/A 10.0 % Servicing rights Industry sources Pre-payment speeds 0% - 50% 14.7 % 32.6 % An increase in the pull-through rate utilized in the fair value measurement of the interest rate lock commitments with customers and forward sale commitments with investors will result in positive fair value adjustments (and an increase in the fair value measurement). Conversely, a decrease in the pull-through rate will result in a negative fair value adjustment (and a decrease in the fair value measurement). The following tables provides a reconciliation of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the three months ended March 31, 2021 and 2020: Purchases Net change in Net change in Three Months Ended Beginning and Sales and Ending fair value for fair value for March 31, 2021 Balance Issuances Settlements Balance gains/(losses) (1) gains/(losses) (2) Interest rate lock commitments with customers $ 4,024 $ 7,691 $ (9,730) $ 1,985 $ (2,039) $ — Individual forward sale commitments with investors (67) 654 (81) 506 573 — Securities available-for-sale, at fair value 1,111 21 (3) 1,129 — 21 March 31, 2020 Interest rate lock commitments with customers $ 557 $ 7,411 $ (3,677) $ 4,291 $ 3,734 $ — Individual forward sale commitments with investors (195) (531) 545 (181) 14 — Securities available-for-sale, at fair value 1,162 12 (3) 1,171 — 12 _______________________________ (1) Relating to items held at end of period included in income. (2) Relating to items held at end of period included in other comprehensive income. Gains (losses) on interest rate lock commitments carried at fair value are recorded in other noninterest income. Gains (losses) on forward sale commitments with investors carried at fair value are recorded in noninterest income. The following table provides estimated fair values of the Company’s financial instruments at March 31, 2021 and December 31, 2020, whether or not recognized at fair value on the Consolidated Balance Sheets: March 31, December 31, 2021 2020 Financial Assets Carrying Fair Carrying Fair Level 1 inputs: Amount Value Amount Value Cash and cash equivalents $ 85,446 $ 85,446 $ 91,576 $ 91,576 Certificates of deposit at other financial institutions 12,278 12,278 12,278 12,278 Level 2 inputs: Securities available-for-sale, at fair value 200,182 200,182 176,907 176,907 Securities held-to-maturity 7,500 7,873 7,500 7,556 Loans held for sale, at fair value 156,281 156,281 166,448 166,448 FHLB stock, at cost 6,475 6,475 7,439 7,439 Forward TBA mortgage-backed securities 3,232 3,232 — — Interest rate swaps 650 650 21 21 Accrued interest receivable 7,429 7,429 7,030 7,030 Level 3 inputs: Securities available-for-sale, at fair value 1,129 1,129 1,111 1,111 Loans receivable, gross 1,625,085 1,656,583 1,574,227 1,580,360 Servicing rights, held at lower of cost or fair value 15,735 23,256 12,595 12,833 Fair value interest rate locks with customers 1,985 1,985 4,024 4,024 Mandatory and best effort forward commitments with investors 506 506 — — Financial Liabilities Level 2 inputs: Deposits 1,780,793 1,778,529 1,674,071 1,674,328 Borrowings 72,528 74,000 165,809 167,680 Subordinated notes 49,344 50,500 10,000 11,083 Accrued interest payable 367 367 406 406 Interest rate swaps 731 731 1,252 1,252 Forward TBA mortgage-backed securities — — 1,602 1,602 Level 3 inputs: Mandatory and best effort forward commitments with investors — — 67 67

Employee Benefits

Employee Benefits	3 Months Ended
Employee Benefits	Mar. 31, 2021
Compensation and Retirement Disclosure [Abstract]
Employee Benefits	NOTE 11 - EMPLOYEE BENEFITS Employee Stock Ownership Plan On January 1, 2012, the Company established an ESOP for eligible employees of the Company and the Bank. Employees of the Company and the Bank are eligible to participate in the ESOP if they have been credited with at least 1,000 hours 1,000 The ESOP borrowed $2.6 million from FS Bancorp, Inc. and used those funds to acquire 259,210 shares of FS Bancorp, Inc. common stock in the open market at an average price of $10.17 per share during the second half of 2012. It is anticipated that the Bank will make contributions to the ESOP in amounts necessary to amortize the ESOP loan payable to FS Bancorp, Inc. over a period of 10 years, bearing interest at 2.30%. Intercompany expenses associated with the ESOP are eliminated in consolidation. Shares purchased by the ESOP with the loan proceeds are held in a suspense account and allocated to ESOP participants on a pro rata basis as principal and interest payments are made by the ESOP to FS Bancorp, Inc. The loan is secured by shares purchased with the loan proceeds and will be repaid by the ESOP with funds from the Bank’s discretionary contributions to the ESOP and earnings on the ESOP assets. Payments of principal and interest are due annually on December 31, the Company’s fiscal year end. On December 31, 2020, the ESOP paid the ninth annual installment of principal in the amount of $282,000, plus accrued interest of $13,000 pursuant to the ESOP loan agreement. As shares are committed to be released from collateral, the Company reports compensation expense equal to the average daily market prices of the shares for the quarter ended March 31, 2021. These shares become outstanding for earnings per share computations. The compensation expense is accrued monthly throughout the year. Dividends on allocated ESOP shares are recorded as a reduction of retained earnings; dividends on unallocated ESOP shares are recorded as a reduction of debt and accrued interest. Compensation expense related to the ESOP for the three months ended March 31, 2021 and 2020 was $402,000 and $325,000, respectively. Shares held by the ESOP at March 31, 2021 and 2020 were as follows (shown as actual): Balances Balances at March 31, 2021 at March 31, 2020 Allocated shares 213,744 189,511 Committed to be released shares 6,480 6,480 Unallocated shares 19,441 45,362 Total ESOP shares 239,665 241,353 Fair value of unallocated shares (in thousands) $ 1,205 $ 2,276

Earnings Per Share

Earnings Per Share	3 Months Ended
Earnings Per Share	Mar. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 12 - EARNINGS PER SHARE The Company computes earnings per share using the two-class method, which is an earnings allocation method for computing earnings per share that treats a participating security as having rights to earnings that would otherwise have been available to common shareholders. Basic earnings per share are computed by dividing income available to common shareholders by the weighted average number of common shares outstanding for the period. Unvested share-based awards containing non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and are included in the computation of earnings per share pursuant to the two-class method. Diluted earnings per share reflect the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity. For earnings per share calculations, the ESOP shares committed to be released are included as outstanding shares for both basic and diluted earnings per share. The following table presents a reconciliation of the components used to compute basic and diluted earnings per share for the three months ended March 31, 2021 and 2020: At or For the Three Months Ended March 31, Numerator (in thousands): 2021 2020 Net income $ 11,883 $ 5,167 Dividends and undistributed earnings allocated to participating securities (170) (56) Net income available to common shareholders $ 11,713 $ 5,111 Denominator (shown as actual): Basic weighted average common shares outstanding 4,215,376 4,391,499 Dilutive shares 123,708 87,419 Diluted weighted average common shares outstanding 4,339,084 4,478,918 Basic earnings per share $ 2.78 $ 1.16 Diluted earnings per share $ 2.70 $ 1.14 Potentially dilutive weighted average share options that were not included in the computation of diluted earnings per share because to do so would be anti-dilutive 5,294 41,627

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
Stock-Based Compensation	Mar. 31, 2021
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	NOTE 13 - STOCK-BASED COMPENSATION Stock Options and Restricted Stock On May 17, 2018, the shareholders of FS Bancorp, Inc. approved the 2018 Equity Incentive Plan (the “2018 Plan”) that authorizes 650,000 shares of the Company’s common stock to be awarded. The 2018 Plan provides for the grant of incentive stock options, non-qualified stock options, and up to 163,000 restricted stock awards (“RSAs”) to directors, emeritus directors, officers, employees or advisory directors of the Company. On August 15, 2020, the Company awarded grants of 24,880 RSAs and 62,285 stock options with an exercise price equal to the market price of FS Bancorp’s common stock on the grant date of $42.70 per share. At March 31, 2021, there were 274,000 stock option awards and 92,905 RSAs available to be granted under the 2018 Plan. In September 2013, the shareholders of FS Bancorp, Inc. approved the FS Bancorp, Inc. 2013 Equity Incentive Plan (the “2013 Plan”). The Plan provided for the grant of stock options and RSAs. The 2013 Plan authorized the grant of stock options totaling 324,013 shares of common stock to Company directors and employees of which 322,000 stock options were granted with an exercise price equal to the market price of FS Bancorp’s common stock on the grant date of May 8, 2014, of $16.89 per share. The 2013 Plan authorized the grant of RSAs totaling 129,605 shares to Company directors, advisory directors, emeritus directors, officers, and employees, all of which have been granted. All options and RSAs previously granted have vested as of March 31, 2021. At March 31, 2021, there were 6,013 stock option awards available to be granted under the 2013 Plan. Total share-based compensation expense was $295,000 and $224,000 for the three months ended March 31, 2021 and 2020, respectively. Stock Options Both plans consist of stock option awards that may be granted as incentive stock options or non-qualified stock options. Stock option awards generally vest at one year for independent directors or over a five-year period for employees and officers with 20% vesting on the anniversary date of each grant date as long as the award recipient remains in service to the Company. The options are exercisable after vesting for up to the remaining term of the original grant. The maximum term of the options granted is 10 years. Any unexercised stock options will expire 10 years after the grant date or sooner in the event of the award recipient’s termination of service with the Company or the Bank. The fair value of each stock option award is estimated on the grant date using a Black-Scholes Option pricing model that uses the following assumptions. The dividend yield is based on the current quarterly dividend in effect at the time of the grant. Historical employment data is used to estimate the forfeiture rate. The Company elected to use Staff Accounting Bulletin 107, simplified expected term calculation for the “Share-Based Payments” method permitted by the SEC to calculate the expected term. This method uses the vesting term of an option along with the contractual term, setting the expected life at 5.5 years for one-year vesting and 6.5 years for five-year vesting. The following table presents a summary of the Company’s stock option awards during the three months ended March 31, 2021 (shown as actual): Weighted-Average Weighted- Remaining Average Contractual Term In Aggregate Shares Exercise Price Years Intrinsic Value Outstanding at January 1, 2021 335,877 $ 38.90 6.58 $ 5,721,159 Granted — — — — Less exercised 2,500 $ 16.89 — $ 96,175 Forfeited or expired — — — — Outstanding at March 31, 2021 333,377 $ 39.06 6.36 $ 9,380,259 Expected to vest, assuming a 0.31% annual forfeiture rate (1) 332,448 $ 39.04 6.36 $ 9,362,972 Exercisable at March 31, 2021 172,488 $ 28.79 4.47 $ 6,625,647 __________________________ (1) Forfeiture rate has been calculated and estimated to assume a forfeiture of 3.1% of the options forfeited over 10 years. At March 31, 2021, there was $1.3 million of total unrecognized compensation cost related to nonvested stock options granted under the 2018 plan. The cost is expected to be recognized over the remaining weighted-average vesting period of 3.2 years. Restricted Stock Awards The RSAs’ fair value is equal to the value of the stock based on the market price of FS Bancorp’s common stock on the grant date and compensation expense is recognized over the vesting period of the awards based on the fair value of the restricted stock. Shares for the 2018 Plan generally vest at one year for independent directors or over a five-year period for employees and officers beginning on the grant date. Any unvested RSAs will expire after vesting or sooner in the event of the award recipient’s termination of service with the Company or the Bank. The following table presents a summary of the Company’s nonvested awards during the three months ended March 31, 2021 (shown as actual): Weighted-Average Grant-Date Fair Value Nonvested Shares Shares Per Share Nonvested at January 1, 2021 55,092 $ 48.70 Granted — — Less vested — — Forfeited or expired — — Nonvested at March 31, 2021 55,092 $ 48.70 At March 31, 2021, there was $2.2 million of total unrecognized compensation cost related to nonvested shares granted under the 2018 Plan as RSAs. The cost is expected to be recognized over the remaining weighted-average vesting period of 3.4 years.

Regulatory Capital

Regulatory Capital	3 Months Ended
Regulatory Capital	Mar. 31, 2021
Regulatory Capital Requirements [Abstract]
Regulatory Capital	NOTE 14 - REGULATORY CAPITAL The Bank is subject to various regulatory capital requirements administered by the Federal Reserve and the FDIC. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines of the regulatory framework for prompt corrective action, the Bank must meet specific capital adequacy guidelines that involve quantitative measures of the Bank’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The Bank’s capital classification is also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. The federal banking agencies jointly issued a final rule that provides for an optional, simplified measure of capital adequacy, the community bank leverage ratio framework, for qualifying community banking organizations, consistent with Section 201 of the Economic Growth, Regulatory Relief, and Consumer Protection Act. This final rule is applicable to all non-advanced approaches FDIC-supervised institutions with less than $10 billion in total consolidated assets. The community bank leverage ratio (“CBLR”) final rule was effective on January 1, 2020, and will allow qualifying community banking organizations to calculate a leverage ratio to measure capital adequacy. Banks opting into the CBLR framework will not be required to calculate or report risk-based capital. A qualifying community banking organization is defined as having less than $10 billion in total consolidated assets, a leverage ratio greater than 9%, off-balance sheet exposures of 25% or less of total consolidated assets, and trading assets and liabilities of 5% or less of total consolidated assets. The final rule adopts Tier 1 capital and the existing leverage ratio into the community bank leverage ratio framework. A bank electing the framework will not be subject to other capital and leverage requirements. A bank electing the framework that ceases to meet any qualifying criteria in a future period and that has a leverage ratio greater than 8% will be allowed a grace period of two reporting periods to satisfy the CBLR qualifying criteria or comply with the generally applicable capital requirements. A bank may opt out of the framework at any time, without restriction, by reverting to the generally applicable risk-based capital rule. In response to the COVID-19 pandemic, the CARES Act was signed into law on March 27, 2020. Among other things, the CARES Act directs federal banking agencies to adopt interim final rules to lower the threshold under the CBLR from 9% to 8% and to provide a reasonable grace period for a community bank that falls below the threshold to regain compliance, in each case until the earlier of the termination date of the national emergency or December 31, 2020. In April 2020, the federal banking agencies issued two interim final rules implementing this directive. One interim final rule provides that, as of the second quarter 2020, banking organizations with leverage ratios of 8% or greater (and that meet the other existing qualifying criteria) may elect to use the CBLR framework. It also establishes a two-quarter grace period for qualifying community banking organizations whose leverage ratio falls no more than one percentage point below the applicable CBLR requirement, so long as the banking organization maintains a leverage ratio of 7.5% or greater in 2021, or 8% thereafter. The second interim final rule provides a transition from the temporary 8% CBLR requirement to a 9% CBLR requirement. It establishes a minimum CBLR of 8.5% for 2021, and 9% thereafter, and maintains a two-quarter grace period for qualifying community banking organizations whose leverage ratios fall no more than 100 basis points below the applicable CBLR requirement. Effective October 1, 2020, the final rule made no change to the interim final rule issued in April 2020. The FS Bancorp, Inc. is a bank holding company registered with the Federal Reserve. Bank holding companies are subject to capital adequacy requirements of the Federal Reserve under the Bank Holding Company Act of 1956, as amended, and the regulations of the Federal Reserve. Bank holding companies with less than $3.0 billion in assets are generally not subject to compliance with the Federal Reserve’s capital regulations, which are generally the same as the capital regulations applicable to the Bank. The Federal Reserve has a policy that a bank holding company is required to serve as a source of financial and managerial strength to the holding company’s subsidiary bank and expects the holding company’s subsidiary bank to be well capitalized under the prompt corrective action regulations. If FS Bancorp, Inc. was subject to regulatory guidelines for bank holding companies with $3.0 billion or more in assets at March 31, 2021, FS Bancorp, Inc. would have exceeded all regulatory capital requirements. The Tier 1 leverage-based capital ratio calculated for FS Bancorp, Inc. at March 31, 2021 and December 31, 2020 was 10.9% and 11.1%, respectively.

Business Segments

Business Segments	3 Months Ended
Business Segments	Mar. 31, 2021
Segment Reporting [Abstract]
Business Segments	NOTE 15 - BUSINESS SEGMENTS The Company’s business segments are determined based on the products and services provided, as well as the nature of the related business activities, and they reflect the manner in which financial information is currently evaluated by management. This process is dynamic and is based on management’s current view of the Company’s operations and is not necessarily comparable with similar information for other financial institutions. The Company defines its business segments by product type and customer segment which it has organized into two lines of business: commercial and consumer banking and home lending. The Company uses various management accounting methodologies to assign certain income statement items to the responsible operating segment, including: ● ● ● ● ● The FTP methodology is based on management’s estimated cost of originating funds including the cost of overhead for deposit generation. A description of the Company’s business segments and the products and services that they provide is as follows: Commercial and Consumer Banking Segment The commercial and consumer banking segment provides diversified financial products and services to its commercial and consumer customers through Bank branches, automated teller machines (“ATM”), online banking platforms, mobile banking apps, and telephone banking. These products and services include deposit products; residential, consumer, business and commercial real estate lending portfolios and cash management services. The Company originates consumer loans, commercial and multi-family real estate loans, construction loans for residential and multi-family construction, and commercial business loans. At March 31, 2021, the Company’s retail deposit branch network consisted of 21 branches in the Pacific Northwest. This segment is also responsible for the management of the investment portfolio and other assets of the Bank. Home Lending Segment The home lending segment right to service these loans. Loans originated under the guidelines of the Federal Housing Administration or FHA, US Department of Veterans Affairs or VA, and United States Department of Agriculture or USDA are generally sold servicing released to a correspondent bank or mortgage company. The Company has the option to sell loans on a servicing-released or servicing-retained basis to securitizers and correspondent lenders. A small percentage of its loans are brokered to other lenders. On occasion, the Company may sell a portion of its MSR portfolio and may sell small pools of loans initially originated to be held in the loan portfolio. The Company manages the loan funding and the interest rate risk associated with the secondary market loan sales and the retained one-to-four-family mortgage servicing rights within this business segment. One-to-four-family loans originated for investment are allocated to the home lending segment with a corresponding provision expense and FTP for cost of funds. Segment Financial Results The tables below summarize the financial results for each segment based on the factors mentioned above within each segment for the three months ended March 31, 2021 and 2020: At or For the Three Months Ended March 31, 2021 Condensed income statement: Home Lending Commercial and Consumer Banking Total Net interest income (1) $ 1,622 $ 18,478 $ 20,100 Benefit (provision) for loan losses 58 (1,558) (1,500) Noninterest income 10,832 2,202 13,034 Noninterest expense (3,131) (13,218) (16,349) Income before provision for income taxes 9,381 5,904 15,285 Provision for income taxes (2,088) (1,314) (3,402) Net income $ 7,293 $ 4,590 $ 11,883 Total average assets for period ended $ 405,001 $ 1,725,597 $ 2,130,598 FTEs 154 355 509 At or For the Three Months Ended March 31, 2020 Condensed income statement: Home Lending Commercial and Consumer Banking Total Net interest income (1) $ 1,181 $ 16,292 $ 17,473 Provision for loan losses (559) (3,127) (3,686) Noninterest income 5,158 3,733 8,891 Noninterest expense (4,162) (12,022) (16,184) Income before provision for income taxes 1,618 4,876 6,494 Provision for income taxes (331) (996) (1,327) Net income $ 1,287 $ 3,880 $ 5,167 Total average assets for period ended $ 327,441 $ 1,406,594 $ 1,734,035 FTEs 127 317 444 __________________________ (1) Net interest income is the difference between interest earned on assets and the cost of liabilities to fund those assets. Interest earned includes actual interest earned on segment assets and, if the segment has excess liabilities, interest credits for providing funding to the other segment. The cost of liabilities includes interest expense on segment liabilities and, if the segment does not have enough liabilities to fund its assets, a funding charge based on the cost of assigned liabilities to fund segment assets.

Goodwill and other Intangible A

Goodwill and other Intangible Assets	3 Months Ended
Goodwill and other Intangible Assets	Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE 16 - GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and certain other intangibles generally arise from business combinations accounted for under the acquisition method of accounting. Goodwill totaled $2.3 million at March 31, 2021 and December 31, 2020, and represents the excess of the total acquisition price paid over the fair value of the assets acquired, net of the fair values of liabilities assumed as a result of four retail branches purchased from Bank of America, N.A. in 2016 (“Branch Purchase”). Goodwill is not amortized but is evaluated for impairment on an annual basis at December 31 of each year or whenever events or changes in circumstances indicate the carrying value may not be recoverable. The Company performed an impairment analysis at December 31, 2020, and determined that no impairment of goodwill existed. However, if adverse economic conditions or the decrease in the Company’s stock price and market capitalization as a result of the COVID-19 pandemic were to be deemed sustained rather than temporary, it may significantly affect the fair value of our goodwill. Accordingly, no assurances can be given that the Company will not record an impairment loss on goodwill in the future. Core deposit intangible (“CDI”) is evaluated for impairment whenever events or changes in circumstances indicate that its carrying amount may not be recoverable, with any changes in estimated useful life accounted for prospectively over the revised remaining life. As of March 31, 2021, management believes that there have been no events or changes in the circumstances that would indicate a potential impairment of CDI. The following table summarizes the changes in the Company’s other intangible assets comprised solely of CDI for the year ended December 31, 2020, and the three months ended March 31, 2021. Other Intangible Assets Accumulated Gross CDI Amortization Net CDI Balance, December 31, 2019 $ 7,490 $ (2,033) $ 5,457 Amortization — (706) (706) Balance, December 31, 2020 7,490 (2,739) 4,751 Amortization — (177) (177) Balance, March 31, 2021 $ 7,490 $ (2,916) $ 4,574 The CDI represents the fair value of the intangible core deposit base acquired in business combinations. The CDI will be amortized on a straight-line basis over 10 years for the CDI related to the Anchor Acquisition and on an accelerated basis over approximately nine years for the CDI related to the Branch Purchase. Total amortization expense was $177,000 and for the three months ended March 31, 2021, and $176,000 for the same period in 2020. Amortization expense for CDI is expected to be as follows at March 31, 2021: Remainder of 2021 $ 514 2022 691 2023 691 2024 621 2025 525 Thereafter 1,532 Total $ 4,574

Revenue From Contracts With Cus

Revenue From Contracts With Customers	3 Months Ended
Revenue From Contracts With Customers	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customers	NOTE 17 - REVENUE FROM CONTRACTS WITH CUSTOMERS Revenue Recognition In accordance with Topic 606, revenues are recognized when control of promised goods or services is transferred to customers in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of Topic 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the Company satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, once the contract is determined to be within the scope of Topic 606, the Company assesses the goods or services that are promised within each contract and identifies those that contain performance obligations and assesses whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) the performance obligation is satisfied. All the Company’s revenue from contracts with customers in-scope of ASC 606 is recognized in noninterest income and included in our commercial and consumer banking segment. The following table presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three months ended March 31, 2021 and 2020. (Dollars in thousands): At or For the Three Months Ended March 31, Noninterest income 2021 2020 In-scope of Topic 606: Debit card interchange fees $ 515 $ 435 Deposit service and account maintenance fees 173 266 Noninterest income (in-scope of Topic 606) 688 701 Noninterest income (out-of-scope of Topic 606) 12,346 8,190 Total noninterest income $ 13,034 $ 8,891 Deposit Fees The Bank earns fees from its deposit customers for account maintenance, transaction-based services, and overdraft charges. Account maintenance fees consist primarily of account fees and analyzed account fees charged on deposit accounts on a monthly basis. The performance obligation is satisfied and the fees are recognized on a monthly basis as the service period is completed. Transaction-based fees on deposit accounts are charged to deposit customers for specific services provided to the customer, such as wire fees, as well as charges against the account, such as fees for non-sufficient funds and overdrafts. The performance obligation is completed as the transaction occurs and the fees are recognized at the time each specific service is provided to the customer. Debit Interchange Income Debit and ATM interchange income represent fees earned when a debit card issued by the Bank is used. The Bank earns interchange fees from debit cardholder transactions through the Visa payment network. Interchange fees from cardholder transactions represent a percentage of the underlying transaction value and are recognized daily, concurrently with the transaction processing services provided to the cardholder. The performance obligation is satisfied and the fees are earned when the cost of the transaction is charged to the cardholders’ debit card.

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2021
Basis of Presentation and Summary of Significant Accounting Policies
Financial Statement Presentation	Financial Statement Presentation - The results for the three months ended March 31, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021, or any other future period. The preparation of financial statements, in conformity with U.S. GAAP, requires management to make estimates and assumptions that affect amounts reported in the financial statements. Actual results could differ from these estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan and lease losses, fair value of financial instruments, the valuation of servicing rights, deferred income taxes, and if needed, a deferred tax asset valuation allowance. Amounts presented in the consolidated financial statements and footnote tables are rounded and presented to the nearest thousands of dollars except per share amounts. If the amounts are above $1.0 million, they are rounded one decimal point, and if they are above $1.0 billion, they are rounded two decimal points.
Principles of Consolidation	Principles of Consolidation -
Segment Reporting	Segment Reporting -
Subsequent Events	Subsequent Events -
Earnings Per Share	The Company computes earnings per share using the two-class method, which is an earnings allocation method for computing earnings per share that treats a participating security as having rights to earnings that would otherwise have been available to common shareholders. Basic earnings per share are computed by dividing income available to common shareholders by the weighted average number of common shares outstanding for the period. Unvested share-based awards containing non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and are included in the computation of earnings per share pursuant to the two-class method. Diluted earnings per share reflect the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity. For earnings per share calculations, the ESOP shares committed to be released are included as outstanding shares for both basic and diluted earnings per share.
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTS In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, as amended by ASU 2018-19, ASU 2019-10, and ASU 2019-11. financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the approach under CECL. Organizations will continue to use judgment to determine which loss estimation method is appropriate for their circumstances. The ASU requires enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. These disclosures include qualitative and quantitative requirements that provide additional information about the amounts recorded in the financial statements. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The ASU and associated amendments are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. Early adoption will be permitted for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The Company has selected a third-party vendor to assist in the implementation of this ASU and has run parallel computations as it continues to evaluate the impact of adoption of the new standard. As part of the implementation, management is also evaluating economic variables and forecast time horizons it believes to be most relevant based on the composition of the loan portfolio to develop a reasonable and supportable forecast, likely to include forecasted levels of employment, gross domestic product, and home price index, depending on the nature of the loan segment, as well as various loss methodologies to estimate expected credit losses. In addition, management has kept current on evolving interpretations and industry practices related to ASU 2016-13 via webcasts, publications, and conferences. Once adopted, the Company anticipates the allowance for loan losses to potentially change through a one-time adjustment to retained earnings, however, until the evaluation is complete the magnitude of the potential change will be unknown. In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326: Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments In May 2019, the FASB issued ASU 2019-05, Financial Instruments-Credit Losses (Topic 326): Targeted Transition Relief In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform” (“Topic 848”). This ASU provides optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this ASU apply to contract modifications that replace a reference rate affected by reference rate reform (including rates referenced in fallback provisions) and contemporaneous modifications of other contract terms related to the replacement of the reference rate (including contract modifications to add or change fallback provisions). The following optional expedients for applying the requirements of certain Topics or Industry Subtopics in the Codification are permitted for contracts that are modified because of reference rate reform and that meet certain scope guidance: 1) Modifications of contracts within the scope of Topics 310, Receivables, and 470, Debt, should be accounted for by prospectively adjusting the effective interest rate; 2) Modifications of contracts within the scope of Topics 840, Leases, and 842, Leases, should be accounted for as a continuation of the existing contracts with no reassessments of the lease classification and the discount rate (for example, the incremental borrowing rate) or remeasurements of lease payments that otherwise would be required under those Topics for modifications not accounted for as separate contracts; and 3) Modifications of contracts do not require an entity to reassess its original conclusion about whether that contract contains an embedded derivative that is clearly and closely related to the economic characteristics and risks of the host contract under Subtopic 815-15, Derivatives and Hedging— Embedded Derivatives. In January 2021, ASU 2021-01 updated amendments in the new ASU to clarify that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. Amendments in this ASU and the expedients and exceptions in Topic 848 capture the incremental consequences of the scope clarification and tailor the existing guidance to derivative instruments affected by the discounting transition. An entity may elect to apply the amendments in this ASU on a full retrospective basis as of any date from the effective dates. The amendments in this ASU have differing effective dates, beginning with an interim period including and subsequent to March 12, 2020 through December 31, 2022. The Company does not expect the adoption of ASU 2020-04 to have a material impact on its consolidated financial statements.
Recent Events	Recent Events
Application of New Accounting Guidance Adopted in 2021	Application of New Accounting Guidance Adopted in 2021 In October 2020, the FASB issued ASU 2020-08, Codification Improvements to Subtopic 310-20: Receivables – Nonrefundable Fees and Other Costs In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes.
Loan Portfolio Segment	The Company has defined its loan portfolio into three segments that reflect the structure of the lending function, the Company’s strategic plan and the manner in which management monitors performance and credit quality. The three loan portfolio segments are: (a) Real Estate Loans, (b) Consumer Loans, and (c) Commercial Business Loans. Each of these segments is disaggregated into classes based on the risk characteristics of the borrower and/or the collateral type securing the loan. The following is a summary of each of the Company’s loan portfolio segments and classes: Real Estate Loans Commercial Lending Construction and Development Lending Home Equity Lending One-to-Four-Family Real Estate Lending Multi-Family Lending Consumer Loans Indirect Home Improvement Marine Other Consumer. Commercial Business Loans Commercial and Industrial Lending (“C&I”) Warehouse Lending
Credit Quality Indicators	The Company utilizes a risk grading matrix to assign a risk grade to its real estate and commercial business loans. Loans are graded on a scale of 1 to 10, with loans in risk grades 1 to 6 considered “Pass” and loans in risk grades 7 to 10 are reported as classified loans in the Company’s allowance for loan loss analysis. A description of the 10 risk grades is as follows: ● Grades 1 and 2 - These grades include loans to very high-quality borrowers with excellent or desirable business credit. ● Grade 3 - This grade includes loans to borrowers of good business credit with moderate risk. ● Grades 4 and 5 - These grades include “Pass” grade loans to borrowers of average credit quality and risk. ● Grade 6 - This grade includes loans on management’s “Watch” list and is intended to be utilized on a temporary basis for “Pass” grade borrowers where frequent and thorough monitoring is required due to credit weaknesses and where significant risk-modifying action is anticipated in the near term. ● Grade 7 - This grade is for “Other Assets Especially Mentioned” (“OAEM”) in accordance with regulatory guidelines and includes borrowers where performance is poor or significantly less than expected. ● Grade 8 - This grade includes “Substandard” loans in accordance with regulatory guidelines which represent an unacceptable business credit where a loss is possible if loan weakness is not corrected. ● Grade 9 - This grade includes “Doubtful” loans in accordance with regulatory guidelines where a loss is highly probable. ● Grade 10 - This grade includes “Loss” loans in accordance with regulatory guidelines for which total loss is expected and when identified are charged off. Consumer, Home Equity, and One-to-Four-Family Real Estate Loans Homogeneous loans are risk rated based upon the Federal Financial Institutions Examination Council’s Uniform Retail Credit Classification and Account Management Policy. Loans classified under this policy at the Company are consumer loans which include indirect home improvement, solar, marine, other consumer, and one-to-four-family first and second liens. Under the Uniform Retail Credit Classification Policy, loans that are current or less than 90 days past due are graded “Pass” and risk rated “4” or “5” internally. Loans that are past due more than 90 days are classified “Substandard” and risk graded “8” internally until the loan has demonstrated consistent performance, typically six months of contractual payments. Closed-end loans that are 120 days past due and open-end loans that are 180 days past due are charged off based on the value of the collateral less cost to sell. Management may more conservatively risk rate credits even if paying in accordance with the loan’s repayment terms. Commercial real estate, construction and development, multi-family and commercial business loans are evaluated individually for their risk classification and may be classified as “Substandard” even if current on their loan payment obligations.
Determination of Fair Market Values	The following methods were used to estimate the fair value of certain assets and liabilities on a recurring and nonrecurring basis: Securities - Mortgage Loans Held for Sale - Derivative Instruments - Impaired Loans Other Real Estate Owned Servicing Rights -
Nonaccrual and Past Due Loans	Nonaccrual and Past Due Loans As a result of the COVID-19 pandemic, the Company has and will continue to assist customers with an array of payment programs during periods of financial hardship, including forbearance. Forbearance allows a borrower to temporarily not make scheduled payments or to make smaller than scheduled payments, in each case for a specified period of time. Forbearance does not grant any reduction in the total principal or interest repayment obligation. While a loan is in forbearance status, interest continues to accrue and is repaid over a specified time period when the loan re-enters repayment status.
Loan Commitments	The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments.

Investments (Tables)

Investments (Tables)	3 Months Ended
Investments (Tables)	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of Available-for-sale Securities Reconciliation	March 31, 2021 Estimated Amortized Unrealized Unrealized Fair SECURITIES AVAILABLE-FOR-SALE Cost Gains Losses Values U.S. agency securities $ 7,936 $ 164 $ (272) $ 7,828 Corporate securities 11,896 51 (402) 11,545 Municipal bonds 96,594 1,960 (905) 97,649 Mortgage-backed securities 66,104 1,562 (265) 67,401 U.S. Small Business Administration securities 16,509 379 — 16,888 Total securities available-for-sale 199,039 4,116 (1,844) 201,311 SECURITIES HELD-TO-MATURITY Corporate securities 7,500 373 — 7,873 Total securities held-to-maturity 7,500 373 — 7,873 Total securities $ 206,539 $ 4,489 $ (1,844) $ 209,184 December 31, 2020 Estimated Amortized Unrealized Unrealized Fair SECURITIES AVAILABLE-FOR-SALE Cost Gains Losses Values U.S. agency securities $ 7,940 $ 166 $ (1) $ 8,105 Corporate securities 11,885 54 (939) 11,000 Municipal bonds 69,572 2,435 (150) 71,857 Mortgage-backed securities 65,722 2,541 (76) 68,187 U.S. Small Business Administration securities 18,441 443 (15) 18,869 Total securities available-for-sale 173,560 5,639 (1,181) 178,018 SECURITIES HELD-TO-MATURITY Corporate securities 7,500 77 (21) 7,556 Total securities held-to-maturity 7,500 77 (21) 7,556 Total securities $ 181,060 $ 5,716 $ (1,202) $ 185,574
Schedule of Unrealized Loss on Investments	March 31, 2021 Less than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized SECURITIES AVAILABLE-FOR-SALE Value Losses Value Losses Value Losses U.S. agency securities $ 3,691 $ (272) $ — $ — $ 3,691 $ (272) Corporate securities 6,596 (402) — — 6,596 (402) Municipal bonds 31,881 (905) — — 31,881 (905) Mortgage-backed securities 18,451 (256) 2,990 (9) 21,441 (265) Total securities available-for-sale $ 60,619 $ (1,835) $ 2,990 $ (9) $ 63,609 $ (1,844) December 31, 2020 Less than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized SECURITIES AVAILABLE-FOR-SALE Value Losses Value Losses Value Losses U.S. agency securities $ 1,986 $ (1) $ — $ — $ 1,986 $ (1) Corporate securities 7,059 (939) — — 7,059 (939) Municipal bonds 8,377 (150) — — 8,377 (150) Mortgage-backed securities 6,903 (65) 3,002 (11) 9,905 (76) U.S. Small Business Administration securities 2,314 (15) — — 2,314 (15) Total securities available-for-sale 26,639 (1,170) 3,002 (11) 29,641 (1,181) SECURITIES HELD-TO-MATURITY Corporate securities 4,979 (21) — — 4,979 (21) Total securities held-to-maturity 4,979 (21) — — 4,979 (21) Total $ 31,618 $ (1,191) $ 3,002 $ (11) $ 34,620 $ (1,202)
Schedule of Available for Sale Securities by Contractual Maturity	March 31, 2021 December 31, 2020 SECURITIES AVAILABLE-FOR-SALE Amortized Fair Amortized Fair U.S. agency securities Cost Value Cost Value Due after one year through five years $ 973 $ 1,045 $ 978 $ 1,060 Due after five years through ten years 1,000 1,032 1,000 1,036 Due after ten years 5,963 5,751 5,962 6,009 Subtotal 7,936 7,828 7,940 8,105 Corporate securities Due in one year or less 2,403 2,430 2,392 2,433 Due after one year through five years 3,493 3,505 3,493 3,491 Due after five years through ten years 4,000 3,790 4,000 3,676 Due after ten years 2,000 1,820 2,000 1,400 Subtotal 11,896 11,545 11,885 11,000 Municipal bonds Due in one year or less 100 100 101 101 Due after one year through five years 3,743 3,939 3,749 3,980 Due after five years through ten years 7,951 8,254 7,994 8,321 Due after ten years 84,800 85,356 57,728 59,455 Subtotal 96,594 97,649 69,572 71,857 Mortgage-backed securities Federal National Mortgage Association (“FNMA”) 49,693 50,894 47,675 50,005 Federal Home Loan Mortgage Corporation (“FHLMC”) 11,189 11,204 11,825 11,913 Government National Mortgage Association (“GNMA”) 5,222 5,303 6,222 6,269 Subtotal 66,104 67,401 65,722 68,187 U.S. Small Business Administration securities Due after one year through five years 3,470 3,554 2,266 2,353 Due after five years through ten years 5,192 5,355 8,097 8,333 Due after ten years 7,847 7,979 8,078 8,183 Subtotal 16,509 16,888 18,441 18,869 Total securities available-for-sale 199,039 201,311 173,560 178,018 SECURITIES HELD-TO-MATURITY Corporate securities Due after five years through ten years 7,500 7,873 7,500 7,556 Total securities held-to-maturity 7,500 7,873 7,500 7,556 Total securities $ 206,539 $ 209,184 $ 181,060 $ 185,574

Loans Receivable and Allowanc_2

Loans Receivable and Allowance For Loan Losses (Tables)	3 Months Ended
Loans Receivable and Allowance For Loan Losses (Tables)	Mar. 31, 2021
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	March 31, December 31, REAL ESTATE LOANS 2021 2020 Commercial $ 226,799 $ 222,719 Construction and development 241,677 216,975 Home equity 41,352 43,093 One-to-four-family (excludes loans held for sale) 299,316 311,093 Multi-family 122,623 131,601 Total real estate loans 931,767 925,481 CONSUMER LOANS Indirect home improvement 294,455 286,020 Marine 85,275 85,740 Other consumer 3,119 3,418 Total consumer loans 382,849 375,178 COMMERCIAL BUSINESS LOANS Commercial and industrial 261,932 224,476 Warehouse lending 48,537 49,092 Total commercial business loans 310,469 273,568 Total loans receivable, gross 1,625,085 1,574,227 Allowance for loan losses (27,375) (26,172) Deferred costs and fees, net (5,278) (4,017) Premiums on purchased loans, net 628 943 Total loans receivable, net $ 1,593,060 $ 1,544,981
Allowance for Credit Losses on Financing Receivables	At or For the Three Months Ended March 31, 2021 Commercial ALLOWANCE FOR LOAN LOSSES Real Estate Consumer Business Unallocated Total Beginning balance $ 13,846 $ 6,696 $ 4,939 $ 691 $ 26,172 (Recapture) provision for loan losses (231) 378 768 585 1,500 Charge-offs — (503) (38) — (541) Recoveries — 244 — — 244 Net charge-offs — (259) (38) — (297) Ending balance $ 13,615 $ 6,815 $ 5,669 $ 1,276 $ 27,375 Period end amount allocated to: Loans individually evaluated for impairment $ 15 $ 241 $ 1,169 $ — $ 1,425 Loans collectively evaluated for impairment 13,600 6,574 4,500 1,276 25,950 Ending balance $ 13,615 $ 6,815 $ 5,669 $ 1,276 $ 27,375 LOANS RECEIVABLE Loans individually evaluated for impairment $ 2,896 $ 689 $ 5,691 $ — $ 9,276 Loans collectively evaluated for impairment 928,871 382,160 304,778 — 1,615,809 Ending balance $ 931,767 $ 382,849 $ 310,469 $ — $ 1,625,085 At or For the Three Months Ended March 31, 2020 Commercial ALLOWANCE FOR LOAN LOSSES Real Estate Consumer Business Unallocated Total Beginning balance $ 6,206 $ 3,766 $ 3,254 $ 3 $ 13,229 Provision for loan losses 1,019 660 824 1,183 3,686 Charge-offs — (370) (11) — (381) Recoveries 18 143 177 — 338 Net recoveries (charge-offs) 18 (227) 166 — (43) Ending balance $ 7,243 $ 4,199 $ 4,244 $ 1,186 $ 16,872 Period end amount allocated to: Loans individually evaluated for impairment $ 15 $ 231 $ — $ — $ 246 Loans collectively evaluated for impairment 7,228 3,968 4,244 1,186 16,626 Ending balance $ 7,243 $ 4,199 $ 4,244 $ 1,186 $ 16,872 LOANS RECEIVABLE Loans individually evaluated for impairment $ 2,528 $ 664 $ — $ — $ 3,192 Loans collectively evaluated for impairment 860,148 334,431 214,103 — 1,408,682 Ending balance $ 862,676 $ 335,095 $ 214,103 $ — $ 1,411,874
Past Due Financing Receivables	March 31, 2021 30-59 60-89 Days Days 90 Days Total Total Past Past or More Past Loans Non- REAL ESTATE LOANS Due Due Past Due Due Current Receivable Accrual Commercial $ — $ — $ — $ — $ 226,799 $ 226,799 $ — Construction and development 509 — 1,850 2,359 239,318 241,677 1,850 Home equity 66 108 414 588 40,764 41,352 522 One-to-four-family 1,651 218 524 2,393 296,923 299,316 524 Multi-family — — — — 122,623 122,623 — Total real estate loans 2,226 326 2,788 5,340 926,427 931,767 2,896 CONSUMER LOANS Indirect home improvement 457 340 174 971 293,484 294,455 626 Marine 67 30 — 97 85,178 85,275 56 Other consumer 42 9 6 57 3,062 3,119 7 Total consumer loans 566 379 180 1,125 381,724 382,849 689 COMMERCIAL BUSINESS LOANS Commercial and industrial — — 1,204 1,204 260,728 261,932 5,691 Warehouse lending — — — — 48,537 48,537 — Total commercial business loans — — 1,204 1,204 309,265 310,469 5,691 Total loans $ 2,792 $ 705 $ 4,172 $ 7,669 $ 1,617,416 $ 1,625,085 $ 9,276 December 31, 2020 30-59 60-89 Days Days 90 Days Total Total Past Past or More Past Loans Non- REAL ESTATE LOANS Due Due Past Due Due Current Receivable Accrual Commercial $ — $ — $ — $ — $ 222,719 $ 222,719 $ — Construction and development 1,850 — — 1,850 215,125 216,975 — Home equity 127 137 219 483 42,610 43,093 636 One-to-four-family 389 404 512 1,305 309,788 311,093 644 Multi-family — — — — 131,601 131,601 — Total real estate loans 2,366 541 731 3,638 921,843 925,481 1,280 CONSUMER LOANS Indirect home improvement 683 331 325 1,339 284,681 286,020 826 Marine 28 77 22 127 85,613 85,740 44 Other consumer 73 22 — 95 3,323 3,418 1 Total consumer loans 784 430 347 1,561 373,617 375,178 871 COMMERCIAL BUSINESS LOANS Commercial and industrial — 1,204 — 1,204 223,272 224,476 5,610 Warehouse lending — — — — 49,092 49,092 — Total commercial business loans — 1,204 — 1,204 272,364 273,568 5,610 Total loans $ 3,150 $ 2,175 $ 1,078 $ 6,403 $ 1,567,824 $ 1,574,227 $ 7,761
Impaired Financing Receivables	March 31, 2021 Unpaid WITH NO RELATED ALLOWANCE RECORDED Principal Recorded Related Real estate loans: Balance Investment Allowance Construction and development $ 1,850 $ 1,850 $ — Home equity 578 522 — One-to-four-family 513 464 — 2,941 2,836 — WITH RELATED ALLOWANCE RECORDED Real estate loans: One-to-four-family 61 60 15 Consumer loans: Indirect 626 626 219 Marine 56 56 20 Other consumer 7 7 2 Commercial business loans: Commercial and industrial 5,691 5,691 1,169 6,441 6,440 1,425 Total $ 9,382 $ 9,276 $ 1,425 December 31, 2020 Unpaid WITH NO RELATED ALLOWANCE RECORDED Principal Recorded Related Real estate loans: Balance Investment Allowance Home equity 687 636 — One-to-four-family 645 584 — Commercial business loans: Commercial and industrial 1,203 1,203 — 2,535 2,423 — WITH RELATED ALLOWANCE RECORDED Real estate loans: One-to-four-family 61 60 15 Consumer loans: Indirect 826 826 289 Marine 44 44 15 Other consumer 1 1 1 Commercial business loans: Commercial and industrial 4,407 4,407 990 5,339 5,338 1,310 Total $ 7,874 $ 7,761 $ 1,310 At or For the Three Months Ended March 31, 2021 March 31, 2020 WITH NO RELATED ALLOWANCE RECORDED Average Recorded Interest Income Average Recorded Interest Income Real estate loans: Investment Recognized Investment Recognized Commercial $ — $ — $ 1,084 $ 8 Construction and development 1,850 — — — Home equity 652 2 220 — One-to-four-family 543 2 1,230 5 Consumer loans: Other consumer — — 5 — 3,045 4 2,539 13 WITH AN ALLOWANCE RECORDED Real estate loans: One-to-four-family 60 — 60 — Consumer loans: Indirect 786 14 548 13 Marine 36 1 41 — Other consumer 3 — 1 — Commercial business loans: Commercial and industrial 5,678 — — — 6,563 15 650 13 Total $ 9,608 $ 19 $ 3,189 $ 26
Financing Receivable Credit Quality Indicators	March 31, 2021 Special Pass Watch Mention Substandard Doubtful Loss REAL ESTATE LOANS (1 - 5) (6) (7) (8) (9) (10) Total Commercial $ 169,396 $ 53,627 $ 2,842 $ 934 $ — $ — $ 226,799 Construction and development 239,827 — — 1,850 — — 241,677 Home equity 40,830 — — 522 — — 41,352 One-to-four-family 292,142 — 186 6,988 — — 299,316 Multi-family 122,623 — — — — — 122,623 Total real estate loans 864,818 53,627 3,028 10,294 — — 931,767 CONSUMER LOANS Indirect home improvement 293,829 — — 626 — — 294,455 Marine 85,219 — — 56 — — 85,275 Other consumer 3,112 — — 7 — — 3,119 Total consumer loans 382,160 — — 689 — — 382,849 COMMERCIAL BUSINESS LOANS Commercial and industrial 232,615 14,631 4,773 9,913 — — 261,932 Warehouse lending 48,537 — — — — — 48,537 Total commercial business loans 281,152 14,631 4,773 9,913 — — 310,469 Total loans receivable, gross $ 1,528,130 $ 68,258 $ 7,801 $ 20,896 $ — $ — $ 1,625,085 December 31, 2020 Special Pass Watch Mention Substandard Doubtful Loss REAL ESTATE LOANS (1 - 5) (6) (7) (8) (9) (10) Total Commercial $ 157,932 $ 60,834 $ 3,013 $ 940 $ — $ — $ 222,719 Construction and development 212,209 2,917 1,849 — — — 216,975 Home equity 42,457 — — 636 — — 43,093 One-to-four-family 303,610 162 187 7,134 — — 311,093 Multi-family 131,601 — — — — — 131,601 Total real estate loans 847,809 63,913 5,049 8,710 — — 925,481 CONSUMER LOANS Indirect home improvement 285,194 — — 826 — — 286,020 Marine 85,696 — — 44 — — 85,740 Other consumer 3,417 — — 1 — — 3,418 Total consumer loans 374,307 — — 871 — — 375,178 COMMERCIAL BUSINESS LOANS Commercial and industrial 190,392 23,945 2,073 8,066 — — 224,476 Warehouse lending 49,092 — — — — — 49,092 Total commercial business loans 239,484 23,945 2,073 8,066 — — 273,568 Total loans receivable, gross $ 1,461,600 $ 87,858 $ 7,122 $ 17,647 $ — $ — $ 1,574,227

Servicing Rights (Tables)

Servicing Rights (Tables)	3 Months Ended
Servicing Rights (Tables)	Mar. 31, 2021
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Summary of servicing rights activity	At or For the Three Months Ended March 31, 2021 2020 Beginning balance $ 12,595 $ 11,560 Additions 3,144 1,185 Servicing rights amortized (2,054) (1,605) Recovery (impairment) of servicing rights 2,050 (514) Ending balance $ 15,735 $ 10,626
Key economic assumptions and the sensitivity of the current fair value for single family mortgage servicing rights	March 31, 2021 December 31, 2020 (1) Aggregate portfolio principal balance $ 2,335,329 $ 2,133,473 Weighted average rate of note 3.3 % 3.5 % At March 31, 2021 Base 0.5% Adverse Rate Change 1.0% Adverse Rate Change Conditional prepayment rate 14.7 % 19.6 % 27.0 % Fair value MSR $ 23,256 $ 19,979 $ 16,157 Percentage of MSR 1.0 % 0.9 % 0.7 % Discount rate 9.1 % 9.6 % 10.1 % Fair value MSR $ 23,256 $ 22,820 $ 22,400 Percentage of MSR 1.0 % 1.0 % 1.0 % At December 31, 2020 Base 0.5% Adverse Rate Change 1.0% Adverse Rate Change Conditional prepayment rate 32.6 % 40.6 % 59.6 % Fair value MSR $ 12,833 $ 10,922 $ 8,286 Percentage of MSR 0.6 % 0.5 % 0.4 % Discount rate 9.1 % 9.6 % 10.1 % Fair value MSR $ 12,833 $ 12,696 $ 12,562 Percentage of MSR 0.6 % 0.6 % 0.6 %
Mortgage servicing rights
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation assumptions	At March 31, At December 31, Key assumptions: 2021 2020 Weighted average discount rate 9.1 % 9.1 % Conditional prepayment rate (“CPR”) 14.7 % 32.6 % Weighted average life in years 5.9 3.0

Derivatives (Tables)

Derivatives (Tables)	3 Months Ended
Derivatives (Tables)	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	March 31, 2021 Fair Value Cash flow hedges: Notional Asset Liability Interest rate swaps $ 90,000 $ 650 $ 731 Non-hedging derivatives: Fallout adjusted interest rate lock commitments with customers 129,059 1,985 — Mandatory and best effort forward commitments with investors 47,433 506 — Forward TBA mortgage-backed securities 213,000 3,232 — December 31, 2020 Fair Value Cash flow hedges: Notional Asset Liability Interest rate swaps $ 90,000 $ 21 $ 1,252 Non-hedging derivatives: Fallout adjusted interest rate lock commitments with customers 136,739 4,024 — Mandatory and best effort forward commitments with investors 25,027 — 67 Forward TBA mortgage-backed securities 232,000 — 1,602

Leases (Tables)

Leases (Tables)	3 Months Ended
Leases (Tables)	Mar. 31, 2021
Leases [Abstract]
Summary of lease cost	Three Months Ended Three Months Ended Lease cost: March 31, 2021 March 31, 2020 Operating lease cost $ 348 $ 343 Short-term lease cost 1 8 Total lease cost $ 349 $ 351
Supplemental information related to operating leases	At or For the At or For the Cash paid for amounts included in the Three Months Ended Three Months Ended measurement of lease liabilities: March 31, 2021 March 31, 2020 Operating cash flows from operating leases $ 349 $ 336 Weighted average remaining lease term- operating leases 5.1 years 5.2 years Weighted average discount rate- operating leases 2.33 % 2.97 %
Summary of maturities of operating lease liabilities	Remainder of 2021 $ 1,026 2022 1,336 2023 954 2024 882 2025 530 Thereafter 949 Total lease payments 5,677 Less imputed interest (392) Total $ 5,285

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	3 Months Ended
Other Real Estate Owned (Tables)	Mar. 31, 2021
Banking and Thrift [Abstract]
Schedule of Other Real Estate Owned	At or For the Three Months Ended March 31, 2021 2020 Beginning balance $ 90 $ 168 Additions — — Gross proceeds from sale of OREO (81) (76) Loss on sale of OREO (9) (2) Ending balance $ — $ 90

Deposits (Tables)

Deposits (Tables)	3 Months Ended
Deposits (Tables)	Mar. 31, 2021
Banking and Thrift [Abstract]
Schedule of Deposit Liabilities	March 31, December 31, 2021 2020 Noninterest-bearing checking $ 390,855 $ 348,421 Interest-bearing checking 250,907 226,282 Savings 161,140 152,842 Money market 468,753 429,548 Certificates of deposit less than $100,000 285,505 299,157 Certificates of deposit of $100,000 through $250,000 133,570 135,901 Certificates of deposit of $250,000 and over 66,528 67,488 Escrow accounts related to mortgages serviced 23,535 14,432 Total $ 1,780,793 $ 1,674,071
Schedule of Maturities of Time Deposits for Future Periods	At March 31, 2021 Maturing in 2021 $ 282,288 Maturing in 2022 119,901 Maturing in 2023 21,159 Maturing in 2024 24,156 Maturing in 2025 35,926 Thereafter 2,173 Total $ 485,603
Schedule of Interest Expense by Deposit Category	Three Months Ended March 31, 2021 2020 Interest-bearing checking $ 50 $ 136 Savings and money market 468 826 Certificates of deposit 1,464 2,845 Total $ 1,982 $ 3,807

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
Commitments and Contingencies (Tables)	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of Commitments to Extend Credit	COMMITMENTS TO EXTEND CREDIT March 31, December 31, REAL ESTATE LOANS 2021 2020 Commercial $ 1,267 $ 1,293 Construction and development 128,095 143,666 One-to-four-family (includes locks for saleable loans) 146,466 147,712 Home equity 53,279 52,457 Multi-family 652 658 Total real estate loans 329,759 345,786 CONSUMER LOANS 23,279 23,365 COMMERCIAL BUSINESS LOANS Commercial and industrial 106,959 106,171 Warehouse lending 51,963 52,909 Total commercial business loans 158,922 159,080 Total commitments to extend credit $ 511,960 $ 528,231

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
Fair Value Measurements (Tables)	Mar. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Schedule of assets and liabilities measured at fair value on a recurring basis	Financial Assets At March 31, 2021 Securities available-for-sale: Level 1 Level 2 Level 3 Total U.S. agency securities $ — $ 7,828 $ — $ 7,828 Corporate securities — 10,560 985 11,545 Municipal bonds — 97,505 144 97,649 Mortgage-backed securities — 67,401 — 67,401 U.S. Small Business Administration securities — 16,888 — 16,888 Mortgage loans held for sale, at fair value — 156,281 — 156,281 Derivatives: Mandatory and best effort forward commitments with investors — — 506 506 Forward TBA mortgage-backed securities — 3,232 — 3,232 Interest rate swaps — 650 — 650 Interest rate lock commitments with customers — — 1,985 1,985 Total assets measured at fair value $ — $ 360,345 $ 3,620 $ 363,965 Financial Liabilities Derivatives: Interest rate swaps $ — $ (731) $ — $ (731) Total liabilities measured at fair value $ — $ (731) $ — $ (731) Financial Assets At December 31, 2020 Securities available-for-sale: Level 1 Level 2 Level 3 Total U.S. agency securities $ — $ 8,105 $ — $ 8,105 Corporate securities — 10,016 984 11,000 Municipal bonds — 71,730 127 71,857 Mortgage-backed securities — 68,187 — 68,187 U.S. Small Business Administration securities — 18,869 — 18,869 Mortgage loans held for sale, at fair value — 166,448 — 166,448 Derivatives: Interest rate swaps — 21 — 21 Interest rate lock commitments with customers — — 4,024 4,024 Total assets measured at fair value $ — $ 343,376 $ 5,135 $ 348,511 Financial Liabilities Derivatives: Mandatory and best effort forward commitments with investors $ — $ — $ (67) $ (67) Forward TBA mortgage-backed securities — (1,602) — (1,602) Interest rate swaps — (1,252) — (1,252) Total liabilities measured at fair value $ — $ (2,854) $ (67) $ (2,921)
Schedule of Valuation Allowance for Impairment of Recognized Servicing Assets	March 31, 2021 Level 1 Level 2 Level 3 Total Impaired loans $ — $ — $ 9,276 $ 9,276 Servicing rights — — 23,256 23,256 December 31, 2020 Level 1 Level 2 Level 3 Total Impaired loans $ — $ — $ 7,761 $ 7,761 OREO — — 90 90 Servicing rights — — 12,833 12,833
Fair value reconciliation - Level 3 on recurring basis	Purchases Net change in Net change in Three Months Ended Beginning and Sales and Ending fair value for fair value for March 31, 2021 Balance Issuances Settlements Balance gains/(losses) (1) gains/(losses) (2) Interest rate lock commitments with customers $ 4,024 $ 7,691 $ (9,730) $ 1,985 $ (2,039) $ — Individual forward sale commitments with investors (67) 654 (81) 506 573 — Securities available-for-sale, at fair value 1,111 21 (3) 1,129 — 21 March 31, 2020 Interest rate lock commitments with customers $ 557 $ 7,411 $ (3,677) $ 4,291 $ 3,734 $ — Individual forward sale commitments with investors (195) (531) 545 (181) 14 — Securities available-for-sale, at fair value 1,162 12 (3) 1,171 — 12 _______________________________ (1) Relating to items held at end of period included in income. (2) Relating to items held at end of period included in other comprehensive income.
Fair Value, by Balance Sheet Grouping	March 31, December 31, 2021 2020 Financial Assets Carrying Fair Carrying Fair Level 1 inputs: Amount Value Amount Value Cash and cash equivalents $ 85,446 $ 85,446 $ 91,576 $ 91,576 Certificates of deposit at other financial institutions 12,278 12,278 12,278 12,278 Level 2 inputs: Securities available-for-sale, at fair value 200,182 200,182 176,907 176,907 Securities held-to-maturity 7,500 7,873 7,500 7,556 Loans held for sale, at fair value 156,281 156,281 166,448 166,448 FHLB stock, at cost 6,475 6,475 7,439 7,439 Forward TBA mortgage-backed securities 3,232 3,232 — — Interest rate swaps 650 650 21 21 Accrued interest receivable 7,429 7,429 7,030 7,030 Level 3 inputs: Securities available-for-sale, at fair value 1,129 1,129 1,111 1,111 Loans receivable, gross 1,625,085 1,656,583 1,574,227 1,580,360 Servicing rights, held at lower of cost or fair value 15,735 23,256 12,595 12,833 Fair value interest rate locks with customers 1,985 1,985 4,024 4,024 Mandatory and best effort forward commitments with investors 506 506 — — Financial Liabilities Level 2 inputs: Deposits 1,780,793 1,778,529 1,674,071 1,674,328 Borrowings 72,528 74,000 165,809 167,680 Subordinated notes 49,344 50,500 10,000 11,083 Accrued interest payable 367 367 406 406 Interest rate swaps 731 731 1,252 1,252 Forward TBA mortgage-backed securities — — 1,602 1,602 Level 3 inputs: Mandatory and best effort forward commitments with investors — — 67 67
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation assumptions	Level 3 Significant Weighted Average Fair Value Valuation Unobservable March 31, December 31, Instruments Techniques Inputs Range 2021 2020 RECURRING Interest rate lock commitments with customers Quoted market prices Pull-through expectations 80% - 99% 93.0 % 91.6 % Individual forward sale commitments with investors Quoted market prices Pull-through expectations 80% - 99% 93.0 % 91.6 % Corporate securities Discounted cash flows Discount rate 2.5% 2.5 % 2.5 % Municipal bonds Discounted cash flows Discount rate 6.4% 6.4 % 6.4 % NONRECURRING Impaired loans Fair value of underlying collateral Discount applied to the obtained appraisal 10.0% 10.0 % 10.0 % OREO Fair value of collateral Discount applied to the obtained appraisal 10.0% N/A 10.0 % Servicing rights Industry sources Pre-payment speeds 0% - 50% 14.7 % 32.6 %

Employee Benefits (Tables)

Employee Benefits (Tables)	3 Months Ended
Employee Benefits (Tables)	Mar. 31, 2021
Compensation and Retirement Disclosure [Abstract]
Schedule of Shares Under ESOP	Balances Balances at March 31, 2021 at March 31, 2020 Allocated shares 213,744 189,511 Committed to be released shares 6,480 6,480 Unallocated shares 19,441 45,362 Total ESOP shares 239,665 241,353 Fair value of unallocated shares (in thousands) $ 1,205 $ 2,276

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
Earnings Per Share (Tables)	Mar. 31, 2021
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	At or For the Three Months Ended March 31, Numerator (in thousands): 2021 2020 Net income $ 11,883 $ 5,167 Dividends and undistributed earnings allocated to participating securities (170) (56) Net income available to common shareholders $ 11,713 $ 5,111 Denominator (shown as actual): Basic weighted average common shares outstanding 4,215,376 4,391,499 Dilutive shares 123,708 87,419 Diluted weighted average common shares outstanding 4,339,084 4,478,918 Basic earnings per share $ 2.78 $ 1.16 Diluted earnings per share $ 2.70 $ 1.14 Potentially dilutive weighted average share options that were not included in the computation of diluted earnings per share because to do so would be anti-dilutive 5,294 41,627

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
Stock-Based Compensation (Tables)	Mar. 31, 2021
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Awards	Weighted-Average Weighted- Remaining Average Contractual Term In Aggregate Shares Exercise Price Years Intrinsic Value Outstanding at January 1, 2021 335,877 $ 38.90 6.58 $ 5,721,159 Granted — — — — Less exercised 2,500 $ 16.89 — $ 96,175 Forfeited or expired — — — — Outstanding at March 31, 2021 333,377 $ 39.06 6.36 $ 9,380,259 Expected to vest, assuming a 0.31% annual forfeiture rate (1) 332,448 $ 39.04 6.36 $ 9,362,972 Exercisable at March 31, 2021 172,488 $ 28.79 4.47 $ 6,625,647 __________________________ (1) Forfeiture rate has been calculated and estimated to assume a forfeiture of 3.1% of the options forfeited over 10 years.
Summary of Nonvested Awards	Weighted-Average Grant-Date Fair Value Nonvested Shares Shares Per Share Nonvested at January 1, 2021 55,092 $ 48.70 Granted — — Less vested — — Forfeited or expired — — Nonvested at March 31, 2021 55,092 $ 48.70

Business Segments (Tables)

Business Segments (Tables)	3 Months Ended
Business Segments (Tables)	Mar. 31, 2021
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	At or For the Three Months Ended March 31, 2021 Condensed income statement: Home Lending Commercial and Consumer Banking Total Net interest income (1) $ 1,622 $ 18,478 $ 20,100 Benefit (provision) for loan losses 58 (1,558) (1,500) Noninterest income 10,832 2,202 13,034 Noninterest expense (3,131) (13,218) (16,349) Income before provision for income taxes 9,381 5,904 15,285 Provision for income taxes (2,088) (1,314) (3,402) Net income $ 7,293 $ 4,590 $ 11,883 Total average assets for period ended $ 405,001 $ 1,725,597 $ 2,130,598 FTEs 154 355 509 At or For the Three Months Ended March 31, 2020 Condensed income statement: Home Lending Commercial and Consumer Banking Total Net interest income (1) $ 1,181 $ 16,292 $ 17,473 Provision for loan losses (559) (3,127) (3,686) Noninterest income 5,158 3,733 8,891 Noninterest expense (4,162) (12,022) (16,184) Income before provision for income taxes 1,618 4,876 6,494 Provision for income taxes (331) (996) (1,327) Net income $ 1,287 $ 3,880 $ 5,167 Total average assets for period ended $ 327,441 $ 1,406,594 $ 1,734,035 FTEs 127 317 444 __________________________ (1) Net interest income is the difference between interest earned on assets and the cost of liabilities to fund those assets. Interest earned includes actual interest earned on segment assets and, if the segment has excess liabilities, interest credits for providing funding to the other segment. The cost of liabilities includes interest expense on segment liabilities and, if the segment does not have enough liabilities to fund its assets, a funding charge based on the cost of assigned liabilities to fund segment assets.

Goodwill and other Intangible_2

Goodwill and other Intangible Assets (Tables)	3 Months Ended
Goodwill and other Intangible Assets (Tables)	Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of changes in other intangible assets	Other Intangible Assets Accumulated Gross CDI Amortization Net CDI Balance, December 31, 2019 $ 7,490 $ (2,033) $ 5,457 Amortization — (706) (706) Balance, December 31, 2020 7,490 (2,739) 4,751 Amortization — (177) (177) Balance, March 31, 2021 $ 7,490 $ (2,916) $ 4,574
Schedule of Amortization Expense	Remainder of 2021 $ 514 2022 691 2023 691 2024 621 2025 525 Thereafter 1,532 Total $ 4,574

Revenue From Contracts With C_2

Revenue From Contracts With Customers (Tables)	3 Months Ended
Revenue From Contracts With Customers (Tables)	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Schedule of noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606	(Dollars in thousands): At or For the Three Months Ended March 31, Noninterest income 2021 2020 In-scope of Topic 606: Debit card interchange fees $ 515 $ 435 Deposit service and account maintenance fees 173 266 Noninterest income (in-scope of Topic 606) 688 701 Noninterest income (out-of-scope of Topic 606) 12,346 8,190 Total noninterest income $ 13,034 $ 8,891

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies (Details)	3 Months Ended
	Mar. 31, 2021itemOfficesegment
Schedule of Accounting Policies [Line Items]
Number of operating segments \| segment	2
Puget Sound [Member]
Schedule of Accounting Policies [Line Items]
Number of bank branches	21
Number of administrative offices that accept deposits \| Office	1
Number of loan production offices	9
Tri-Cities, Washington [Member]
Schedule of Accounting Policies [Line Items]
Number of loan production offices	1

Investments - Available-for-sal

Investments - Available-for-sale securities reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	$ 199,039	$ 173,560
Unrealized gains	4,116	5,639
Unrealized losses	(1,844)	(1,181)
Securities available-for-sale, at fair value	201,311	178,018
SECURITIES HELD-TO-MATURITY
Amortized cost	7,500	7,500
Unrealized gains	373	77
Unrealized losses		(21)
Securities held-to-maturity, at fair value	7,873	7,556
Total securities
Amortized cost	206,539	181,060
Unrealized gains	4,489	5,716
Unrealized losses	(1,844)	(1,202)
Total securities, at fair value	209,184	185,574
U.S. agency securities
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	7,936	7,940
Unrealized gains	164	166
Unrealized losses	(272)	(1)
Securities available-for-sale, at fair value	7,828	8,105
Corporate securities
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	11,896	11,885
Unrealized gains	51	54
Unrealized losses	(402)	(939)
Securities available-for-sale, at fair value	11,545	11,000
SECURITIES HELD-TO-MATURITY
Amortized cost	7,500	7,500
Unrealized gains	373	77
Unrealized losses		(21)
Securities held-to-maturity, at fair value	7,873	7,556
Municipal bonds
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	96,594	69,572
Unrealized gains	1,960	2,435
Unrealized losses	(905)	(150)
Securities available-for-sale, at fair value	97,649	71,857
Mortgage-backed securities
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	66,104	65,722
Unrealized gains	1,562	2,541
Unrealized losses	(265)	(76)
Securities available-for-sale, at fair value	67,401	68,187
U.S. Small Business Administration securities
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	16,509	18,441
Unrealized gains	379	443
Unrealized losses		(15)
Securities available-for-sale, at fair value	$ 16,888	$ 18,869

Investments - Narrative (Detail

Investments - Narrative (Details)	3 Months Ended	12 Months Ended
Investments - Narrative (Details)	Mar. 31, 2021USD ($)security	Dec. 31, 2020USD ($)security
Investments, Debt and Equity Securities [Abstract]
Investments with unrealized losses of less than one year \| security	40	21
Investments with unrealized losses of more than one year \| security	1	1
Number of securities pledged and held at FHLB \| security	7	7
Pledged securities for FHLB	$ 8,500,000	$ 8,800,000
Public deposits	14,300,000	13,200,000
Collateral requirement	5,700,000	5,300,000
Other than temporary impairment losses, investments	$ 0	$ 0

Investments - Investments with

Investments - Investments with Unrealized Losses Policy (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, Less than 12 Months	$ 60,619	$ 26,639
Securities available-for-sale, Unrealized loss position, Fair Value, 12 Months or Longer	2,990	3,002
Securities available-for-sale, Unrealized loss position, Fair Value	63,609	29,641
Securities held-to-maturity, Unrealized loss position, Fair Value, Less than 12 Months		4,979
Securities held-to-maturity, Unrealized loss position, Fair Value		4,979
Total securities, Unrealized loss position, Fair Value, Less than 12 Months		31,618
Total securities, Unrealized loss position, Fair Value, 12 Months or Longer		3,002
Total securities, Unrealized loss position, Fair Value		34,620
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, Less than 12 Months	(1,835)	(1,170)
Securities available-for-sale, Unrealized loss position, Unrealized losses, 12 Months or Longer	(9)	(11)
Securities available-for-sale, Unrealized losses	(1,844)	(1,181)
Securities held-to-maturity, Unrealized loss position, Unrealized losses, Less than 12 Months		(21)
Securities held-to-maturity, Unrealized losses		(21)
Unrealized loss position, Less than 12 Months, Unrealized Losses		(1,191)
Unrealized loss position, 12 Months or Longer, Unrealized Losses		(11)
Unrealized loss position, Unrealized Losses		(1,202)
U.S. agency securities
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, Less than 12 Months	3,691	1,986
Securities available-for-sale, Unrealized loss position, Fair Value	3,691	1,986
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, Less than 12 Months	(272)	(1)
Securities available-for-sale, Unrealized losses	(272)	(1)
Corporate securities
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, Less than 12 Months	6,596	7,059
Securities available-for-sale, Unrealized loss position, Fair Value	6,596	7,059
Securities held-to-maturity, Unrealized loss position, Fair Value, Less than 12 Months		4,979
Securities held-to-maturity, Unrealized loss position, Fair Value		4,979
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, Less than 12 Months	(402)	(939)
Securities available-for-sale, Unrealized losses	(402)	(939)
Securities held-to-maturity, Unrealized loss position, Unrealized losses, Less than 12 Months		(21)
Securities held-to-maturity, Unrealized losses		(21)
Municipal bonds
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, Less than 12 Months	31,881	8,377
Securities available-for-sale, Unrealized loss position, Fair Value	31,881	8,377
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, Less than 12 Months	(905)	(150)
Securities available-for-sale, Unrealized losses	(905)	(150)
Mortgage-backed securities
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, Less than 12 Months	18,451	6,903
Securities available-for-sale, Unrealized loss position, Fair Value, 12 Months or Longer	2,990	3,002
Securities available-for-sale, Unrealized loss position, Fair Value	21,441	9,905
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, Less than 12 Months	(256)	(65)
Securities available-for-sale, Unrealized loss position, Unrealized losses, 12 Months or Longer	(9)	(11)
Securities available-for-sale, Unrealized losses	$ (265)	(76)
U.S. Small Business Administration securities
Fair Value
Securities available-for-sale, Unrealized loss position, Fair Value, Less than 12 Months		2,314
Securities available-for-sale, Unrealized loss position, Fair Value		2,314
Unrealized Losses
Securities available-for-sale, Unrealized loss position, Unrealized losses, Less than 12 Months		(15)
Securities available-for-sale, Unrealized losses		$ (15)

Investments - Available for Sal

Investments - Available for Sale Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Debt and Equity Securities, FV-NI [Line Items]
Proceeds from sale of available-for-sale securities	$ 0	$ 0
Gains from sale of available-for-sale securities	0	0
Losses from sale of available-for-sale securities	0	$ 0
Amortized Cost
Securities available-for-sale, Total	199,039		$ 173,560
Securities held-to-maturity, Total	7,500		7,500
Total securities	206,539		181,060
Fair Value
Securities available-for-sale, Total	201,311		178,018
Securities held-to-maturity, Total	7,873		7,556
Total securities	209,184		185,574
U.S. agency securities
Amortized Cost
Securities available-for-sale, Due after one year through five years	973		978
Securities available-for-sale, Due after five years through ten years	1,000		1,000
Securities available-for-sale, Due after ten years	5,963		5,962
Securities available-for-sale, Subtotal	7,936		7,940
Securities available-for-sale, Total	7,936		7,940
Fair Value
Securities available-for-sale, Due after one year through five years	1,045		1,060
Securities available-for-sale, Due after five years through ten years	1,032		1,036
Securities available-for-sale, Due after ten years	5,751		6,009
Securities available-for-sale, Subtotal	7,828		8,105
Securities available-for-sale, Total	7,828		8,105
Corporate securities
Amortized Cost
Securities available-for-sale, Due in one year or less	2,403		2,392
Securities available-for-sale, Due after one year through five years	3,493		3,493
Securities available-for-sale, Due after five years through ten years	4,000		4,000
Securities available-for-sale, Due after ten years	2,000		2,000
Securities available-for-sale, Subtotal	11,896		11,885
Securities available-for-sale, Total	11,896		11,885
Securities held-to-maturity, Due after five years through ten years	7,500		7,500
Fair Value
Securities available-for-sale, Due in one year or less	2,430		2,433
Securities available-for-sale, Due after one year through five years	3,505		3,491
Securities available-for-sale, Due after five years through ten years	3,790		3,676
Securities available-for-sale, Due after ten years	1,820		1,400
Securities available-for-sale, Subtotal	11,545		11,000
Securities available-for-sale, Total	11,545		11,000
Securities held-to-maturity, Due after five years through ten years	7,873		7,556
Municipal bonds
Amortized Cost
Securities available-for-sale, Due in one year or less	100		101
Securities available-for-sale, Due after one year through five years	3,743		3,749
Securities available-for-sale, Due after five years through ten years	7,951		7,994
Securities available-for-sale, Due after ten years	84,800		57,728
Securities available-for-sale, Subtotal	96,594		69,572
Securities available-for-sale, Total	96,594		69,572
Fair Value
Securities available-for-sale, Due in one year or less	100		101
Securities available-for-sale, Due after one year through five years	3,939		3,980
Securities available-for-sale, Due after five years through ten years	8,254		8,321
Securities available-for-sale, Due after ten years	85,356		59,455
Securities available-for-sale, Subtotal	97,649		71,857
Securities available-for-sale, Total	97,649		71,857
Mortgage-backed securities
Amortized Cost
Securities available-for-sale, Mortgage-backed securities	66,104		65,722
Securities available-for-sale, Total	66,104		65,722
Fair Value
Securities available-for-sale, Mortgage-backed securities	67,401		68,187
Securities available-for-sale, Total	67,401		68,187
Federal National Mortgage Association ("FNMA")
Amortized Cost
Securities available-for-sale, Mortgage-backed securities	49,693		47,675
Fair Value
Securities available-for-sale, Mortgage-backed securities	50,894		50,005
Federal Home Loan Mortgage Corporation ("FHLMC")
Amortized Cost
Securities available-for-sale, Mortgage-backed securities	11,189		11,825
Fair Value
Securities available-for-sale, Mortgage-backed securities	11,204		11,913
Government National Mortgage Association ("GNMA")
Amortized Cost
Securities available-for-sale, Mortgage-backed securities	5,222		6,222
Fair Value
Securities available-for-sale, Mortgage-backed securities	5,303		6,269
U.S. Small Business Administration securities
Amortized Cost
Securities available-for-sale, Due after one year through five years	3,470		2,266
Securities available-for-sale, Due after five years through ten years	5,192		8,097
Securities available-for-sale, Due after ten years	7,847		8,078
Securities available-for-sale, Subtotal	16,509		18,441
Securities available-for-sale, Total	16,509		18,441
Fair Value
Securities available-for-sale, Due after one year through five years	3,554		2,353
Securities available-for-sale, Due after five years through ten years	5,355		8,333
Securities available-for-sale, Due after ten years	7,979		8,183
Securities available-for-sale, Subtotal	16,888		18,869
Securities available-for-sale, Total	$ 16,888		$ 18,869

Loans Receivable and Allowanc_3

Loans Receivable and Allowance For Loan Losses - Composition of Loan Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	$ 1,625,085	$ 1,574,227	$ 1,411,874
Allowance for loan losses	(27,375)	(26,172)
Deferred costs and fees, net	(5,278)	(4,017)
Premiums on purchased loans, net	628	943
Total loans receivable, net	1,593,060	1,544,981
REAL ESTATE LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	931,767	925,481	862,676
REAL ESTATE LOANS \| Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	226,799	222,719
REAL ESTATE LOANS \| Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	241,677	216,975
REAL ESTATE LOANS \| Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	41,352	43,093
REAL ESTATE LOANS \| One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	299,316	311,093
REAL ESTATE LOANS \| Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	122,623	131,601
CONSUMER LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	382,849	375,178	335,095
CONSUMER LOANS \| Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	294,455	286,020
CONSUMER LOANS \| Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	85,275	85,740
CONSUMER LOANS \| Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	3,119	3,418
COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	310,469	273,568	$ 214,103
COMMERCIAL BUSINESS LOANS \| Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	261,932	224,476
COMMERCIAL BUSINESS LOANS \| Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable, gross	$ 48,537	$ 49,092

Loans Receivable and Allowanc_4

Loans Receivable and Allowance For Loan Losses - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021USD ($)divisionsegmentitem	Dec. 31, 2020USD ($)	Mar. 31, 2020USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 1,625,085	$ 1,574,227	$ 1,411,874
Number of loan portfolio segments \| segment	3
Number of warehouse lending divisions \| division	2
Loans that qualify as collateral for FHLB advances	$ 772,000	774,800
Loans that qualify as collateral for Federal Reserve Bank lines of credit	$ 377,300	369,200
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of units in real estate property \| item	5
Paycheck Protection Program Liquidity Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
PPP Loans Collateralized	$ 83,800
Anchor Bancorp
Accounts, Notes, Loans and Financing Receivable [Line Items]
Remaining net discount on loans acquired	1,300	1,500
Loans and Leases Receivable, Gross	$ 121,900	$ 132,600
Minimum term for accrual of interest on loans to be discontinued	90 days

Loans Receivable and Allowanc_5

Loans Receivable and Allowance For Loan Losses - Allowance for Loan Losses by Loan Categories (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
ALLOWANCE FOR LOAN LOSSES
Beginning balance	$ 26,172	$ 13,229
(Recapture) provision for loan losses	1,500	3,686
Charge-offs	(541)	(381)
Recoveries	244	338
Net charge-offs	(297)	(43)
Ending balance	27,375	16,872
Period End Amount Allocated to
Loans individually evaluated for impairment	1,425	246
Loans collectively evaluated for impairment	25,950	16,626
Ending balance	27,375	16,872
LOANS RECEIVABLE
Loans individually evaluated for impairment	9,276	3,192
Loans collectively evaluated for impairment	1,615,809	1,408,682
Total loans receivable	1,625,085	1,411,874	$ 1,574,227
Unallocated Financing Receivables [Member]
ALLOWANCE FOR LOAN LOSSES
Beginning balance	691	3
(Recapture) provision for loan losses	585	1,183
Ending balance	1,276	1,186
Period End Amount Allocated to
Loans collectively evaluated for impairment	1,276	1,186
Ending balance	1,276	1,186
REAL ESTATE LOANS
ALLOWANCE FOR LOAN LOSSES
Beginning balance	13,846	6,206
(Recapture) provision for loan losses	(231)	1,019
Recoveries		18
Net charge-offs		18
Ending balance	13,615	7,243
Period End Amount Allocated to
Loans individually evaluated for impairment	15	15
Loans collectively evaluated for impairment	13,600	7,228
Ending balance	13,615	7,243
LOANS RECEIVABLE
Loans individually evaluated for impairment	2,896	2,528
Loans collectively evaluated for impairment	928,871	860,148
Total loans receivable	931,767	862,676	925,481
CONSUMER LOANS
ALLOWANCE FOR LOAN LOSSES
Beginning balance	6,696	3,766
(Recapture) provision for loan losses	378	660
Charge-offs	(503)	(370)
Recoveries	244	143
Net charge-offs	(259)	(227)
Ending balance	6,815	4,199
Period End Amount Allocated to
Loans individually evaluated for impairment	241	231
Loans collectively evaluated for impairment	6,574	3,968
Ending balance	6,815	4,199
LOANS RECEIVABLE
Loans individually evaluated for impairment	689	664
Loans collectively evaluated for impairment	382,160	334,431
Total loans receivable	382,849	335,095	375,178
COMMERCIAL BUSINESS LOANS
ALLOWANCE FOR LOAN LOSSES
Beginning balance	4,939	3,254
(Recapture) provision for loan losses	768	824
Charge-offs	(38)	(11)
Recoveries		177
Net charge-offs	(38)	166
Ending balance	5,669	4,244
Period End Amount Allocated to
Loans individually evaluated for impairment	1,169
Loans collectively evaluated for impairment	4,500	4,244
Ending balance	5,669	4,244
LOANS RECEIVABLE
Loans individually evaluated for impairment	5,691
Loans collectively evaluated for impairment	304,778	214,103
Total loans receivable	$ 310,469	$ 214,103	$ 273,568

Loans Receivable and Allowanc_6

Loans Receivable and Allowance For Loan Losses - Aging Analysis of Past Due Loans) (Details)	3 Months Ended
	Mar. 31, 2021USD ($)loan	Mar. 31, 2020USD ($)loan	Dec. 31, 2020USD ($)loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 7,669,000		$ 6,403,000
Current	1,617,416,000		1,567,824,000
Total loans receivable	$ 1,625,085,000	$ 1,411,874,000	$ 1,574,227,000
Number of TDR loans	0		0
Number of TDRs which incurred payment default \| loan	0	0
REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 5,340,000		$ 3,638,000
Current	926,427,000		921,843,000
Total loans receivable	931,767,000	$ 862,676,000	925,481,000
CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,125,000		1,561,000
Current	381,724,000		373,617,000
Total loans receivable	382,849,000	335,095,000	375,178,000
COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,204,000		1,204,000
Current	309,265,000		272,364,000
Total loans receivable	310,469,000	$ 214,103,000	273,568,000
Commercial Real Estate \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
Current	226,799,000		222,719,000
Total loans receivable	226,799,000		222,719,000
Construction and development \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,359,000		1,850,000
Current	239,318,000		215,125,000
Total loans receivable	241,677,000		216,975,000
Home equity. \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	588,000		483,000
Current	40,764,000		42,610,000
Total loans receivable	41,352,000		43,093,000
One-to-four-family \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,393,000		1,305,000
Current	296,923,000		309,788,000
Total loans receivable	299,316,000		311,093,000
Multi-family \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
Current	122,623,000		131,601,000
Total loans receivable	122,623,000		131,601,000
Indirect home improvement \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	971,000		1,339,000
Current	293,484,000		284,681,000
Total loans receivable	294,455,000		286,020,000
Marine \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	97,000		127,000
Current	85,178,000		85,613,000
Total loans receivable	85,275,000		85,740,000
Other consumer loans \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	57,000		95,000
Current	3,062,000		3,323,000
Total loans receivable	3,119,000		3,418,000
Commercial and industrial \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,204,000		1,204,000
Current	260,728,000		223,272,000
Total loans receivable	261,932,000		224,476,000
Warehouse lending \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
Current	48,537,000		49,092,000
Total loans receivable	48,537,000		49,092,000
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,792,000		3,150,000
30-59 Days Past Due \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,226,000		2,366,000
30-59 Days Past Due \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	566,000		784,000
30-59 Days Past Due \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
30-59 Days Past Due \| Commercial Real Estate \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
30-59 Days Past Due \| Construction and development \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	509,000		1,850,000
30-59 Days Past Due \| Home equity. \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	66,000		127,000
30-59 Days Past Due \| One-to-four-family \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,651,000		389,000
30-59 Days Past Due \| Multi-family \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
30-59 Days Past Due \| Indirect home improvement \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	457,000		683,000
30-59 Days Past Due \| Marine \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	67,000		28,000
30-59 Days Past Due \| Other consumer loans \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	42,000		73,000
30-59 Days Past Due \| Commercial and industrial \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
30-59 Days Past Due \| Warehouse lending \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	705,000		2,175,000
60-89 Days Past Due \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	326,000		541,000
60-89 Days Past Due \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	379,000		430,000
60-89 Days Past Due \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		1,204,000
60-89 Days Past Due \| Commercial Real Estate \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
60-89 Days Past Due \| Construction and development \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
60-89 Days Past Due \| Home equity. \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	108,000		137,000
60-89 Days Past Due \| One-to-four-family \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	218,000		404,000
60-89 Days Past Due \| Multi-family \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
60-89 Days Past Due \| Indirect home improvement \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	340,000		331,000
60-89 Days Past Due \| Marine \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	30,000		77,000
60-89 Days Past Due \| Other consumer loans \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9,000		22,000
60-89 Days Past Due \| Commercial and industrial \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		1,204,000
60-89 Days Past Due \| Warehouse lending \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 4,172,000		$ 1,078,000
Number Of Loans Accruing Interest \| loan	0		0
90 Days or More Past Due \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 2,788,000		$ 731,000
90 Days or More Past Due \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	180,000		347,000
90 Days or More Past Due \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,204,000		0
90 Days or More Past Due \| Commercial Real Estate \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 Days or More Past Due \| Construction and development \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,850,000		0
90 Days or More Past Due \| Home equity. \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	414,000		219,000
90 Days or More Past Due \| One-to-four-family \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	524,000		512,000
90 Days or More Past Due \| Multi-family \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
90 Days or More Past Due \| Indirect home improvement \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	174,000		325,000
90 Days or More Past Due \| Marine \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		22,000
90 Days or More Past Due \| Other consumer loans \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,000		0
90 Days or More Past Due \| Commercial and industrial \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,204,000		0
90 Days or More Past Due \| Warehouse lending \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0		0
Non-Accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	9,276,000		7,761,000
Non-Accrual \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	2,896,000		1,280,000
Non-Accrual \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	689,000		871,000
Non-Accrual \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	5,691,000		5,610,000
Non-Accrual \| Commercial Real Estate \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	0		0
Non-Accrual \| Construction and development \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	1,850,000		0
Non-Accrual \| Home equity. \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	522,000		636,000
Non-Accrual \| One-to-four-family \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	524,000		644,000
Non-Accrual \| Multi-family \| REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	0		0
Non-Accrual \| Indirect home improvement \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	626,000		826,000
Non-Accrual \| Marine \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	56,000		44,000
Non-Accrual \| Other consumer loans \| CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	7,000		1,000
Non-Accrual \| Commercial and industrial \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	5,691,000		5,610,000
Non-Accrual \| Warehouse lending \| COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	0		$ 0
Covid 19 \| Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans restructured or modified	22,900,000
Covid 19 \| One-to-four-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans restructured or modified	308,000
Covid 19 \| CONSUMER LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans restructured or modified	157,000
Covid 19 \| COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans restructured or modified	11,500,000
Amount of loans current and non accruing and not classified as TDRs	$ 4,500,000

Loans Receivable and Allowanc_7

Loans Receivable and Allowance For Loan Losses - Financing Receivables, Related Allowance Recorded and No Related Allowance Recorded (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with an allowance recorded	$ 6,441	$ 5,339
Impaired Financing Receivable, Unpaid Principal Balance, Total	9,382	7,874
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with an allowance recorded	6,440	5,338
Recorded Investment	9,276	7,761
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with an allowance recorded	1,425	1,310
Related Allowance	1,425	1,310
One-to-four-family
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with an allowance recorded		61
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with an allowance recorded		60
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with an allowance recorded		15
REAL ESTATE LOANS
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded	2,941	2,535
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded	2,836	2,423
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with no related allowance recorded	0	0
REAL ESTATE LOANS \| Construction and development
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded	1,850
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded	1,850
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with no related allowance recorded	0
REAL ESTATE LOANS \| Home equity.
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded	578	687
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded	522	636
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with no related allowance recorded	0	0
REAL ESTATE LOANS \| One-to-four-family
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded	513	645
Unpaid Principal Balance, with an allowance recorded	61
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded	464	584
Recorded Investment, with an allowance recorded	60
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with no related allowance recorded	0	0
Related Allowance, with an allowance recorded	15
REAL ESTATE LOANS \| Other consumer loans
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded		1,203
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded		1,203
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with no related allowance recorded		0
CONSUMER LOANS \| Indirect home improvement
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with an allowance recorded	626	826
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with an allowance recorded	626	826
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with an allowance recorded	219	289
CONSUMER LOANS \| Marine
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with an allowance recorded	56	44
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with an allowance recorded	56	44
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with an allowance recorded	20	15
CONSUMER LOANS \| Other consumer loans
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with an allowance recorded	7	1
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with an allowance recorded	7	1
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with an allowance recorded	2	1
COMMERCIAL BUSINESS LOANS \| Commercial and industrial
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with an allowance recorded	5,691	4,407
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with an allowance recorded	5,691	4,407
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with an allowance recorded	$ 1,169	$ 990

Loans Receivable and Allowanc_8

Loans Receivable and Allowance For Loan Losses - Average Recorded Investment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	$ 3,045	$ 2,539
Average Recorded Investment, with an allowance recorded	6,563	650
Impaired Financing Receivable, Average Recorded Investment	9,608	3,189
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	4	13
Interest Income Recognized, with an allowance recorded	15	13
Interest Income Recognized	19	26
REAL ESTATE LOANS \| Commercial Real Estate
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	0	1,084
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	0	8
REAL ESTATE LOANS \| Construction and development
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with an allowance recorded	1,850	0
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	0	0
REAL ESTATE LOANS \| Home equity.
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	652	220
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	2	0
REAL ESTATE LOANS \| One-to-four-family
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	543	1,230
Average Recorded Investment, with an allowance recorded	60	60
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	2	5
Interest Income Recognized, with an allowance recorded	0	0
CONSUMER LOANS \| Indirect home improvement
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with an allowance recorded	786	548
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with an allowance recorded	14	13
CONSUMER LOANS \| Marine
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with an allowance recorded	36	41
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with an allowance recorded	1	0
CONSUMER LOANS \| Other consumer loans
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	0	5
Average Recorded Investment, with an allowance recorded	3	1
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	0	0
Interest Income Recognized, with an allowance recorded	0	0
COMMERCIAL BUSINESS LOANS \| Commercial and industrial
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with an allowance recorded	5,678	0
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with an allowance recorded	$ 0	$ 0

Loans Receivable and Allowanc_9

Loans Receivable and Allowance For Loan Losses - Loans by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,625,085	$ 1,574,227	$ 1,411,874
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,528,130	1,461,600
Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	68,258	87,858
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,801	7,122
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	20,896	17,647
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	931,767	925,481	862,676
REAL ESTATE LOANS \| Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	226,799	222,719
REAL ESTATE LOANS \| Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	241,677	216,975
REAL ESTATE LOANS \| Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	41,352	43,093
REAL ESTATE LOANS \| One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	299,316	311,093
REAL ESTATE LOANS \| Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	122,623	131,601
REAL ESTATE LOANS \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	864,818	847,809
REAL ESTATE LOANS \| Pass \| Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	169,396	157,932
REAL ESTATE LOANS \| Pass \| Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	239,827	212,209
REAL ESTATE LOANS \| Pass \| Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	40,830	42,457
REAL ESTATE LOANS \| Pass \| One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	292,142	303,610
REAL ESTATE LOANS \| Pass \| Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	122,623	131,601
REAL ESTATE LOANS \| Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	53,627	63,913
REAL ESTATE LOANS \| Watch \| Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	53,627	60,834
REAL ESTATE LOANS \| Watch \| Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans		2,917
REAL ESTATE LOANS \| Watch \| Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Watch \| One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans		162
REAL ESTATE LOANS \| Watch \| Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,028	5,049
REAL ESTATE LOANS \| Special Mention \| Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,842	3,013
REAL ESTATE LOANS \| Special Mention \| Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans		1,849
REAL ESTATE LOANS \| Special Mention \| Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Special Mention \| One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	186	187
REAL ESTATE LOANS \| Special Mention \| Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,294	8,710
REAL ESTATE LOANS \| Substandard \| Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	934	940
REAL ESTATE LOANS \| Substandard \| Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,850	0
REAL ESTATE LOANS \| Substandard \| Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	522	636
REAL ESTATE LOANS \| Substandard \| One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,988	7,134
REAL ESTATE LOANS \| Substandard \| Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Doubtful \| Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Doubtful \| Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Doubtful \| Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Doubtful \| One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Doubtful \| Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Loss \| Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Loss \| Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Loss \| Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Loss \| One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
REAL ESTATE LOANS \| Loss \| Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	382,849	375,178	335,095
CONSUMER LOANS \| Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	294,455	286,020
CONSUMER LOANS \| Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	85,275	85,740
CONSUMER LOANS \| Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,119	3,418
CONSUMER LOANS \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	382,160	374,307
CONSUMER LOANS \| Pass \| Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	293,829	285,194
CONSUMER LOANS \| Pass \| Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	85,219	85,696
CONSUMER LOANS \| Pass \| Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,112	3,417
CONSUMER LOANS \| Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Watch \| Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Watch \| Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Watch \| Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Special Mention \| Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Special Mention \| Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Special Mention \| Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	689	871
CONSUMER LOANS \| Substandard \| Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	626	826
CONSUMER LOANS \| Substandard \| Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	56	44
CONSUMER LOANS \| Substandard \| Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	7	1
CONSUMER LOANS \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Doubtful \| Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Doubtful \| Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Doubtful \| Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Loss \| Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Loss \| Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
CONSUMER LOANS \| Loss \| Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	310,469	273,568	$ 214,103
COMMERCIAL BUSINESS LOANS \| Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	261,932	224,476
COMMERCIAL BUSINESS LOANS \| Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	48,537	49,092
COMMERCIAL BUSINESS LOANS \| Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	281,152	239,484
COMMERCIAL BUSINESS LOANS \| Pass \| Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	232,615	190,392
COMMERCIAL BUSINESS LOANS \| Pass \| Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	48,537	49,092
COMMERCIAL BUSINESS LOANS \| Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	14,631	23,945
COMMERCIAL BUSINESS LOANS \| Watch \| Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	14,631	23,945
COMMERCIAL BUSINESS LOANS \| Watch \| Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
COMMERCIAL BUSINESS LOANS \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,773	2,073
COMMERCIAL BUSINESS LOANS \| Special Mention \| Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,773	2,073
COMMERCIAL BUSINESS LOANS \| Special Mention \| Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
COMMERCIAL BUSINESS LOANS \| Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	9,913	8,066
COMMERCIAL BUSINESS LOANS \| Substandard \| Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 9,913	8,066
COMMERCIAL BUSINESS LOANS \| Substandard \| Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
COMMERCIAL BUSINESS LOANS \| Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
COMMERCIAL BUSINESS LOANS \| Doubtful \| Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
COMMERCIAL BUSINESS LOANS \| Doubtful \| Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
COMMERCIAL BUSINESS LOANS \| Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
COMMERCIAL BUSINESS LOANS \| Loss \| Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
COMMERCIAL BUSINESS LOANS \| Loss \| Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans		$ 0

Servicing Rights - Narrative (D

Servicing Rights - Narrative (Details) - USD ($)	3 Months Ended
Servicing Rights - Narrative (Details) - USD ($)	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractually specified servicing fees, late fees, and other ancillary fees	$ 1,400,000	$ 977,000
Mortgage servicing rights
Off-balance Sheet Risks, Disclosure Information [Line Items]
The unpaid principal balances of mortgage loans serviced	2,340,000,000		$ 2,170,000,000
Fair market value of servicing rights' assets	$ 23,300,000		$ 12,800,000

Servicing Rights - Servicing Ri

Servicing Rights - Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance	$ 12,595	$ 11,560
Additions	3,144	1,185
Servicing rights amortized	(2,054)	(1,605)
Recovery (impairment) of servicing rights	2,050	(514)
Ending balance	$ 15,735	$ 10,626

Servicing Rights - Valuation As

Servicing Rights - Valuation Assumptions (Details) - Mortgage servicing rights	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Off-balance Sheet Risks, Disclosure Information [Line Items]
Weighted average discount rate	9.10%	9.10%
Conditional prepayment rate ("CPR")	14.70%	32.60%
Weighted average life in years	5 years 10 months 24 days	3 years

Servicing Rights - Changes in V

Servicing Rights - Changes in Valuation Assumptions (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Off-balance Sheet Risks, Disclosure Information [Line Items]
Basis Points Drop in Note Rate, Assumption One	0.50%	0.50%
Basis Points Drop in Note Rate, Assumption Two	1.00%	1.00%
Mortgage servicing rights
Off-balance Sheet Risks, Disclosure Information [Line Items]
Aggregate portfolio principal balance	$ 2,335,329	$ 2,133,473
Weighted average rate of note	3.30%	3.50%
Conditional prepayment rate	14.70%	32.60%
Conditional prepayment rate, 0.5% Adverse Change	19.60%	40.60%
Conditional prepayment rate, 1.0% Adverse Change	27.00%	59.60%
Fair value MSR	$ 23,256	$ 12,833
Fair value MSR, 0.5% Adverse Change	19,979	10,922
Fair value of MSR, 1.0% Adverse Change	$ 16,157	$ 8,286
Percentage of MSR	1.00%	0.60%
Percentage of MSR, 0.5% Adverse Change	0.90%	0.50%
Percentage of MSR, 1.0% Adverse Change	0.70%	0.40%
Discount rate	9.10%	9.10%
Discount rate, 0.5% Adverse Change	9.60%	9.60%
Discount rate, 1.0% Adverse Change	10.10%	10.10%
Fair value MSR, 0.5% Adverse Change	$ 22,820	$ 12,696
Fair value MSR, 1.0% Adverse Change	$ 22,400	$ 12,562
Percentage of MSR, 0.5% Adverse Change	1.00%	0.60%
Percentage of MSR, 1.0% Adverse Change	1.00%	0.60%

Derivatives (Details)

Derivatives (Details)	3 Months Ended		12 Months Ended
Derivatives (Details)	Mar. 31, 2021USD ($)security	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)
Derivative [Line Items]
Net unrealized loss on cash flow hedges recorded in accumulated other comprehensive income	$ 63,000		$ 967,000
Reclassification of loss to interest expense related to cash flow hedges	114,000	$ 1,000
Reclassification to interest expense related to cash flow hedges over next 12 months	477,000
Derivative instruments, (loss) gain on sale of loans	$ (931,000)	$ 1,700,000
Asset pledged as collateral
Derivative [Line Items]
Number of securities pledged \| security	2
Carrying value of assets pledged	$ 3,300,000
Not Designated as Hedging Instrument \| Mortgage-backed securities
Derivative [Line Items]
Margin collateral	$ 201,000		$ 3,300,000

Derivatives - Derivative instru

Derivatives - Derivative instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Designated as Hedging Instrument \| Interest rate swaps \| Cash Flow Hedges
Derivative [Line Items]
Notional	$ 90,000	$ 90,000
Fair Value, Asset	650	21
Fair Value, Liability	731	1,252
Not Designated as Hedging Instrument \| Interest rate lock commitments with customers
Derivative [Line Items]
Notional	129,059	136,739
Fair Value, Asset	1,985	4,024
Fair Value, Liability	0	0
Not Designated as Hedging Instrument \| Mandatory and best effort forward commitments with investors
Derivative [Line Items]
Notional	47,433	25,027
Fair Value, Asset	506	0
Fair Value, Liability	0	67
Not Designated as Hedging Instrument \| Mortgage-backed securities
Derivative [Line Items]
Notional	213,000	232,000
Not Designated as Hedging Instrument \| Forward TBA mortgage-backed securities
Derivative [Line Items]
Notional	213,000	232,000
Fair Value, Asset	3,232	0
Fair Value, Liability	$ 0	$ 1,602

Leases (Details)

Leases (Details)	3 Months Ended
Leases (Details)	Mar. 31, 2021
Lessee, Lease, Description [Line Items]
Options to extend	true
Renewal term	5 years
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease terms	2 months
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease terms	9 years 3 months

Leases - Components of lease co

Leases - Components of lease cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Lease cost:
Operating lease cost	$ 348	$ 343
Short-term lease cost	1	8
Total lease cost	349	351
Operating cash flows from operating leases	$ 349	$ 336
Weighted average remaining lease term- operating leases	5 years 1 month 6 days	5 years 2 months 12 days
Weighted average discount rate- operating leases	2.33%	2.97%

Leases - Maturities of operatin

Leases - Maturities of operating lease liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Maturities of operating lease liabilities
Remainder of 2021	$ 1,026
2022	1,336
2023	954
2024	882
2025	530
Thereafter	949
Total lease payments	5,677
Less imputed interest	(392)
Operating lease liabilities	$ 5,285	$ 5,176

Other Real Estate Owned - Activ

Other Real Estate Owned - Activity related to OREO (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other Real Estate [Roll Forward]
Beginning balance	$ 90	$ 168
Additions
Gross proceeds from sale of OREO	(81)	(76)
Loss on sale of OREO	$ (9)	(2)
Ending balance		$ 90

Other Real Estate Owned - Narra

Other Real Estate Owned - Narrative (Details)	3 Months Ended
Other Real Estate Owned - Narrative (Details)	Mar. 31, 2021USD ($)property	Mar. 31, 2020USD ($)property
Banking and Thrift [Abstract]
OREO properties		$ 90,000
Number of OREO Properties \| property	0	1
Holding costs	$ 0	$ 0
Mortgage loans in process of foreclosure	$ 675,000

Deposits - Deposit Liabilities

Deposits - Deposit Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Banking and Thrift [Abstract]
Noninterest-bearing checking	$ 390,855	$ 348,421
Interest-bearing checking	250,907	226,282
Savings	161,140	152,842
Money market	468,753	429,548
Certificates of deposit less than $100,000	285,505	299,157
Certificates of deposit of $100,000 through $250,000	133,570	135,901
Certificates of deposit of $250,000 and over	66,528	67,488
Escrow accounts related to mortgages serviced	23,535	14,432
Total deposits	$ 1,780,793	$ 1,674,071

Deposits - Maturities of Time D

Deposits - Maturities of Time Deposits for Future Periods (Details) $ in Thousands	Mar. 31, 2021USD ($)
Banking and Thrift [Abstract]
Maturing in 2021	$ 282,288
Maturing in 2022	119,901
Maturing in 2023	21,159
Maturing in 2024	24,156
Maturing in 2025	35,926
Thereafter	2,173
Total	$ 485,603

Deposits - Interest Expense by

Deposits - Interest Expense by Deposit Category (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Banking and Thrift [Abstract]
Interest-bearing checking	$ 50	$ 136
Savings and money market	468	826
Certificates of deposit	1,464	2,845
Total	$ 1,982	$ 3,807

Commitments and Contingencies -

Commitments and Contingencies - Commitment (Details) - Commitments to Extend Credit - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	$ 511,960	$ 528,231
REAL ESTATE LOANS.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	329,759	345,786
Commercial Real Estate
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	1,267	1,293
Construction and development
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	128,095	143,666
One-to-four-family
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	146,466	147,712
Home equity.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	53,279	52,457
Multi-family
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	652	658
CONSUMER LOANS.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	23,279	23,365
COMMERCIAL BUSINESS LOANS.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	158,922	159,080
Commercial and industrial
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	106,959	106,171
Warehouse lending
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	$ 51,963	$ 52,909

Commitments and Contingencies_2

Commitments and Contingencies - Narrative (Details)	3 Months Ended
Commitments and Contingencies - Narrative (Details)	Mar. 31, 2021USD ($)action	Dec. 31, 2020USD ($)
Loss Contingencies [Line Items]
Amount of loans sold to FHLB	$ 22,500,000
Federal Home Loan Bank, First Loss Account Established	938,000
Bank recourse obligation	$ 811,000
Bank recourse obligation, percentage of loans outstanding	3.60%
Reserve as a percentage of outstanding CE	10.00%
Reserve for loans sold	$ 272,000
Outstanding delinquencies on loans sold to Federal Home Loan Bank	$ 0	$ 498,000
Change of control agreement, executive payment, period following change in control (in months)	12 months
Pending material legal actions \| action	0
CEO
Loss Contingencies [Line Items]
Severance agreement, period of base compensation disbursed as lump sum payment (in months)	24 months
Maximum
Loss Contingencies [Line Items]
Change of control agreement, executive payment, period prior to change in control (in months)	6 months
Change of control agreement, period of base compensation disbursed as lump sum payment (in months)	12 months
Minimum
Loss Contingencies [Line Items]
Change of control agreement, notice required to cancel agreement (in months)	24 months
Commitments to Extend Credit
Loss Contingencies [Line Items]
Reserve for estimated losses	$ 398,000	407,000
Guarantee on loans sold
Loss Contingencies [Line Items]
Reserve for estimated losses	$ 2,200,000	$ 2,000,000

Fair Value Measurements - Avail

Fair Value Measurements - Available for Sale Securities Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 363,965	$ 348,511
Total liabilities measured at fair value	(731)	(2,921)
Securities available-for-sale. \| U.S. agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	7,828	8,105
Securities available-for-sale. \| Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	11,545	11,000
Securities available-for-sale. \| Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	97,649	71,857
Securities available-for-sale. \| Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	67,401	68,187
Securities available-for-sale. \| U.S. Small Business Administration securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	16,888	18,869
Securities available-for-sale. \| Mortgage loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	156,281	166,448
Derivative \| Interest rate lock commitments with customers
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,985	4,024
Derivative \| Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	650	21
Total liabilities measured at fair value	(731)	(1,252)
Derivative \| Mandatory and best effort forward commitments with investors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	506
Total liabilities measured at fair value		(67)
Derivative \| Forward TBA mortgage backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	3,232
Total liabilities measured at fair value		(1,602)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Total liabilities measured at fair value	0	0
Level 1 \| Securities available-for-sale. \| U.S. agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 1 \| Securities available-for-sale. \| Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 1 \| Securities available-for-sale. \| Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 1 \| Securities available-for-sale. \| Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 1 \| Securities available-for-sale. \| U.S. Small Business Administration securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 1 \| Securities available-for-sale. \| Mortgage loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 1 \| Derivative \| Interest rate lock commitments with customers
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 1 \| Derivative \| Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Total liabilities measured at fair value	0	0
Level 1 \| Derivative \| Mandatory and best effort forward commitments with investors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0
Total liabilities measured at fair value		0
Level 1 \| Derivative \| Forward TBA mortgage backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0
Total liabilities measured at fair value		0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	360,345	343,376
Total liabilities measured at fair value	(731)	(2,854)
Level 2 \| Securities available-for-sale. \| U.S. agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	7,828	8,105
Level 2 \| Securities available-for-sale. \| Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	10,560	10,016
Level 2 \| Securities available-for-sale. \| Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	97,505	71,730
Level 2 \| Securities available-for-sale. \| Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	67,401	68,187
Level 2 \| Securities available-for-sale. \| U.S. Small Business Administration securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	16,888	18,869
Level 2 \| Securities available-for-sale. \| Mortgage loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	156,281	166,448
Level 2 \| Derivative \| Interest rate lock commitments with customers
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 2 \| Derivative \| Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	650	21
Total liabilities measured at fair value	(731)	(1,252)
Level 2 \| Derivative \| Mandatory and best effort forward commitments with investors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0
Total liabilities measured at fair value		0
Level 2 \| Derivative \| Forward TBA mortgage backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	3,232
Total liabilities measured at fair value		(1,602)
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	3,620	5,135
Total liabilities measured at fair value	0	(67)
Level 3 \| Securities available-for-sale. \| U.S. agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 3 \| Securities available-for-sale. \| Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	985	984
Level 3 \| Securities available-for-sale. \| Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	144	127
Level 3 \| Securities available-for-sale. \| Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 3 \| Securities available-for-sale. \| U.S. Small Business Administration securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 3 \| Securities available-for-sale. \| Mortgage loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Level 3 \| Derivative \| Interest rate lock commitments with customers
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,985	4,024
Level 3 \| Derivative \| Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Total liabilities measured at fair value	0	0
Level 3 \| Derivative \| Mandatory and best effort forward commitments with investors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	506
Total liabilities measured at fair value		(67)
Level 3 \| Derivative \| Forward TBA mortgage backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 0
Total liabilities measured at fair value		$ 0

Fair Value Measurements - Impai

Fair Value Measurements - Impaired Loans and OREO (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing rights, held at cost	$ 15,735	$ 12,595
OREO		90
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans	9,276	7,761
OREO		90
Servicing Rights	23,256	12,833
Fair Value, Measurements, Nonrecurring \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans	0	0
OREO		0
Servicing Rights	0	0
Fair Value, Measurements, Nonrecurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans	0	0
OREO		0
Servicing Rights	0	0
Fair Value, Measurements, Nonrecurring \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans	9,276	7,761
OREO		90
Servicing Rights	$ 23,256	$ 12,833

Fair Value Measurements - Disco

Fair Value Measurements - Discount Rate (Details)	Mar. 31, 2021item	Dec. 31, 2020item
Fair Value, Measurements, Recurring \| Interest rate lock commitments with customers
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	fsbw:MeasurementInputPullThroughExpectationsMember
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	fsbw:QuotedMarketPricesMember
Fair Value, Measurements, Recurring \| Individual forward commitments with investors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	fsbw:MeasurementInputPullThroughExpectationsMember
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	fsbw:QuotedMarketPricesMember
Fair Value, Measurements, Recurring \| Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	us-gaap:MeasurementInputDiscountRateMember
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	us-gaap:ValuationTechniqueDiscountedCashFlowMember
Fair Value, Measurements, Recurring \| Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	us-gaap:MeasurementInputDiscountRateMember
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	us-gaap:ValuationTechniqueDiscountedCashFlowMember
Fair Value, Measurements, Nonrecurring \| Impaired Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	fsbw:MeasurementInputDiscountAppliedToObtainedAppraisalMember
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	fsbw:MeasurementInputPullThroughExpectationsMember
Fair Value, Measurements, Nonrecurring \| Other Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	fsbw:MeasurementInputDiscountAppliedToObtainedAppraisalMember
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	fsbw:FairValueOfCollateralMember
Fair Value, Measurements, Nonrecurring \| Servicing rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	fsbw:PrepaymentSpeedsMember
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	fsbw:IndustrySourcesMember
Level 3 \| Fair Value, Measurements, Recurring \| Interest rate lock commitments with customers \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.80	0.80
Level 3 \| Fair Value, Measurements, Recurring \| Interest rate lock commitments with customers \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.99	0.99
Level 3 \| Fair Value, Measurements, Recurring \| Interest rate lock commitments with customers \| Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.930	0.916
Level 3 \| Fair Value, Measurements, Recurring \| Individual forward commitments with investors \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.80	0.80
Level 3 \| Fair Value, Measurements, Recurring \| Individual forward commitments with investors \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.99	0.99
Level 3 \| Fair Value, Measurements, Recurring \| Individual forward commitments with investors \| Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.930	0.916
Level 3 \| Fair Value, Measurements, Recurring \| Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.025	0.025
Level 3 \| Fair Value, Measurements, Recurring \| Corporate securities \| Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.025	0.025
Level 3 \| Fair Value, Measurements, Recurring \| Municipal bonds \| Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.064	0.064
Level 3 \| Fair Value, Measurements, Nonrecurring \| Impaired Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.100	0.100
Level 3 \| Fair Value, Measurements, Nonrecurring \| Impaired Loans \| Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.100	0.100
Level 3 \| Fair Value, Measurements, Nonrecurring \| Other Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.100	0.100
Level 3 \| Fair Value, Measurements, Nonrecurring \| Other Real Estate Owned \| Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)		0.100
Level 3 \| Fair Value, Measurements, Nonrecurring \| Servicing rights \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0	0
Level 3 \| Fair Value, Measurements, Nonrecurring \| Servicing rights \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.50	0.50
Level 3 \| Fair Value, Measurements, Nonrecurring \| Servicing rights \| Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.147	0.326
Level 3 \| Fair Value, Measurements, Nonrecurring \| Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.064	0.064

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value Level 3 on recurring basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest rate lock commitments with customers
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 4,024	$ 557
Purchases and Issuances	7,691	7,411
Sales and Settlements	(9,730)	(3,677)
Ending Balance	1,985	4,291
Net change in fair value for gains/(losses) relating to items held at end of period included in income	(2,039)	3,734
Individual forward commitments with investors
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	(67)	(195)
Purchases and Issuances	654	(531)
Sales and Settlements	(81)	545
Ending Balance	506	(181)
Net change in fair value for gains/(losses) relating to items held at end of period included in income	573	14
Securities available-for-sale.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	1,111	1,162
Purchases and Issuances	21	12
Sales and Settlements	(3)	(3)
Ending Balance	1,129	1,171
Net change in fair value for gains/(losses) relating to items held at end of period included in other comprehensive	$ 21	$ 12

Fair Value Measurements - Fai_2

Fair Value Measurements - Fair Value By Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financial Assets
Certificates of deposit at other financial institutions	$ 12,278	$ 12,278
Securities available-for-sale, at fair value	201,311	178,018
Securities held-to-maturity (fair value of $7,873 and, $7,556, respectively)	7,500	7,500
Loans held for sale, at fair value	156,281	166,448
Fair Value, Measurements, Recurring
Financial Liabilities
Financial Liabilities Fair Value Disclosure	731	2,921
Level 1 \| Fair Value, Measurements, Recurring
Financial Liabilities
Financial Liabilities Fair Value Disclosure	0	0
Level 2 \| Fair Value, Measurements, Recurring
Financial Liabilities
Financial Liabilities Fair Value Disclosure	731	2,854
Level 3 \| Fair Value, Measurements, Recurring
Financial Liabilities
Financial Liabilities Fair Value Disclosure	0	67
Carrying Amount \| Level 1
Financial Assets
Cash and cash equivalents	85,446	91,576
Certificates of deposit at other financial institutions	12,278	12,278
Carrying Amount \| Level 2
Financial Assets
Securities available-for-sale, at fair value	200,182	176,907
Securities held-to-maturity (fair value of $7,873 and, $7,556, respectively)	7,500	7,500
Loans held for sale, at fair value	156,281	166,448
FHLB stock, at cost	6,475	7,439
Forward TBA mortgage-backed securities	3,232
Interest rate swaps	650	21
Accrued interest receivable	7,429	7,030
Financial Liabilities
Deposits	1,780,793	1,674,071
Borrowings	72,528	165,809
Subordinated note, net	49,344	10,000
Accrued interest payable	367	406
Interest rate swaps	731	1,252
Forward TBA mortgage-backed securities		1,602
Carrying Amount \| Level 3
Financial Assets
Securities available-for-sale, at fair value	1,129	1,111
Loans receivable, gross	1,625,085	1,574,227
Servicing rights, held at lower of cost or fair value	15,735	12,595
Fair value interest rate locks with customers	1,985	4,024
Mandatory and best effort forward commitments with investors	506
Financial Liabilities
Mandatory and best effort forward commitments with investors		67
Fair Value \| Level 1
Financial Assets
Cash and cash equivalents	85,446	91,576
Certificates of deposit at other financial institutions	12,278	12,278
Fair Value \| Level 2
Financial Assets
Securities available-for-sale, at fair value	200,182	176,907
Securities held-to-maturity (fair value of $7,873 and, $7,556, respectively)	7,873	7,556
Loans held for sale, at fair value	156,281	166,448
FHLB stock, at cost	6,475	7,439
Forward TBA mortgage-backed securities	3,232
Interest rate swaps	650	21
Accrued interest receivable	7,429	7,030
Financial Liabilities
Deposits	1,778,529	1,674,328
Borrowings	74,000	167,680
Subordinated note, net	50,500	11,083
Accrued interest payable	367	406
Interest rate swaps	731	1,252
Forward TBA mortgage-backed securities		1,602
Fair Value \| Level 3
Financial Assets
Securities available-for-sale, at fair value	1,129	1,111
Loans receivable, gross	1,656,583	1,580,360
Servicing rights, held at lower of cost or fair value	23,256	12,833
Fair value interest rate locks with customers	1,985	4,024
Mandatory and best effort forward commitments with investors	$ 506
Financial Liabilities
Mandatory and best effort forward commitments with investors		$ 67

Employee Benefits - Narrative (

Employee Benefits - Narrative (Details) - USD ($)	Jul. 09, 2012	Jan. 01, 2012	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Compensation and Retirement Disclosure [Abstract]
Number of hours of service required for participation in ESOP, per first 12 month period (in hours)		1000 hours
Vesting percentage after requisite service period is met (as a percent)		100.00%
Requisite service period (in years)		2 years
Employee stock ownership plan (ESOP), requisite service period (in hours)		1000 hours
Employee Stock Ownership Plan (ESOP), Debt Structure, Employer Loan, Amount	$ 2,600,000
Employee stock ownership plan shares purchased	259,210
Shares acquired (in shares)			239,665	241,353
Employee stock ownership plan (ESOP), weighted average purchase price of shares purchased (in dollars per share)	$ 10.17
Amortization period of ESOP loan	10 years
Employee stock ownership plan (ESOP), debt structure, employer loan, interest rate	2.30%
Employee stock ownership plan (ESOP), periodic installment payments from esop, amount paid					$ 282,000
Employee stock ownership plan (ESOP), interest payments from esop					$ 13,000
ESOP compensation expense for allocated shares			$ 402,000	$ 325,000

Employee Benefits - Schedule of

Employee Benefits - Schedule of Shares Under ESOP (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]
Allocated shares	213,744	189,511
Committed to be released shares	6,480	6,480
Unallocated shares	19,441	45,362
Total ESOP shares (in shares)	239,665	241,353
Fair value of unallocated shares (in thousands)	$ 1,205	$ 2,276

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator (in thousands):
Net Income	$ 11,883	$ 5,167
Dividends and undistributed earnings allocated to participating securities	(170)	(56)
Net income available to common shareholders	$ 11,713	$ 5,111
Denominator (shown as actual):
Basic weighted average common shares outstanding (in shares)	4,215,376	4,391,499
Dilutive shares (in shares)	123,708	87,419
Diluted weighted average common shares outstanding (in shares)	4,339,084	4,478,918
Basic earnings per share(in dollars per share)	$ 2.78	$ 1.16
Diluted earnings per share(in dollars per share)	$ 2.70	$ 1.14
Potentially dilutive weighted average share options that were not included in the computation of diluted earnings per share because to do so would be anti-dilutive	5,294	41,627

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($)	Aug. 15, 2020	Sep. 30, 2013	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	May 17, 2018	May 08, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award contractual life			10 years
2013 Equity Incentive Plan \| Equity option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)		324,013
Market value of stock (in dollars per share)							$ 16.89
Granted (in shares)		322,000
Shares available for grant			6,013
2013 Equity Incentive Plan \| Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)		129,605
2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense			$ 295,000
2018 Equity Incentive Plan \| Equity option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant			274,000
Unrecognized compensation cost, nonvested awards			$ 1,300,000
Remaining weighted-average vesting period			3 years 2 months 12 days
Shares	62,285
2018 Equity Incentive Plan \| Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)						163,000
Shares available for grant			92,905
Unrecognized compensation cost, nonvested awards			$ 2,200,000
Shares	24,880
2018 Equity Incentive Plan \| Restricted stock awards \| Independent Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			1 year
2018 Equity Incentive Plan \| Restricted stock awards \| Officers And Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			5 years
2018 Equity Incentive Plan \| Equity option and restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)						650,000
Market value of stock (in dollars per share)	$ 42.70
2013 and 2018 Equity Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense				$ 224,000
Expected term in years					6 years 6 months 29 days
Expected forfeiture rate over contractual term			3.10%
Remaining weighted-average vesting period			6 years 4 months 9 days
Total intrinsic value of options exercised			$ 96,175
2013 and 2018 Equity Incentive Plans \| Equity option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award contractual life			10 years
Expiration period			10 years
One year vesting \| 2013 and 2018 Equity Incentive Plans \| Equity option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term in years			5 years 6 months
One year vesting \| 2013 and 2018 Equity Incentive Plans \| Equity option \| Directors Excluding CEO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			1 year
Five year vesting \| 2013 and 2018 Equity Incentive Plans \| Equity option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting percentage			20.00%
Expected term in years			6 years 6 months
Five year vesting \| 2013 and 2018 Equity Incentive Plans \| Equity option \| Directors Excluding CEO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			5 years
Five year vesting \| 2013 and 2018 Equity Incentive Plans \| Equity option \| Officers And Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			5 years

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Shares
Award contractual life	10 years
2013 and 2018 Equity Incentive Plans
Shares
Outstanding, beginning balance (in shares)	335,877
Less exercised (in shares)	2,500
Outstanding, ending balance (in shares)	333,377	335,877
Expected to vest, assuming a 0.31% annual forfeiture rate (in shares)	332,448
Exercisable (in shares)	172,488
Annual forfeiture rate	0.31%
Expected forfeiture rate over contractual term	3.10%
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 38.90
Less exercised (in dollars per share)	16.89
Outstanding, ending balance (in dollars per share)	39.06	$ 38.90
Expected to vest, assuming a 0.31% annual forfeiture rate (in dollars per share)	39.04
Exercisable (in dollars per share)	$ 28.79
Weighted-Average Remaining Contractual Term In Years
Outstanding, beginning balance		6 years 6 months 29 days
Outstanding, ending balance	6 years 4 months 9 days
Expected to vest, assuming a 0.31% annual forfeiture rate, Weighted Average Remaining Contractual Term	6 years 4 months 9 days
Exercisable	4 years 5 months 19 days
Aggregate Intrinsic Value
Beginning balance	$ 5,721,159
Less exercised	96,175
Ending balance	9,380,259	$ 5,721,159
Expected to vest, assuming a 0.31% annual forfeiture rate	9,362,972
Exercisable	$ 6,625,647

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Awards (Details) - Restricted stock awards	3 Months Ended
	Mar. 31, 2021$ / sharesshares
Shares
Nonvested, Beginning balance (in shares) \| shares	55,092
Granted (shares) \| shares	0
Less vested (in shares) \| shares	0
Forfeited or expired ( in shares) \| shares	0
Nonvested, Ending balance (in shares) \| shares	55,092
Weighted-Average Grant-Date Fair Value Per Share
Nonvested, Beginning balance (in dollars per share) \| $ / shares	$ 48.70
Granted (in dollars per share) \| $ / shares	0
Less vested (in dollars per share) \| $ / shares	0
Forfeited or expired (in dollars per share) \| $ / shares	0
Nonvested, Ending balance (in dollars per share) \| $ / shares	$ 48.70
2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average vesting period	3 years 4 months 24 days
2018 Equity Incentive Plan \| Independent Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
2018 Equity Incentive Plan \| Officers And Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years

Regulatory Capital - Regulatory

Regulatory Capital - Regulatory Capital Ratios Policy (Details) $ in Millions	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 leverage capital, Ratio	10.9	11.1
1st Security Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 leverage capital, Ratio	11.8	10.9
Tier One Leverage Capital	$ 250.9	$ 215.9
Tier 1 leverage capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 180.4	$ 159.1

Business Segments - Narrative (

Business Segments - Narrative (Details)	3 Months Ended
Business Segments - Narrative (Details)	Mar. 31, 2021itemsegment
Segment Reporting Information [Line Items]
Number of operating segments \| segment	2
Retail Deposit \| Pacific Northwest
Segment Reporting Information [Line Items]
Number of bank branches \| item	21

Business Segments - Segment Fin

Business Segments - Segment Financial Results (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)employee	Mar. 31, 2020USD ($)employee
Segment Reporting Information [Line Items]
Net interest income	$ 20,100	$ 17,473
Benefit (provision) for loan losses	(1,500)	(3,686)
Noninterest income	13,034	8,891
Noninterest expense	(16,349)	(16,184)
INCOME BEFORE PROVISION FOR INCOME TAXES	15,285	6,494
Provision for income taxes	(3,402)	(1,327)
NET INCOME	11,883	5,167
Total average assets for year ended	$ 2,130,598	$ 1,734,035
FTEs \| employee	509	444
Home Lending
Segment Reporting Information [Line Items]
Net interest income	$ 1,622	$ 1,181
Benefit (provision) for loan losses	58	(559)
Noninterest income	10,832	5,158
Noninterest expense	(3,131)	(4,162)
INCOME BEFORE PROVISION FOR INCOME TAXES	9,381	1,618
Provision for income taxes	(2,088)	(331)
NET INCOME	7,293	1,287
Total average assets for year ended	$ 405,001	$ 327,441
FTEs \| employee	154	127
Commercial and Consumer Banking
Segment Reporting Information [Line Items]
Net interest income	$ 18,478	$ 16,292
Benefit (provision) for loan losses	(1,558)	(3,127)
Noninterest income	2,202	3,733
Noninterest expense	(13,218)	(12,022)
INCOME BEFORE PROVISION FOR INCOME TAXES	5,904	4,876
Provision for income taxes	(1,314)	(996)
NET INCOME	4,590	3,880
Total average assets for year ended	$ 1,725,597	$ 1,406,594
FTEs \| employee	355	317

Goodwill and other Intangible_3

Goodwill and other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Goodwill				$ 2,312	$ 2,312
Goodwill, Impairment Loss			$ 0
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Gross, Total	$ 7,490	$ 7,490	7,490
Finite-Lived Intangible Assets, Accumulated Amortization	(2,739)	(2,033)	(2,033)
Finite-Lived Intangible Assets, Net, Beginning Balance	4,751	5,457	5,457
Amortization	(177)	(176)	(706)
Finite-Lived Intangible Assets, Gross, Total	7,490		7,490
Finite-Lived Intangible Assets, Accumulated Amortization	(2,916)		(2,739)
Finite-Lived Intangible Assets, Net, Ending Balance	4,574		4,751
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2021				514
2022				691
2023				691
2024				621
2025				525
Thereafter				1,532
Total	$ 4,751	$ 5,457	$ 5,457	4,574	4,751
Anchor Bancorp
Finite-Lived Intangible Assets, Net [Abstract]
Amortization period - CDI	10 years
Bank of America
Finite-Lived Intangible Assets [Line Items]
Goodwill				$ 2,300	$ 2,300
Finite-Lived Intangible Assets, Net [Abstract]
Amortization period - CDI	9 years

Revenue From Contracts With C_3

Revenue From Contracts With Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Noninterest Income
Noninterest Income (in-scope of Topic 606)	$ 688	$ 701
Noninterest income (out-of-scope of Topic 606)	12,346	8,190
Total noninterest income	13,034	8,891
Debit Card Interchange Fees
Noninterest Income
Noninterest Income (in-scope of Topic 606)	515	435
Deposit service and account maintenance fees
Noninterest Income
Noninterest Income (in-scope of Topic 606)	$ 173	$ 266