FS Bancorp (FSBW) 10-K 16 Mar 20 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 06, 2020	Jun. 30, 2019
Document And Entity Information
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Entity Registrant Name	FS BANCORP, INC.
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
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		4,461,041
Entity Public Float			$ 217,316,990
Entity Central Index Key	0001530249
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 13,175	$ 9,408
Interest-bearing deposits at other financial institutions	32,603	23,371
Total cash and cash equivalents	45,778	32,779
Certificates of deposit at other financial institutions	20,902	22,074
Securities available-for-sale, at fair value	126,057	97,205
Loans held for sale, at fair value	69,699	51,195
Loans receivable, net	1,336,346	1,312,519
Accrued interest receivable	5,908	5,761
Premises and equipment, net	28,770	29,110
Operating lease right-of-use ("ROU") assets	5,016
Federal Home Loan Bank ("FHLB") stock, at cost	8,045	9,887
Other real estate owned ("OREO")	168	689
Bank owned life insurance ("BOLI"), net	35,356	34,485
Servicing rights, held at the lower of cost or fair value	11,560	10,429
Goodwill	2,312	2,312
Core deposit intangible, net	5,457	6,217
Other assets	11,682	6,982
TOTAL ASSETS	1,713,056	1,621,644
LIABILITIES
Noninterest-bearing accounts	273,602	234,532
Interest-bearing accounts	1,118,806	1,039,687
Total deposits	1,392,408	1,274,219
Borrowings	84,864	137,149
Principal amount	10,000	10,000
Unamortized debt issuance costs	(115)	(135)
Total subordinated note less unamortized debt issuance costs	9,885	9,865
Operating lease liabilities	5,214
Deferred tax liability, net	1,971	361
Other liabilities	18,472	20,012
Total liabilities	1,512,814	1,441,606
COMMITMENTS AND CONTINGENCIES (NOTE 10)
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; 4,459,041 and 4,492,478 shares issued and outstanding at December 31, 2019 and December 31, 2018, respectively	44	45
Additional paid-in capital	89,268	91,466
Retained earnings	110,715	90,854
Accumulated other comprehensive income (loss), net of tax	788	(1,479)
Unearned shares - Employee Stock Ownership Plan ("ESOP")	(573)	(848)
Total stockholders' equity	200,242	180,038
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,713,056	$ 1,621,644

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Items Included in Consolidated Statement of Financial Condition [Abstract]
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	4,459,041	4,492,478
Common stock, shares outstanding	4,459,041	4,492,478

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
INTEREST INCOME
Loans receivable, including fees	$ 84,706,000	$ 58,616,000
Interest and dividends on investment securities, cash and cash equivalents, and certificates of deposit at other financial institutions	4,919,000	3,710,000
Total interest and dividend income	89,625,000	62,326,000
INTEREST EXPENSE
Deposits	16,162,000	7,321,000
Borrowings	2,476,000	2,228,000
Subordinated note	679,000	679,000
Total interest expense	19,317,000	10,228,000
NET INTEREST INCOME	70,308,000	52,098,000
PROVISION FOR LOAN LOSSES	2,880,000	1,540,000
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	67,428,000	50,558,000
NONINTEREST INCOME
Service charges and fee income	6,554,000	3,233,000
Bargain purchase gain		7,414,000
Gain on sale of loans	14,248,000	14,861,000
Loss on disposed fixed assets	(26,000)	(71,000)
Gain on sale of investment securities	32,000	171,000
Earnings on cash surrender value of BOLI	872,000	413,000
Other noninterest income	1,355,000	829,000
Total noninterest income	23,035,000	26,850,000
NONINTEREST EXPENSE
Salaries and benefits	33,816,000	28,538,000
Operations	9,722,000	6,709,000
Occupancy	4,640,000	3,042,000
Data processing	4,972,000	2,870,000
Gain on sale of OREO	(138,000)
OREO expenses	13,000	2,000
Loan costs	3,238,000	2,801,000
Professional and board fees	2,426,000	1,872,000
Federal Deposit Insurance Corporation ("FDIC") insurance	358,000	517,000
Marketing and advertising	678,000	747,000
Acquisition costs	1,756,000	1,389,000
Amortization of core deposit intangible	760,000	351,000
Impairment of servicing rights	92,000
Total noninterest expense	62,333,000	48,838,000
INCOME BEFORE PROVISION FOR INCOME TAXES	28,130,000	28,570,000
PROVISION FOR INCOME TAXES	5,413,000	4,223,000
NET INCOME	$ 22,717,000	$ 24,347,000
Basic earnings per share (in dollars per share)	$ 5.13	$ 6.58
Diluted earnings per share (in dollars per share)	$ 5.01	$ 6.29

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net Income	$ 22,717	$ 24,347
Securities available-for-sale:
Unrealized holding gain (loss) during year	2,920	(1,108)
Income tax (provision) benefit related to unrealized holding gain (loss)	(628)	238
Reclassification adjustment for realized gains, net included in net income	(32)	(171)
Income tax provision related to reclassification for realized gains, net	7	37
Other comprehensive income (loss), net of tax	2,267	(1,004)
COMPREHENSIVE INCOME	$ 24,984	$ 23,343

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income, Net of Tax	Unearned ESOP Shares	Total
Beginning balance at Dec. 31, 2017	$ 37	$ 55,135	$ 68,422	$ (475)	$ (1,117)	$ 122,002
Beginning Balance (in shares) at Dec. 31, 2017	3,680,152
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			24,347			24,347
Dividends paid ($0.53 and $0.65 per share for 2018 and 2019, respectively)			(1,915)			(1,915)
Share-based compensation		767				767
Restricted stock awards (in shares)	25,000
Common stock issued	$ 7	33,759				33,766
Common stock issued (in shares)	725,518
Common stock repurchased for employee/director taxes paid on restricted stock awards		(251)				(251)
Common stock repurchased for employee/director taxes paid on restricted stock awards (in shares)	(4,325)
Stock options exercised	$ 1	1,116				1,117
Stock options shares exercised (in shares)	66,133
Other comprehensive income (loss), net of tax				(1,004)		(1,004)
ESOP shares allocated		940			269	1,209
Ending balance at Dec. 31, 2018	$ 45	91,466	90,854	(1,479)	(848)	180,038
Ending Balance (in shares) at Dec. 31, 2018	4,492,478
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			22,717			22,717
Dividends paid ($0.53 and $0.65 per share for 2018 and 2019, respectively)			(2,856)			(2,856)
Share-based compensation		869				869
Restricted stock awards (in shares)	20,215
Common stock repurchased for employee/director taxes paid on restricted stock awards		(204)				(204)
Common stock repurchased for employee/director taxes paid on restricted stock awards (in shares)	(4,037)
Common stock repurchased	$ (1)	(4,799)				(4,800)
Common stock repurchased (in shares)	(102,384)
Stock options exercised		705				705
Stock options shares exercised (in shares)	52,769
Other comprehensive income (loss), net of tax				2,267		2,267
ESOP shares allocated		1,231			275	1,506
Ending balance at Dec. 31, 2019	$ 44	$ 89,268	$ 110,715	$ 788	$ (573)	$ 200,242
Ending Balance (in shares) at Dec. 31, 2019	4,459,041

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Dividends paid (in dollars per share)	$ 0.65	$ 0.53

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 22,717	$ 24,347
Adjustments to reconcile net income to net cash from operating activities
Provision for loan losses	2,880	1,540
Depreciation, amortization and accretion	12,003	5,263
Compensation expense related to stock options and restricted stock awards	869	767
ESOP compensation expense for allocated shares	1,506	1,209
Provision for deferred income taxes	988	768
Increase in cash surrender value of BOLI	(872)	(413)
Bargain purchase gain		(7,414)
Gain on sale of loans held for sale	(14,126)	(14,654)
Gain on sale of portfolio loans	(122)	(207)
Gain on sale of investment securities	(32)	(171)
Loss on disposed fixed assets	26	71
Origination of loans held for sale	(804,619)	(619,632)
Proceeds from sale of loans held for sale	795,184	631,309
Impairment of servicing rights	92
Gain on sale of OREO	(138)
Changes in operating assets and liabilities
Accrued interest receivable	(147)	(2,156)
Other assets	(4,589)	2,862
Other liabilities	(2,443)	(2,052)
Net cash from operating activities	9,177	21,437
Activity in securities available-for-sale:
Proceeds from sale of investment securities	10,554	24,312
Maturities, prepayments, and calls	24,293	10,243
Purchases	(61,282)	(31,309)
Maturities of certificates of deposit at other financial institutions	3,650	992
Purchase of certificates of deposit at other financial institutions	(2,480)	(4,960)
Loan originations and principal collections, net	(36,904)	(190,125)
Purchase of portfolio loans	(1,799)	(24,007)
Proceeds from sale of portfolio loans	8,487	17,952
Proceeds from sale of OREO, net	901
Purchase of premises and equipment, net	(2,463)	(3,796)
Purchase of BOLI	0	(3,000)
Change in FHLB stock, net	1,842	(7,016)
Net cash acquired from Anchor Acquisition		23,753
Net cash used by investing activities	(55,201)	(186,961)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	118,714	87,566
Proceeds from borrowings	401,447	917,239
Repayments of borrowings	(453,983)	(824,368)
Dividends paid on common stock	(2,856)	(1,915)
Proceeds from stock options exercised	705	1,117
Common stock repurchased for employee/director taxes paid on restricted stock awards	(204)	(251)
Common stock repurchased	(4,800)
Net cash (used by) from financing activities	59,023	179,388
NET INCREASE IN CASH AND CASH EQUIVALENTS	12,999	13,864
CASH AND CASH EQUIVALENTS, beginning of year	32,779	18,915
CASH AND CASH EQUIVALENTS, end of year	45,778	32,779
Cash paid during the year for:
Interest on deposits and borrowings	18,709	10,098
Income taxes	4,351	2,902
Anchor acquisition:
Assets acquired, excluding cash acquired		420,305
Liabilities assumed		402,878
SUPPLEMENTARY DISCLOSURES OF NONCASH OPERATING, INVESTING AND FINANCING ACTIVITIES
Change in unrealized gain (loss) on investment securities, net	2,888	(1,279)
Property taken in settlement of loans	312
Retention of gross mortgage servicing rights from loan sales	5,400	5,971
Additional paid-in-capital from common stock issued		$ 33,766
Right-of-use assets in exchange for lease liabilities	$ 6,232

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	NOTE 1 - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations - FS Bancorp, Inc. (the “Company”) was incorporated in September 2011 as the holding company for 1st Security Bank of Washington (the “Bank” or “1st Security Bank”) in connection with the Bank’s conversion from the mutual to stock form of ownership which was completed on July 9, 2012. The Bank is a community-based savings bank with 21 full-service bank branches, a headquarte rs that accepts deposits, and seven home loan production offices in suburban communities in the greater Puget Sound area which includes Snohomish, King, Pierce, Jefferson, Kitsap, Clallam, Grays Harbor, Thurston, and Lewis counties, and one home loan production office in the market area of the Tri-Cities, Washington. The Bank provides loan and deposit services to customers who are predominantly small- and middle-market businesses and individuals. The Company and its subsidiary are subject to regulation by certain federal and state agencies and undergo periodic examination by these regulatory agencies. On November 15, 2018, the Company completed its acquisition of Anchor Bancorp (“Anchor”), pursuant to the Agreement and Plan of Merger dated as of July 17, 2018 (the “Merger Agreement”) by and between FS Bancorp and Anchor. Under the terms of the Merger Agreement, Anchor merged with and into FS Bancorp (“Anchor Acquisition”), with FS Bancorp as the surviving corporation. Immediately after the Anchor Acquisition, FS Bancorp merged Anchor Bank, a wholly-owned subsidiary of Anchor, with and into 1st Security Bank of Washington, a wholly-owned subsidiary of FS Bancorp, with 1st Security Bank of Washington as the surviving bank. For additional information, see “Note 2 - Business Combination.” Financial Statement Presentation - The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) and with prevailing practices within the banking and securities industries. In preparing such financial statements, management is required to make certain estimates and judgments that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the balance sheet and the reported amounts of revenues and expenses for the reporting period. Actual results could differ significantly from those 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 - The consolidated financial statements include the accounts of FS Bancorp, Inc. and its wholly owned subsidiary, 1st Security Bank of Washington. All material intercompany accounts have been eliminated in consolidation. Segment Reporting - The Company operates in two business segments through the Bank: commercial and consumer banking and home lending. 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 regularly reviewed for the purpose of allocating resources and evaluating performance of the Company’s businesses. The results for these business segments are based on management’s accounting process, which assigns income statement items and assets to each responsible operating segment. This process is dynamic and is based on management’s view of the Company’s operations. See “Note 20 - Business Segments.” Subsequent Events - The Company has evaluated events and transactions subsequent to December 31, 2019 for potential recognition or disclosure. Cash and Cash Equivalents - Cash and cash equivalents include cash and due from banks, and interest-bearing balances due from other banks and the Federal Reserve Bank of San Francisco (“FRB”) and have an original maturity of 90 days or less at the time of purchase. At times, cash balances may exceed Federal Deposit Insurance Corporation (“FDIC”) insured limits. At December 31, 2019 and 2018, the Company had $8.6 million and $25,000, respectively, of cash and due from banks and interest-bearing deposits at other financial institutions in excess of FDIC insured limits. Securities Available-for-Sale - Securities available-for-sale consist of debt securities that the Company has the intent and ability to hold for an indefinite period, but not necessarily to maturity. Such securities may be sold to implement the Company’s asset/liability management strategies and in response to changes in interest rates and similar factors. Securities available-for-sale are reported at fair value. Realized gains and losses on securities available-for-sale, determined using the specific identification method, are included in results of operations. Amortization of premiums and accretion of discounts are recognized as adjustments to yield over the contractual lives of the related securities with the exception of premiums for non-contingently callable debt securities which are amortized to the earliest call date, rather than the contractual maturity date. Unrealized holding gains and losses, net of the related deferred tax effect, are reported as a net amount in a separate component of equity entitled accumulated other comprehensive income (loss). Unrealized losses that are deemed to be other than temporary are reflected in results of operations. Any declines in the values of these securities that are considered to be other-than-temporary-impairment (“OTTI”) and credit-related are recognized in earnings. Noncredit-related OTTI on securities not expected to be sold is recognized in other comprehensive income (loss). The review for OTTI is conducted on an ongoing basis and takes into account the severity and duration of the impairment, recent events specific to the issuer or industry, fair value in relationship to cost, extent and nature of change in fair value, creditworthiness of the issuer including external credit ratings and recent downgrades, trends and volatility of earnings, current analysts’ evaluations, and other key measures. In addition, the Company does not intend to sell the securities and it is more likely than not that we will not be required to sell the securities before recovery of their amortized cost basis. In doing this, we take into account our balance sheet management strategy and consideration of current and future market conditions. Dividends and interest income are recognized when earned. Federal Home Loan Bank Stock - The Bank’s investment in FHLB stock is carried at cost, which approximates fair value. As a member of the FHLB system, the Bank is required to maintain an investment in capital stock of the FHLB in an amount of $1.9 million and 4.0% of advances from the FHLB. The Bank’s required minimum level of investment in FHLB stock is based on specific percentages of its outstanding mortgages, total assets, or FHLB advances. At December 31, 2019 and 2018, the Bank’s minimum level of investment requirement in FHLB stock was $8.0 million and $9.9 million, respectively. The Bank was in compliance with the FHLB minimum investment requirement at December 31, 2019 and 2018. Management evaluates FHLB stock for impairment as needed. Management’s determination of whether these investments are impaired is based on its assessment of the ultimate recoverability of cost rather than by recognizing temporary declines in value. The determination of whether a decline affects the ultimate recoverability of cost is influenced by criteria such as (1) the significance of any decline in net assets of the FHLB as compared with the capital stock amount for the FHLB and the length of time this situation has persisted; (2) commitments by the FHLB to make payments required by law or regulation and the level of such payments in relation to the operating performance of the FHLB; (3) the impact of legislative and regulatory changes on institutions and, accordingly, the customer base of the FHLB; and (4) the liquidity position of the FHLB. Based on its evaluation, management determined that there was no impairment of FHLB stock at December 31, 2019 and 2018, respectively. Loans Held for Sale - The Bank records all mortgage loans held-for-sale at fair value. Fair value is determined by outstanding commitments from investors or current investor yield requirements calculated on the aggregate loan basis. Gains and losses on fair value changes of loans held for sale are recorded in the gain on sale of loans component of non-interest income. Origination fees and costs are recognized in earnings at the time of origination. Mortgage loans held for sale are sold with the mortgage service rights either released or retained by the Bank. Gains or losses on sales of mortgage loans are recognized based on the difference between the selling price and the carrying value of the related mortgage loans sold. All sales are made with limited recourse against the Company. Other Real Estate Owned - Other real estate owned (“OREO”) consists of properties or assets acquired through or in lieu of foreclosure, and are recorded initially at fair value less selling costs, with the initial charge made to the allowance for loan losses. Costs relating to development and improvement of the properties or assets are capitalized while costs relating to holding the properties or assets are expensed. Valuations are periodically performed by management, and a charge to earnings is recorded if the recorded value of a property exceeds its estimated net realizable value. Derivatives - Commitments to fund mortgage loans (interest rate locks) to be sold into the secondary market and forward commitments for the future delivery of these mortgage loans are accounted for as free-standing derivatives. The fair value of the interest rate lock is recorded at the time the commitment to fund the mortgage loan is executed and is adjusted for the expected exercise of the commitments to fund the loans, the Company enters into forward commitments for the future delivery of mortgage loans when interest rate locks are entered. Fair values of these mortgage derivatives are estimated based on changes in mortgage interest rates from the date the interest on the loan is locked. Changes in the fair values of these derivatives are reported in “Gain on sale of loans” on the Consolidated Statements of Income. Loans Receivable - Loans receivable, are stated at the amount of unpaid principal reduced by an allowance for loan losses and net deferred fees or costs. Interest on loans is calculated using the simple interest method based on the daily balance of the principal amount outstanding and is credited to income as earned. Loan fees, net of direct origination costs, are deferred and amortized over the life of the loan using the effective yield method. If the loan is repaid prior to maturity, the remaining unamortized net deferred loan origination fee is recognized in income at the time of repayment. Interest on loans is accrued daily based on the principal amount outstanding. Generally, the accrual of interest on loans is discontinued when, in management’s opinion, the borrower may be unable to meet payments as they become due or when they are past due 90 days as to either principal or interest (based on contractual terms), unless they are well secured and in the process of collection. All interest accrued but not collected for loans that are placed on non-accrual status or charged off are reversed against interest income. Subsequent collections on a cash basis are applied proportionately to past due principal and interest, unless collectability of principal is in doubt, in which case all payments are applied to principal. Loans are returned to accrual status when the loan is performing according to its contractual terms for at least six months and the collectability of principal and interest is no longer doubtful. Impaired Loans - A loan is considered impaired when it is probable the Company will be unable to collect all contractual principal and interest payments due in accordance with the original or modified terms of the loan agreement. Impaired loans are measured on a loan by loan basis based on the estimated fair value of the collateral less estimated cost to sell if the loan is considered collateral dependent. Impaired loans not considered to be collateral dependent are measured based on the present value of expected future cash flows. Regular credit reviews of the portfolio also identify loans that are considered potentially impaired except for the smaller groups of homogeneous consumer loans. The categories of non-accrual loans and impaired loans overlap, although they are not coextensive. The Company considers all circumstances regarding the loan and borrower on an individual basis when determining whether an impaired loan should be placed on non-accrual status, such as the financial strength of the borrower, the collateral value, reasons for delay, payment record, the amount of past due and the number of days past due. Loans that experience insignificant payment delays and payment shortfalls are generally not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of shortfall in relation to the principal and interest owed. Troubled Debt Restructured Loans - Troubled debt restructured (“TDR”) loans are loans for which the Company, for economic or legal reasons related to the borrower’s financial condition, has granted a significant concession to the borrower that it would otherwise not consider. The loan terms which have been modified or restructured due to a borrower’s financial difficulty include but are not limited to: a reduction in the stated interest rate; an extension of the maturity at an interest rate below current market; a reduction in the face amount of the debt; a reduction in the accrued interest; or re-aging, extensions, deferrals and renewals. TDR loans are considered impaired loans and are individually evaluated for impairment and can be classified as either accrual or non-accrual. TDR loans are classified as non-performing loans unless they have been performing in accordance with their modified terms for a period of at least six months in which case they are placed on accrual status. Allowance for Loan Losses (“ALLL”) - The ALLL is maintained at a level considered adequate to provide for probable losses on existing loans based on evaluating known and inherent risks in the loan portfolio. The allowance is reduced by loans charged off and increased by provisions charged to earnings and recoveries on loans previously charged-off. The allowance is based on management’s periodic, and systematic evaluation of factors underlying the quality of the loan portfolio including changes in the size and composition of the loan portfolio, the estimated value of any underlying collateral, actual loan loss experience, current economic conditions, and detailed analysis of individual loans for which full collectability may not be assured. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. While management uses the best information available to make its estimates, future adjustments to the allowance may be necessary if there is a significant change in economic and other conditions. The appropriateness of the ALLL is estimated based on these factors and trends identified by management at the time the financial statements are prepared. When available information confirms that specific loans or portions thereof are uncollectible, these amounts are charged-off against the ALLL. The existence of some or all of the following criteria will generally confirm that a loss has been incurred: the loan is significantly delinquent and the borrower has not evidenced the ability or intent to bring the loan current; the Company has no recourse to the borrower, or if it does, the borrower has insufficient assets to pay the debt; the estimated fair value of the loan collateral is significantly below the current loan balance, and there is little or no near-term prospect for improvement. A provision for loan losses is charged against income and added to the ALLL based on regular assessment of the loan portfolio. The ALLL is allocated to certain loan categories based on the relative risk characteristics, asset classifications, and actual loss experience within the loan portfolio. Although management has allocated the ALLL to various loan portfolio segments, the allowance is general in nature and is available for the loan portfolio in its entirety. The ultimate recovery of all loans is susceptible to future market factors beyond the Company’s control. These factors may result in losses or recoveries differing significantly from those provided for in the financial statements. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company’s ALLL, and may require the Company to make additions to the allowance based on their judgment about information available to them at the time of their examinations. Reserve for Unfunded Loan Commitments - The reserve for unfunded loan commitments is maintained at a level believed by management to be sufficient to absorb estimated probable losses related to these unfunded credit facilities. The determination of the adequacy of the reserve is based on periodic evaluations of the unfunded credit facilities including an assessment of the probability of commitment usage, credit risk factors for loans outstanding to these same customers, and the terms and expiration dates of the unfunded credit facilities. The reserve for unfunded loan commitments is included in other liabilities on the consolidated balance sheet, with changes to the balance charged against noninterest expense. Premises and Equipment, Net - Land is carried at cost. Premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. The estimated useful lives used to compute depreciation include building and building improvements from 25 to 40 years and furniture, fixtures, and equipment from 3 to 10 years. Leasehold and tenant improvements are amortized using the straight-line method over the lesser of useful life or the life of the related lease. Gains or losses on dispositions are reflected in Consolidated Statements of Income. Management reviews buildings, improvements and equipment for impairment on an annual basis or whenever events or changes in the circumstances indicate that the undiscounted cash flows for the property are less than its carrying value. If identified, an impairment loss is recognized through a charge to earnings based on the fair value of the property. Transfers of Financial Assets - Transfers of an entire financial asset, a group of entire financial assets, or participating interest in an entire financial asset are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Servicing Rights - Servicing assets are recognized as separate assets when rights are acquired through purchase or through sale of financial assets. Generally, purchased servicing rights are capitalized at the cost to acquire the rights. For sales of mortgage, commercial and consumer loans, a portion of the cost of originating the loan is allocated to the servicing right based on relative fair value. Fair value is based on market prices for comparable mortgage, commercial, or consumer servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income, such as the cost to service, the discount rate, the custodial earnings rate, an inflation rate, ancillary income, prepayment speeds, and default rates and losses. Servicing assets are evaluated quarterly for impairment based upon the fair value of the rights as compared to amortized cost. Impairment is determined by stratifying rights into tranches based on predominant characteristics, such as interest rate, loan type, and investor type. Impairment is recognized through a valuation allowance for an individual tranche, to the extent that fair value is less than the capitalized amount for the tranche. If the Company later determines that all or a portion of the impairment no longer exists for a particular tranche, a reduction of the allowance may be recorded as an increase to income. Capitalized servicing rights are stated separately on the Consolidated Balance Sheets and are amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Income Taxes - The Company files a consolidated federal income tax return. Deferred federal income taxes result from temporary differences between the tax basis of assets and liabilities, and their reported amounts in the financial statements. These will result in differences between income for tax purposes and income for financial reporting purposes in future years. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. Valuation allowances are established to reduce the net recorded amount of deferred tax assets if it is determined to be more likely than not, that all or some portion of the potential deferred tax asset will not be realized. The Company follows the authoritative guidance issued related to accounting for uncertainty in income taxes. The guidance prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. It is the Company’s policy to record any penalties or interest arising from federal or state taxes as a component of income tax expense. Employee Stock Ownership Plan - Compensation expense recognized for the Company’s ESOP equals the fair value of shares that have been allocated or committed to be released for allocation to participants. Any difference between the fair value of the shares at the time and the ESOP’s original acquisition cost is charged or credited to stockholders’ equity (additional paid-in capital). The cost of ESOP shares that have not yet been allocated or committed to be released is deducted from stockholders’ equity. Earnings Per Share (“EPS”) - Basic EPS are computed by dividing income available to common stockholders by the weighted average number of common shares outstanding for the period. 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 purposes of computing basic and dilutive EPS, ESOP shares that have been committed to be released are outstanding and ESOP shares that have not been committed to be released shall not be considered outstanding. Comprehensive Income (Loss) - Comprehensive income (loss) is comprised of net income and other comprehensive income (loss). Other comprehensive income (loss) includes unrealized holding gains and losses on securities available-for-sale, net of tax recorded directly to equity. Financial Instruments - In the ordinary course of business, the Company has entered into agreements for off-balance-sheet financial instruments consisting of commitments to extend credit and stand-by letters of credit. Such financial instruments are recorded in the financial statements when they are funded or related fees are incurred or received. Restricted Assets - Regulations of the Board of Governors of the Federal Reserve System (“Federal Reserve”) require that the Bank maintain reserves in the form of cash on hand and deposit balances with the FRB, based on a percentage of deposits. The amounts of such balances for the years ended December 31, 2019 and 2018 were $0.0 and $17.4 million, respectively, included in interest-bearing deposits at other financial institutions on the Consolidated Balance Sheets. Marketing and Advertising Costs - The Company records marketing and advertising costs as expenses as they are incurred. Total marketing and advertising expense was $678,000 and $747,000 for the years ended December 31, 2019 and 2018, respectively. Stock-Based Compensation - Compensation cost is recognized for stock options and restricted stock awards, based on the fair value of these awards at the grant date. A Black-Scholes model is utilized to estimate the fair value of stock options, while the market price of the Company’s common stock at the grant date is used for restricted stock awards. Compensation cost is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. Goodwill - Goodwill is recorded upon completion of a business combination as the difference between the purchase price and the fair value of net identifiable assets acquired. Goodwill was not recorded until the first quarter of 2016 in recognition of the four retail branches purchased from Bank of America on January 22, 2016. The Company completes its annual review of goodwill during the fourth quarter of each fiscal year. An assessment of qualitative factors is completed to determine if it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the qualitative analysis concludes that further analysis is required, then a quantitative impairment test would be completed. The quantitative goodwill impairment test is used to identify the existence of impairment and the amount of impairment loss and compares the reporting unit’s estimated fair value, including goodwill, to its carrying amount. If the fair value exceeds the carrying amount then goodwill is not considered impaired. If the carrying amount exceeds its fair value, an impairment loss would be recognized equal to the amount of excess, limited to the amount of total goodwill allocated to that reporting unit. There was no goodwill impairment at December 31, 2019 or 2018. Business Combinations - The Company accounts for business combinations using the acquisition method of accounting. The accounts of an acquired entity are included as of the date of acquisition, and any excess of purchase price over the fair value of the net assets acquired is capitalized as goodwill. In the event that the fair value of net assets acquired exceeds the purchase price, including fair value of liabilities assumed, a bargain purchase gain is recorded on that acquisition. Under this method, all identifiable assets acquired, including purchased loans, and liabilities assumed are recorded at fair value. The Company typically issues common stock and/or pays cash for an acquisition, depending on the terms of the acquisition agreement. The value of shares of common stock issued is determined based on the market price of the stock as of the closing of the acquisition. Acquired Loans - Acquired loans are recorded at their initial fair value and adjusted for subsequent advances, pay downs, amortization or accretion of any premium or discount on purchase, charge-offs and additional provisioning that may be required. Application of New Accounting Guidance in 2019 On January 1, 2019, the Company adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2016‑02, Leases (Topic 842) . ASU No. 2016‑02 requires lessees to recognize on the balance sheet the assets and liabilities arising from operating leases. A lessee should recognize a liability to make lease payments and an ROU asset representing its right to use the underlying asset for the lease term. A lessee should include payments to be made in an optional period only if the lessee is reasonably certain to exercise an option to extend the lease or not to exercise an option to terminate the lease. For operating leases, the lease cost should be allocated over the lease term on a generally straight-line basis. In July 2018, the FASB issued ASU No, 2018-10, Codification Improvements to Topic 842, Leases and ASU No. 2018-11, Leases (Topic 842): Targeted Improvements . These ASUs contain clarifications to ASU 2016-02, including providing a new transition method in addition to the existing transition method contained in ASU No. 2016-02 to allow entities to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. These amendments have the same effective date as ASU 2016-02. In March 2019, FASB issued ASU 2019-01, Leases (Topic 842), Codification Improvements . The amendment in this ASU that is applicable to the Company clarifies interim disclosure requirements that allow omission of required transition disclosures. For financial reporting purposes, the Company applied the modified retrospective transition approach and elected to apply the transition option included in ASU 2018-11 on the effective date, January 1, 2019, which eliminates the requirement for reporting comparative periods presented in the financial statements prior to that date. The new standard provides for a number of practical expedients in transition. The Company elected the package of practical expedients, which permits us to not reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The Company also elected the use-of-hindsight and elected the practical expedient to not separate lease and non-lease components on our real estate leases where we are the lessee. The Company did not elect the practical expedient pertaining to land easement as it is not applicable to us. The new standard also provides practical expedients for an entity's ongoing accounting. The Company has elected the short-term lease recognition exemption for certain leases which are less than 12 months in duration or month-to-month. This means, for those leases that qualify, ROU assets or lease liabilities will not be recognized. The adoption of this ASU on January 1, 2019 created ROU assets of $5 .1 million and operating lease liabilities of $5.2 million, and the related impact to the Company’s first quarter 2019 Consolidated Balance Sheet was approximately 0.3% of total assets. Additional disclosures required by the ASU have been included in “Note 7 - Leases.” RECENT ACCOUNTING PRONOUNCEMENTS In June 2016, the FASB issued 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. The ASU is intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations. The ASU requires the recognition and measurement of all current expected credit losses (“CECL”) for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and support

Business Combination

Business Combination	12 Months Ended
	Dec. 31, 2019
Business Combination [Abstract]
Business Combination	NOTE 2 - BUSINESS COMBINATION On November 15, 2018, the Company completed its acquisition of Anchor Bancorp, pursuant to the Agreement and Plan of Merger dated as of July 17, 2018 by and between FS Bancorp and Anchor. Under the terms of the Merger Agreement, Anchor merged with and into FS Bancorp, with FS Bancorp as the surviving corporation. Immediately after the Anchor Acquisition, FS Bancorp merged Anchor Bank, a wholly-owned subsidiary of Anchor, with and into 1st Security Bank of Washington, a wholly-owned subsidiary of FS Bancorp, with 1st Security Bank of Washington as the surviving bank. Anchor’s principal business activities prior to the acquisition were attracting retail deposits from the general public and utilizing those deposits to originate loans including one-to-four-family residences, commercial real estate, and multi-family residences located in Western Washington. Anchor’s principal lending activity had consisted of the origination of loans secured by first mortgages on owner-occupied, one-to-four-family residences and loans for the construction of one-to-four-family residences, as well as consumer loans, with an emphasis on home equity loans and lines of credit. The primary objective for the acquisition was to significantly expand FS Bancorp’s presence throughout Western Washington, increase nonmaturity deposits, and offer additional banking and lending products to former Anchor customers as well as new customers. The Anchor Acquisition was accounted for under the acquisition method of accounting and accordingly, the assets and liabilities were recorded at their fair values on November 15, 2018, the date of acquisition. Determining the fair value of assets and liabilities is a complicated process involving significant judgment regarding methods and assumptions used to calculate estimated fair values. For the years ended December 31, 2019 and 2018, there were no refinements to the fair value of these assets acquired and liabilities assumed. The following table summarizes the estimated fair values of assets acquired and liabilities assumed at the date of acquisition: Acquired Book Fair Value Amount November 15, 2018 Value Adjustments Recorded Assets Cash and cash equivalents $ 54,558 $ — $ 54,558 Securities available-for-sale 19,609 (54) 19,555 Loans receivable, net 361,596 (5,321) (1) 356,275 Premises and equipment, net 8,411 3,354 (2) 11,765 Other real estate owned 689 — 689 Deferred tax asset 4,097 (3,358) 739 Mortgage servicing rights 218 564 782 Core deposit intangible ("CDI") — 5,251 (3) 5,251 Other assets 25,231 18 25,249 Total assets acquired $ 474,409 $ 454 $ 474,863 Liabilities Deposits $ 357,863 $ (1,052) (4) $ 356,811 Borrowings 37,000 (282) 36,718 Other liabilities 9,286 63 9,349 Total liabilities assumed $ 404,149 $ (1,271) $ 402,878 Explanation of Fair Value Adjustments (1) The fair value discount for acquired loans from Anchor was $5.3 million and was determined by separate adjustments to reflect a credit risk and marketability component and a yield component reflecting the differential between portfolio and market yields. The discount on acquired loans will be accreted back into interest income using the effective yield method. (2) The fair value adjustment represents the difference between the fair value of the premises and the book value of those assets acquired. The Company utilized third-party valuations including appraisals, comparative market analysis, and tax-assessed values to assist in the determination of the fair value. (3) The fair value adjustment of $5.3 million represents the value of the core deposit base assumed. This amount was recorded by the Company as an identifiable intangible asset and will be amortized as an expense on a straight-line basis over an estimated 10 year life of the core deposit base and will be reviewed for impairment annually. See “Note 22- Goodwill and Other Intangible Assets.” (4) The fair value of transaction and savings accounts was determined to be equal to their carrying values. The fair value of time deposits was calculated using a discounted cash flow analysis that calculated the present value of the projected cash flows from the portfolio versus the present value of a similar portfolio with a similar maturity profile at current market rates. As of the acquisition date, the portfolio of time deposits was valued at a pre-tax discount of $1.1 million, or 0.65% of certificates of deposit acquired in the Anchor Acquisition of $162.9 million. This adjustment represents a difference in interest rates from the time deposits acquired and the estimated wholesale funding rates used in the application of fair value accounting. The discounted amount will be accreted into expense as an increase in interest expense over the maturity profile of the acquired time deposits. The following table summarizes the consideration paid, the aggregate amount recognized for each major class of assets acquired and liabilities assumed by 1st Security Bank in the Anchor Acquisition: At November 15, 2018 Purchase price of Anchor Fair value of FS Bancorp common stock at $46.54 (1) per share for 725,518 shares $ Cash paid Total purchase price Fair value of assets acquired: Cash and cash equivalents $ 54,558 Securities available-for-sale 19,555 Loans receivable, net 356,275 Premises and equipment 11,765 OREO 689 Deferred tax asset 739 Mortgage servicing rights 782 Intangible assets – CDI 5,251 Other assets 25,249 Total assets and identifiable intangible assets acquired $ 474,863 Fair value of liabilities assumed: Deposits $ 356,811 Borrowings 36,718 Other liabilities 9,349 Total liabilities assumed $ 402,878 Fair value of net assets and identifiable intangible assets acquired Bargain purchase gain $ _________________________ (1) Stock price is as of the closing date. The application of the acquisition method of accounting resulted in a bargain purchase gain of $7.4 million for the year ended December 31, 2018 and was reported as a component of noninterest income on our Consolidated Statements of Income. The bargain purchase gain was primarily due to the decline in the value of the stock portion of the merger consideration between signing and closing the Anchor Acquisition which resulted in the purchase price for Anchor being less than the fair market value of the net assets acquired. In the merger, each Anchor shareholder received 0.291 of a share of FS Bancorp common stock for each share of Anchor common stock along with $12.40 in cash. The Company determined that the disclosure requirements related to the amounts of revenues and earnings of Anchor included in the consolidated statements of operations since the November 15, 2018 acquisition date is impracticable. The financial activity and operating results of Anchor were commingled with the Company’s financial activity and operating results as of the acquisition date.

Securities Available-for-sale

Securities Available-for-sale	12 Months Ended
	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Securities Available-for-sale	NOTE 3 - SECURITIES AVAILABLE-FOR-SALE The following tables present the amortized costs, unrealized gains, unrealized losses, and estimated fair values of securities available-for-sale at December 31, 2019 and 2018: December 31, 2019 Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Values SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 8,986 $ 95 $ (15) $ 9,066 Corporate securities 10,525 52 (7) 10,570 Municipal bonds 20,516 604 — 21,120 Mortgage-backed securities 62,745 405 (300) 62,850 U.S. Small Business Administration securities 22,281 191 (21) 22,451 Total securities available-for-sale $ 125,053 $ 1,347 $ (343) $ 126,057 December 31, 2018 Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Values SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 16,052 $ 32 $ (197) $ 15,887 Corporate securities 7,074 — (209) 6,865 Municipal bonds 14,446 23 (275) 14,194 Mortgage-backed securities 45,827 83 (1,074) 44,836 U.S. Small Business Administration securities 15,690 — (267) 15,423 Total securities available-for-sale $ 99,089 $ 138 $ (2,022) $ 97,205 At Decemb er 31, 2019, t he Bank pledged seven securities held at the FHLB of Des Moines with a carrying value of $7.4 million to secure Washington State public deposits of $10.3 million with a $4.0 million collateral requirement by the Washington Public Deposit Protection Commission. At Decemb er 31, 2018, t he Bank pledged 11 securities held at the FHLB of Des Moines with a carrying value of $13.7 million to secure Washington State public deposits of $19.9 million with an $8.4 million minimum collateral requirement by the Washington Public Deposit Protection Commission. Investment securities that were in an unrealized loss position at December 31, 2019 and 2018 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. December 31, 2019 Less than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 2,977 $ (15) $ — $ — $ 2,977 $ (15) Corporate securities 1,993 (7) — — 1,993 (7) Mortgage-backed securities 12,345 (154) 11,459 (146) 23,804 (300) U.S. Small Business Administration securities 4,395 (21) — — 4,395 (21) Total $ 21,710 $ (197) $ 11,459 $ (146) $ 33,169 $ (343) December 31, 2018 Less than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 6,018 $ (25) $ 4,822 $ (172) $ 10,840 $ (197) Corporate securities 975 (25) 5,890 (184) 6,865 (209) Municipal bonds 2,098 (22) 8,787 (253) 10,885 (275) Mortgage-backed securities 6,266 (40) 32,537 (1,034) 38,803 (1,074) U.S. Small Business Administration securities 1,958 (11) 13,465 (256) 15,423 (267) Total $ 17,315 $ (123) $ 65,501 $ (1,899) $ 82,816 $ (2,022) There were 13 investments with unrealized losses of less than one year and 10 investments with unrealized losses of more than one year at December 31, 2019. There were 14 investments with unrealized losses of less than one year and 48 investments with unrealized losses of more than one year at December 31, 2018. The unrealized losses associated with these investments are believed to be caused by changing market conditions that are considered to be temporary and the Company does not intend to sell these securities, and it is not likely to be required to sell these securities prior to maturity. Based on the Company’s evaluation of these securities, no OTTI was recorded for the years ended December 31, 2019 and 2018. The contractual maturities of securities available-for-sale at December 31, 2019 and 2018 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. December 31, 2019 December 31, 2018 Amortized Fair Amortized Fair Cost Value Cost Value U.S. agency securities Due after one year through five years $ 996 $ 1,036 $ 1,043 $ 1,040 Due after five years through ten years 3,997 4,027 10,011 9,941 Due after ten years 3,993 4,003 4,998 4,906 Subtotal 8,986 9,066 16,052 15,887 Corporate securities Due in one year or less 5,034 5,044 — — Due after one year through five years 3,491 3,532 6,077 5,947 Due after five years through ten years 2,000 1,994 997 918 Subtotal 10,525 10,570 7,074 6,865 Municipal bonds Due after one year through five years 3,774 3,833 2,659 2,570 Due after five years through ten years 3,162 3,307 2,610 2,592 Due after ten years 13,580 13,980 9,177 9,032 Subtotal 20,516 21,120 14,446 14,194 Mortgage-backed securities Federal National Mortgage Association (“FNMA”) 42,131 42,333 30,554 30,026 Federal Home Loan Mortgage Corporation (“FHLMC”) 15,250 15,179 10,301 9,961 Government National Mortgage Association (“GNMA”) 5,364 5,338 4,972 4,849 Subtotal 62,745 62,850 45,827 44,836 U.S. Small Business Administration securities Due after one year through five years 1,546 1,555 — — Due after five years through ten years 11,500 11,598 13,828 13,581 Due after ten years 9,235 9,298 1,862 1,842 Subtotal 22,281 22,451 15,690 15,423 Total $ 125,053 $ 126,057 $ 99,089 $ 97,205 The proceeds and resulting gains and losses, computed using specific identification from sales of securities available-for-sale for the years ended December 31, 2019 and 2018 were as follows: December 31, 2019 Proceeds Gross Gains Gross Losses Securities available-for-sale $ 10,554 $ 91 $ (59) December 31, 2018 Proceeds Gross Gains Gross Losses Securities available-for-sale $ 24,312 $ 185 $ (14)

Loans Receivable and Allowance

Loans Receivable and Allowance For Loan Losses	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Loans Receivable and Allowance For Loan Losses	NOTE 4 - LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES The composition of the loan portfolio was as follows at December 31: December 31, December 31, 2019 2018 REAL ESTATE LOANS Commercial $ 210,749 $ 204,699 Construction and development 179,654 247,306 Home equity 38,167 40,258 One-to-four-family (excludes loans held for sale) 261,539 249,397 Multi-family 133,931 104,663 Total real estate loans 824,040 846,323 CONSUMER LOANS Indirect home improvement 210,653 167,793 Solar 44,038 44,433 Marine 67,179 57,822 Other consumer 4,340 5,425 Total consumer loans 326,210 275,473 COMMERCIAL BUSINESS LOANS Commercial and industrial 140,531 138,686 Warehouse lending 61,112 65,756 Total commercial business loans 201,643 204,442 Total loans receivable, gross 1,351,893 1,326,238 Allowance for loan losses (13,229) (12,349) Deferred costs and fees, net (3,273) (2,907) Premiums on purchased loans, net 955 1,537 Total loans receivable, net $ 1,336,346 $ 1,312,519 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. Loans originated by the Company primarily secured by income producing properties, including retail centers, warehouses, and office buildings located in our market areas. Construction and Development Lending . Loans originated by the Company for the construction of, and secured by, commercial real estate, one-to-four-family, and multi-family residences and tracts of land for development that are not pre-sold. A small portion of the one-to-four-family construction portfolio is custom construction loans to the intended occupant of the residence. Home Equity Lending . Loans originated by the Company secured by second mortgages on one-to-four-family residences, including home equity lines of credit in our market areas. One-to-Four-Family Real Estate Lending . One-to-four-family residential loans include owner occupied properties (including second homes), and non-owner occupied properties with four or less units. These loans originated by the Company are secured by first mortgages on one-to-four-family residences in our market areas that the Company intends to hold (excludes loans held for sale). Multi-family Lending . Apartment term lending (five or more units) to current banking customers and community reinvestment loans for low to moderate income individuals in the Company’s footprint. Consumer Loans Indirect Home Improvement . Fixture secured loans for home improvement are originated by the Company through its network of home improvement contractors and dealers and are secured by the personal property installed in, on, or at the borrower’s real property, and may be perfected with a UCC‑2 financing statement filed in the county of the borrower’s residence. These indirect home improvement loans include replacement windows, siding, roofing, pools, and other home fixture installations. Solar. Fixture secured loans for solar related home improvement projects are originated by the Company through its network of contractors and dealers and are secured by the personal property installed in, on, or at the borrower’s real property, and which may be perfected with a UCC‑2 financing statement filed in the county of the borrower’s residence. Marine. Loans originated by the Company, secured by boats, to borrowers primarily located in the states the Company originates consumer loans. Other Consumer. Loans originated by the Company to consumers in our retail branch footprint, including automobiles, recreational vehicles, direct home improvement loans, loans on deposits, and other consumer loans, primarily consisting of personal lines of credit and credit cards. Commercial Business Loans Commercial and Industrial Lending (“C&I”) . Loans originated by the Company to local small- and mid-sized businesses in our Puget Sound market area are secured primarily by accounts receivable, inventory, or personal property, plant and equipment. Some of the C&I loans purchased by the Company are outside of the Greater Puget Sound market area. C&I loans are made on the basis of the borrower’s ability to make repayment from the cash flow of the borrower’s business. Warehouse Lending . Loans originated to non-depository financial institutions and secured by notes originated by the non-depository financial institution. The Company has two distinct warehouse lending divisions: commercial warehouse re-lending secured by notes on construction loans and mortgage warehouse re-lending secured by notes on one-to-four-family loans. The Company’s commercial construction warehouse lines are secured by notes on construction loans and typically guaranteed by principals with experience in construction lending. Mortgage warehouse lending loans are funded through third-party residential mortgage bankers. Under this program, the Company provides short-term funding to the mortgage banking companies for the purpose of originating residential mortgage loans for sale into the secondary market. The following tables detail activity in the allowance for loan losses by loan categories for the years shown: At or For the Year Ended December 31, 2019 Commercial Real Estate Consumer Business Unallocated Total ALLOWANCE FOR LOAN LOSSES Beginning balance $ 5,761 $ 3,351 $ 3,191 $ 46 $ 12,349 Provision (recapture) for loan losses 439 838 1,646 (43) 2,880 Charge-offs (5) (1,040) (1,583) — (2,628) Recoveries 11 617 — — 628 Net recoveries (charge-offs) 6 (423) (1,583) — (2,000) Ending balance $ 6,206 $ 3,766 $ 3,254 $ 3 $ 13,229 Period end amount allocated to: Loans individually evaluated for impairment $ 15 $ 167 $ — $ — $ 182 Loans collectively evaluated for impairment 6,191 3,599 3,254 3 13,047 Ending balance $ 6,206 $ 3,766 $ 3,254 $ 3 $ 13,229 LOANS RECEIVABLE Loans individually evaluated for impairment $ 2,635 $ 493 $ — $ — $ 3,128 Loans collectively evaluated for impairment 821,405 325,717 201,643 — 1,348,765 Ending balance $ 824,040 $ 326,210 $ 201,643 $ — $ 1,351,893 At or For the Year Ended December 31, 2018 Commercial Real Estate Consumer Business Unallocated Total ALLOWANCE FOR LOAN LOSSES Beginning balance $ 4,770 $ 2,814 $ 2,014 $ 1,158 $ 10,756 Provision (recapture) for loan losses 953 526 1,173 (1,112) 1,540 Charge-offs (4) (936) — — (940) Recoveries 42 947 4 — 993 Net recoveries 38 11 4 — 53 Ending balance $ 5,761 $ 3,351 $ 3,191 $ 46 $ 12,349 Period end amount allocated to: Loans individually evaluated for impairment $ 125 $ 150 $ 700 $ — $ 975 Loans collectively evaluated for impairment 5,636 3,201 2,491 46 11,374 Ending balance $ 5,761 $ 3,351 $ 3,191 $ 46 $ 12,349 LOANS RECEIVABLE Loans individually evaluated for impairment $ 834 $ 428 $ 1,685 $ — $ 2,947 Loans collectively evaluated for impairment 845,489 275,045 202,757 — 1,323,291 Ending balance $ 846,323 $ 275,473 $ 204,442 $ — $ 1,326,238 Non-Accrual and Past Due Loans . Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Loans are automatically placed on non-accrual once the loan is 90 days past due or sooner if, in management’s opinion, the borrower may be unable to meet payment obligations as they become due, or as required by regulatory authorities. The exception is the legacy Anchor credit card portfolio which is serviced externally and loans are manually placed on non-accrual once the credit card payment is 90 days past due. The following tables provide information pertaining to the aging analysis of contractually past due loans and non-accrual loans for the years ended December 31, 2019 and 2018: December 31, 2019 30-59 60-89 Days Days 90 Days Total Total Past Past or More Past Loans Non- Due Due Past Due Due Current Receivable Accrual REAL ESTATE LOANS Commercial $ — $ — $ — $ — $ 210,749 $ 210,749 $ 1,086 Construction and development 533 — — 533 179,121 179,654 — Home equity 109 — 185 294 37,873 38,167 190 One-to-four-family 894 114 1,150 2,158 259,381 261,539 1,264 Multi-family — — — — 133,931 133,931 — Total real estate loans 1,536 114 1,335 2,985 821,055 824,040 2,540 CONSUMER LOANS Indirect home improvement 621 187 131 939 209,714 210,653 451 Solar 71 40 16 127 43,911 44,038 17 Marine 15 — — 15 67,164 67,179 — Other consumer 71 2 20 93 4,247 4,340 25 Total consumer loans 778 229 167 1,174 325,036 326,210 493 COMMERCIAL BUSINESS LOANS Commercial and industrial — — — — 140,531 140,531 — Warehouse lending — — — — 61,112 61,112 — Total commercial business loans — — — — 201,643 201,643 — Total loans $ 2,314 $ 343 $ 1,502 $ 4,159 $ 1,347,734 $ 1,351,893 $ 3,033 December 31, 2018 30-59 60-89 Days Days 90 Days Total Total Past Past or More Past Loans Non- Due Due Past Due Due Current Receivable Accrual REAL ESTATE LOANS Commercial $ — $ — $ — $ — $ 204,699 $ 204,699 $ — Construction and development — — — — 247,306 247,306 — Home equity 158 40 229 427 39,831 40,258 229 One-to-four-family 1,274 164 1,358 2,796 246,601 249,397 1,552 Multi-family — — — — 104,663 104,663 — Total real estate loans 1,432 204 1,587 3,223 843,100 846,323 1,781 CONSUMER LOANS Indirect home improvement 438 196 113 747 167,046 167,793 367 Solar 62 43 41 146 44,287 44,433 41 Marine 50 — — 50 57,772 57,822 18 Other consumer 69 24 11 104 5,321 5,425 2 Total consumer loans 619 263 165 1,047 274,426 275,473 428 COMMERCIAL BUSINESS LOANS Commercial and industrial — 431 — 431 138,255 138,686 1,685 Warehouse lending — — — — 65,756 65,756 — Total commercial business loans — 431 — 431 204,011 204,442 1,685 Total loans $ 2,051 $ 898 $ 1,752 $ 4,701 $ 1,321,537 $ 1,326,238 $ 3,894 There were no loans 90 days or more past due and still accruing interest at December 31, 2019, compared to two other consumer loa ns 90 days or more past due of $11,000 and still accruing interest at December 31, 2018. The following tables provide additional information about our impaired loans that have been segregated to reflect loans for which an allowance for loan losses has been provided and loans for which no allowance was provided for the years ended December 31, 2019 and 2018: December 31, 2019 Unpaid Principal Recorded Related WITH NO RELATED ALLOWANCE RECORDED Balance Investment Allowance Real estate loans: Commercial $ 1,097 $ 1,086 $ — Home equity 278 225 — One-to-four-family 1,293 1,264 — Consumer loans: Other consumer 17 17 — 2,685 2,592 — WITH RELATED ALLOWANCE RECORDED Real estate loans: One-to-four-family 61 60 15 Consumer loans: Indirect 451 451 158 Solar 17 17 6 Other consumer 8 8 3 537 536 182 Total $ 3,222 $ 3,128 $ 182 December 31, 2018 Unpaid Principal Recorded Related WITH NO RELATED ALLOWANCE RECORDED Balance Investment Allowance Real estate loans: Home equity $ 305 $ 229 $ — One-to-four-family 991 718 Commercial business loans: Commercial and industrial 431 431 — 1,727 1,378 — WITH RELATED ALLOWANCE RECORDED Real estate loans: One-to-four-family 834 834 125 Consumer loans: Indirect 367 367 128 Solar 41 41 15 Marine 18 18 6 Other consumer 2 2 1 Commercial business loans: Commercial and industrial 1,254 1,254 700 2,516 2,516 975 Total $ 4,243 $ 3,894 $ 975 The following table presents the average recorded investment in loans individually evaluated for impairment and the interest income recognized and received for the years ended December 31, 2019 and 2018: At or For the Year Ended December 31, 2019 December 31, 2018 Average Recorded Interest Income Average Recorded Interest Income Investment Recognized Investment Recognized WITH NO RELATED ALLOWANCE RECORDED Real estate loans: Commercial $ 90 $ 56 $ — $ — Home equity 206 3 404 8 One-to-four-family 1,500 34 719 — Consumer loans: Other consumer 4 2 — — Commercial business loans: Commercial and industrial 180 — 431 22 1,980 95 1,554 30 WITH RELATED ALLOWANCE RECORDED Real estate loans: One-to-four-family 5 5 1,030 28 Consumer loans: Indirect 427 41 295 32 Solar 36 1 31 3 Marine 13 — 11 2 Other consumer 5 1 1 — Commercial business loans: Commercial and industrial 96 — 757 59 582 48 2,125 124 Total $ 2,562 $ 143 $ 3,679 $ 154 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. 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. 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 graded “4” or “5” internally. Loans that are past due more than 90 days are classified “Substandard” 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. 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: December 31, 2019 Special Pass Watch Mention Substandard Doubtful Loss (1 - 5) (6) (7) (8) (9) (10) Total REAL ESTATE LOANS Commercial $ 203,703 $ 2,274 $ 3,686 $ 1,086 $ — $ — $ 210,749 Construction and development 177,109 2,545 — — — — 179,654 Home equity 37,942 — 35 190 — — 38,167 One-to-four-family 259,580 635 60 1,264 — — 261,539 Multi-family 127,792 6,139 — — — — 133,931 Total real estate loans 806,126 11,593 3,781 2,540 — — 824,040 CONSUMER LOANS Indirect home improvement 210,202 — — 451 — — 210,653 Solar 44,021 — — 17 — — 44,038 Marine 67,179 — — — — — 67,179 Other consumer 4,315 — — 25 — — 4,340 Total consumer loans 325,717 — — 493 — — 326,210 COMMERCIAL BUSINESS LOANS Commercial and industrial 125,025 10,435 1,442 3,629 — — 140,531 Warehouse lending 61,112 — — — — — 61,112 Total commercial business loans 186,137 10,435 1,442 3,629 — — 201,643 Total loans receivable, gross $ 1,317,980 $ 22,028 $ 5,223 $ 6,662 $ — $ — $ 1,351,893 December 31, 2018 Special Pass Watch Mention Substandard Doubtful Loss (1 - 5) (6) (7) (8) (9) (10) Total REAL ESTATE LOANS Commercial $ 203,557 $ 1,142 $ — $ — $ — $ — $ 204,699 Construction and development 244,577 2,729 — — — — 247,306 Home equity 39,846 — 183 229 — — 40,258 One-to-four-family 247,575 207 63 1,552 — — 249,397 Multi-family 103,447 1,216 — — — — 104,663 Total real estate loans 839,002 5,294 246 1,781 — — 846,323 CONSUMER LOANS Indirect home improvement 167,426 — — 367 — — 167,793 Solar 44,392 — — 41 — — 44,433 Marine 57,804 — — 18 — — 57,822 Other consumer 5,415 — 8 2 — — 5,425 Total consumer loans 275,037 — 8 428 — — 275,473 COMMERCIAL BUSINESS LOANS Commercial and industrial 124,089 8,813 — 5,784 — — 138,686 Warehouse lending 65,756 — — — — — 65,756 Total commercial business loans 189,845 8,813 — 5,784 — — 204,442 Total loans receivable, gross $ 1,303,884 $ 14,107 $ 254 $ 7,993 $ — $ — $ 1,326,238 At December 31, 2019, there were no troubled debt restructured loans (“TDRs”) that were modified in the previous 12 months that subsequently defaulted in the reporting year. The Company had no TDRs at December 31, 2019 or 2018. Related Party Loans Certain directors and executive officers or their related affiliates are customers of and have had banking transactions with the Company. Total loans to directors, executive officers, and their affiliates are subject to regulatory limitations. Outstanding loan balances were as follows and were within regulatory limitations: At December 31, 2019 2018 Beginning balance $ 3,325 $ 655 Additions — 2,688 Repayments (76) (18) Ending balance $ 3,249 $ 3,325 The aggregate maximum loan balance of extended credit was $3.6 million at December 31, 2019 and December 31, 2018, and includes the ending balances from the tables above. These loans and lines of credit were made in compliance with applicable laws on substantially the same terms (including interest rates and collateral) as those prevailing at the time for comparable transactions with other persons and do not involve more than the normal risk of collectability.

Servicing Rights

Servicing Rights	12 Months Ended
	Dec. 31, 2019
Fair Value, Off-balance Sheet Risk [Abstract]
Servicing Rights	NOTE 5 - 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 $1.46 billion and $1.19 billion at December 31, 2019 and 2018, respectively. The following table summarizes servicing rights activity for the years ended December 31, 2019 and 2018: 2019 2018 Beginning balance $ 10,429 $ 6,795 Additions 5,400 5,971 Servicing rights amortized (4,177) (2,337) Impairment of servicing rights (92) — Ending balance $ 11,560 $ 10,429 The fair market value of the servicing rights’ assets was $13.3 million and $14.6 million at December 31, 2019 and December 31, 2018, 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 December 31, At December 31, 2019 2018 Key assumptions: Weighted average discount rate 9.7 % 9.6 % Conditional prepayment rate (“CPR”) 17.1 % 9.4 % Weighted average life in years 5.1 7.7 Key economic assumptions and the sensitivity of the current fair value for single family MSR to immediate adverse changes in those assumptions at December 31, 2019 and December 31, 2018 were as follows: December 31, 2019 December 31, 2018 Aggregate portfolio principal balance $ 1,463,732 $ 1,186,858 Weighted average rate of note 4.2 % % At December 31, 2019 Base 0.5% Adverse Rate Change 1.0% Adverse Rate Change Conditional prepayment rate 17.1 % 24.6 % 32.5 % Fair value MSR $ 13,255 $ 10,582 $ 8,674 Percentage of MSR 0.9 % 0.7 % 0.6 % Discount rate 9.7 % 10.2 % 10.7 % Fair value MSR $ 13,255 $ 13,037 $ 12,826 Percentage of MSR 0.9 % 0.9 % 0.9 % At December 31, 2018 Base 0.5% Adverse Rate Change 1.0% Adverse Rate Change Conditional prepayment rate 9.4 % 11.6 % 17.7 % Fair value MSR $ 14,218 $ 12,723 $ 10,358 Percentage of MSR 1.2 % 1.1 % 0.9 % Discount rate 9.6 % 10.1 % 10.6 % Fair value MSR $ 14,218 $ 13,912 $ 13,617 Percentage of MSR 1.2 % 1.2 % 1.2 % The above table shows 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 above table references a 50 basis point and 100 basis point decrease in note rates and the impact on prepayment speeds and discount rates. 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 as a particular point in time. Those assumptions may not be appropriate if they are applied to a different point in time. The Company recorded $3.5 million and $2.4 million of gross contractually specified servicing fees, late fees, and other ancillary fees resulting from servicing of loans for the years ended December 31, 2019 and 2018, respectively. The income, net of amortization, is included in service charges and fee income on the Consolidated Statements of Income.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Premises and Equipment	NOTE 6 - PREMISES AND EQUIPMENT Premises and equipment at December 31, 2019 and 2018 were as follows: 2019 2018 Land $ 5,227 $ 5,227 Buildings 16,769 16,772 Furniture, fixtures, and equipment 13,562 12,039 Leasehold improvements 2,848 2,422 Building improvements 6,572 5,897 Projects in process 407 674 Subtotal 45,385 43,031 Less accumulated depreciation and amortization (16,615) (13,921) Total $ 28,770 $ 29,110 Depreciation and amortization expense for these assets totaled $2.8 million and $1.8 million for the years ended December 31, 2019 and 2018, respectively.

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Leases	NOTE 7 - LEASES The Company has operating leases for retail bank and home lending branches, and certain equipment. The ROU assets obtained in exchange for operating lease obligations totaled $5.1 million at January 1, 2019, the adoption date for ASU No. 2016-02. During 2019, the Company obtained additional ROU assets of $1.0 million related to operating lease obligations. The Company’s leases have remaining lease terms of four months to eight years, some of which include options to extend the leases for up to five years. The components of lease cost (included in occupancy expense on the Consolidated Statements of Income) are as follows for the year ended December 31, 2019: Year Ended December 31, 2019 Lease cost: Operating lease cost $ 1,285 Short-term lease cost 166 Total lease cost $ 1,451 The following table provides supplemental information related to operating leases at or for the year ended December 31, 2019: At or For the Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 1,331 Weighted average remaining lease term- operating leases 5.3 years Weighted average discount rate- operating leases 3.0 % 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 which corresponded with the remaining lease term as of December 31, 2018, for leases that existed at adoption and at the lease commencement date for leases entered into subsequent to adoption. Prior to the adoption of ASU 2016-02, rent expense for the year ending December 31, 2018 was $1.2 million. Maturities of operating lease liabilities at December 31, 2019 for future periods are as follows: 2020 $ 1,298 2021 1,169 2022 1,065 2023 674 2024 614 Thereafter 884 Total lease payments 5,704 Less imputed interest (490) Total $ 5,214

Other Real Estate Owned

Other Real Estate Owned	12 Months Ended
	Dec. 31, 2019
Banking and Thrift [Abstract]
Other Real Estate Owned	NOTE 8 - OTHER REAL ESTATE OWNED The following table presents the activity related to OREO at and for the years ended December 31: At or For the Year Ended December 31, 2019 2018 Beginning balance $ 689 $ — Additions 242 689 Gross proceeds from sale of OREO (901) — Gain on sale of OREO 138 — Ending balance $ 168 $ 689 There were $168,000 and $689,000 in OREO properties at December 31, 2019 and 2018, respectively. Holding costs were $13,000 and $2,000 for the years ended December 31, 2019 and 2018, respectively. There were $1.0 million and $261,000 in mortgage loans collateralized by residential real estate property in the process of foreclosure at December 31, 2019, and 2018, respectively.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2019
Banking and Thrift [Abstract]
Deposits	NOTE 9 - DEPOSITS Deposits are summarized as follows at December 31: December 31, December 31, 2019 (1)(2) 2018 (1)(2) Noninterest-bearing checking $ 260,131 $ 221,107 Interest-bearing checking 177,972 151,103 Savings 118,845 122,344 Money market (3) 270,489 282,595 Certificates of deposit less than $100,000 (4) 277,988 243,193 Certificates of deposit of $100,000 through $250,000 181,402 154,095 Certificates of deposit of $250,000 and over (5) 92,110 86,357 Escrow accounts related to mortgages serviced 13,471 13,425 Total $ 1,392,408 $ 1,274,219 ________________________ (1) Includes $117.1 million and $120.0 million of deposits at December 31, 2019 and 2018, respectively, remaining from the January 22, 2016 purchase of four retail bank branches from Bank of America, N.A. (the “Branch Purchase”). (2) Includes $299.0 million and $321.1 million of deposits at December 31, 2019 and 2018, respectively, from the Anchor Acquisition. (3) Includes $6.2 million and $1,000 of brokered deposits at December 31, 2019 and 2018, respectively. (4) Includes $141.4 million and $116.7 million of brokered deposits at December 31, 2019 and 2018, respectively. (5) Time deposits that meet or exceed the FDIC insurance limit. Scheduled maturities of time deposits at December 31, 2019 for future years ending are as follows: At December 31, 2019 Maturing in 2020 $ 357,786 Maturing in 2021 103,560 Maturing in 2022 57,972 Maturing in 2023 15,120 Maturing in 2024 17,062 Thereafter — Total $ 551,500 Interest expense by deposit category for the years ended December 31, 2019 and 2018 is as follows: 2019 2018 Interest-bearing checking $ 1,414 $ 227 Savings and money market 3,098 2,054 Certificates of deposit 11,650 5,040 Total $ 16,162 $ 7,321 The Company had related party deposits of approximately $3.3 million and $6.2 mill ion at December 31, 2019 and 2018, respectively, which includes deposits held for directors and executive officers.

Debt

Debt	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Debt	NOTE 10 - DEBT Borrowings The Bank is a member of the FHLB of Des Moines, which entitles it to certain benefits including a variety of borrowing options consisting of a secured credit line that allows both fixed and variable rate advances. The FHLB borrowings at December 31, 2019 and 2018, consisted of a warehouse securities credit line (“securities line”), which allows advances with interest rates fixed at the time of borrowing and a warehouse federal funds (“Fed Funds”) advance, which allows daily advances at variable interest rates. Credit capacity is primarily determined by the value of assets collateralized at the FHLB, funds on deposit at the FHLB, and stock owned by the Bank. Credit is limited to 45% of the Company’s total assets and available pledged assets. The Bank entered into an Advanced, Pledges and Security Agreement with the FHLB for which specific loans are pledged to secure these credit lines. At December 31, 2019, loans of approximately $646.1 million were pledged to the FHLB. At December 31, 2019, the Bank’s total borrowing capacity was $477.2 million with the FHLB of Des Moines, with unused borrowing capacity of $386.5 million. In addition, all FHLB stock owned by the Company is collateral for credit lines. The Bank maintains a short-term borrowing line with the FRB with total credit based on eligible collateral. The Bank can borrow under the Term Auction or Term Facility at rates published by the San Francisco FRB. At December 31, 2019 and 2018, the Bank had approximately $318.8 million and $265.2 million, respectively, in pledged consumer loans with a Term Auction or Term Facility borrowing capacity of $156.1 million and $127.7 million, respectively, of which none was outstanding at either date. The Bank also had $71.0 million unsecured Fed Funds lines of credit with other financial institutions of which none was outstanding at December 31, 2019. Advances on these lines at December 31, 2019 and 2018 were as follows: 2019 2018 Federal Home Loan Bank - (interest rates ranging from 1.58% to 2.87% and 1.15% to 2.87% at December 31, 2019 and 2018, respectively) $ 84,864 $ 137,149 Total $ 84,864 $ 137,149 Subordinated Note On October 15, 2015 (the “Closing Date”), FS Bancorp, Inc. issued an unsecured subordinated term note in the aggregate principal amount of $10.0 million due October 1, 2025 (the “Subordinated Note”) pursuant to a Subordinated Loan Agreement with Community Funding CLO, Ltd. The Subordinated Note bears interest at an annual interest rate of 6.50%, payable by the Company quarterly in arrears on January 1, April 1, July 1 and October 1 of each year, commencing on the first such date following the Closing Date and on the maturity date. The Subordinated Note will mature on October 1, 2025 but may be prepaid at the Company’s option and with regulatory approval at any time on or after five years after the Closing Date or at any time upon certain events, such as a change in the regulatory capital treatment of the Subordinated Note or the interest on the Subordinated Note no longer being deductible by the Company for United States federal income tax purposes. The Company contributed $9.0 million of the proceeds from the Subordinated Note as additional capital to the Bank in the fourth quarter of 2015 and used the balance to fund general working capital and operating expenses. The maximum and average outstanding and weighted average interest rates on debt during the years ended December 31, 2019 and 2018 were as follows: 2019 2018 Maximum balance: Federal Home Loan Bank advances and Fed Funds $ 186,401 $ 180,025 Federal Reserve Bank $ 5,000 $ — Fed Funds lines of credit $ 5,000 $ 21,016 Subordinated note $ 10,000 $ 10,000 Average balance: Federal Home Loan Bank advances and Fed Funds $ 93,653 $ 96,044 Federal Reserve Bank $ 167 $ — Fed Funds lines of credit $ 318 $ 5,286 Subordinated note $ 10,000 $ 10,000 Weighted average interest rate: Federal Home Loan Bank advances and Fed Funds 2.61 % 2.02 % Federal Reserve Bank 2.96 % — % Fed Funds lines of credit 2.09 % 1.93 % Subordinated note 6.50 % 6.50 % Scheduled maturities of Federal Home Loan Bank advances were as follows: Interest Years Ending December 31, Balances Rates 2020 $ 12,336 2.46 % 2021 45,000 2.48 % 2022 — — % 2023 13,633 2.03 % 2024 13,895 1.77 % Total $ 84,864

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2019
Compensation and Retirement Disclosure [Abstract]
Employee Benefit	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 of service during the employees’ first 12‑month period and based on the employee’s anniversary date will be vested in the ESOP. The employee will be 100% vested in the ESOP after two years of working at least 1,000 hours in each of those two years. 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, 2019, the ESOP paid the eighth annual installment of principal in the amount of $275,000, plus accrued interest of $20,000 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 at December 31, 2019 for the prior 90 days. 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 years ended December 31, 2019 and 2018, was $1.5 million, and $1.2 million, respectively. Shares held by the ESOP at December 31, 2019 and December 31, 2018, were as follows (shown as actual): Balances Balances at December 31, 2019 at December 31, 2018 Allocated shares 189,511 176,809 Committed to be released shares — — Unallocated shares 51,842 77,763 Total ESOP shares 241,353 254,572 Fair value of unallocated shares (in thousands) $ 3,006 $ 3,627 401(k) Plan The Company has a salary deferral 401(k) Plan covering substantially all of its employees. Employees are eligible to participate in the 401(k) plan at the date of hire if they are 18 years of age. Eligible employees may contribute through payroll deductions and are 100% vested at all times in their deferral contributions account. The Company matches 100% for contributions of 1% to 3%, and 50% for contributions of 4% to 5%. There was a $1.2 million and $917,000 matching contribution for the years ended December 31, 2019 and 2018, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
INCOME TAXES
Income Taxes	NOTE 12 - INCOME TAXES The components of income tax expense for the years ended December 31, 2019 and 2018, were as follows: 2019 2018 Provision for income taxes Current $ 4,425 $ 3,455 Deferred 988 768 Total provision for income taxes $ 5,413 $ 4,223 A reconciliation of the effective income tax rate with the federal statutory tax rates at December 31, 2019 and 2018 was as follows: 2019 2018 Amount Rate Amount Rate Income tax provision at statutory rate $ 5,907 21.0 % $ 6,000 21.0 % Tax exempt income (225) (0.8) (129) (0.5) Nondeductible items resulting in increase in tax 129 0.5 279 1.0 Decrease in tax resulting from other items (78) (0.3) (87) (0.3) Equity compensation (691) (2.5) (571) (2.0) Executive compensation 112 0.4 135 0.5 Bargain purchase gain — — (1,594) (5.6) ESOP 259 0.9 190 0.7 Total $ 5,413 19.2 % $ 4,223 14.8 % Total deferred tax assets and liabilities at December 31, 2019 and 2018 were as follows: 2019 2018 Deferred Tax Assets Net operating loss carryforward $ 864 $ 1,201 Allowance for loan losses 2,844 2,301 Purchase accounting adjustments 466 776 Other real estate owned 126 127 Non-accrued loan interest 13 115 Restricted stock awards 68 54 Non-qualified stock options 185 71 Securities available-for-sale — 405 Lease liability 1,121 — Other 351 473 Total deferred tax assets 6,038 5,523 Deferred Tax Liabilities Loan origination costs (1,341) (626) Servicing rights (2,525) (2,241) Prepaids — (166) Stock dividend - FHLB stock (59) (73) Property, plant, and equipment (1,362) (1,489) Purchase accounting adjustments (1,404) (1,289) Securities available-for-sale (216) — Lease right-of-use assets (1,078) — Other (24) — Total deferred tax liabilities (8,009) (5,884) Net deferred tax liabilities $ (1,971) $ (361) At December 31, 2019, the Company had a net operating loss carryforward of approximately $4.0 million, which begins to expire in 2035. The Company files a U.S. Federal income tax return and Oregon State return, which are subject to examination by tax authorities for years 2016 and later. At December 31, 2019 and 2018, the Company had no uncertain tax positions. The Company recognizes interest and penalties in tax expense and at December 31, 2019 and 2018, the Company recognized no interest and penalties.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 13 - COMMITMENTS AND CONTINGENCIES Commitments - The Company is party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit. These instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized on the Consolidated Balance Sheets. 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 December 31, 2019 and 2018: December 31, December 31, 2019 2018 COMMITMENTS TO EXTEND CREDIT REAL ESTATE LOANS Commercial $ 247 $ 5,836 Construction and development 95,031 76,889 One-to-four-family (includes locks for salable loans) 39,697 35,714 Home equity 47,880 41,204 Multi-family 622 515 Total real estate loans 183,477 160,158 CONSUMER LOANS 22,176 18,560 COMMERCIAL BUSINESS LOANS Commercial and industrial 72,731 72,880 Warehouse lending 33,888 44,243 Total commercial business loans 106,619 117,123 Total commitments to extend credit $ 312,272 $ 295,841 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 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 $293,000 and $299,000 at December 31, 2019 and 2018, respectively. 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 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 December 31, 2019, the total loans sold to the FHLB were $66.4 million with the FLA being $938,000 and the CE obligation at $811,000 or 1.2% of the loans outstanding. Management has established a holdback of 10% of the outstanding CE obligation, or $272,000, which is a part of the off-balance sheet holdback for loans sold. There were no outstanding delinquencies on the loans sold to the FHLB of Des Moines at December 31, 2019 and December 31, 2018. Contingent liabilities for loans held for sale - In the ordinary course of business, loans are sold with limited recourse against the Company and may have to subsequently be repurchased due to defects that occurred during the origination of the loan. The defects are categorized as documentation errors, underwriting errors, early payoff, early payment defaults, breach of representation or warranty, servicing errors, and/or fraud. When a loan sold to an investor without recourse fails to perform according to its contractual terms, the investor will typically review the loan file to determine whether defects in the origination process occurred. If a defect is identified, the Company may be required to either repurchase the loan or indemnify the investor for losses sustained. If there are no such defects, the Company has no commitment to repurchase the loan. The Company has recorded a holdback reserve of $1.2 million and $1.0 million to cover loss exposure related to these guarantees for one-to-four-family loans sold into the secondary market at December 31, 2019 and 2018, respectively, which is included in other liabilities in the Consolidated Balance Sheets. 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 their 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 months of their then current salary, subject to certain requirements in the change of control agreements. The Bank received 7,158 shares of Class B common stock in Visa, Inc. at no cost as a result of the Visa initial public offering (“IPO”) in March 2008. These Class B shares of stock held by the Bank could be converted to Class A shares at a conversion rate of 1.6228 (reduced from a conversion rate of 1.6298 previously reported), when all litigation pending as of the date of the IPO is concluded. At December 31, 2019, the date that litigation will be concluded cannot be determined. Until such time, the stock cannot be redeemed and the sale of Class B shares is restricted. These shares are considered an equity security without a readily determinable market value and the Bank’s current carrying value is $0. Visa, Inc. Class A stock’s market value at December 31, 2019 and December 31, 2018 was $187.90 per share and $131.94 per share, respectively. 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 December 31, 2019.

Significant Concentration of Cr

Significant Concentration of Credit Risk	12 Months Ended
	Dec. 31, 2019
Risks and Uncertainties [Abstract]
Significant Concentration of Credit Risk	NOTE 14 - SIGNIFICANT CONCENTRATION OF CREDIT RISK 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 one 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 and solar loans are originated through a network of home improvement contractors and dealers located throughout Washington, Oregon, California, Idaho, Colorado, and Arizona. Loans are generally secured by collateral and rights to collateral vary and are legally documented to the extent practicable. The concentration on commercial real estate remains below the 300% of Risk Based Capital regulatory threshold and the subset of construction concentration, excluding owner-occupied loans is within Board approved limits. The construction, land development, and other land concentration represents less than 100% of the Bank’s total regulatory capital at 85.7% and is focused on in city, in fill vertical construction financing in King and Snohomish counties. Local economic conditions may affect borrowers’ ability to meet the stated repayment terms.

Regulatory Capital

Regulatory Capital	12 Months Ended
	Dec. 31, 2019
Regulatory Capital Requirements [Abstract]
Regulatory Capital	NOTE 15 - 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. Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios (set forth in the table below) of Tier 1 capital (as defined in the regulations) to total average assets (as defined), and minimum ratios of Tier 1 total capital (as defined) and common equity Tier 1 (“CET 1”) capital to risk-weighted assets (as defined). The Bank must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage, and CET 1 capital ratios as set forth in the table below to be categorized as well capitalized. At December 31, 2019 and December 31, 2018, the Bank was categorized as well capitalized under applicable regulatory requirements. There are no conditions or events since that notification that management believes have changed the Bank’s category. Management believes, at December 31, 2019, that the Company and the Bank met all capital adequacy requirements. The following table compares the Bank’s actual capital amounts and ratios at December 31, 2019 and 2018 to their minimum regulatory capital requirements and well capitalized regulatory capital at those dates (dollars in thousands): To be Well Capitalized Under Prompt For Capital For Capital Adequacy Corrective Actual Adequacy Purposes with Capital Buffer Action Provisions Bank Only Amount Ratio Amount Ratio Amount Ratio Amount Ratio At December 31, 2019 Total risk-based capital (to risk-weighted assets) $ 209,535 14.64 % $ 114,502 8.00 % $ 150,283 10.50 % $ 143,127 10.00 % Tier 1 risk-based capital (to risk-weighted assets) $ 196,013 13.70 % $ 85,876 6.00 % $ 121,658 8.50 % $ 114,502 8.00 % Tier 1 leverage capital (to average assets) $ 196,013 11.56 % $ 67,808 4.00 % $ N/A N/A $ 84,761 5.00 % CET 1 capital (to risk-weighted assets) $ 196,013 13.70 % $ 64,407 4.50 % $ 100,189 7.00 % $ 93,033 6.50 % At December 31, 2018 Total risk-based capital (to risk-weighted assets) $ 188,472 13.52 % $ 111,493 8.00 % $ 137,694 9.88 % $ 139,366 10.00 % Tier 1 risk-based capital (to risk-weighted assets) $ 175,824 12.62 % $ 83,620 6.00 % $ 109,820 7.88 % $ 111,493 8.00 % Tier 1 leverage capital (to average assets) $ 175,824 10.67 % $ 65,884 4.00 % $ N/A N/A $ 82,355 5.00 % CET 1 capital (to risk-weighted assets) $ 175,824 12.62 % $ 62,715 4.50 % $ 88,846 6.38 % $ 90,588 6.50 % In addition to the minimum CET 1, Tier 1, total capital, and leverage ratios, the Bank is required to maintain a capital conservation buffer consisting of additional CET 1 capital greater than 2.5% of risk-weighted assets above the required minimum levels in order to avoid limitations on paying dividends, engaging in share repurchases, and paying discretionary bonuses on percentages of eligible retained income that could be utilized for such actions. At December 31, 2019, the Bank’s capital conservation buffer was 2.5%. 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 December 31, 2019, FS Bancorp, Inc. would have exceeded all regulatory capital requirements. The regulatory capital ratios calculated for FS Bancorp Inc. at December 31, 2019 were 11.3% for Tier 1 leverage-based capital, 13.4% for Tier 1 risk-based capital, 14.3% for total risk-based capital, and 13.4% for CET 1 capital ratio, compared to 12.1%, 12.4%, 13.3%, and 12.4% at December 31, 2018, respectively.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE 16 - FAIR VALUE MEASUREMENTS The Company determines fair value based on the requirements established in Accounting Standards Codification (“ASC”) Topic 820, Fair Value Measurements, which provides a framework for measuring fair value in accordance with U.S. GAAP 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, requires us to use the exit price notion when measuring the fair value of instruments for disclosure purposes. The following definitions describe the levels of inputs that may be used to measure fair value: Level 1 - Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2 - Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. Level 3 - Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The following methods were used to estimate the fair value of certain assets and liabilities on a recurring and nonrecurring basis. Securities Available-for-Sale - The fair value of securities available-for-sale are recorded on a recurring basis. The fair value of investments and mortgage-backed securities are provided by a third-party pricing service. These valuations are based on market data using pricing models that vary by asset class and incorporate available current trade, bid and other market information, and for structured securities, cash flow, and loan performance data. The pricing processes utilize benchmark curves, benchmarking of similar securities, sector groupings, and matrix pricing. Option adjusted spread models are also used to assess the impact of changes in interest rates and to develop prepayment scenarios (Level 2). Certain other corporate securities and municipal bonds are generally measured at fair value based on discounted cash flow models (Level 3). Transfers between the fair value hierarchy are determined through the third-party service provider which, from time to time will transfer between levels based on market conditions per the related security. All models and processes used take into account market convention. Mortgage Loans Held for Sale - The fair value of loans held for sale reflects the value of commitments with investors and/or the relative price as delivered into a To-Be-Announced (“TBA”) mortgage-backed security (Level 2). Derivative Instruments - The fair value of the interest rate lock commitments and forward sales commitments are estimated using quoted or published market prices for similar instruments, adjusted for factors such as pull-through rate assumptions based on historical information, where appropriate. TBA mortgage-backed securities are fair valued on similar contracts in active markets (Level 2) while locks and forwards with customers and investors are fair valued using similar contracts in the market and changes in the market interest rates (Level 2 and 3). Impaired Loans - Fair value adjustments to impaired collateral dependent loans are recorded to reflect partial write-downs based on the current appraised value of the collateral or internally developed models, which contain management’s assumptions. Management will utilize discounted cashflow impairment for TDRs when the change in terms results in a discount to the overall cashflows to be received (Level 3). Other Real Estate Owned - Fair value adjustments to OREO are recorded at the lower of carrying amount of the loan or fair value of the collateral less selling costs. Any write-downs based on the asset’s fair value at the date of acquisition are charged to the allowance for loan losses. After foreclosure, management periodically performs valuations such that the real estate is carried at the lower of its new cost basis or fair value, net of estimated costs to sell (Level 3). Servicing Rights - The fair value of mortgage servicing rights are estimated using net present value of expected cash flows using a third party model that incorporates assumptions used in the industry to value such rights, adjusted for factors such as weighted average prepayments speeds based on historical information where appropriate (Level 3). The following table presents assets and liabilities measured at fair value on a recurring basis at the dates indicated: At December 31, 2019 Financial Assets Level 1 Level 2 Level 3 Total Securities available-for-sale U.S. agency securities $ — $ 9,066 $ — $ 9,066 Corporate securities — 9,546 1,024 10,570 Municipal bonds — 20,982 138 21,120 Mortgage-backed securities — 62,850 — 62,850 U.S. Small Business Administration securities — 22,451 — 22,451 Mortgage loans held for sale, at fair value — 69,699 — 69,699 Derivatives Interest rate lock commitments with customers — — 557 557 Total assets measured at fair value $ — $ 194,594 $ 1,719 $ 196,313 Financial Liabilities Derivatives Individual forward sale commitments with investors $ — $ (8) $ (195) $ (203) Total liabilities measured at fair value $ — $ (8) $ (195) $ (203) At December 31, 2018 Financial Assets Level 1 Level 2 Level 3 Total Securities available-for-sale U.S. agency securities $ — $ 15,887 $ — $ 15,887 Corporate securities — 6,865 — 6,865 Municipal bonds — 14,194 — 14,194 Mortgage-backed securities — 44,836 — 44,836 U.S. Small Business Administration securities — 15,423 — 15,423 Mortgage loans held for sale, at fair value — 51,195 — 51,195 Derivatives Interest rate lock commitments with customers — — 503 503 Total assets measured at fair value $ — $ 148,400 $ 503 $ 148,903 Financial Liabilities Derivatives Individual forward sale commitments with investors $ — $ (540) $ (34) $ (574) Total liabilities measured at fair value $ — $ (540) $ (34) $ (574) During the year ended December 31, 2019, $1.0 million of corporate securities and $138,000 of municipal bonds available for sale were transferred from Level 2 to Level 3. The transfers were due to a lack of observable inputs and trade activity for those securities. There were no transfers between levels during the year ended December 31, 2018. The following table presents 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. December 31, 2019 Level 1 Level 2 Level 3 Total Impaired loans $ — $ — $ 3,128 $ 3,128 OREO — — 168 168 Servicing rights — — 13,255 13,255 December 31, 2018 Level 1 Level 2 Level 3 Total Impaired loans $ — $ — $ 3,894 $ 3,894 OREO — — 689 689 Servicing rights — — 14,593 14,593 Quantitative Information about Level 3 Fair Value Measurements - Shown in the table below is the fair value of financial instruments measured under a Level 3 unobservable input on a recurring and nonrecurring basis at December 31, 2019 and 2018: Level 3 Significant Weighted Average Fair Value Valuation Unobservable December 31, December 31, Instruments Techniques Inputs Range 2019 2018 RECURRING Interest rate lock commitments with customers Quoted market prices Pull-through expectations 80% - 99% 94.5 % 95.2 % Individual forward sale commitments with investors Quoted market prices Pull-through expectations 80% - 99% 94.5 % 95.2 % Corporate securities Discounted cash flows Discount rate 2.1% 2.1 % — Municipal bonds Discounted cash flows Discount rate 3.0% - 3.7% 3.4 % — NONRECURRING Impaired loans Fair value of underlying collateral Discount applied to the obtained appraisal 0% - 50% 10.0 % 10.0 % OREO Fair value of collateral Discount applied to the obtained appraisal 0% - 75% 10.0 % 10.0 % Servicing rights Industry sources Pre-payment speeds 0% - 50% 17.1 % 9.4 % 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 table provides a reconciliation of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the years ended December 31, 2019 and 2018. Net change in fair value for gains/ (losses) relating to Purchases items held at end of Beginning and Sales and Transfers Ending year included in Balance Issuances Settlements In Balance income 2019 Interest rate lock commitments with customers $ 503 $ 11,063 $ (11,009) $ — $ 557 $ 54 Individual forward sale commitments with investors (34) (1,444) 1,283 — (195) (161) Securities available-for-sale, at fair value — — — 1,162 1,162 — 2018 Interest rate lock commitments with customers $ 726 $ 9,722 $ (9,945) $ — $ 503 $ (223) Individual forward sale commitments with investors 51 850 (935) — (34) (85) 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 within other noninterest income. The following table provides estimated fair values of the Company’s financial instruments at December 31, 2019 and 2018, whether or not recognized at fair value in the Consolidated Balance Sheets: December 31, December 31, 2019 2018 Carrying Fair Carrying Fair Amount Value Amount Value Financial Assets Level 1 inputs: Cash and cash equivalents $ 45,778 $ 45,778 $ $ Certificates of deposit at other financial institutions 20,902 20,902 Level 2 inputs: Securities available-for-sale, at fair value 124,895 124,895 Loans held for sale, at fair value 69,699 69,699 FHLB stock, at cost 8,045 8,045 Accrued interest receivable 5,908 5,908 Level 3 inputs: Securities available-for-sale, at fair value 1,162 1,162 — — Loans receivable, gross 1,351,893 1,377,408 Servicing rights, held at lower of cost or fair value 11,560 13,255 Fair value interest rate locks with customers 557 557 Financial Liabilities Level 2 inputs: Deposits 1,392,408 1,385,658 Borrowings 84,864 85,268 Subordinated note 9,885 10,599 Accrued interest payable 273 273 Paired off commitments with investors 71 71 Individual forward sale commitments with investors 8 8 Level 3 inputs: Individual forward sale commitments with investors 195 195

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 17 - 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 years ended December 31, 2019 and 2018: At or For the Year Ended December 31, Numerator (in thousands): 2019 2018 Net income $ 22,717 $ 24,347 Dividends and undistributed earnings allocated to participating securities (73) — Net income available to common shareholders $ 22,644 $ 24,347 Denominator (shown as actual): Basic weighted average common shares outstanding 4,414,032 3,698,623 Dilutive shares 108,992 171,166 Diluted weighted average common shares outstanding 4,523,024 3,869,789 Basic earnings per share $ 5.13 $ 6.58 Diluted earnings per share $ 5.01 $ 6.29 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 36,337 11,326

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	NOTE 18 - 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 TBA mortgage-backed securities. The Company also enters into best efforts and mandatory delivery forward loan sale commitments with third party investors. 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. The following tables summarize the Company’s derivative instruments at the dates indicated: December 31, 2019 Fair Value Notional Asset Liability Fallout adjusted interest rate lock commitments with customers $ 33,914 $ 557 $ — Mandatory and best effort forward commitments with investors 43,752 — 195 Forward TBA mortgage-backed securities 46,000 — 8 December 31, 2018 Fair Value Notional Asset Liability Fallout adjusted interest rate lock commitments with customers $ 29,432 $ 503 $ — Mandatory and best effort forward commitments with investors 24,776 — 34 Forward TBA mortgage-backed securities 51,500 — 540 At December 31, 2019 and 2018, the Company had $46.0 million and $51.5 million of TBA trades with counterparties that required margin collateral of $1.2 million and $460,000, respectively. This collateral is included in interest-bearing deposits at other financial institutions on the Consolidated Balance Sheets. Changes in the fair value of the derivatives recognized in other noninterest income on the Consolidated Statements of Income and included in gain on sale of loans resulted in a net gain of $303,000 and net loss of ($702,000) for the years ended December 31, 2019 and 2018, respectively.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	NOTE 19 - 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, 2019, the Company awarded grants of 20,215 RSAs and 50,655 stock options with an exercise price equal to the market price of FS Bancorp’s common stock on the grant date of $48.74 per share. On August 15, 2018, the Company awarded grants of 25,000 RSAs and 100,000 stock options with an exercise price equal to the market price of FS Bancorp’s common stock at the grant date of $58.60 per share. In September 2013, the shareholders of FS Bancorp, Inc. approved the FS Bancorp, Inc. 2013 Equity Incentive Plan (the “2013 Plan”). The Plan provides for the grant of stock options and RSAs. The 2013 Plan authorizes 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 at the grant date of May 8, 2014, of $16.89 per share. The 2013 Plan authorizes the grant of RSAs totaling 129,605 shares to Company directors, advisory directors, emeritus directors, officers, and employees, and 125,105 shares were granted on May 8, 2014 at a grant date fair value of $16.89 per share. The remaining 4,500 RSAs were granted January 1, 2016 at a grant date fair value of $26.00 per share. All options and RSAs previously granted have vested as of December 31, 2019. Total share-based compensation expense for both plans was $869,000 for the year ended December 31, 2019, and $767,000 for the year ended December 31, 2018. The related income tax benefit was $182,000 and $161,000 for the years ended December 31, 2019 and 2018, 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 five years 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. At December 31, 2019, there were 336,345 and 6,013 stock option awards available to be granted under the 2018 Plan and the 2013 Plan, respectively. 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 fair value of options granted was determined using the following weighted-average assumptions as of the grant date for the years ended December 31, 2019 and 2018. Year Ended December 31, Year Ended December 31, 2019 2018 Dividend yield Expected volatility Risk-free interest rate Expected term in years 6.5 6.5 Weighted-average grant date fair value per option granted $ $ The following table presents a summary of the Company’s stock option plan awards during the year ended December 31, 2019 (shown as actual): Weighted-Average Weighted- Remaining Average Contractual Term In Aggregate Shares Exercise Price Years Intrinsic Value Outstanding at January 1, 2019 290,104 $ 31.27 6.83 $ 4,940,803 Granted 50,655 48.74 — — Less exercised 52,769 $ 16.89 — $ 1,799,754 Forfeited or expired — — — — Outstanding at December 31, 2019 287,990 $ 36.98 6.77 $ 7,722,369 Expected to vest, assuming a 0.31% annual forfeiture rate (1) 287,067 $ 36.92 6.76 $ 7,713,673 Exercisable at December 31, 2019 157,335 $ 22.19 4.90 $ 6,544,812 _________________________ (1) Forfeiture rate has been calculated and estimated to assume a forfeiture of 3.1% of the options forfeited over 10 years. At December 31, 2019, there was $1.4 million of total unrecognized compensation cost related to nonvested stock options granted under both plans. The cost is expected to be recognized over the remaining weighted-average vesting period of 3.9 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 in the 2013 Plan awarded as restricted stock generally vested over a three-year period for directors and a five-year period for employees, beginning at the grant date. Shares for the 2018 Plan, shares 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 year ended December 31, 2019 (shown as actual): Weighted-Average Grant-Date Fair Value Nonvested Shares Shares Per Share Nonvested at January 1, 2019 43,421 $ 41.22 Granted 20,215 $ 48.74 Less vested 23,421 $ 26.38 Forfeited or expired — — Nonvested at December 31, 2019 40,215 $ 53.64 At December 31, 2019, there was $2.0 million of total unrecognized compensation costs related to nonvested shares granted under both plans as RSAs. The cost is expected to be recognized over the remaining weighted-average vesting period of 4.0 years. The total fair value of shares vested for the years ended December 31, 2019 and 2018 was $1.2 million and $1.1 million, respectively.

Business Segments

Business Segments	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Business Segments	NOTE 20 - 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: · a funds transfer pricing (“FTP”) system, which allocates interest income credits and funding charges between the segments, assigning to each segment a funding credit for its liabilities, such as deposits, and a charge to fund its assets; · a cost per loan serviced allocation based on the number of loans being serviced on the balance sheet and the number of loans serviced for third parties; · an allocation based upon the approximate square footage utilized by the home lending segment in Company owned locations; · an allocation of charges for services rendered to the segments by centralized functions, such as corporate overhead, which are generally based on the number of full time employees (“FTEs”) in each segment; and · an allocation of the Company’s consolidated income taxes which are based on the effective tax rate applied to the segment’s pretax income or loss. 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 our 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 December 31, 2019, the Company’s retail deposit branch network consisted of 21 branches in the Pacific Northwest. At December 31, 2019 and December 31, 2018, deposits totaled $1. 39 billion and $1.27 billion, respectively. 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 originates one-to-four-family residential mortgage loans primarily for sale in the secondary markets as well as originating adjustable rate mortgage (“ARM”) loans held for investment. The majority of mortgage loans are sold to or securitized by FNMA, FHLMC, GNMA or the FHLB of Des Moines, while the Company retains the 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 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 primarily on the number of FTEs and assets within each segment for the years ended December 31, 2019 and 2018: At or For the Year Ended December 31, 2019 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 6,307 $ 64,001 $ 70,308 Provision for loan losses (2) (433) (2,447) (2,880) Noninterest income 13,209 9,826 23,035 Noninterest expense (14,283) (48,050) (62,333) Income before provision for income taxes 4,800 23,330 28,130 Provision for income taxes (924) (4,489) (5,413) Net income $ 3,876 $ 18,841 $ 22,717 Total assets $ 312,404 $ 1,400,652 $ 1,713,056 Total average assets for year ended $ 272,901 $ 1,377,468 $ 1,650,369 FTEs 127 325 452 At or For the Year Ended December 31, 2018 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 3,324 $ 48,774 $ 52,098 Provision for loan losses (224) (1,316) (1,540) Noninterest income (3) 14,025 12,825 26,850 Noninterest expense (15,894) (32,944) (48,838) Income before provision for income taxes 1,231 27,339 28,570 Provision for income taxes (182) (4,041) (4,223) Net income $ 1,049 $ 23,298 $ 24,347 Total assets $ 246,280 $ 1,375,364 $ 1,621,644 Total average assets for year ended $ 229,661 $ 945,052 $ 1,174,713 FTEs 115 309 424 ___________________________ (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. (2) The allocated provision for loan losses is partially associated with one-to-four-family, and home equity loans acquired from Anchor Bank totaling $198.5 million at December 31, 2019. (3) Barg ain purchase gain of $7.4 million was included in the commercial and consumer banking segment.

Revenue From Contracts With Cus

Revenue From Contracts With Customers	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customers	NOTE 21 - 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 of 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 years ended December 31, 2019 and 2018: At or For the Year Ended December 31, (Dollars in thousands): 2019 2018 Noninterest Income In-scope of Topic 606: Debit card interchange fees $ 1,848 $ 1,184 Fees from non-sufficient funds 1,065 561 Noninterest Income (in-scope of Topic 606) 2,913 1,745 Noninterest Income (out-of-scope of Topic 606) 20,122 25,105 Total Noninterest Income $ 23,035 $ 26,850 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 deposits 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.

Goodwill And Other Intangible A

Goodwill And Other Intangible Assets	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE 22 - 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 December 31, 2019 and 2018, 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 the Branch Purchase in 2016. 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, 2019, and 2018 and determined that no impairment of goodwill existed. The following table summarizes the changes in the Company’s other intangible assets comprised solely of CDI for the years ended December 31, 2019, and December 31, 2018. Other Intangible Assets Accumulated Gross CDI Amortization Net CDI Balance, December 31, 2017 $ 2,239 $ (922) $ 1,317 Amortization — (307) (307) Additions as a result of the Anchor Acquisition 5,251 (44) 5,207 Balance, December 31, 2018 7,490 (1,273) 6,217 Amortization — (760) (760) Balance, December 31, 2019 $ 7,490 $ (2,033) $ 5,457 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 $760,000 for the year ended December 31, 2019, and $351,000 for the same period in 2018. Amortization expense for the CDI is expected to be as follows for the years ended December 31: 2020 $ 706 2021 691 2022 691 2023 691 2024 621 Thereafter 2,057 Total $ 5,457

Parent Company Only Financial I

Parent Company Only Financial Information	12 Months Ended
	Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Parent Company Only Financial Information	NOTE 23 - PARENT COMPANY ONLY FINANCIAL INFORMATION The Condensed Balance Sheets, Statements of Income, and Statements of Cash Flows for FS Bancorp, Inc. (Parent Only) are presented below: Condensed Balance Sheets December 31, Assets 2019 2018 Cash and due from banks $ 5,568 $ 7,026 Investment in subsidiary 204,570 182,874 Other assets 172 175 Total assets $ 210,310 $ 190,075 Liabilities and Stockholders' Equity Subordinated note, net 9,885 9,865 Other liabilities 183 172 Total liabilities 10,068 10,037 Stockholders' equity 200,242 180,038 Total liabilities and stockholders' equity $ 210,310 $ 190,075 Condensed Statements of Income Year Ended December 31, 2019 2018 Interest from subsidiary $ 2 $ 2 Interest expense on subordinated note (679) (679) Dividends received from subsidiary 3,935 1,436 Other expenses (142) (157) Income before income tax benefit and equity in undistributed net income of subsidiary 3,116 602 Income tax benefit 172 175 Equity in undistributed earnings of subsidiary 19,429 23,570 Net income $ 22,717 $ 24,347 Condensed Statements of Cash Flows Year Ended December 31, 2019 2018 Cash flows from operating activities: Net income $ 22,717 $ 24,347 Equity in undistributed net income of subsidiary (19,429) (23,570) Amortization 20 20 ESOP compensation expense for allocated shares 1,231 940 Share-based compensation expense related to stock options and restricted stock 869 767 Other assets 3 115 Other liabilities 11 6 Net cash from operating activities 5,422 2,625 Cash flows from investing activities: Net proceeds from ESOP 275 269 Net cash from investing activities 275 269 Cash flows (used by) from financing activities: Proceeds from stock options exercised 705 1,117 Common stock repurchased for employee/director taxes paid on restricted stock awards (204) (251) Common stock repurchased (4,800) — Dividends paid on common stock (2,856) (1,915) Net cash (used by) from financing activities (7,155) (1,049) Net (decrease) increase in cash and cash equivalents (1,458) 1,845 Cash and cash equivalents, beginning of year 7,026 5,181 Cash and cash equivalents, end of year $ 5,568 $ 7,026

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Financial Statement Presentation	Financial Statement Presentation - The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) and with prevailing practices within the banking and securities industries. In preparing such financial statements, management is required to make certain estimates and judgments that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the balance sheet and the reported amounts of revenues and expenses for the reporting period. Actual results could differ significantly from those 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 - The consolidated financial statements include the accounts of FS Bancorp, Inc. and its wholly owned subsidiary, 1st Security Bank of Washington. All material intercompany accounts have been eliminated in consolidation.
Segment Reporting	Segment Reporting - The Company operates in two business segments through the Bank: commercial and consumer banking and home lending. 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 regularly reviewed for the purpose of allocating resources and evaluating performance of the Company’s businesses. The results for these business segments are based on management’s accounting process, which assigns income statement items and assets to each responsible operating segment. This process is dynamic and is based on management’s view of the Company’s operations. See “Note 20 - Business Segments.”
Subsequent Events	Subsequent Events - The Company has evaluated events and transactions subsequent to December 31, 2019 for potential recognition or disclosure.
Cash and Cash Equivalents	Cash and Cash Equivalents - Cash and cash equivalents include cash and due from banks, and interest-bearing balances due from other banks and the Federal Reserve Bank of San Francisco (“FRB”) and have an original maturity of 90 days or less at the time of purchase. At times, cash balances may exceed Federal Deposit Insurance Corporation (“FDIC”) insured limits. At December 31, 2019 and 2018, the Company had $8.6 million and $25,000, respectively, of cash and due from banks and interest-bearing deposits at other financial institutions in excess of FDIC insured limits.
Securities Available-for-Sale	Securities Available-for-Sale - Securities available-for-sale consist of debt securities that the Company has the intent and ability to hold for an indefinite period, but not necessarily to maturity. Such securities may be sold to implement the Company’s asset/liability management strategies and in response to changes in interest rates and similar factors. Securities available-for-sale are reported at fair value. Realized gains and losses on securities available-for-sale, determined using the specific identification method, are included in results of operations. Amortization of premiums and accretion of discounts are recognized as adjustments to yield over the contractual lives of the related securities with the exception of premiums for non-contingently callable debt securities which are amortized to the earliest call date, rather than the contractual maturity date. Unrealized holding gains and losses, net of the related deferred tax effect, are reported as a net amount in a separate component of equity entitled accumulated other comprehensive income (loss). Unrealized losses that are deemed to be other than temporary are reflected in results of operations. Any declines in the values of these securities that are considered to be other-than-temporary-impairment (“OTTI”) and credit-related are recognized in earnings. Noncredit-related OTTI on securities not expected to be sold is recognized in other comprehensive income (loss). The review for OTTI is conducted on an ongoing basis and takes into account the severity and duration of the impairment, recent events specific to the issuer or industry, fair value in relationship to cost, extent and nature of change in fair value, creditworthiness of the issuer including external credit ratings and recent downgrades, trends and volatility of earnings, current analysts’ evaluations, and other key measures. In addition, the Company does not intend to sell the securities and it is more likely than not that we will not be required to sell the securities before recovery of their amortized cost basis. In doing this, we take into account our balance sheet management strategy and consideration of current and future market conditions. Dividends and interest income are recognized when earned.
Federal Home Loan Bank Stock	Federal Home Loan Bank Stock - The Bank’s investment in FHLB stock is carried at cost, which approximates fair value. As a member of the FHLB system, the Bank is required to maintain an investment in capital stock of the FHLB in an amount of $1.9 million and 4.0% of advances from the FHLB. The Bank’s required minimum level of investment in FHLB stock is based on specific percentages of its outstanding mortgages, total assets, or FHLB advances. At December 31, 2019 and 2018, the Bank’s minimum level of investment requirement in FHLB stock was $8.0 million and $9.9 million, respectively. The Bank was in compliance with the FHLB minimum investment requirement at December 31, 2019 and 2018. Management evaluates FHLB stock for impairment as needed. Management’s determination of whether these investments are impaired is based on its assessment of the ultimate recoverability of cost rather than by recognizing temporary declines in value. The determination of whether a decline affects the ultimate recoverability of cost is influenced by criteria such as (1) the significance of any decline in net assets of the FHLB as compared with the capital stock amount for the FHLB and the length of time this situation has persisted; (2) commitments by the FHLB to make payments required by law or regulation and the level of such payments in relation to the operating performance of the FHLB; (3) the impact of legislative and regulatory changes on institutions and, accordingly, the customer base of the FHLB; and (4) the liquidity position of the FHLB. Based on its evaluation, management determined that there was no impairment of FHLB stock at December 31, 2019 and 2018, respectively.
Loans Held for Sale	Loans Held for Sale - The Bank records all mortgage loans held-for-sale at fair value. Fair value is determined by outstanding commitments from investors or current investor yield requirements calculated on the aggregate loan basis. Gains and losses on fair value changes of loans held for sale are recorded in the gain on sale of loans component of non-interest income. Origination fees and costs are recognized in earnings at the time of origination. Mortgage loans held for sale are sold with the mortgage service rights either released or retained by the Bank. Gains or losses on sales of mortgage loans are recognized based on the difference between the selling price and the carrying value of the related mortgage loans sold. All sales are made with limited recourse against the Company.
Other Real Estate Owned	Other Real Estate Owned - Other real estate owned (“OREO”) consists of properties or assets acquired through or in lieu of foreclosure, and are recorded initially at fair value less selling costs, with the initial charge made to the allowance for loan losses. Costs relating to development and improvement of the properties or assets are capitalized while costs relating to holding the properties or assets are expensed. Valuations are periodically performed by management, and a charge to earnings is recorded if the recorded value of a property exceeds its estimated net realizable value.
Derivatives	Derivatives - Commitments to fund mortgage loans (interest rate locks) to be sold into the secondary market and forward commitments for the future delivery of these mortgage loans are accounted for as free-standing derivatives. The fair value of the interest rate lock is recorded at the time the commitment to fund the mortgage loan is executed and is adjusted for the expected exercise of the commitments to fund the loans, the Company enters into forward commitments for the future delivery of mortgage loans when interest rate locks are entered. Fair values of these mortgage derivatives are estimated based on changes in mortgage interest rates from the date the interest on the loan is locked. Changes in the fair values of these derivatives are reported in “Gain on sale of loans” on the Consolidated Statements of Income.
Loans Receivable	Loans Receivable - Loans receivable, are stated at the amount of unpaid principal reduced by an allowance for loan losses and net deferred fees or costs. Interest on loans is calculated using the simple interest method based on the daily balance of the principal amount outstanding and is credited to income as earned. Loan fees, net of direct origination costs, are deferred and amortized over the life of the loan using the effective yield method. If the loan is repaid prior to maturity, the remaining unamortized net deferred loan origination fee is recognized in income at the time of repayment. Interest on loans is accrued daily based on the principal amount outstanding. Generally, the accrual of interest on loans is discontinued when, in management’s opinion, the borrower may be unable to meet payments as they become due or when they are past due 90 days as to either principal or interest (based on contractual terms), unless they are well secured and in the process of collection. All interest accrued but not collected for loans that are placed on non-accrual status or charged off are reversed against interest income. Subsequent collections on a cash basis are applied proportionately to past due principal and interest, unless collectability of principal is in doubt, in which case all payments are applied to principal. Loans are returned to accrual status when the loan is performing according to its contractual terms for at least six months and the collectability of principal and interest is no longer doubtful.
Impaired Loans	Impaired Loans - A loan is considered impaired when it is probable the Company will be unable to collect all contractual principal and interest payments due in accordance with the original or modified terms of the loan agreement. Impaired loans are measured on a loan by loan basis based on the estimated fair value of the collateral less estimated cost to sell if the loan is considered collateral dependent. Impaired loans not considered to be collateral dependent are measured based on the present value of expected future cash flows. Regular credit reviews of the portfolio also identify loans that are considered potentially impaired except for the smaller groups of homogeneous consumer loans. The categories of non-accrual loans and impaired loans overlap, although they are not coextensive. The Company considers all circumstances regarding the loan and borrower on an individual basis when determining whether an impaired loan should be placed on non-accrual status, such as the financial strength of the borrower, the collateral value, reasons for delay, payment record, the amount of past due and the number of days past due. Loans that experience insignificant payment delays and payment shortfalls are generally not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of shortfall in relation to the principal and interest owed. Troubled Debt Restructured Loans - Troubled debt restructured (“TDR”) loans are loans for which the Company, for economic or legal reasons related to the borrower’s financial condition, has granted a significant concession to the borrower that it would otherwise not consider. The loan terms which have been modified or restructured due to a borrower’s financial difficulty include but are not limited to: a reduction in the stated interest rate; an extension of the maturity at an interest rate below current market; a reduction in the face amount of the debt; a reduction in the accrued interest; or re-aging, extensions, deferrals and renewals. TDR loans are considered impaired loans and are individually evaluated for impairment and can be classified as either accrual or non-accrual. TDR loans are classified as non-performing loans unless they have been performing in accordance with their modified terms for a period of at least six months in which case they are placed on accrual status.
Allowance for Loan Losses	Allowance for Loan Losses (“ALLL”) - The ALLL is maintained at a level considered adequate to provide for probable losses on existing loans based on evaluating known and inherent risks in the loan portfolio. The allowance is reduced by loans charged off and increased by provisions charged to earnings and recoveries on loans previously charged-off. The allowance is based on management’s periodic, and systematic evaluation of factors underlying the quality of the loan portfolio including changes in the size and composition of the loan portfolio, the estimated value of any underlying collateral, actual loan loss experience, current economic conditions, and detailed analysis of individual loans for which full collectability may not be assured. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. While management uses the best information available to make its estimates, future adjustments to the allowance may be necessary if there is a significant change in economic and other conditions. The appropriateness of the ALLL is estimated based on these factors and trends identified by management at the time the financial statements are prepared. When available information confirms that specific loans or portions thereof are uncollectible, these amounts are charged-off against the ALLL. The existence of some or all of the following criteria will generally confirm that a loss has been incurred: the loan is significantly delinquent and the borrower has not evidenced the ability or intent to bring the loan current; the Company has no recourse to the borrower, or if it does, the borrower has insufficient assets to pay the debt; the estimated fair value of the loan collateral is significantly below the current loan balance, and there is little or no near-term prospect for improvement. A provision for loan losses is charged against income and added to the ALLL based on regular assessment of the loan portfolio. The ALLL is allocated to certain loan categories based on the relative risk characteristics, asset classifications, and actual loss experience within the loan portfolio. Although management has allocated the ALLL to various loan portfolio segments, the allowance is general in nature and is available for the loan portfolio in its entirety. The ultimate recovery of all loans is susceptible to future market factors beyond the Company’s control. These factors may result in losses or recoveries differing significantly from those provided for in the financial statements. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company’s ALLL, and may require the Company to make additions to the allowance based on their judgment about information available to them at the time of their examinations.
Reserve for Unfunded Loan Commitments	Reserve for Unfunded Loan Commitments - The reserve for unfunded loan commitments is maintained at a level believed by management to be sufficient to absorb estimated probable losses related to these unfunded credit facilities. The determination of the adequacy of the reserve is based on periodic evaluations of the unfunded credit facilities including an assessment of the probability of commitment usage, credit risk factors for loans outstanding to these same customers, and the terms and expiration dates of the unfunded credit facilities. The reserve for unfunded loan commitments is included in other liabilities on the consolidated balance sheet, with changes to the balance charged against noninterest expense.
Premises and Equipment, Net	Premises and Equipment, Net - Land is carried at cost. Premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. The estimated useful lives used to compute depreciation include building and building improvements from 25 to 40 years and furniture, fixtures, and equipment from 3 to 10 years. Leasehold and tenant improvements are amortized using the straight-line method over the lesser of useful life or the life of the related lease. Gains or losses on dispositions are reflected in Consolidated Statements of Income. Management reviews buildings, improvements and equipment for impairment on an annual basis or whenever events or changes in the circumstances indicate that the undiscounted cash flows for the property are less than its carrying value. If identified, an impairment loss is recognized through a charge to earnings based on the fair value of the property.
Transfers of Financial Assets and Servicing Rights	Transfers of Financial Assets - Transfers of an entire financial asset, a group of entire financial assets, or participating interest in an entire financial asset are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Servicing Rights - Servicing assets are recognized as separate assets when rights are acquired through purchase or through sale of financial assets. Generally, purchased servicing rights are capitalized at the cost to acquire the rights. For sales of mortgage, commercial and consumer loans, a portion of the cost of originating the loan is allocated to the servicing right based on relative fair value. Fair value is based on market prices for comparable mortgage, commercial, or consumer servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income, such as the cost to service, the discount rate, the custodial earnings rate, an inflation rate, ancillary income, prepayment speeds, and default rates and losses. Servicing assets are evaluated quarterly for impairment based upon the fair value of the rights as compared to amortized cost. Impairment is determined by stratifying rights into tranches based on predominant characteristics, such as interest rate, loan type, and investor type. Impairment is recognized through a valuation allowance for an individual tranche, to the extent that fair value is less than the capitalized amount for the tranche. If the Company later determines that all or a portion of the impairment no longer exists for a particular tranche, a reduction of the allowance may be recorded as an increase to income. Capitalized servicing rights are stated separately on the Consolidated Balance Sheets and are amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets.
Income Taxes	Income Taxes - The Company files a consolidated federal income tax return. Deferred federal income taxes result from temporary differences between the tax basis of assets and liabilities, and their reported amounts in the financial statements. These will result in differences between income for tax purposes and income for financial reporting purposes in future years. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. Valuation allowances are established to reduce the net recorded amount of deferred tax assets if it is determined to be more likely than not, that all or some portion of the potential deferred tax asset will not be realized. The Company follows the authoritative guidance issued related to accounting for uncertainty in income taxes. The guidance prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. It is the Company’s policy to record any penalties or interest arising from federal or state taxes as a component of income tax expense.
Employee Stock Ownership Plan	Employee Stock Ownership Plan - Compensation expense recognized for the Company’s ESOP equals the fair value of shares that have been allocated or committed to be released for allocation to participants. Any difference between the fair value of the shares at the time and the ESOP’s original acquisition cost is charged or credited to stockholders’ equity (additional paid-in capital). The cost of ESOP shares that have not yet been allocated or committed to be released is deducted from stockholders’ equity.
Earnings Per Share	Earnings Per Share (“EPS”) - Basic EPS are computed by dividing income available to common stockholders by the weighted average number of common shares outstanding for the period. 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 purposes of computing basic and dilutive EPS, ESOP shares that have been committed to be released are outstanding and ESOP shares that have not been committed to be released shall not be considered outstanding.
Comprehensive Income (Loss)	Comprehensive Income (Loss) - Comprehensive income (loss) is comprised of net income and other comprehensive income (loss). Other comprehensive income (loss) includes unrealized holding gains and losses on securities available-for-sale, net of tax recorded directly to equity.
Financial Instruments	Financial Instruments - In the ordinary course of business, the Company has entered into agreements for off-balance-sheet financial instruments consisting of commitments to extend credit and stand-by letters of credit. Such financial instruments are recorded in the financial statements when they are funded or related fees are incurred or received.
Restricted Assets	Restricted Assets - Regulations of the Board of Governors of the Federal Reserve System (“Federal Reserve”) require that the Bank maintain reserves in the form of cash on hand and deposit balances with the FRB, based on a percentage of deposits. The amounts of such balances for the years ended December 31, 2019 and 2018 were $0.0 and $17.4 million, respectively, included in interest-bearing deposits at other financial institutions on the Consolidated Balance Sheets.
Marketing and Advertising Costs	Marketing and Advertising Costs - The Company records marketing and advertising costs as expenses as they are incurred. Total marketing and advertising expense was $678,000 and $747,000 for the years ended December 31, 2019 and 2018, respectively.
Stock-Based Compensation	Stock-Based Compensation - Compensation cost is recognized for stock options and restricted stock awards, based on the fair value of these awards at the grant date. A Black-Scholes model is utilized to estimate the fair value of stock options, while the market price of the Company’s common stock at the grant date is used for restricted stock awards. Compensation cost is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award.
Goodwill	Goodwill - Goodwill is recorded upon completion of a business combination as the difference between the purchase price and the fair value of net identifiable assets acquired. Goodwill was not recorded until the first quarter of 2016 in recognition of the four retail branches purchased from Bank of America on January 22, 2016. The Company completes its annual review of goodwill during the fourth quarter of each fiscal year. An assessment of qualitative factors is completed to determine if it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the qualitative analysis concludes that further analysis is required, then a quantitative impairment test would be completed. The quantitative goodwill impairment test is used to identify the existence of impairment and the amount of impairment loss and compares the reporting unit’s estimated fair value, including goodwill, to its carrying amount. If the fair value exceeds the carrying amount then goodwill is not considered impaired. If the carrying amount exceeds its fair value, an impairment loss would be recognized equal to the amount of excess, limited to the amount of total goodwill allocated to that reporting unit. There was no goodwill impairment at December 31, 2019 or 2018.
Business Combinations	Business Combinations - The Company accounts for business combinations using the acquisition method of accounting. The accounts of an acquired entity are included as of the date of acquisition, and any excess of purchase price over the fair value of the net assets acquired is capitalized as goodwill. In the event that the fair value of net assets acquired exceeds the purchase price, including fair value of liabilities assumed, a bargain purchase gain is recorded on that acquisition. Under this method, all identifiable assets acquired, including purchased loans, and liabilities assumed are recorded at fair value. The Company typically issues common stock and/or pays cash for an acquisition, depending on the terms of the acquisition agreement. The value of shares of common stock issued is determined based on the market price of the stock as of the closing of the acquisition.
Acquired Loans	Acquired Loans - Acquired loans are recorded at their initial fair value and adjusted for subsequent advances, pay downs, amortization or accretion of any premium or discount on purchase, charge-offs and additional provisioning that may be required.
Application of New Accounting Guidance	Application of New Accounting Guidance in 2019 On January 1, 2019, the Company adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2016‑02, Leases (Topic 842) . ASU No. 2016‑02 requires lessees to recognize on the balance sheet the assets and liabilities arising from operating leases. A lessee should recognize a liability to make lease payments and an ROU asset representing its right to use the underlying asset for the lease term. A lessee should include payments to be made in an optional period only if the lessee is reasonably certain to exercise an option to extend the lease or not to exercise an option to terminate the lease. For operating leases, the lease cost should be allocated over the lease term on a generally straight-line basis. In July 2018, the FASB issued ASU No, 2018-10, Codification Improvements to Topic 842, Leases and ASU No. 2018-11, Leases (Topic 842): Targeted Improvements . These ASUs contain clarifications to ASU 2016-02, including providing a new transition method in addition to the existing transition method contained in ASU No. 2016-02 to allow entities to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. These amendments have the same effective date as ASU 2016-02. In March 2019, FASB issued ASU 2019-01, Leases (Topic 842), Codification Improvements . The amendment in this ASU that is applicable to the Company clarifies interim disclosure requirements that allow omission of required transition disclosures. For financial reporting purposes, the Company applied the modified retrospective transition approach and elected to apply the transition option included in ASU 2018-11 on the effective date, January 1, 2019, which eliminates the requirement for reporting comparative periods presented in the financial statements prior to that date. The new standard provides for a number of practical expedients in transition. The Company elected the package of practical expedients, which permits us to not reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. The Company also elected the use-of-hindsight and elected the practical expedient to not separate lease and non-lease components on our real estate leases where we are the lessee. The Company did not elect the practical expedient pertaining to land easement as it is not applicable to us. The new standard also provides practical expedients for an entity's ongoing accounting. The Company has elected the short-term lease recognition exemption for certain leases which are less than 12 months in duration or month-to-month. This means, for those leases that qualify, ROU assets or lease liabilities will not be recognized. The adoption of this ASU on January 1, 2019 created ROU assets of $5 .1 million and operating lease liabilities of $5.2 million, and the related impact to the Company’s first quarter 2019 Consolidated Balance Sheet was approximately 0.3% of total assets. Additional disclosures required by the ASU have been included in “Note 7 - Leases.”
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTS In June 2016, the FASB issued 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. The ASU is intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations. The ASU requires the recognition and measurement of all current expected credit losses (“CECL”) for 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 full amount of 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, after the October 16, 2019 FASB board decision to approve extending the adoption date for certain registrants, including the Company. 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 new ASU and has run parallel computations with the current GAAP incurred loss model. As part of the implementation, the Company modeled the various methods prescribed in the ASU against the Company’s identified loan segments. The Company anticipates continuing to run parallel computations as it continues to evaluate the impact of adoption of the new standard. Once adopted, the Company anticipates the ALLL to increase through a one‑time adjustment to retained earnings, however, until the evaluation is complete the magnitude of the potential increase 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 . This ASU clarifies and improves areas of guidance related to the recently issued standards on credit losses, hedging, and recognition and measurement including improvements resulting from various FASB Transition Resource Group meetings. Early adoption is permitted. The Company plans to adopt Topic 326 of this ASU, in conjunction with ASU No. 2016-13, on January 1, 2023. The adoption of Topic 815 and Topic 825 is not expected to have a material impact on the Company’s consolidated financial statements. In May 2019, the FASB issued ASU 2019-05, Financial Instruments-Credit Losses (Topic 326): Targeted Transition Relief . The amendments in this ASU provide entities that have certain instruments within the scope of Subtopic 326-20 with an option to irrevocably elect the fair value option in Subtopic 825-10, applied on an instrument-by-instrument basis for eligible instruments, upon the adoption of Topic 326. The fair value option election does not apply to held-to-maturity debt securities. An entity that elects the fair value option should subsequently measure those instruments at fair value with changes in fair value flowing through earnings. Due to the October 16, 2019 FASB board decision to approve extending the adoption date for certain registrants, including the Company, this ASU is effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. The ASU should be applied on a modified-retrospective basis by means of a cumulative-effect adjustment to the opening balance of retained earnings balance in the balance sheet. Early adoption is permitted. The Company is currently assessing the impact that ASU 2019-05 will have on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement . This ASU contains some technical adjustments related to the fair value disclosure requirements of public companies. Included in this ASU is the additional disclosure requirement of unrealized gains and losses for the period in recurring level 3 fair value disclosures and the range and weighted average of significant unobservable inputs, among other technical changes. ASU 2018-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted for any removed or modified disclosures. The adoption of ASU 2018-13 is not expected to have a material impact on the Company's consolidated financial statements. In August 2018, FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract . The amendments in this ASU broaden the scope of ASC Subtopic 350-40 to include costs incurred to implement a hosting arrangement that is a service contract. The amendments align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The costs are capitalized or expensed depending on the nature of the costs and the project stage during which they are incurred, consistent with the accounting for costs for internal-use software. The amendments in this ASU result in consistent capitalization of implementation costs of a hosting arrangement that is a service contract and implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this ASU. This ASU is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. The amendments in this ASU should be applied retrospectively to all implementation costs incurred after the date of adoption. Adoption of ASU 2018-15 is not expected to have a material impact on the Company’s consolidated financial statements. In Decembe r 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes . The amendments in this ASU simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740, Income Taxes. The amendments also improve consistent application or and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The Company does not expect the adoption of ASU 2019-12 to have a material impact on its consolidated financial statements.
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. Loans originated by the Company primarily secured by income producing properties, including retail centers, warehouses, and office buildings located in our market areas. Construction and Development Lending . Loans originated by the Company for the construction of, and secured by, commercial real estate, one-to-four-family, and multi-family residences and tracts of land for development that are not pre-sold. A small portion of the one-to-four-family construction portfolio is custom construction loans to the intended occupant of the residence. Home Equity Lending . Loans originated by the Company secured by second mortgages on one-to-four-family residences, including home equity lines of credit in our market areas. One-to-Four-Family Real Estate Lending . One-to-four-family residential loans include owner occupied properties (including second homes), and non-owner occupied properties with four or less units. These loans originated by the Company are secured by first mortgages on one-to-four-family residences in our market areas that the Company intends to hold (excludes loans held for sale). Multi-family Lending . Apartment term lending (five or more units) to current banking customers and community reinvestment loans for low to moderate income individuals in the Company’s footprint. Consumer Loans Indirect Home Improvement . Fixture secured loans for home improvement are originated by the Company through its network of home improvement contractors and dealers and are secured by the personal property installed in, on, or at the borrower’s real property, and may be perfected with a UCC‑2 financing statement filed in the county of the borrower’s residence. These indirect home improvement loans include replacement windows, siding, roofing, pools, and other home fixture installations. Solar. Fixture secured loans for solar related home improvement projects are originated by the Company through its network of contractors and dealers and are secured by the personal property installed in, on, or at the borrower’s real property, and which may be perfected with a UCC‑2 financing statement filed in the county of the borrower’s residence. Marine. Loans originated by the Company, secured by boats, to borrowers primarily located in the states the Company originates consumer loans. Other Consumer. Loans originated by the Company to consumers in our retail branch footprint, including automobiles, recreational vehicles, direct home improvement loans, loans on deposits, and other consumer loans, primarily consisting of personal lines of credit and credit cards. Commercial Business Loans Commercial and Industrial Lending (“C&I”) . Loans originated by the Company to local small- and mid-sized businesses in our Puget Sound market area are secured primarily by accounts receivable, inventory, or personal property, plant and equipment. Some of the C&I loans purchased by the Company are outside of the Greater Puget Sound market area. C&I loans are made on the basis of the borrower’s ability to make repayment from the cash flow of the borrower’s business. Warehouse Lending . Loans originated to non-depository financial institutions and secured by notes originated by the non-depository financial institution. The Company has two distinct warehouse lending divisions: commercial warehouse re-lending secured by notes on construction loans and mortgage warehouse re-lending secured by notes on one-to-four-family loans. The Company’s commercial construction warehouse lines are secured by notes on construction loans and typically guaranteed by principals with experience in construction lending. Mortgage warehouse lending loans are funded through third-party residential mortgage bankers. Under this program, the Company provides short-term funding to the mortgage banking companies for the purpose of originating residential mortgage loans for sale into the secondary market.
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. 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 graded “4” or “5” internally. Loans that are past due more than 90 days are classified “Substandard” 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. 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.
401 (k) Plan	401(k) Plan The Company has a salary deferral 401(k) Plan covering substantially all of its employees. Employees are eligible to participate in the 401(k) plan at the date of hire if they are 18 years of age. Eligible employees may contribute through payroll deductions and are 100% vested at all times in their deferral contributions account. The Company matches 100% for contributions of 1% to 3%, and 50% for contributions of 4% to 5%. There was a $1.2 million and $917,000 matching contribution for the years ended December 31, 2019 and 2018, respectively.
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 Available-for-Sale - The fair value of securities available-for-sale are recorded on a recurring basis. The fair value of investments and mortgage-backed securities are provided by a third-party pricing service. These valuations are based on market data using pricing models that vary by asset class and incorporate available current trade, bid and other market information, and for structured securities, cash flow, and loan performance data. The pricing processes utilize benchmark curves, benchmarking of similar securities, sector groupings, and matrix pricing. Option adjusted spread models are also used to assess the impact of changes in interest rates and to develop prepayment scenarios (Level 2). Certain other corporate securities and municipal bonds are generally measured at fair value based on discounted cash flow models (Level 3). Transfers between the fair value hierarchy are determined through the third-party service provider which, from time to time will transfer between levels based on market conditions per the related security. All models and processes used take into account market convention. Mortgage Loans Held for Sale - The fair value of loans held for sale reflects the value of commitments with investors and/or the relative price as delivered into a To-Be-Announced (“TBA”) mortgage-backed security (Level 2). Derivative Instruments - The fair value of the interest rate lock commitments and forward sales commitments are estimated using quoted or published market prices for similar instruments, adjusted for factors such as pull-through rate assumptions based on historical information, where appropriate. TBA mortgage-backed securities are fair valued on similar contracts in active markets (Level 2) while locks and forwards with customers and investors are fair valued using similar contracts in the market and changes in the market interest rates (Level 2 and 3). Impaired Loans - Fair value adjustments to impaired collateral dependent loans are recorded to reflect partial write-downs based on the current appraised value of the collateral or internally developed models, which contain management’s assumptions. Management will utilize discounted cashflow impairment for TDRs when the change in terms results in a discount to the overall cashflows to be received (Level 3). Other Real Estate Owned - Fair value adjustments to OREO are recorded at the lower of carrying amount of the loan or fair value of the collateral less selling costs. Any write-downs based on the asset’s fair value at the date of acquisition are charged to the allowance for loan losses. After foreclosure, management periodically performs valuations such that the real estate is carried at the lower of its new cost basis or fair value, net of estimated costs to sell (Level 3). Servicing Rights - The fair value of mortgage servicing rights are estimated using net present value of expected cash flows using a third party model that incorporates assumptions used in the industry to value such rights, adjusted for factors such as weighted average prepayments speeds based on historical information where appropriate (Level 3).

Business Combination (Tables)

Business Combination (Tables)	12 Months Ended
	Dec. 31, 2019
Business Combination [Abstract]
Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed at Acquisition	The following table summarizes the estimated fair values of assets acquired and liabilities assumed at the date of acquisition: Acquired Book Fair Value Amount November 15, 2018 Value Adjustments Recorded Assets Cash and cash equivalents $ 54,558 $ — $ 54,558 Securities available-for-sale 19,609 (54) 19,555 Loans receivable, net 361,596 (5,321) (1) 356,275 Premises and equipment, net 8,411 3,354 (2) 11,765 Other real estate owned 689 — 689 Deferred tax asset 4,097 (3,358) 739 Mortgage servicing rights 218 564 782 Core deposit intangible ("CDI") — 5,251 (3) 5,251 Other assets 25,231 18 25,249 Total assets acquired $ 474,409 $ 454 $ 474,863 Liabilities Deposits $ 357,863 $ (1,052) (4) $ 356,811 Borrowings 37,000 (282) 36,718 Other liabilities 9,286 63 9,349 Total liabilities assumed $ 404,149 $ (1,271) $ 402,878
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The following table summarizes the consideration paid, the aggregate amount recognized for each major class of assets acquired and liabilities assumed by 1st Security Bank in the Anchor Acquisition: At November 15, 2018 Purchase price of Anchor Fair value of FS Bancorp common stock at $46.54 (1) per share for 725,518 shares $ Cash paid Total purchase price Fair value of assets acquired: Cash and cash equivalents $ 54,558 Securities available-for-sale 19,555 Loans receivable, net 356,275 Premises and equipment 11,765 OREO 689 Deferred tax asset 739 Mortgage servicing rights 782 Intangible assets – CDI 5,251 Other assets 25,249 Total assets and identifiable intangible assets acquired $ 474,863 Fair value of liabilities assumed: Deposits $ 356,811 Borrowings 36,718 Other liabilities 9,349 Total liabilities assumed $ 402,878 Fair value of net assets and identifiable intangible assets acquired Bargain purchase gain $ _________________________ (1) Stock price is as of the closing date.

Securities Available-for-sale (

Securities Available-for-sale (Tables)	12 Months Ended
	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Schedule of Available-for-sale Securities Reconciliation	The following tables present the amortized costs, unrealized gains, unrealized losses, and estimated fair values of securities available-for-sale at December 31, 2019 and 2018: December 31, 2019 Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Values SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 8,986 $ 95 $ (15) $ 9,066 Corporate securities 10,525 52 (7) 10,570 Municipal bonds 20,516 604 — 21,120 Mortgage-backed securities 62,745 405 (300) 62,850 U.S. Small Business Administration securities 22,281 191 (21) 22,451 Total securities available-for-sale $ 125,053 $ 1,347 $ (343) $ 126,057 December 31, 2018 Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Values SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 16,052 $ 32 $ (197) $ 15,887 Corporate securities 7,074 — (209) 6,865 Municipal bonds 14,446 23 (275) 14,194 Mortgage-backed securities 45,827 83 (1,074) 44,836 U.S. Small Business Administration securities 15,690 — (267) 15,423 Total securities available-for-sale $ 99,089 $ 138 $ (2,022) $ 97,205
Schedule of Unrealized Loss on Investments	Investment securities that were in an unrealized loss position at December 31, 2019 and 2018 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. December 31, 2019 Less than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 2,977 $ (15) $ — $ — $ 2,977 $ (15) Corporate securities 1,993 (7) — — 1,993 (7) Mortgage-backed securities 12,345 (154) 11,459 (146) 23,804 (300) U.S. Small Business Administration securities 4,395 (21) — — 4,395 (21) Total $ 21,710 $ (197) $ 11,459 $ (146) $ 33,169 $ (343) December 31, 2018 Less than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 6,018 $ (25) $ 4,822 $ (172) $ 10,840 $ (197) Corporate securities 975 (25) 5,890 (184) 6,865 (209) Municipal bonds 2,098 (22) 8,787 (253) 10,885 (275) Mortgage-backed securities 6,266 (40) 32,537 (1,034) 38,803 (1,074) U.S. Small Business Administration securities 1,958 (11) 13,465 (256) 15,423 (267) Total $ 17,315 $ (123) $ 65,501 $ (1,899) $ 82,816 $ (2,022)
Schedule of Available for Sale Securities by Contractual Maturity	The contractual maturities of securities available-for-sale at December 31, 2019 and 2018 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. December 31, 2019 December 31, 2018 Amortized Fair Amortized Fair Cost Value Cost Value U.S. agency securities Due after one year through five years $ 996 $ 1,036 $ 1,043 $ 1,040 Due after five years through ten years 3,997 4,027 10,011 9,941 Due after ten years 3,993 4,003 4,998 4,906 Subtotal 8,986 9,066 16,052 15,887 Corporate securities Due in one year or less 5,034 5,044 — — Due after one year through five years 3,491 3,532 6,077 5,947 Due after five years through ten years 2,000 1,994 997 918 Subtotal 10,525 10,570 7,074 6,865 Municipal bonds Due after one year through five years 3,774 3,833 2,659 2,570 Due after five years through ten years 3,162 3,307 2,610 2,592 Due after ten years 13,580 13,980 9,177 9,032 Subtotal 20,516 21,120 14,446 14,194 Mortgage-backed securities Federal National Mortgage Association (“FNMA”) 42,131 42,333 30,554 30,026 Federal Home Loan Mortgage Corporation (“FHLMC”) 15,250 15,179 10,301 9,961 Government National Mortgage Association (“GNMA”) 5,364 5,338 4,972 4,849 Subtotal 62,745 62,850 45,827 44,836 U.S. Small Business Administration securities Due after one year through five years 1,546 1,555 — — Due after five years through ten years 11,500 11,598 13,828 13,581 Due after ten years 9,235 9,298 1,862 1,842 Subtotal 22,281 22,451 15,690 15,423 Total $ 125,053 $ 126,057 $ 99,089 $ 97,205
Schedule of Realized Gain (Loss)	The proceeds and resulting gains and losses, computed using specific identification from sales of securities available-for-sale for the years ended December 31, 2019 and 2018 were as follows: December 31, 2019 Proceeds Gross Gains Gross Losses Securities available-for-sale $ 10,554 $ 91 $ (59) December 31, 2018 Proceeds Gross Gains Gross Losses Securities available-for-sale $ 24,312 $ 185 $ (14)

Loans Receivable and Allowanc_2

Loans Receivable and Allowance For Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	The composition of the loan portfolio was as follows at December 31: December 31, December 31, 2019 2018 REAL ESTATE LOANS Commercial $ 210,749 $ 204,699 Construction and development 179,654 247,306 Home equity 38,167 40,258 One-to-four-family (excludes loans held for sale) 261,539 249,397 Multi-family 133,931 104,663 Total real estate loans 824,040 846,323 CONSUMER LOANS Indirect home improvement 210,653 167,793 Solar 44,038 44,433 Marine 67,179 57,822 Other consumer 4,340 5,425 Total consumer loans 326,210 275,473 COMMERCIAL BUSINESS LOANS Commercial and industrial 140,531 138,686 Warehouse lending 61,112 65,756 Total commercial business loans 201,643 204,442 Total loans receivable, gross 1,351,893 1,326,238 Allowance for loan losses (13,229) (12,349) Deferred costs and fees, net (3,273) (2,907) Premiums on purchased loans, net 955 1,537 Total loans receivable, net $ 1,336,346 $ 1,312,519
Allowance for Credit Losses on Financing Receivables	The following tables detail activity in the allowance for loan losses by loan categories for the years shown: At or For the Year Ended December 31, 2019 Commercial Real Estate Consumer Business Unallocated Total ALLOWANCE FOR LOAN LOSSES Beginning balance $ 5,761 $ 3,351 $ 3,191 $ 46 $ 12,349 Provision (recapture) for loan losses 439 838 1,646 (43) 2,880 Charge-offs (5) (1,040) (1,583) — (2,628) Recoveries 11 617 — — 628 Net recoveries (charge-offs) 6 (423) (1,583) — (2,000) Ending balance $ 6,206 $ 3,766 $ 3,254 $ 3 $ 13,229 Period end amount allocated to: Loans individually evaluated for impairment $ 15 $ 167 $ — $ — $ 182 Loans collectively evaluated for impairment 6,191 3,599 3,254 3 13,047 Ending balance $ 6,206 $ 3,766 $ 3,254 $ 3 $ 13,229 LOANS RECEIVABLE Loans individually evaluated for impairment $ 2,635 $ 493 $ — $ — $ 3,128 Loans collectively evaluated for impairment 821,405 325,717 201,643 — 1,348,765 Ending balance $ 824,040 $ 326,210 $ 201,643 $ — $ 1,351,893 At or For the Year Ended December 31, 2018 Commercial Real Estate Consumer Business Unallocated Total ALLOWANCE FOR LOAN LOSSES Beginning balance $ 4,770 $ 2,814 $ 2,014 $ 1,158 $ 10,756 Provision (recapture) for loan losses 953 526 1,173 (1,112) 1,540 Charge-offs (4) (936) — — (940) Recoveries 42 947 4 — 993 Net recoveries 38 11 4 — 53 Ending balance $ 5,761 $ 3,351 $ 3,191 $ 46 $ 12,349 Period end amount allocated to: Loans individually evaluated for impairment $ 125 $ 150 $ 700 $ — $ 975 Loans collectively evaluated for impairment 5,636 3,201 2,491 46 11,374 Ending balance $ 5,761 $ 3,351 $ 3,191 $ 46 $ 12,349 LOANS RECEIVABLE Loans individually evaluated for impairment $ 834 $ 428 $ 1,685 $ — $ 2,947 Loans collectively evaluated for impairment 845,489 275,045 202,757 — 1,323,291 Ending balance $ 846,323 $ 275,473 $ 204,442 $ — $ 1,326,238
Past Due Financing Receivables	The following tables provide information pertaining to the aging analysis of contractually past due loans and non-accrual loans for the years ended December 31, 2019 and 2018: December 31, 2019 30-59 60-89 Days Days 90 Days Total Total Past Past or More Past Loans Non- Due Due Past Due Due Current Receivable Accrual REAL ESTATE LOANS Commercial $ — $ — $ — $ — $ 210,749 $ 210,749 $ 1,086 Construction and development 533 — — 533 179,121 179,654 — Home equity 109 — 185 294 37,873 38,167 190 One-to-four-family 894 114 1,150 2,158 259,381 261,539 1,264 Multi-family — — — — 133,931 133,931 — Total real estate loans 1,536 114 1,335 2,985 821,055 824,040 2,540 CONSUMER LOANS Indirect home improvement 621 187 131 939 209,714 210,653 451 Solar 71 40 16 127 43,911 44,038 17 Marine 15 — — 15 67,164 67,179 — Other consumer 71 2 20 93 4,247 4,340 25 Total consumer loans 778 229 167 1,174 325,036 326,210 493 COMMERCIAL BUSINESS LOANS Commercial and industrial — — — — 140,531 140,531 — Warehouse lending — — — — 61,112 61,112 — Total commercial business loans — — — — 201,643 201,643 — Total loans $ 2,314 $ 343 $ 1,502 $ 4,159 $ 1,347,734 $ 1,351,893 $ 3,033 December 31, 2018 30-59 60-89 Days Days 90 Days Total Total Past Past or More Past Loans Non- Due Due Past Due Due Current Receivable Accrual REAL ESTATE LOANS Commercial $ — $ — $ — $ — $ 204,699 $ 204,699 $ — Construction and development — — — — 247,306 247,306 — Home equity 158 40 229 427 39,831 40,258 229 One-to-four-family 1,274 164 1,358 2,796 246,601 249,397 1,552 Multi-family — — — — 104,663 104,663 — Total real estate loans 1,432 204 1,587 3,223 843,100 846,323 1,781 CONSUMER LOANS Indirect home improvement 438 196 113 747 167,046 167,793 367 Solar 62 43 41 146 44,287 44,433 41 Marine 50 — — 50 57,772 57,822 18 Other consumer 69 24 11 104 5,321 5,425 2 Total consumer loans 619 263 165 1,047 274,426 275,473 428 COMMERCIAL BUSINESS LOANS Commercial and industrial — 431 — 431 138,255 138,686 1,685 Warehouse lending — — — — 65,756 65,756 — Total commercial business loans — 431 — 431 204,011 204,442 1,685 Total loans $ 2,051 $ 898 $ 1,752 $ 4,701 $ 1,321,537 $ 1,326,238 $ 3,894
Impaired Financing Receivables	The following tables provide additional information about our impaired loans that have been segregated to reflect loans for which an allowance for loan losses has been provided and loans for which no allowance was provided for the years ended December 31, 2019 and 2018: December 31, 2019 Unpaid Principal Recorded Related WITH NO RELATED ALLOWANCE RECORDED Balance Investment Allowance Real estate loans: Commercial $ 1,097 $ 1,086 $ — Home equity 278 225 — One-to-four-family 1,293 1,264 — Consumer loans: Other consumer 17 17 — 2,685 2,592 — WITH RELATED ALLOWANCE RECORDED Real estate loans: One-to-four-family 61 60 15 Consumer loans: Indirect 451 451 158 Solar 17 17 6 Other consumer 8 8 3 537 536 182 Total $ 3,222 $ 3,128 $ 182 December 31, 2018 Unpaid Principal Recorded Related WITH NO RELATED ALLOWANCE RECORDED Balance Investment Allowance Real estate loans: Home equity $ 305 $ 229 $ — One-to-four-family 991 718 Commercial business loans: Commercial and industrial 431 431 — 1,727 1,378 — WITH RELATED ALLOWANCE RECORDED Real estate loans: One-to-four-family 834 834 125 Consumer loans: Indirect 367 367 128 Solar 41 41 15 Marine 18 18 6 Other consumer 2 2 1 Commercial business loans: Commercial and industrial 1,254 1,254 700 2,516 2,516 975 Total $ 4,243 $ 3,894 $ 975 The following table presents the average recorded investment in loans individually evaluated for impairment and the interest income recognized and received for the years ended December 31, 2019 and 2018: At or For the Year Ended December 31, 2019 December 31, 2018 Average Recorded Interest Income Average Recorded Interest Income Investment Recognized Investment Recognized WITH NO RELATED ALLOWANCE RECORDED Real estate loans: Commercial $ 90 $ 56 $ — $ — Home equity 206 3 404 8 One-to-four-family 1,500 34 719 — Consumer loans: Other consumer 4 2 — — Commercial business loans: Commercial and industrial 180 — 431 22 1,980 95 1,554 30 WITH RELATED ALLOWANCE RECORDED Real estate loans: One-to-four-family 5 5 1,030 28 Consumer loans: Indirect 427 41 295 32 Solar 36 1 31 3 Marine 13 — 11 2 Other consumer 5 1 1 — Commercial business loans: Commercial and industrial 96 — 757 59 582 48 2,125 124 Total $ 2,562 $ 143 $ 3,679 $ 154
Financing Receivable Credit Quality Indicators	The following tables summarize risk rated loan balances by category at the dates indicated: December 31, 2019 Special Pass Watch Mention Substandard Doubtful Loss (1 - 5) (6) (7) (8) (9) (10) Total REAL ESTATE LOANS Commercial $ 203,703 $ 2,274 $ 3,686 $ 1,086 $ — $ — $ 210,749 Construction and development 177,109 2,545 — — — — 179,654 Home equity 37,942 — 35 190 — — 38,167 One-to-four-family 259,580 635 60 1,264 — — 261,539 Multi-family 127,792 6,139 — — — — 133,931 Total real estate loans 806,126 11,593 3,781 2,540 — — 824,040 CONSUMER LOANS Indirect home improvement 210,202 — — 451 — — 210,653 Solar 44,021 — — 17 — — 44,038 Marine 67,179 — — — — — 67,179 Other consumer 4,315 — — 25 — — 4,340 Total consumer loans 325,717 — — 493 — — 326,210 COMMERCIAL BUSINESS LOANS Commercial and industrial 125,025 10,435 1,442 3,629 — — 140,531 Warehouse lending 61,112 — — — — — 61,112 Total commercial business loans 186,137 10,435 1,442 3,629 — — 201,643 Total loans receivable, gross $ 1,317,980 $ 22,028 $ 5,223 $ 6,662 $ — $ — $ 1,351,893 December 31, 2018 Special Pass Watch Mention Substandard Doubtful Loss (1 - 5) (6) (7) (8) (9) (10) Total REAL ESTATE LOANS Commercial $ 203,557 $ 1,142 $ — $ — $ — $ — $ 204,699 Construction and development 244,577 2,729 — — — — 247,306 Home equity 39,846 — 183 229 — — 40,258 One-to-four-family 247,575 207 63 1,552 — — 249,397 Multi-family 103,447 1,216 — — — — 104,663 Total real estate loans 839,002 5,294 246 1,781 — — 846,323 CONSUMER LOANS Indirect home improvement 167,426 — — 367 — — 167,793 Solar 44,392 — — 41 — — 44,433 Marine 57,804 — — 18 — — 57,822 Other consumer 5,415 — 8 2 — — 5,425 Total consumer loans 275,037 — 8 428 — — 275,473 COMMERCIAL BUSINESS LOANS Commercial and industrial 124,089 8,813 — 5,784 — — 138,686 Warehouse lending 65,756 — — — — — 65,756 Total commercial business loans 189,845 8,813 — 5,784 — — 204,442 Total loans receivable, gross $ 1,303,884 $ 14,107 $ 254 $ 7,993 $ — $ — $ 1,326,238
Schedule of Related Party Loans	Outstanding loan balances were as follows and were within regulatory limitations: At December 31, 2019 2018 Beginning balance $ 3,325 $ 655 Additions — 2,688 Repayments (76) (18) Ending balance $ 3,249 $ 3,325

Servicing Rights (Tables)

Servicing Rights (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Summary of servicing rights activity	The following table summarizes servicing rights activity for the years ended December 31, 2019 and 2018: 2019 2018 Beginning balance $ 10,429 $ 6,795 Additions 5,400 5,971 Servicing rights amortized (4,177) (2,337) Impairment of servicing rights (92) — Ending balance $ 11,560 $ 10,429
Key economic assumptions and the sensitivity of the current fair value for single family mortgage servicing rights	Key economic assumptions and the sensitivity of the current fair value for single family MSR to immediate adverse changes in those assumptions at December 31, 2019 and December 31, 2018 were as follows: December 31, 2019 December 31, 2018 Aggregate portfolio principal balance $ 1,463,732 $ 1,186,858 Weighted average rate of note 4.2 % % At December 31, 2019 Base 0.5% Adverse Rate Change 1.0% Adverse Rate Change Conditional prepayment rate 17.1 % 24.6 % 32.5 % Fair value MSR $ 13,255 $ 10,582 $ 8,674 Percentage of MSR 0.9 % 0.7 % 0.6 % Discount rate 9.7 % 10.2 % 10.7 % Fair value MSR $ 13,255 $ 13,037 $ 12,826 Percentage of MSR 0.9 % 0.9 % 0.9 % At December 31, 2018 Base 0.5% Adverse Rate Change 1.0% Adverse Rate Change Conditional prepayment rate 9.4 % 11.6 % 17.7 % Fair value MSR $ 14,218 $ 12,723 $ 10,358 Percentage of MSR 1.2 % 1.1 % 0.9 % Discount rate 9.6 % 10.1 % 10.6 % Fair value MSR $ 14,218 $ 13,912 $ 13,617 Percentage of MSR 1.2 % 1.2 % 1.2 %
Mortgage servicing rights
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation assumptions	The following provides valuation assumptions used in determining the fair value of mortgage servicing rights (“MSR”) at the dates indicated: At December 31, At December 31, 2019 2018 Key assumptions: Weighted average discount rate 9.7 % 9.6 % Conditional prepayment rate (“CPR”) 17.1 % 9.4 % Weighted average life in years 5.1 7.7

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Schedule of Premises and Equipment	Premises and equipment at December 31, 2019 and 2018 were as follows: 2019 2018 Land $ 5,227 $ 5,227 Buildings 16,769 16,772 Furniture, fixtures, and equipment 13,562 12,039 Leasehold improvements 2,848 2,422 Building improvements 6,572 5,897 Projects in process 407 674 Subtotal 45,385 43,031 Less accumulated depreciation and amortization (16,615) (13,921) Total $ 28,770 $ 29,110

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Summary of lease cost	The components of lease cost (included in occupancy expense on the Consolidated Statements of Income) are as follows for the year ended December 31, 2019: Year Ended December 31, 2019 Lease cost: Operating lease cost $ 1,285 Short-term lease cost 166 Total lease cost $ 1,451
Supplemental information related to operating leases	The following table provides supplemental information related to operating leases at or for the year ended December 31, 2019: At or For the Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 1,331 Weighted average remaining lease term- operating leases 5.3 years Weighted average discount rate- operating leases 3.0 %
Summary of maturities of operating lease liabilities	Maturities of operating lease liabilities at December 31, 2019 for future periods are as follows: 2020 $ 1,298 2021 1,169 2022 1,065 2023 674 2024 614 Thereafter 884 Total lease payments 5,704 Less imputed interest (490) Total $ 5,214

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	12 Months Ended
	Dec. 31, 2019
Banking and Thrift [Abstract]
Schedule of Other Real Estate Owned	The following table presents the activity related to OREO at and for the years ended December 31: At or For the Year Ended December 31, 2019 2018 Beginning balance $ 689 $ — Additions 242 689 Gross proceeds from sale of OREO (901) — Gain on sale of OREO 138 — Ending balance $ 168 $ 689

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2019
Banking and Thrift [Abstract]
Schedule of Deposit Liabilities	Deposits are summarized as follows at December 31: December 31, December 31, 2019 (1)(2) 2018 (1)(2) Noninterest-bearing checking $ 260,131 $ 221,107 Interest-bearing checking 177,972 151,103 Savings 118,845 122,344 Money market (3) 270,489 282,595 Certificates of deposit less than $100,000 (4) 277,988 243,193 Certificates of deposit of $100,000 through $250,000 181,402 154,095 Certificates of deposit of $250,000 and over (5) 92,110 86,357 Escrow accounts related to mortgages serviced 13,471 13,425 Total $ 1,392,408 $ 1,274,219 ________________________ (1) Includes $117.1 million and $120.0 million of deposits at December 31, 2019 and 2018, respectively, remaining from the January 22, 2016 purchase of four retail bank branches from Bank of America, N.A. (the “Branch Purchase”). (2) Includes $299.0 million and $321.1 million of deposits at December 31, 2019 and 2018, respectively, from the Anchor Acquisition. (3) Includes $6.2 million and $1,000 of brokered deposits at December 31, 2019 and 2018, respectively. (4) Includes $141.4 million and $116.7 million of brokered deposits at December 31, 2019 and 2018, respectively. (5) Time deposits that meet or exceed the FDIC insurance limit.
Schedule of Maturities of Time Deposits for Future Periods	Scheduled maturities of time deposits at December 31, 2019 for future years ending are as follows: At December 31, 2019 Maturing in 2020 $ 357,786 Maturing in 2021 103,560 Maturing in 2022 57,972 Maturing in 2023 15,120 Maturing in 2024 17,062 Thereafter — Total $ 551,500
Schedule of Interest Expense by Deposit Category	Interest expense by deposit category for the years ended December 31, 2019 and 2018 is as follows: 2019 2018 Interest-bearing checking $ 1,414 $ 227 Savings and money market 3,098 2,054 Certificates of deposit 11,650 5,040 Total $ 16,162 $ 7,321

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Advances on Borrowing Line	Advances on these lines at December 31, 2019 and 2018 were as follows: 2019 2018 Federal Home Loan Bank - (interest rates ranging from 1.58% to 2.87% and 1.15% to 2.87% at December 31, 2019 and 2018, respectively) $ 84,864 $ 137,149 Total $ 84,864 $ 137,149
Debt with Maximum and Average Balances	The maximum and average outstanding and weighted average interest rates on debt during the years ended December 31, 2019 and 2018 were as follows: 2019 2018 Maximum balance: Federal Home Loan Bank advances and Fed Funds $ 186,401 $ 180,025 Federal Reserve Bank $ 5,000 $ — Fed Funds lines of credit $ 5,000 $ 21,016 Subordinated note $ 10,000 $ 10,000 Average balance: Federal Home Loan Bank advances and Fed Funds $ 93,653 $ 96,044 Federal Reserve Bank $ 167 $ — Fed Funds lines of credit $ 318 $ 5,286 Subordinated note $ 10,000 $ 10,000 Weighted average interest rate: Federal Home Loan Bank advances and Fed Funds 2.61 % 2.02 % Federal Reserve Bank 2.96 % — % Fed Funds lines of credit 2.09 % 1.93 % Subordinated note 6.50 % 6.50 %
Schedule of Federal Home Loan Bank Advances Maturities Summary Due	Scheduled maturities of Federal Home Loan Bank advances were as follows: Interest Years Ending December 31, Balances Rates 2020 $ 12,336 2.46 % 2021 45,000 2.48 % 2022 — — % 2023 13,633 2.03 % 2024 13,895 1.77 % Total $ 84,864

Employee Benefits (Tables)

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2019
Compensation and Retirement Disclosure [Abstract]
Schedule of Shares Under ESOP	Shares held by the ESOP at December 31, 2019 and December 31, 2018, were as follows (shown as actual): Balances Balances at December 31, 2019 at December 31, 2018 Allocated shares 189,511 176,809 Committed to be released shares — — Unallocated shares 51,842 77,763 Total ESOP shares 241,353 254,572 Fair value of unallocated shares (in thousands) $ 3,006 $ 3,627

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
INCOME TAXES
Schedule of Components of Income Tax Expense (Benefit)	The components of income tax expense for the years ended December 31, 2019 and 2018, were as follows: 2019 2018 Provision for income taxes Current $ 4,425 $ 3,455 Deferred 988 768 Total provision for income taxes $ 5,413 $ 4,223
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of the effective income tax rate with the federal statutory tax rates at December 31, 2019 and 2018 was as follows: 2019 2018 Amount Rate Amount Rate Income tax provision at statutory rate $ 5,907 21.0 % $ 6,000 21.0 % Tax exempt income (225) (0.8) (129) (0.5) Nondeductible items resulting in increase in tax 129 0.5 279 1.0 Decrease in tax resulting from other items (78) (0.3) (87) (0.3) Equity compensation (691) (2.5) (571) (2.0) Executive compensation 112 0.4 135 0.5 Bargain purchase gain — — (1,594) (5.6) ESOP 259 0.9 190 0.7 Total $ 5,413 19.2 % $ 4,223 14.8 %
Schedule of Deferred Tax Assets and Liabilities	Total deferred tax assets and liabilities at December 31, 2019 and 2018 were as follows: 2019 2018 Deferred Tax Assets Net operating loss carryforward $ 864 $ 1,201 Allowance for loan losses 2,844 2,301 Purchase accounting adjustments 466 776 Other real estate owned 126 127 Non-accrued loan interest 13 115 Restricted stock awards 68 54 Non-qualified stock options 185 71 Securities available-for-sale — 405 Lease liability 1,121 — Other 351 473 Total deferred tax assets 6,038 5,523 Deferred Tax Liabilities Loan origination costs (1,341) (626) Servicing rights (2,525) (2,241) Prepaids — (166) Stock dividend - FHLB stock (59) (73) Property, plant, and equipment (1,362) (1,489) Purchase accounting adjustments (1,404) (1,289) Securities available-for-sale (216) — Lease right-of-use assets (1,078) — Other (24) — Total deferred tax liabilities (8,009) (5,884) Net deferred tax liabilities $ (1,971) $ (361)

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of Commitments to Extend Credit	The following table provides a summary of the Company’s commitments at December 31, 2019 and 2018: December 31, December 31, 2019 2018 COMMITMENTS TO EXTEND CREDIT REAL ESTATE LOANS Commercial $ 247 $ 5,836 Construction and development 95,031 76,889 One-to-four-family (includes locks for salable loans) 39,697 35,714 Home equity 47,880 41,204 Multi-family 622 515 Total real estate loans 183,477 160,158 CONSUMER LOANS 22,176 18,560 COMMERCIAL BUSINESS LOANS Commercial and industrial 72,731 72,880 Warehouse lending 33,888 44,243 Total commercial business loans 106,619 117,123 Total commitments to extend credit $ 312,272 $ 295,841

Regulatory Capital (Tables)

Regulatory Capital (Tables)	12 Months Ended
	Dec. 31, 2019
Regulatory Capital Requirements [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The following table compares the Bank’s actual capital amounts and ratios at December 31, 2019 and 2018 to their minimum regulatory capital requirements and well capitalized regulatory capital at those dates (dollars in thousands): To be Well Capitalized Under Prompt For Capital For Capital Adequacy Corrective Actual Adequacy Purposes with Capital Buffer Action Provisions Bank Only Amount Ratio Amount Ratio Amount Ratio Amount Ratio At December 31, 2019 Total risk-based capital (to risk-weighted assets) $ 209,535 14.64 % $ 114,502 8.00 % $ 150,283 10.50 % $ 143,127 10.00 % Tier 1 risk-based capital (to risk-weighted assets) $ 196,013 13.70 % $ 85,876 6.00 % $ 121,658 8.50 % $ 114,502 8.00 % Tier 1 leverage capital (to average assets) $ 196,013 11.56 % $ 67,808 4.00 % $ N/A N/A $ 84,761 5.00 % CET 1 capital (to risk-weighted assets) $ 196,013 13.70 % $ 64,407 4.50 % $ 100,189 7.00 % $ 93,033 6.50 % At December 31, 2018 Total risk-based capital (to risk-weighted assets) $ 188,472 13.52 % $ 111,493 8.00 % $ 137,694 9.88 % $ 139,366 10.00 % Tier 1 risk-based capital (to risk-weighted assets) $ 175,824 12.62 % $ 83,620 6.00 % $ 109,820 7.88 % $ 111,493 8.00 % Tier 1 leverage capital (to average assets) $ 175,824 10.67 % $ 65,884 4.00 % $ N/A N/A $ 82,355 5.00 % CET 1 capital (to risk-weighted assets) $ 175,824 12.62 % $ 62,715 4.50 % $ 88,846 6.38 % $ 90,588 6.50 %

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2019
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	The following table presents assets and liabilities measured at fair value on a recurring basis at the dates indicated: At December 31, 2019 Financial Assets Level 1 Level 2 Level 3 Total Securities available-for-sale U.S. agency securities $ — $ 9,066 $ — $ 9,066 Corporate securities — 9,546 1,024 10,570 Municipal bonds — 20,982 138 21,120 Mortgage-backed securities — 62,850 — 62,850 U.S. Small Business Administration securities — 22,451 — 22,451 Mortgage loans held for sale, at fair value — 69,699 — 69,699 Derivatives Interest rate lock commitments with customers — — 557 557 Total assets measured at fair value $ — $ 194,594 $ 1,719 $ 196,313 Financial Liabilities Derivatives Individual forward sale commitments with investors $ — $ (8) $ (195) $ (203) Total liabilities measured at fair value $ — $ (8) $ (195) $ (203) At December 31, 2018 Financial Assets Level 1 Level 2 Level 3 Total Securities available-for-sale U.S. agency securities $ — $ 15,887 $ — $ 15,887 Corporate securities — 6,865 — 6,865 Municipal bonds — 14,194 — 14,194 Mortgage-backed securities — 44,836 — 44,836 U.S. Small Business Administration securities — 15,423 — 15,423 Mortgage loans held for sale, at fair value — 51,195 — 51,195 Derivatives Interest rate lock commitments with customers — — 503 503 Total assets measured at fair value $ — $ 148,400 $ 503 $ 148,903 Financial Liabilities Derivatives Individual forward sale commitments with investors $ — $ (540) $ (34) $ (574) Total liabilities measured at fair value $ — $ (540) $ (34) $ (574)
Schedule of Valuation Allowance for Impairment of Recognized Servicing Assets	The following table presents 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. December 31, 2019 Level 1 Level 2 Level 3 Total Impaired loans $ — $ — $ 3,128 $ 3,128 OREO — — 168 168 Servicing rights — — 13,255 13,255 December 31, 2018 Level 1 Level 2 Level 3 Total Impaired loans $ — $ — $ 3,894 $ 3,894 OREO — — 689 689 Servicing rights — — 14,593 14,593
Fair value reconciliation - Level 3 on recurring basis	The following table provides a reconciliation of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the years ended December 31, 2019 and 2018. Net change in fair value for gains/ (losses) relating to Purchases items held at end of Beginning and Sales and Transfers Ending year included in Balance Issuances Settlements In Balance income 2019 Interest rate lock commitments with customers $ 503 $ 11,063 $ (11,009) $ — $ 557 $ 54 Individual forward sale commitments with investors (34) (1,444) 1,283 — (195) (161) Securities available-for-sale, at fair value — — — 1,162 1,162 — 2018 Interest rate lock commitments with customers $ 726 $ 9,722 $ (9,945) $ — $ 503 $ (223) Individual forward sale commitments with investors 51 850 (935) — (34) (85)
Fair Value, by Balance Sheet Grouping	The following table provides estimated fair values of the Company’s financial instruments at December 31, 2019 and 2018, whether or not recognized at fair value in the Consolidated Balance Sheets: December 31, December 31, 2019 2018 Carrying Fair Carrying Fair Amount Value Amount Value Financial Assets Level 1 inputs: Cash and cash equivalents $ 45,778 $ 45,778 $ $ Certificates of deposit at other financial institutions 20,902 20,902 Level 2 inputs: Securities available-for-sale, at fair value 124,895 124,895 Loans held for sale, at fair value 69,699 69,699 FHLB stock, at cost 8,045 8,045 Accrued interest receivable 5,908 5,908 Level 3 inputs: Securities available-for-sale, at fair value 1,162 1,162 — — Loans receivable, gross 1,351,893 1,377,408 Servicing rights, held at lower of cost or fair value 11,560 13,255 Fair value interest rate locks with customers 557 557 Financial Liabilities Level 2 inputs: Deposits 1,392,408 1,385,658 Borrowings 84,864 85,268 Subordinated note 9,885 10,599 Accrued interest payable 273 273 Paired off commitments with investors 71 71 Individual forward sale commitments with investors 8 8 Level 3 inputs: Individual forward sale commitments with investors 195 195
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation assumptions	Shown in the table below is the fair value of financial instruments measured under a Level 3 unobservable input on a recurring and nonrecurring basis at December 31, 2019 and 2018: Level 3 Significant Weighted Average Fair Value Valuation Unobservable December 31, December 31, Instruments Techniques Inputs Range 2019 2018 RECURRING Interest rate lock commitments with customers Quoted market prices Pull-through expectations 80% - 99% 94.5 % 95.2 % Individual forward sale commitments with investors Quoted market prices Pull-through expectations 80% - 99% 94.5 % 95.2 % Corporate securities Discounted cash flows Discount rate 2.1% 2.1 % — Municipal bonds Discounted cash flows Discount rate 3.0% - 3.7% 3.4 % — NONRECURRING Impaired loans Fair value of underlying collateral Discount applied to the obtained appraisal 0% - 50% 10.0 % 10.0 % OREO Fair value of collateral Discount applied to the obtained appraisal 0% - 75% 10.0 % 10.0 % Servicing rights Industry sources Pre-payment speeds 0% - 50% 17.1 % 9.4 %

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table presents a reconciliation of the components used to compute basic and diluted earnings per share for the years ended December 31, 2019 and 2018: At or For the Year Ended December 31, Numerator (in thousands): 2019 2018 Net income $ 22,717 $ 24,347 Dividends and undistributed earnings allocated to participating securities (73) — Net income available to common shareholders $ 22,644 $ 24,347 Denominator (shown as actual): Basic weighted average common shares outstanding 4,414,032 3,698,623 Dilutive shares 108,992 171,166 Diluted weighted average common shares outstanding 4,523,024 3,869,789 Basic earnings per share $ 5.13 $ 6.58 Diluted earnings per share $ 5.01 $ 6.29 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 36,337 11,326

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following tables summarize the Company’s derivative instruments at the dates indicated: December 31, 2019 Fair Value Notional Asset Liability Fallout adjusted interest rate lock commitments with customers $ 33,914 $ 557 $ — Mandatory and best effort forward commitments with investors 43,752 — 195 Forward TBA mortgage-backed securities 46,000 — 8 December 31, 2018 Fair Value Notional Asset Liability Fallout adjusted interest rate lock commitments with customers $ 29,432 $ 503 $ — Mandatory and best effort forward commitments with investors 24,776 — 34 Forward TBA mortgage-backed securities 51,500 — 540

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Awards	Year Ended December 31, Year Ended December 31, 2019 2018 Dividend yield Expected volatility Risk-free interest rate Expected term in years 6.5 6.5 Weighted-average grant date fair value per option granted $ $ The following table presents a summary of the Company’s stock option plan awards during the year ended December 31, 2019 (shown as actual): Weighted-Average Weighted- Remaining Average Contractual Term In Aggregate Shares Exercise Price Years Intrinsic Value Outstanding at January 1, 2019 290,104 $ 31.27 6.83 $ 4,940,803 Granted 50,655 48.74 — — Less exercised 52,769 $ 16.89 — $ 1,799,754 Forfeited or expired — — — — Outstanding at December 31, 2019 287,990 $ 36.98 6.77 $ 7,722,369 Expected to vest, assuming a 0.31% annual forfeiture rate (1) 287,067 $ 36.92 6.76 $ 7,713,673 Exercisable at December 31, 2019 157,335 $ 22.19 4.90 $ 6,544,812 _________________________ (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	The following table presents a summary of the Company’s nonvested awards during the year ended December 31, 2019 (shown as actual): Weighted-Average Grant-Date Fair Value Nonvested Shares Shares Per Share Nonvested at January 1, 2019 43,421 $ 41.22 Granted 20,215 $ 48.74 Less vested 23,421 $ 26.38 Forfeited or expired — — Nonvested at December 31, 2019 40,215 $ 53.64

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	At or For the Year Ended December 31, 2019 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 6,307 $ 64,001 $ 70,308 Provision for loan losses (2) (433) (2,447) (2,880) Noninterest income 13,209 9,826 23,035 Noninterest expense (14,283) (48,050) (62,333) Income before provision for income taxes 4,800 23,330 28,130 Provision for income taxes (924) (4,489) (5,413) Net income $ 3,876 $ 18,841 $ 22,717 Total assets $ 312,404 $ 1,400,652 $ 1,713,056 Total average assets for year ended $ 272,901 $ 1,377,468 $ 1,650,369 FTEs 127 325 452 At or For the Year Ended December 31, 2018 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 3,324 $ 48,774 $ 52,098 Provision for loan losses (224) (1,316) (1,540) Noninterest income (3) 14,025 12,825 26,850 Noninterest expense (15,894) (32,944) (48,838) Income before provision for income taxes 1,231 27,339 28,570 Provision for income taxes (182) (4,041) (4,223) Net income $ 1,049 $ 23,298 $ 24,347 Total assets $ 246,280 $ 1,375,364 $ 1,621,644 Total average assets for year ended $ 229,661 $ 945,052 $ 1,174,713 FTEs 115 309 424 ___________________________ (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. (2) The allocated provision for loan losses is partially associated with one-to-four-family, and home equity loans acquired from Anchor Bank totaling $198.5 million at December 31, 2019. (3) Barg ain purchase gain of $7.4 million was included in the commercial and consumer banking segment.

Revenue From Contracts With C_2

Revenue From Contracts With Customers (Tables)	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Schedule of noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606	The following table presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the years ended December 31, 2019 and 2018: At or For the Year Ended December 31, (Dollars in thousands): 2019 2018 Noninterest Income In-scope of Topic 606: Debit card interchange fees $ 1,848 $ 1,184 Fees from non-sufficient funds 1,065 561 Noninterest Income (in-scope of Topic 606) 2,913 1,745 Noninterest Income (out-of-scope of Topic 606) 20,122 25,105 Total Noninterest Income $ 23,035 $ 26,850

Goodwill And Other Intangible_2

Goodwill And Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
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, 2017 $ 2,239 $ (922) $ 1,317 Amortization — (307) (307) Additions as a result of the Anchor Acquisition 5,251 (44) 5,207 Balance, December 31, 2018 7,490 (1,273) 6,217 Amortization — (760) (760) Balance, December 31, 2019 $ 7,490 $ (2,033) $ 5,457
Schedule of Amortization Expense	Amortization expense for the CDI is expected to be as follows for the years ended December 31: 2020 $ 706 2021 691 2022 691 2023 691 2024 621 Thereafter 2,057 Total $ 5,457

Parent Company Only Financial_2

Parent Company Only Financial Information (Tables)	12 Months Ended
	Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Schedule of Condensed Balance Sheet	Condensed Balance Sheets December 31, Assets 2019 2018 Cash and due from banks $ 5,568 $ 7,026 Investment in subsidiary 204,570 182,874 Other assets 172 175 Total assets $ 210,310 $ 190,075 Liabilities and Stockholders' Equity Subordinated note, net 9,885 9,865 Other liabilities 183 172 Total liabilities 10,068 10,037 Stockholders' equity 200,242 180,038 Total liabilities and stockholders' equity $ 210,310 $ 190,075
Schedule of Condensed Statements of Income	Condensed Statements of Income Year Ended December 31, 2019 2018 Interest from subsidiary $ 2 $ 2 Interest expense on subordinated note (679) (679) Dividends received from subsidiary 3,935 1,436 Other expenses (142) (157) Income before income tax benefit and equity in undistributed net income of subsidiary 3,116 602 Income tax benefit 172 175 Equity in undistributed earnings of subsidiary 19,429 23,570 Net income $ 22,717 $ 24,347
Schedule of Condensed Statements of Cash Flows	Condensed Statements of Cash Flows Year Ended December 31, 2019 2018 Cash flows from operating activities: Net income $ 22,717 $ 24,347 Equity in undistributed net income of subsidiary (19,429) (23,570) Amortization 20 20 ESOP compensation expense for allocated shares 1,231 940 Share-based compensation expense related to stock options and restricted stock 869 767 Other assets 3 115 Other liabilities 11 6 Net cash from operating activities 5,422 2,625 Cash flows from investing activities: Net proceeds from ESOP 275 269 Net cash from investing activities 275 269 Cash flows (used by) from financing activities: Proceeds from stock options exercised 705 1,117 Common stock repurchased for employee/director taxes paid on restricted stock awards (204) (251) Common stock repurchased (4,800) — Dividends paid on common stock (2,856) (1,915) Net cash (used by) from financing activities (7,155) (1,049) Net (decrease) increase in cash and cash equivalents (1,458) 1,845 Cash and cash equivalents, beginning of year 7,026 5,181 Cash and cash equivalents, end of year $ 5,568 $ 7,026

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2019USD ($)segmentOfficeitem	Dec. 31, 2018USD ($)	Jan. 01, 2019USD ($)	Jan. 22, 2016item
Schedule of Accounting Policies [Line Items]
Number of operating segments | segment	2
Cash and due from banks and interest-bearing deposits in excess of FDIC insured limits	$ 8,600,000	$ 25,000
FHLB investment requirement, capital stock amount	$ 1,900,000
FHLB investment requirement, percent of advances from FHLB	4.00%
Federal Home Loan Bank Stock.	$ 8,045,000	9,887,000
Impairment of FHLB stock	$ 0	0
Maximum term interest is accrued on delinquent loan	90 days
Maximum term delinquent loan is returned to accrual status	90 days
Minimum term delinquent loan performs under contract terms and returned to accrual status	6 months
Cash on hand and deposit balances with FRB	$ 0	17,400,000
Marketing and advertising	678,000	747,000
Goodwill, Impairment Loss	0	$ 0
Operating lease right-of-use ("ROU") assets	5,016,000
Operating lease liabilities	$ 5,214,000
ASU No. 2016 | Restatement
Schedule of Accounting Policies [Line Items]
Operating lease right-of-use ("ROU") assets			$ 5,100,000
Operating lease liabilities			$ 5,000,000
Impact on balance sheet (as a percent)			0.30%
Building and building improvements | Minimum
Schedule of Accounting Policies [Line Items]
Useful life	25 years
Building and building improvements | Maximum
Schedule of Accounting Policies [Line Items]
Useful life	40 years
Furniture, fixtures and equipment | Minimum
Schedule of Accounting Policies [Line Items]
Useful life	3 years
Furniture, fixtures and equipment | Maximum
Schedule of Accounting Policies [Line Items]
Useful life	10 years
Puget Sound [Member]
Schedule of Accounting Policies [Line Items]
Number of bank branches | item	21
Number of administrative offices that accept deposits | Office	1
Number of loan production offices | item	7
Tri-Cities, Washington [Member]
Schedule of Accounting Policies [Line Items]
Number of loan production offices | item	1
Bank of America
Schedule of Accounting Policies [Line Items]
Number of bank branches | item				4

Business Combination - Estimate

Business Combination - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Nov. 15, 2018	Dec. 31, 2018	Dec. 31, 2019
Business Acquisition [Line Items]
Bargain purchase gain		$ 7,414
Certificates of deposit			$ 551,500
Anchor Bancorp
Business Acquisition [Line Items]
Cash and cash equivalents	$ 54,558
Securities available-for-sale	19,555
Loans receivable, net	356,275
Premises and equipment	11,765
Other real estate owned ("OREO")	689
Deferred tax asset	739
Mortgage servicing rights	782
Core deposit intangible ("CDI")	5,251
Other assets	25,249
Total assets acquired	474,863
Deposits	356,811	$ 321,100	$ 299,000
Borrowings	36,718
Other liabilities	9,349
Total liabilities assumed	402,878
Total fair value of identifiable net assets	71,985
Bargain purchase gain	$ 7,414
Pre-tax discount of time deposits to core deposits (as a percent)	0.65%
Certificates of deposit	$ 162,900
Acquired Book Value | Anchor Bancorp
Business Acquisition [Line Items]
Cash and cash equivalents	54,558
Securities available-for-sale	19,609
Loans receivable, net	361,596
Premises and equipment	8,411
Other real estate owned ("OREO")	689
Deferred tax asset	4,097
Mortgage servicing rights	218
Other assets	25,231
Total assets acquired	474,409
Deposits	357,863
Borrowings	37,000
Other liabilities	9,286
Total liabilities assumed	404,149
Fair Value Adjustments | Anchor Bancorp
Business Acquisition [Line Items]
Securities available-for-sale	(54)
Loans receivable, net	(5,321)
Premises and equipment	3,354
Deferred tax asset	(3,358)
Mortgage servicing rights	564
Core deposit intangible ("CDI")	5,251
Other assets	18
Total assets acquired	454
Deposits	(1,052)
Borrowings	(282)
Other liabilities	63
Total liabilities assumed	(1,271)
Carrying Amount | Anchor Bancorp
Business Acquisition [Line Items]
Cash and cash equivalents	54,558
Securities available-for-sale	19,555
Loans receivable, net	356,275
Premises and equipment	11,765
Other real estate owned ("OREO")	689
Deferred tax asset	739
Mortgage servicing rights	782
Core deposit intangible ("CDI")	5,251
Other assets	25,249
Total assets acquired	474,863
Deposits	356,811
Borrowings	36,718
Other liabilities	9,349
Total liabilities assumed	$ 402,878
Interest Expense [Member] | Anchor Bancorp
Business Acquisition [Line Items]
Estimated amortization period	10 years

Business Combination - Amount R

Business Combination - Amount Recognized for Assets Acquired and Liabilities Assumed (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 15, 2018	Dec. 31, 2018	Dec. 31, 2019
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Bargain purchase gain		$ (7,414)
Anchor Bancorp
Business Acquisition [Line Items]
Fair value of FS Bancorp common stock at $46.54 (1) per share for 725,518 shares	$ 33,766
Cash paid	30,805
Total purchase price	$ 64,571
Share price	$ 46.54
Common stock outstanding	725,518
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Cash and cash equivalents	$ 54,558
Securities available-for-sale	19,555
Loans receivable, net	356,275
Premises and equipment	11,765
OREO	689
Deferred tax asset	739
Mortgage servicing rights	782
Intangible assets - CDI	5,251
Other assets	25,249
Total assets and identifiable intangible assets acquired	474,863
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Deposits	356,811	$ 321,100	$ 299,000
Borrowings	36,718
Other liabilities	9,349
Total liabilities assumed	402,878
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Total fair value of identifiable net assets	71,985
Bargain purchase gain	$ (7,414)
Number of shares received	0.291
Consideration received by anchor shareholder in cash for each share	$ 12.40

Securities Available-for-sale -

Securities Available-for-sale - Available-for-sale securities reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	$ 125,053	$ 99,089
Unrealized gains	1,347	138
Unrealized losses	(343)	(2,022)
Securities available-for-sale, at fair value	126,057	97,205
U.S. agency securities
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	8,986	16,052
Unrealized gains	95	32
Unrealized losses	(15)	(197)
Securities available-for-sale, at fair value	9,066	15,887
Corporate securities
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	10,525	7,074
Unrealized gains	52
Unrealized losses	(7)	(209)
Securities available-for-sale, at fair value	10,570	6,865
Municipal bonds
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	20,516	14,446
Unrealized gains	604	23
Unrealized losses		(275)
Securities available-for-sale, at fair value	21,120	14,194
Mortgage-backed securities
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	62,745	45,827
Unrealized gains	405	83
Unrealized losses	(300)	(1,074)
Securities available-for-sale, at fair value	62,850	44,836
U.S. Small Business Administration securities
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	22,281	15,690
Unrealized gains	191	0
Unrealized losses	(21)	(267)
Securities available-for-sale, at fair value	$ 22,451	$ 15,423

Securities Available-for-sale_2

Securities Available-for-sale - Narrative (Details)	12 Months Ended
	Dec. 31, 2019USD ($)securityitem	Dec. 31, 2018USD ($)item
Investments, Debt and Equity Securities [Abstract]
Investments with unrealized losses of less than one year | item	13	14
Investments with unrealized losses of more than one year | item	10	48
Number of securities pledged and held at FHLB	7	11
Pledged securities for FHLB	$ 7,400,000	$ 13,700,000
Public deposits	10,300,000	19,900,000
Collateral requirement	4,000,000	8,400,000
Other than temporary impairment losses, investments	$ 0	$ 0

Securities Available-for-sale_3

Securities Available-for-sale - Investments with Unrealized Losses Policy (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value
Unrealized loss position, Fair Value, Less than 12 Months	$ 21,710	$ 17,315
Unrealized loss position, Fair Value, 12 Months or Longer	11,459	65,501
Unrealized loss position, Fair Value	33,169	82,816
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months	(197)	(123)
Unrealized loss position, Unrealized losses, 12 Months or Longer	(146)	(1,899)
Unrealized losses	(343)	(2,022)
U.S. agency securities
Fair Value
Unrealized loss position, Fair Value, Less than 12 Months	2,977	6,018
Unrealized loss position, Fair Value, 12 Months or Longer		4,822
Unrealized loss position, Fair Value	2,977	10,840
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months	(15)	(25)
Unrealized loss position, Unrealized losses, 12 Months or Longer		(172)
Unrealized losses	(15)	(197)
Corporate securities
Fair Value
Unrealized loss position, Fair Value, Less than 12 Months	1,993	975
Unrealized loss position, Fair Value, 12 Months or Longer		5,890
Unrealized loss position, Fair Value	1,993	6,865
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months	(7)	(25)
Unrealized loss position, Unrealized losses, 12 Months or Longer		(184)
Unrealized losses	(7)	(209)
Municipal bonds
Fair Value
Unrealized loss position, Fair Value, Less than 12 Months		2,098
Unrealized loss position, Fair Value, 12 Months or Longer		8,787
Unrealized loss position, Fair Value		10,885
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months		(22)
Unrealized loss position, Unrealized losses, 12 Months or Longer		(253)
Unrealized losses		(275)
Mortgage-backed securities
Fair Value
Unrealized loss position, Fair Value, Less than 12 Months	12,345	6,266
Unrealized loss position, Fair Value, 12 Months or Longer	11,459	32,537
Unrealized loss position, Fair Value	23,804	38,803
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months	(154)	(40)
Unrealized loss position, Unrealized losses, 12 Months or Longer	(146)	(1,034)
Unrealized losses	(300)	(1,074)
U.S. Small Business Administration securities
Fair Value
Unrealized loss position, Fair Value, Less than 12 Months	4,395	1,958
Unrealized loss position, Fair Value, 12 Months or Longer		13,465
Unrealized loss position, Fair Value	4,395	15,423
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months	(21)	(11)
Unrealized loss position, Unrealized losses, 12 Months or Longer		(256)
Unrealized losses	$ (21)	$ (267)

Securities Available-for-sale_4

Securities Available-for-sale - Available for Sale Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Amortized Cost
Total	$ 125,053	$ 99,089
Fair Value
Total	126,057	97,205
U.S. agency securities
Amortized Cost
Due after one year through five years	996	1,043
Due after five years through ten years	3,997	10,011
Due after ten years	3,993	4,998
Subtotal	8,986	16,052
Total	8,986	16,052
Fair Value
Due after one year through five years	1,036	1,040
Due after five years through ten years	4,027	9,941
Due after ten years	4,003	4,906
Subtotal	9,066	15,887
Total	9,066	15,887
Corporate securities
Amortized Cost
Due in one year or less	5,034
Due after one year through five years	3,491	6,077
Due after five years through ten years	2,000	997
Subtotal	10,525	7,074
Total	10,525	7,074
Fair Value
Due in one year or less	5,044
Due after one year through five years	3,532	5,947
Due after five years through ten years	1,994	918
Subtotal	10,570	6,865
Total	10,570	6,865
Municipal bonds
Amortized Cost
Due after one year through five years	3,774	2,659
Due after five years through ten years	3,162	2,610
Due after ten years	13,580	9,177
Subtotal	20,516	14,446
Total	20,516	14,446
Fair Value
Due after one year through five years	3,833	2,570
Due after five years through ten years	3,307	2,592
Due after ten years	13,980	9,032
Subtotal	21,120	14,194
Total	21,120	14,194
Mortgage-backed securities
Amortized Cost
Mortgage-backed securities	62,745	45,827
Total	62,745	45,827
Fair Value
Mortgage-backed securities	62,850	44,836
Total	62,850	44,836
Federal National Mortgage Association ("FNMA")
Amortized Cost
Mortgage-backed securities	42,131	30,554
Fair Value
Mortgage-backed securities	42,333	30,026
Federal Home Loan Mortgage Corporation ("FHLMC")
Amortized Cost
Mortgage-backed securities	15,250	10,301
Fair Value
Mortgage-backed securities	15,179	9,961
Government National Mortgage Association ("GNMA")
Amortized Cost
Mortgage-backed securities	5,364	4,972
Fair Value
Mortgage-backed securities	5,338	4,849
U.S. Small Business Administration securities
Amortized Cost
Due after one year through five years	1,546
Due after five years through ten years	11,500	13,828
Due after ten years	9,235	1,862
Subtotal	22,281	15,690
Total	22,281	15,690
Fair Value
Due after one year through five years	1,555
Due after five years through ten years	11,598	13,581
Due after ten years	9,298	1,842
Subtotal	22,451	15,423
Total	$ 22,451	$ 15,423

Securities Available-for-sale_5

Securities Available-for-sale - Sales of Available for Sale Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 10,554	$ 24,312
Gross Gains	91	185
Gross Losses	$ 59	$ 14

Loans Receivable and Allowanc_3

Loans Receivable and Allowance For Loan Losses - Composition of Loan Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,351,893	$ 1,326,238
Allowance for loan losses	(13,229)	(12,349)
Deferred costs and fees, net	(3,273)	(2,907)
Premiums on purchased loans, net	955	1,537
Total loans receivable	1,336,346	1,312,519
REAL ESTATE LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	824,040	846,323
Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	210,749	204,699
Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	179,654	247,306
Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	38,167	40,258
One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	261,539	249,397
Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	133,931	104,663
CONSUMER LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	326,210	275,473
Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	210,653	167,793
Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	44,038	44,433
Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	67,179	57,822
Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,340	5,425
COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	201,643	204,442
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	140,531	138,686
Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	61,112	65,756
REAL ESTATE LOANS | REAL ESTATE LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	824,040	846,323
REAL ESTATE LOANS | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	210,749	204,699
REAL ESTATE LOANS | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	179,654	247,306
REAL ESTATE LOANS | Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	38,167	40,258
REAL ESTATE LOANS | One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	261,539	249,397
REAL ESTATE LOANS | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	133,931	104,663
CONSUMER LOANS | CONSUMER LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	326,210	275,473
CONSUMER LOANS | Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	210,653	167,793
CONSUMER LOANS | Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	44,038	44,433
CONSUMER LOANS | Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	67,179	57,822
CONSUMER LOANS | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,340	5,425
COMMERCIAL BUSINESS LOANS | COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	201,643	204,442
COMMERCIAL BUSINESS LOANS | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	140,531	138,686
COMMERCIAL BUSINESS LOANS | Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 61,112	$ 65,756

Loans Receivable and Allowanc_4

Loans Receivable and Allowance For Loan Losses - Narrative (Details)	Dec. 31, 2019divisionsegmentitem
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan portfolio segments | segment	3
Number of warehouse lending divisions | division	2
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of units in real estate property | item	5

Loans Receivable and Allowanc_5

Loans Receivable and Allowance For Loan Losses - Allowance for Loan Losses by Loan Categories (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
ALLOWANCE FOR LOAN LOSSES
Beginning balance	$ 12,349	$ 10,756
Provision (recapture) for loan losses	2,880	1,540
Charge-offs	(2,628)	(940)
Recoveries	628	993
Net recoveries (charge-offs)	(2,000)	53
Loans individually evaluated for impairment	182	975
Loans collectively evaluated for impairment	13,047	11,374
Ending balance	13,229	12,349
LOANS RECEIVABLE
Loans individually evaluated for impairment	3,128	2,947
Loans collectively evaluated for impairment	1,348,765	1,323,291
Total loans receivable	1,351,893	1,326,238
REAL ESTATE LOANS.
ALLOWANCE FOR LOAN LOSSES
Beginning balance	5,761	4,770
Provision (recapture) for loan losses	439	953
Charge-offs	(5)	(4)
Recoveries	11	42
Net recoveries (charge-offs)	6	38
Loans individually evaluated for impairment	15	125
Loans collectively evaluated for impairment	6,191	5,636
Ending balance	6,206	5,761
LOANS RECEIVABLE
Loans individually evaluated for impairment	2,635	834
Loans collectively evaluated for impairment	821,405	845,489
Total loans receivable	824,040	846,323
CONSUMER LOANS.
ALLOWANCE FOR LOAN LOSSES
Beginning balance	3,351	2,814
Provision (recapture) for loan losses	838	526
Charge-offs	(1,040)	(936)
Recoveries	617	947
Net recoveries (charge-offs)	(423)	11
Loans individually evaluated for impairment	167	150
Loans collectively evaluated for impairment	3,599	3,201
Ending balance	3,766	3,351
LOANS RECEIVABLE
Loans individually evaluated for impairment	493	428
Loans collectively evaluated for impairment	325,717	275,045
Total loans receivable	326,210	275,473
COMMERCIAL BUSINESS LOANS.
ALLOWANCE FOR LOAN LOSSES
Beginning balance	3,191	2,014
Provision (recapture) for loan losses	1,646	1,173
Charge-offs	(1,583)
Recoveries		4
Net recoveries (charge-offs)	(1,583)	4
Loans individually evaluated for impairment		700
Loans collectively evaluated for impairment	3,254	2,491
Ending balance	3,254	3,191
LOANS RECEIVABLE
Loans individually evaluated for impairment		1,685
Loans collectively evaluated for impairment	201,643	202,757
Total loans receivable	201,643	204,442
Unallocated Financing Receivables [Member]
ALLOWANCE FOR LOAN LOSSES
Beginning balance	46	1,158
Provision (recapture) for loan losses	(43)	(1,112)
Loans collectively evaluated for impairment	3	46
Ending balance	$ 3	$ 46

Loans Receivable and Allowanc_6

Loans Receivable and Allowance For Loan Losses - Aging Analysis of Past Due Loans (Details)	12 Months Ended
	Dec. 31, 2019USD ($)loan	Dec. 31, 2018USD ($)loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 4,159,000	$ 4,701,000
Current	1,347,734,000	1,321,537,000
Total loans	1,351,893,000	1,326,238,000
REAL ESTATE LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	824,040,000	846,323,000
Total real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,985,000	3,223,000
Current	821,055,000	843,100,000
Total loans	824,040,000	846,323,000
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	210,749,000	204,699,000
Total loans	210,749,000	204,699,000
Construction and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	533,000	0
Current	179,121,000	247,306,000
Total loans	179,654,000	247,306,000
Home equity.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	294,000	427,000
Current	37,873,000	39,831,000
Total loans	38,167,000	40,258,000
One-to-four-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,158,000	2,796,000
Current	259,381,000	246,601,000
Total loans	261,539,000	249,397,000
Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	133,931,000	104,663,000
Total loans	133,931,000	104,663,000
CONSUMER LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,174,000	1,047,000
Current	325,036,000	274,426,000
Total loans	326,210,000	275,473,000
Indirect home improvement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	939,000	747,000
Current	209,714,000	167,046,000
Total loans	210,653,000	167,793,000
Solar
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	127,000	146,000
Current	43,911,000	44,287,000
Total loans	44,038,000	44,433,000
Marine
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	15,000	50,000
Current	67,164,000	57,772,000
Total loans	67,179,000	57,822,000
Other consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	93,000	104,000
Current	4,247,000	5,321,000
Total loans	4,340,000	5,425,000
COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	431,000
Current	201,643,000	204,011,000
Total loans	201,643,000	204,442,000
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	431,000
Current	140,531,000	138,255,000
Total loans	140,531,000	138,686,000
Warehouse lending
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	61,112,000	65,756,000
Total loans	61,112,000	65,756,000
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,314,000	2,051,000
30-59 Days Past Due | Total real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,536,000	1,432,000
30-59 Days Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
30-59 Days Past Due | Construction and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	533,000	0
30-59 Days Past Due | Home equity.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	109,000	158,000
30-59 Days Past Due | One-to-four-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	894,000	1,274,000
30-59 Days Past Due | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
30-59 Days Past Due | CONSUMER LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	778,000	619,000
30-59 Days Past Due | Indirect home improvement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	621,000	438,000
30-59 Days Past Due | Solar
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	71,000	62,000
30-59 Days Past Due | Marine
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	15,000	50,000
30-59 Days Past Due | Other consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	71,000	69,000
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 and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
30-59 Days Past Due | Warehouse lending
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	343,000	898,000
60-89 Days Past Due | Total real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	114,000	204,000
60-89 Days Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
60-89 Days Past Due | Construction and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
60-89 Days Past Due | Home equity.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		40,000
60-89 Days Past Due | One-to-four-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	114,000	164,000
60-89 Days Past Due | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
60-89 Days Past Due | CONSUMER LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	229,000	263,000
60-89 Days Past Due | Indirect home improvement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	187,000	196,000
60-89 Days Past Due | Solar
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	40,000	43,000
60-89 Days Past Due | Marine
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
60-89 Days Past Due | Other consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,000	24,000
60-89 Days Past Due | COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	431,000
60-89 Days Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	431,000
60-89 Days Past Due | Warehouse lending
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	$ 1,502,000	1,752,000
Number of loans | loan	0
90 Days or More Past Due | Total real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 1,335,000	1,587,000
90 Days or More Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
90 Days or More Past Due | Construction and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
90 Days or More Past Due | Home equity.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	185,000	229,000
90 Days or More Past Due | One-to-four-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,150,000	1,358,000
90 Days or More Past Due | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
90 Days or More Past Due | CONSUMER LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	167,000	165,000
90 Days or More Past Due | Indirect home improvement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	131,000	113,000
90 Days or More Past Due | Solar
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	16,000	41,000
90 Days or More Past Due | Marine
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
90 Days or More Past Due | Other consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days or more past due, still accruing interest		11,000
Total Past Due	20,000	$ 11,000
Number of loans | loan		2
90 Days or More Past Due | COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	$ 0
90 Days or More Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
90 Days or More Past Due | Warehouse lending
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Non-Accrual
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	3,033,000	3,894,000
Non-Accrual | Total real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	2,540,000	1,781,000
Non-Accrual | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,086,000	0
Non-Accrual | Construction and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Non-Accrual | Home equity.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	190,000	229,000
Non-Accrual | One-to-four-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,264,000	1,552,000
Non-Accrual | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Non-Accrual | CONSUMER LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	493,000	428,000
Non-Accrual | Indirect home improvement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	451,000	367,000
Non-Accrual | Solar
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	17,000	41,000
Non-Accrual | Marine
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	18,000
Non-Accrual | Other consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	25,000	2,000
Non-Accrual | COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	1,685,000
Non-Accrual | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	1,685,000
Non-Accrual | Warehouse lending
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 0	$ 0

Loans Receivable and Allowanc_7

Loans Receivable and Allowance For Loan Losses - Financing Receivables, Related Allowance Recorded and No Related Allowance Recorder (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded	$ 2,685	$ 1,727
Unpaid Principal Balance, with related allowance recorded	537	2,516
Impaired Financing Receivable, Unpaid Principal Balance, Total	3,222	4,243
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded	2,592	1,378
Recorded Investment, with related allowance recorded	536	2,516
Recorded Investment	3,128	3,894
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with related allowance recorded	182	975
Related Allowance	182	975
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	1,980	1,554
Average Recorded Investment, with related allowance recorded	582	2,125
Impaired Financing Receivable, Average Recorded Investment	2,562	3,679
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	95	30
Interest Income Recognized, with related allowance recorded	48	124
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	143	154
Commercial
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded	1,097
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded	1,086
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	90
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	56
Home equity.
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded	278	305
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded	225	229
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with no related allowance recorded	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	206	404
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	3	8
One-to-four-family
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded	1,293	991
Unpaid Principal Balance, with related allowance recorded	61	834
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded	1,264	718
Recorded Investment, with related allowance recorded	60	834
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with related allowance recorded	15	125
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	1,500	719
Average Recorded Investment, with related allowance recorded	5	1,030
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	34	0
Interest Income Recognized, with related allowance recorded	5	28
Indirect home improvement
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with related allowance recorded	451	367
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with related allowance recorded	451	367
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with related allowance recorded	158	128
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with related allowance recorded	427	295
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with related allowance recorded	41	32
Solar
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with related allowance recorded	17	41
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with related allowance recorded	17	41
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with related allowance recorded	6	15
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with related allowance recorded	36	31
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with related allowance recorded	1	3
Marine
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with related allowance recorded		18
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with related allowance recorded		18
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with related allowance recorded		6
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with related allowance recorded	13	11
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with related allowance recorded		2
Other consumer loans
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded	17
Unpaid Principal Balance, with related allowance recorded	8
Impaired Financing Receivable, Unpaid Principal Balance, Total		2
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded	17
Recorded Investment, with related allowance recorded	8
Recorded Investment		2
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with related allowance recorded	3
Related Allowance		1
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	4
Average Recorded Investment, with related allowance recorded	5	1
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	2
Interest Income Recognized, with related allowance recorded	1
Commercial and industrial
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded		431
Unpaid Principal Balance, with related allowance recorded		1,254
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded		431
Recorded Investment, with related allowance recorded		1,254
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with related allowance recorded		700
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	180	431
Average Recorded Investment, with related allowance recorded	$ 96	757
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded		22
Interest Income Recognized, with related allowance recorded		$ 59

Loans Receivable and Allowanc_8

Loans Receivable and Allowance For Loan Losses - Loans by Credit Quality Indicator (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)loan	Dec. 31, 2018USD ($)
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,351,893	$ 1,326,238
Number of reported TDR loan modified previous 12 months and subsequently defaulted | loan	0
Number of TDR loans | loan	0
REAL ESTATE LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 824,040	846,323
Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	210,749	204,699
Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	179,654	247,306
Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	38,167	40,258
One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	261,539	249,397
Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	133,931	104,663
CONSUMER LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	326,210	275,473
Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	210,653	167,793
Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	44,038	44,433
Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	67,179	57,822
Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,340	5,425
COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	201,643	204,442
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	140,531	138,686
Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	61,112	65,756
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,317,980	1,303,884
Pass | REAL ESTATE LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	806,126	839,002
Pass | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	203,703	203,557
Pass | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	177,109	244,577
Pass | Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	37,942	39,846
Pass | One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	259,580	247,575
Pass | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	127,792	103,447
Pass | CONSUMER LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	325,717	275,037
Pass | Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	210,202	167,426
Pass | Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	44,021	44,392
Pass | Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	67,179	57,804
Pass | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,315	5,415
Pass | COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	186,137	189,845
Pass | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	125,025	124,089
Pass | Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	61,112	65,756
Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	22,028	14,107
Watch | REAL ESTATE LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,593	5,294
Watch | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,274	1,142
Watch | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,545	2,729
Watch | Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	635	207
Watch | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,139	1,216
Watch | CONSUMER LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,435	8,813
Watch | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,435	8,813
Watch | Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,223	254
Special Mention | REAL ESTATE LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,781	246
Special Mention | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,686	0
Special Mention | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Special Mention | Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	35	183
Special Mention | One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	60	63
Special Mention | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Special Mention | CONSUMER LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	8
Special Mention | Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Special Mention | Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Special Mention | Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Special Mention | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	8
Special Mention | COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,442	0
Special Mention | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,442	0
Special Mention | Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,662	7,993
Substandard | REAL ESTATE LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,540	1,781
Substandard | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,086	0
Substandard | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Substandard | Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	190	229
Substandard | One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,264	1,552
Substandard | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Substandard | CONSUMER LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	493	428
Substandard | Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	451	367
Substandard | Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	17	41
Substandard | Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	18
Substandard | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	25	2
Substandard | COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,629	5,784
Substandard | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,629	5,784
Substandard | Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | REAL ESTATE LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | CONSUMER LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | REAL ESTATE LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | One-to-four-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | CONSUMER LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | Other consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | COMMERCIAL BUSINESS LOANS.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loss | Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 0	$ 0

Loans Receivable and Allowanc_9

Loans Receivable and Allowance For Loan Losses - Risk Rated Loan Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
Loans receivable, net	$ 1,336,346	$ 1,312,519

Loans Receivable and Allowan_10

Loans Receivable and Allowance For Loan Losses - Related Party Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Loans and Leases Receivable, Related Parties [Roll Forward]
Beginning balance	$ 3,325	$ 655
Additions		2,688
Repayments	(76)	(18)
Ending balance	3,249	3,325
Aggregate loan balances of extended credit	$ 3,600	$ 3,600

Servicing Rights - Narrative (D

Servicing Rights - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractually specified servicing fees, late fees, and other ancillary fees	$ 3.5	$ 2.4
Mortgage, commercial and consumer servicing rights
Off-balance Sheet Risks, Disclosure Information [Line Items]
The unpaid principal balances of mortgage loans serviced	1,460	1,190
Mortgage servicing rights
Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair market value of servicing rights' assets	$ 13.3	$ 14.6

Servicing Rights - Servicing Ri

Servicing Rights - Servicing Rights (Details) - Mortgage servicing rights - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance	$ 10,429	$ 6,795
Additions	5,400	5,971
Servicing rights amortized	(4,177)	(2,337)
Impairment on servicing rights	(92)	0
Ending balance	$ 11,560	$ 10,429

Servicing Rights - Valuation As

Servicing Rights - Valuation Assumptions (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Off-balance Sheet Risks, Disclosure Information [Line Items]
Weighted average discount rate	9.70%	9.60%
Conditional prepayment rate ("CPR")	17.10%	9.40%
Weighted average life in years	5 years 1 month 6 days	7 years 8 months 12 days
Mortgage, commercial and consumer servicing rights
Off-balance Sheet Risks, Disclosure Information [Line Items]
Weighted average discount rate	9.70%	9.60%
Conditional prepayment rate ("CPR")	17.10%	9.40%

Servicing Rights - Changes in V

Servicing Rights - Changes in Valuation Assumptions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Off-balance Sheet Risks, Disclosure Information [Line Items]
Basis Points Drop in Note Rate, Assumption One	50.00%	50.00%
Basis Points Drop in Note Rate, Assumption Two	100.00%	100.00%
Conditional prepayment rate	17.10%	9.40%
Discount rate	9.70%	9.60%
Mortgage, commercial and consumer servicing rights
Off-balance Sheet Risks, Disclosure Information [Line Items]
Aggregate portfolio principal balance	$ 1,463,732	$ 1,186,858
Weighted average rate of note	4.20%	4.30%
Conditional prepayment rate	17.10%	9.40%
Conditional prepayment rate, 0.5% Adverse Change	24.60%	11.60%
Conditional prepayment rate, 1.0% Adverse Change	32.50%	17.70%
Fair value MSR	$ 13,255	$ 14,218
Fair value MSR, 0.5% Adverse Change	10,582	12,723
Fair value of MSR, 1.0% Adverse Change	$ 8,674	$ 10,358
Percentage of MSR	0.90%	1.20%
Percentage of MSR, 0.5% Adverse Change	0.70%	1.10%
Percentage of MSR, 1.0% Adverse Change	0.60%	0.90%
Discount rate	9.70%	9.60%
Discount rate, 0.5% Adverse Change	10.20%	10.10%
Discount rate, 1.0% Adverse Change	10.70%	10.60%
Fair value MSR, 0.5% Adverse Change	$ 13,037	$ 13,912
Fair value MSR, 1.0% Adverse Change	$ 12,826	$ 13,617
Percentage of MSR, 0.5% Adverse Change	0.90%	1.20%
Percentage of MSR, 1.0% Adverse Change	0.90%	1.20%

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 45,385	$ 43,031
Less accumulated depreciation and amortization	(16,615)	(13,921)
Property, Plant and Equipment, Net, Total	28,770	29,110
Depreciation and amortization	2,800	1,800
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	5,227	5,227
Buildings
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	16,769	16,772
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	13,562	12,039
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	2,848	2,422
Building improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	6,572	5,897
Projects in process
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 407	$ 674

Leases (Details)

Leases (Details) - USD ($) $ in Millions	Jan. 01, 2019	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
ROU assets obtained in exchange for operating lease obligations	$ 5.1	$ 1
Options to extend	true
Renewal term	5 years
Rent expense			$ 1.2
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease terms	4 months
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease terms	8 years

Leases - Components of lease co

Leases - Components of lease cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Lease cost:
Operating lease cost	$ 1,285
Short-term lease cost	166
Total lease cost	1,451
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases	$ 1,331
Weighted average remaining lease term- operating leases	5 years 3 months 18 days
Weighted average discount rate- operating leases	3.00%

Leases - Maturities of operatin

Leases - Maturities of operating lease liabilities (Details) $ in Thousands	Dec. 31, 2019USD ($)
Maturities of operating lease liabilities
2020	$ 1,298
2021	1,169
2022	1,065
2023	674
2024	614
Thereafter	884
Total lease payments	5,704
Less imputed interest	(490)
Operating lease liabilities	$ 5,214

Other Real Estate Owned - Activ

Other Real Estate Owned - Activity related to OREO (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Other Real Estate [Roll Forward]
Beginning balance	$ 689	$ 0
Additions	242	689
Gross proceeds from sale of OREO	(901)	0
Gain on sale of OREO	138	0
Ending balance	$ 168	$ 689

Other Real Estate Owned - Narra

Other Real Estate Owned - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
OREO Properties acquired	$ 168,000	$ 689,000
Net loans transferred to OREO	242,000	689,000
Holding costs	13,000	2,000
Mortgage loans in process of foreclosure	$ 1,000,000	$ 261,000

Deposits - Deposit Liabilities

Deposits - Deposit Liabilities (Details)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Nov. 15, 2018USD ($)	Jan. 22, 2016Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Noninterest-bearing checking	$ 260,131,000	$ 221,107,000
Interest-bearing checking	177,972,000	151,103,000
Savings	118,845,000	122,344,000
Money market	270,489,000	282,595,000
Certificates of deposit less than $100,000	277,988,000	243,193,000
Certificates of deposit of $100,000 through $250,000	181,402,000	154,095,000
Certificates of deposit of $250,000 and over	92,110,000	86,357,000
Escrow accounts related to mortgages serviced	13,471,000	13,425,000
Total deposits	1,392,408,000	1,274,219,000
Federal Reserve Bank required deposit reserves	0	17,400,000
Money Market Funds
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-bearing Domestic Deposit, Brokered	6,200,000	1,000
Certificates of Deposit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-bearing Domestic Deposit, Brokered	141,400,000	116,700,000
Bank of America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Remaining Branch Purchase Deposits	117,100,000	120,000,000
Number of Bank Branches | Office				4
Anchor Bancorp
Accounts, Notes, Loans and Financing Receivable [Line Items]
Remaining Branch Purchase Deposits	$ 299,000,000	$ 321,100,000	$ 356,811,000

Deposits - Maturities of Time D

Deposits - Maturities of Time Deposits for Future Periods (Details) $ in Thousands	Dec. 31, 2019USD ($)
Banking and Thrift [Abstract]
Maturing in 2020	$ 357,786
Maturing in 2021	103,560
Maturing in 2022	57,972
Maturing in 2023	15,120
Maturing in 2024	17,062
Thereafter	0
Total	$ 551,500

Deposits - Interest Expense by

Deposits - Interest Expense by Deposit Category (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Interest-bearing checking	$ 1,414	$ 227
Savings and money market	3,098	2,054
Certificates of deposit	11,650	5,040
Total	$ 16,162	$ 7,321

Deposits - Related Party Policy

Deposits - Related Party Policy (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Related-party deposits	$ 3.3	$ 6.2

Debt - Narrative (Details)

Debt - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2019	Dec. 31, 2018	Oct. 15, 2015
Debt Instrument [Line Items]
Federal home loan bank, advances, general debt obligations, maximum amount available, percentage of total assets (as a percent)		45.00%
Federal home loan bank, advances, general debt obligations, collateral pledged		$ 646,100,000
Federal home loan bank, borrowing capacity		477,200,000
Federal home loan bank, unused borrowing capacity		386,500,000
Unsecured Fed Funds lines of credit		71,000,000
Unsecured Fed Funds, lines of credit, outstanding balance		0
Principal amount of subordinated debt				$ 10,000,000
Subordinated note				$ 10,000,000
Subordinated Note
Debt Instrument [Line Items]
Annual interest rate (as a percent)				6.50%
Contributions of proceeds from subordinated debt	$ 9,000,000
Federal Reserve Bank
Debt Instrument [Line Items]
Warehouse lines of credit		156,100,000	$ 127,700,000
Line of credit, outstanding balance		0	0
Federal Reserve Bank
Debt Instrument [Line Items]
Loans pledged as collateral		$ 318,800,000	$ 265,200,000

Debt - Advances on Borrowing Li

Debt - Advances on Borrowing Line (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal home loan bank, advances, general debt obligations	$ 84,864	$ 137,149
Securities Line
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal home loan bank, advances, general debt obligations	$ 84,864	$ 137,149
Securities Line | Minimum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal Home Loan Bank, interest rates	1.58%	1.15%
Securities Line | Maximum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal Home Loan Bank, interest rates	2.87%	2.87%

Debt - Maximum and Average Outs

Debt - Maximum and Average Outstanding, Weighted Average Interest Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Maximum balance:
Federal Home Loan Bank advances and Fed Funds	$ 186,401	$ 180,025
Federal Reserve Bank	5,000	0
Fed Funds lines of credit	5,000	21,016
Average balance:
Federal Home Loan Bank advances and Fed Funds	93,653	96,044
Fed Funds lines of credit	$ 318	$ 5,286
Weighted average interest rate:
Federal Home Loan Bank advances and Fed Funds (as a percent)	2.61%	2.02%
Federal Reserve Bank (as a percent)	2.96%	0.00%
Fed Funds lines of credit (as a percent)	2.09%	1.93%
Federal Reserve Bank, Advances, Activity for Year, Average Balance Outstanding	$ 167	$ 0
Subordinated note
Average balance:
Subordinated note	$ 10,000	$ 10,000
Weighted average interest rate:
Subordinated note (as a percent)	6.50%	6.50%
Subordinated note | Maximum
Maximum balance:
Subordinated note	$ 10,000	$ 10,000

Debt - Schedule of Federal Home

Debt - Schedule of Federal Home Loan Bank Advances Maturities Summary Due (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Federal Home Loan Bank, Advances, Fiscal Year Maturity [Abstract]
2020	$ 12,336
2021	45,000
2022	0
2023	13,633
2024	13,895
Total	$ 84,864	$ 137,149
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate of Amounts Due [Abstract]
2020, Interest Rates (percent)	2.46%
2021, Interest Rates (percent)	2.48%
2022, Interest Rates (percent)	0.00%
2023, Interest Rates (percent)	2.03%
2024, Interest Rates (percent)	1.77%

Employee Benefits - Narrative (

Employee Benefits - Narrative (Details) - USD ($)	Jul. 09, 2012	Jan. 02, 2012	Dec. 31, 2019	Dec. 31, 2018
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
Number of hours per service period year (in hours)		1000 hours
Employee stock ownership plan (ESOP), debt structure, employer loan, amount	$ 2,600,000
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			$ 275,000
Employee stock ownership plan (ESOP), interest payments from esop			20,000
ESOP compensation expense for allocated shares			$ 1,506,000	$ 1,209,000

Employee Benefits - Schedule of

Employee Benefits - Schedule of Shares Under ESOP (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Jul. 09, 2012
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]
Allocated shares	189,511	176,809
Committed to be released shares	0	0
Unallocated shares	51,842	77,763
Total ESOP shares	241,353	254,572	259,210
Fair value of unallocated shares (in thousands)	$ 3,006	$ 3,627

Employee Benefits - 401(K) Plan

Employee Benefits - 401(K) Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Schedule of Defined Contribution Plans Disclosures [Line Items]
Defined contribution plan, minimum age requirement	18 years
Percentage vested in deferral contributions account	100.00%
Employer contributions	$ 1,200	$ 917
Contributions between 1% to 3%
Schedule of Defined Contribution Plans Disclosures [Line Items]
Employer matching percentage	100.00%
Contributions between 1% to 3% | Minimum
Schedule of Defined Contribution Plans Disclosures [Line Items]
Defined contribution plan, employee contribution (percent)	1.00%
Contributions between 1% to 3% | Maximum
Schedule of Defined Contribution Plans Disclosures [Line Items]
Defined contribution plan, employee contribution (percent)	3.00%
Contributions between 4% and 5%
Schedule of Defined Contribution Plans Disclosures [Line Items]
Employer matching percentage	50.00%
Contributions between 4% and 5% | Minimum
Schedule of Defined Contribution Plans Disclosures [Line Items]
Defined contribution plan, employee contribution (percent)	4.00%
Contributions between 4% and 5% | Maximum
Schedule of Defined Contribution Plans Disclosures [Line Items]
Defined contribution plan, employee contribution (percent)	5.00%

Income Taxes - Components of In

Income Taxes - Components of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Provision for income taxes
Current	$ 4,425	$ 3,455
Deferred	988	768
Income Tax Expense (Benefit), Total	$ 5,413	$ 4,223

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Income tax provision at statutory rate	$ 5,907	$ 6,000
Tax exempt income	(225)	(129)
Nondeductible items resulting in increase in tax	129	279
Decrease in tax resulting from other items	(78)	(87)
Equity compensation	(691)	(571)
Executive compensation	112	135
Bargain purchase gain	0	(1,594)
ESOP	259	190
Income Tax Expense (Benefit), Total	$ 5,413	$ 4,223
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Income tax provision at statutory rate	21.00%	21.00%
Tax exempt income	(0.80%)	(0.50%)
Nondeductible items resulting in increase in tax	0.50%	1.00%
Increase in tax resulting from other items	(0.30%)	(0.30%)
Equity compensation	(2.50%)	(2.00%)
Executive compensation	0.40%	0.50%
Bargain purchase gain	0.00%	(5.60%)
ESOP	0.90%	0.70%
Total	19.20%	14.80%

Income Taxes - Deferred Assets

Income Taxes - Deferred Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets
Net operating loss carryforward	$ 864	$ 1,201
Allowance for loan losses	2,844	2,301
Purchase accounting adjustments	466	776
Other real estate owned	126	127
Non-accrued loan interest	13	115
Restricted stock awards	68	54
Non-qualified stock options	185	71
Securities available-for-sale	0	405
Lease liability	1,121	0
Other	351	473
Total deferred tax assets	6,038	5,523
Deferred Tax Liabilities
Loan origination costs	(1,341)	(626)
Servicing rights	(2,525)	(2,241)
Prepaids	0	(166)
Stock dividend - FHLB stock	(59)	(73)
Property, plant, and equipment	(1,362)	(1,489)
Purchase accounting adjustments	(1,404)	(1,289)
Securities available-for-sale	(216)	0
Lease right-of-use assets	(1,078)	0
Other	(24)	0
Total deferred tax liabilities	(8,009)	(5,884)
Net deferred tax liabilities	$ (1,971)	$ (361)

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
INCOME TAXES
Net operating loss carryforwards	$ 4,000
Uncertain tax liabilities	0	$ 0
Recognized interest and penalties	$ 0	$ 0

Commitments and Contingencies -

Commitments and Contingencies - Commitment (Details) - Commitments to Extend Credit - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	$ 312,272	$ 295,841
REAL ESTATE LOANS.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	183,477	160,158
Commercial
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	247	5,836
Construction and development
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	95,031	76,889
One-to-four-family
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	39,697	35,714
Home equity.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	47,880	41,204
Commercial/Multi-family
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	622	515
CONSUMER LOANS.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	22,176	18,560
COMMERCIAL BUSINESS LOANS.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	106,619	117,123
Commercial and industrial
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	72,731	72,880
Warehouse lending
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	$ 33,888	$ 44,243

Commitments and Contingencies_2

Commitments and Contingencies - Narrative (Details)	1 Months Ended	12 Months Ended
	Mar. 31, 2008shares	Dec. 31, 2019USD ($)$ / shares	Dec. 31, 2018USD ($)$ / shares
Loss Contingencies [Line Items]
Amount of loans sold to FHLB		$ 66,400,000
Federal Home Loan Bank, First Loss Account Established		938,000
Bank recourse obligation		$ 811,000
Bank recourse obligation, percentage of loans outstanding		1.20%
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	$ 0
Severance agreement, period of base compensation disbursed as lump sum payment (in months)		24 months
Change of control agreement, notice required to cancel agreement (in months)		24 months
Change of control agreement, executive payment, period following change in control (in months)		12 months
Common stock, conversion ratio	1.6298	1.6228
Carrying value of stock		$ 0
Pending material legal actions		0
Visa, Inc.
Loss Contingencies [Line Items]
Market value of stock (in dollars per share) | $ / shares		$ 187.90	$ 131.94
Visa, Inc. | Bank | Class B Common Stock
Loss Contingencies [Line Items]
Number of shares received in an IPO | shares	7,158
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
Commitments to Extend Credit
Loss Contingencies [Line Items]
Reserve for estimated losses		$ 293,000	$ 299,000
Guarantee on loans sold
Loss Contingencies [Line Items]
Reserve for estimated losses		$ 1,200,000	$ 1,000,000

Significant Concentration Of _2

Significant Concentration Of Credit Risk (Details)	12 Months Ended
	Dec. 31, 2019
Credit Concentration Risk [Member] | Construction Land Development And Other Land Concentration [Member] | Regulatory Capital [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	85.70%

Regulatory Capital - Compliance

Regulatory Capital - Compliance with Regulatory Capital Requirements under Banking Regulations (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 to Risk Weighted Assets, Capital Conservation Buffer, Phased in	2.50%
Common Equity Tier 1 to Risk Weighted Assets, Capital Conservation Buffer	2.50%
Total risk-based capital, Ratio	14.30%	13.30%
Tier 1 risk-based capital, Ratio	13.40%	12.40%
Tier 1 leverage capital, Ratio	11.30%	12.10%
CET 1 capital, Ratio	13.40%	12.40%
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total risk-based capital, Amount	$ 209,535	$ 188,472
Total risk-based capital, Ratio	14.64%	13.52%
Total risk-based capital, For Capital Adequacy Purposes, Amount	$ 114,502	$ 111,493
Total risk-based capital, For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Total risk-based capital, For Capital Adequacy with Capital Buffer, Amount	$ 150,283	$ 137,694
Total risk-based capital, For Capital Adequacy with Capital Buffer, Ratio	10.50%	9.88%
Total risk-based capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 143,127	$ 139,366
Total risk-based capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 risk-based capital, Amount	$ 196,013	$ 175,824
Tier 1 risk-based capital, Ratio	13.70%	12.62%
Tier 1 risk-based capital, For Capital Adequacy Purposes, Amount	$ 85,876	$ 83,620
Tier 1 risk-based capital, For Capital Adequacy Purposes, Ratio	6.00%	6.00%
Tier 1 risk-based capital, For Capital Adequacy with Capital Buffer, Amount	$ 121,658	$ 109,820
Tier 1 risk-based capital, For Capital Adequacy with Capital Buffer, Ratio	8.50%	7.88%
Tier 1 risk-based capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 114,502	$ 111,493
Tier 1 risk-based capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%	8.00%
Tier 1 leverage capital	$ 196,013	$ 175,824
Tier 1 leverage capital, Ratio	11.56%	10.67%
Tier 1 leverage capital, For Capital Adequacy Purposes, Amount	$ 67,808	$ 65,884
Tier 1 leverage capital, For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier 1 leverage capital, For Capital Adequacy with Capital Buffer, Amount	$ 0	$ 0
Tier 1 leverage capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 84,761	$ 82,355
Tier 1 leverage capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%
CET 1 capital, Amount	$ 196,013	$ 175,824
CET 1 capital, Ratio	13.70%	12.62%
CET 1 capital, For Capital Adequacy Purposes, Amount	$ 64,407	$ 62,715
CET 1 capital, For Capital Adequacy Purposes, Ratio	4.50%	4.50%
CET 1 capital, For Capital Adequacy with Capital Buffer, Amount	$ 100,189	$ 88,846
CET 1 capital, For Capital Adequacy with Capital Buffer, Ratio	7.00%	6.38%
CET 1 capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 93,033	$ 90,588
CET 1 capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%	6.50%

Fair Value Measurements - Avail

Fair Value Measurements - Available for Sale Securities Measured at Fair Value on a Recurring Basis (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets from Level 1 to Level 2		$ 0
Fair value of assets from Level 2 to Level 1		0
Financial assets transferred into Level 3		0
Financial assets transferred out of Level 3		0
Fair value of liabilities from Level 1 to Level 2		0
Fair value of liabilities from Level 2 to Level 1		0
Financial liabilities transferred into Level 3		0
Financial liabilities transferred out of Level 3		0
Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets transferred into Level 3	$ 1,000,000
Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial assets transferred into Level 3	138,000
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	196,313,000	148,903,000
Fair Value, Measurements, Recurring | 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	9,066,000	15,887,000
Fair Value, Measurements, Recurring | 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	10,570,000	6,865,000
Fair Value, Measurements, Recurring | 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	21,120,000	14,194,000
Fair Value, Measurements, Recurring | 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	62,850,000	44,836,000
Fair Value, Measurements, Recurring | 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	22,451,000	15,423,000
Fair Value, Measurements, Recurring | 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	69,699,000	51,195,000
Fair Value, Measurements, Recurring | Derivative
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	(203,000)	(574,000)
Fair Value, Measurements, Recurring | 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	557,000	503,000
Fair Value, Measurements, Recurring | Derivative | Individual forward sale commitments with investors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	(203,000)	(574,000)
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	194,594,000	148,400,000
Fair Value, Measurements, Recurring | 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	9,066,000	15,887,000
Fair Value, Measurements, Recurring | 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	9,546,000	6,865,000
Fair Value, Measurements, Recurring | 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	20,982,000	14,194,000
Fair Value, Measurements, Recurring | 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	62,850,000	44,836,000
Fair Value, Measurements, Recurring | 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	22,451,000	15,423,000
Fair Value, Measurements, Recurring | 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	69,699,000	51,195,000
Fair Value, Measurements, Recurring | Level 2 | Derivative
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	(8,000)	(540,000)
Fair Value, Measurements, Recurring | Level 2 | Derivative | Individual forward sale commitments with investors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	(8,000)	(540,000)
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,719,000	503,000
Fair Value, Measurements, Recurring | 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	1,024,000
Fair Value, Measurements, Recurring | 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	138,000
Fair Value, Measurements, Recurring | Level 3 | Derivative
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	(195,000)	(34,000)
Fair Value, Measurements, Recurring | 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	557,000	503,000
Fair Value, Measurements, Recurring | Level 3 | Derivative | Individual forward sale commitments with investors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	$ (195,000)	$ (34,000)

Fair Value Measurements - Impai

Fair Value Measurements - Impaired Loans and OREO (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO	$ 168	$ 689
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans	3,128	3,894
OREO	168	689
Servicing Rights	13,255	14,593
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	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	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	3,128	3,894
OREO	168	689
Servicing Rights	$ 13,255	$ 14,593

Fair Value Measurements - Disco

Fair Value Measurements - Discount Rate (Details)	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2019item	Dec. 31, 2018item
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 sale 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:FairValueOfUnderlyingCollateralMember
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:FairValueOfUnderlyingCollateralMember
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
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
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)			0.945	0.952
Level 3 | Fair Value, Measurements, Recurring | Individual forward sale commitments with investors | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)			0.80
Level 3 | Fair Value, Measurements, Recurring | Individual forward sale commitments with investors | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)			0.99
Level 3 | Fair Value, Measurements, Recurring | Individual forward sale commitments with investors | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)			0.945	0.952
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)		0.021	0.021
Level 3 | Fair Value, Measurements, Recurring | Municipal bonds | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)		0.030
Level 3 | Fair Value, Measurements, Recurring | Municipal bonds | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)		0.037
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)		0.034
Level 3 | Fair Value, Measurements, Nonrecurring | Impaired Loans | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)			0
Level 3 | Fair Value, Measurements, Nonrecurring | Impaired Loans | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)			0.50
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 | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)			0
Level 3 | Fair Value, Measurements, Nonrecurring | Other Real Estate Owned | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)			0.75
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		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
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
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)			0.171	0.094

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value Level 3 on recurring basis (Details) - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Interest rate lock commitments with customers
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 503	$ 726
Purchases and Issuances	11,063	9,722
Sales and Settlements	(11,009)	(9,945)
Ending Balance	557	503
Net change in fair value for gains/(losses) relating to items held at end of period	54	(223)
Individual forward sale commitments with investors
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	(34)	51
Purchases and Issuances	(1,444)	850
Sales and Settlements	1,283	(935)
Ending Balance	(195)	(34)
Net change in fair value for gains/(losses) relating to items held at end of period	(161)	$ (85)
Securities available-for-sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Transfers In	1,162
Ending Balance	$ 1,162

Fair Value Measurements - Fai_2

Fair Value Measurements - Fair Value By Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financial Assets
Certificates of deposit at other financial institutions	$ 20,902	$ 22,074
Securities available-for-sale, at fair value	126,057	97,205
Carrying Amount | Level 1
Financial Assets
Cash and cash equivalents	45,778	32,779
Certificates of deposit at other financial institutions	20,902	22,074
Carrying Amount | Level 2
Financial Assets
Securities available-for-sale, at fair value	124,895	97,205
Loans held for sale, at fair value	69,699	51,195
FHLB stock, at cost	8,045	9,887
Accrued interest receivable	5,908	5,761
Financial Liabilities
Deposits	1,392,408	1,274,219
Borrowings	84,864	137,149
Subordinated note, net	9,885	9,865
Accrued interest payable	273	344
Paired off commitments with investors, liability	71	64
Individual forward sale commitments with investors, financial liability	8	540
Carrying Amount | Level 3
Financial Assets
Securities available-for-sale, at fair value	1,162	0
Loans receivable, gross	1,351,893	1,326,238
Servicing rights, held at lower of cost or fair value	11,560	10,429
Fair value interest rate locks with customers	557	503
Financial Liabilities
Individual forward sale commitments with investors, financial liability	195	34
Fair Value | Level 1
Financial Assets
Cash and cash equivalents	45,778	32,779
Certificates of deposit at other financial institutions	20,902	22,074
Fair Value | Level 2
Financial Assets
Securities available-for-sale, at fair value	124,895	97,205
Loans held for sale, at fair value	69,699	51,195
FHLB stock, at cost	8,045	9,887
Accrued interest receivable	5,908	5,761
Financial Liabilities
Deposits	1,385,658	1,261,096
Borrowings	85,268	136,873
Subordinated note, net	10,599	10,242
Accrued interest payable	273	344
Paired off commitments with investors, liability	71	64
Individual forward sale commitments with investors, financial liability	8	540
Fair Value | Level 3
Financial Assets
Securities available-for-sale, at fair value	1,162	0
Loans receivable, gross	1,377,408	1,320,341
Servicing rights, held at lower of cost or fair value	13,255	14,593
Fair value interest rate locks with customers	557	503
Financial Liabilities
Individual forward sale commitments with investors, financial liability	$ 195	$ 34

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Numerator (in thousands):
Net Income	$ 22,717	$ 24,347
Dividends and undistributed earnings allocated to participating securities	(73)
Net income available to common shareholders	$ 22,644	$ 24,347
Denominator (shown as actual):
Basic weighted average common shares outstanding	4,414,032	3,698,623
Dilutive shares (in shares)	108,992	171,166
Diluted weighted average common shares outstanding	4,523,024	3,869,789
Basic earnings per share (in dollars per share)	$ 5.13	$ 6.58
Diluted earnings per share (in dollars per share)	$ 5.01	$ 6.29
Potentially dilutive securities excluded from EPS	36,337	11,326

Derivatives (Details)

Derivatives (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Margin Cash Collateral	$ 1,200,000	$ 460,000
Derivatives, fair value changes, gain on sale of loans	303,000	(702,000)
Not Designated as Hedging Instrument | Interest rate lock commitments with customers
Derivative [Line Items]
Notional	33,914,000	29,432,000
Fair Value, Asset	557,000	503,000
Not Designated as Hedging Instrument | Mandatory and best effort forward commitments with investors
Derivative [Line Items]
Notional	43,752,000	24,776,000
Fair Value, Liability	195,000	34,000
Not Designated as Hedging Instrument | Forward TBA mortgage-backed securities
Derivative [Line Items]
Notional	46,000,000	51,500,000
Fair Value, Liability	$ 8,000	$ 540,000

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($)	Aug. 15, 2019	Aug. 15, 2018	Jan. 01, 2016	May 08, 2014	Sep. 30, 2013	Dec. 31, 2019	Dec. 31, 2018	May 17, 2018
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term in years						6 years 6 months	6 years 6 months
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, nonvested awards						$ 2,000,000
Total fair value of shares vested						1,200,000	$ 1,100,000
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense						869,000	767,000
Income tax benefit from share-based compensation expense						$ 182,000	$ 161,000
Award contractual life						10 years
Granted (in shares)						50,655
Shares available for grant						6,013
Expected forfeiture rate over contractual term						3.10%
Remaining weighted-average vesting period						6 years 9 months 7 days	6 years 9 months 29 days
Total intrinsic value of options exercised						$ 1,799,754
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
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
Market value of stock (in dollars per share)			$ 26	$ 16.89
Shares			4,500	125,105
2013 Equity Incentive Plan | Restricted stock awards | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						3 years
2013 Equity Incentive Plan | Restricted stock awards | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						5 years
2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant						336,345
2018 Equity Incentive Plan | Equity option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	50,655	100,000
2018 Equity Incentive Plan | Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	20,215	25,000
2018 Equity Incentive Plan | Restricted stock awards | Directors Excluding CEO
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)	$ 48.74	$ 58.60
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
Unrecognized compensation cost, nonvested awards						$ 1,400,000
Remaining weighted-average vesting period						3 years 10 months 24 days
Maximum | 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
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 | Officers And Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						5 years

Stock-Based Compensation - Fair

Stock-Based Compensation - Fair Value of Options (Details) - Stock Options - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	1.23%	0.95%
Expected volatility	18.90%	18.80%
Risk-free interest rate	1.45%	2.77%
Expected term in years	6 years 6 months	6 years 6 months
Weighted-average grant date fair value per option granted	$ 8.80	$ 13.22

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Details) - 2013 Equity Incentive Plan - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Shares
Outstanding, beginning balance (in shares)	290,104
Granted, Shares	50,655
Less exercised (in shares)	52,769
Outstanding, ending balance (in shares)	287,990	290,104
Expected to vest, assuming a 0.31% annual forfeiture rate (in shares)	287,067
Exercisable (in shares)	157,335
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expected Forfeiture Rate	0.31%
Expected forfeiture rate over contractual term	3.10%
Award contractual life	10 years
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 31.27
Granted (in dollars per share)	48.74
Less exercised (in dollars per share)	16.89
Outstanding, ending balance (in dollars per share)	36.98	$ 31.27
Expected to vest, assuming a 0.31% annual forfeiture rate (in dollars per share)	36.92
Exercisable (in dollars per share)	$ 22.19
Weighted-Average Remaining Contractual Term In Years
Outstanding, ending balance	6 years 9 months 7 days	6 years 9 months 29 days
Expected to vest, assuming a 0.31% annual forfeiture rate, Weighted Average Remaining Contractual Term	6 years 9 months 4 days
Exercisable	4 years 10 months 24 days
Aggregate Intrinsic Value
Beginning balance	$ 4,940,803
Less exercised	1,799,754
Ending balance	7,722,369	$ 4,940,803
Expected to vest, assuming a 0.31% annual forfeiture rate	7,713,673
Exercisable	$ 6,544,812

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Awards (Details) - Restricted stock awards	12 Months Ended
	Dec. 31, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	4 years
Shares
Nonvested, Beginning balance (in shares) | shares	43,421
Granted (shares) | shares	20,215
Less vested (in shares) | shares	23,421
Nonvested, Ending balance (in shares) | shares	40,215
Weighted-Average Grant-Date Fair Value Per Share
Nonvested, Beginning balance (in dollars per share) | $ / shares	$ 41.22
Granted (in dollars per share) | $ / shares	48.74
Less vested (in dollars per share) | $ / shares	26.38
Nonvested, Ending balance (in dollars per share) | $ / shares	$ 53.64
2013 Equity Incentive Plan | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
2013 Equity Incentive Plan | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years
2018 Equity Incentive Plan | Directors Excluding CEO
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

Business Segments - Narrative (

Business Segments - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)segmentitem	Dec. 31, 2018USD ($)	Jan. 22, 2016item
Segment Reporting Information [Line Items]
Number of operating segments | segment	2
Commercial and Consumer Banking	fsbw:CommercialAndConsumerBankingMember
Total deposits | $	$ 1,392,408	$ 1,274,219
Retail Deposit | Pacific Northwest
Segment Reporting Information [Line Items]
Number of bank branches | item	21
Commercial and Consumer Banking | Pacific Northwest
Segment Reporting Information [Line Items]
Total deposits | $	$ 1,390,000	$ 1,270,000
Bank of America
Segment Reporting Information [Line Items]
Number of bank branches | item			4

Business Segments - Segment Fin

Business Segments - Segment Financial Results (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)item	Dec. 31, 2018USD ($)item
Segment Reporting Information [Line Items]
Net interest income	$ 70,308	$ 52,098
Provision for loan losses	(2,880)	(1,540)
Total assets	1,713,056	1,621,644
Noninterest income	23,035	26,850
Noninterest expense	(62,333)	(48,838)
INCOME BEFORE PROVISION FOR INCOME TAXES	28,130	28,570
Provision for income taxes	(5,413)	(4,223)
NET INCOME	22,717	24,347
Total average assets for period ended	$ 1,650,369	$ 1,174,713
FTEs | item	452	424
Home Lending
Segment Reporting Information [Line Items]
Net interest income	$ 6,307	$ 3,324
Provision for loan losses	(433)	(224)
Total assets	312,404	246,280
Noninterest income	13,209	14,025
Noninterest expense	(14,283)	(15,894)
INCOME BEFORE PROVISION FOR INCOME TAXES	4,800	1,231
Provision for income taxes	(924)	(182)
NET INCOME	3,876	1,049
Total average assets for period ended	$ 272,901	$ 229,661
FTEs | item	127	115
Commercial and Consumer Banking
Segment Reporting Information [Line Items]
Net interest income	$ 64,001	$ 48,774
Provision for loan losses	(2,447)	(1,316)
Total assets	1,400,652	1,375,364
Noninterest income	9,826	12,825
Noninterest expense	(48,050)	(32,944)
INCOME BEFORE PROVISION FOR INCOME TAXES	23,330	27,339
Provision for income taxes	(4,489)	(4,041)
NET INCOME	18,841	23,298
Total average assets for period ended	$ 1,377,468	$ 945,052
FTEs | item	325	309
Anchor Bancorp
Segment Reporting Information [Line Items]
Provision for loan losses - allocated	$ 198,500

Revenue From Contracts With C_3

Revenue From Contracts With Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Noninterest Income
Noninterest Income (in-scope of Topic 606)	$ 2,913	$ 1,745
Noninterest Income (out-of-scope of Topic 606)	20,122	25,105
Total noninterest income	23,035	26,850
Debit Card Interchange Fees
Noninterest Income
Noninterest Income (in-scope of Topic 606)	1,848	1,184
Fees from non-sufficient funds
Noninterest Income
Noninterest Income (in-scope of Topic 606)	$ 1,065	$ 561

Goodwill And Other Intangible_3

Goodwill And Other Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Goodwill			$ 2,312,000	$ 2,312,000
Goodwill, Impairment Loss	$ 0	$ 0
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Gross, Total	7,490,000	2,239,000
Finite-Lived Intangible Assets, Accumulated Amortization	(1,273,000)	(922,000)
Finite-Lived Intangible Assets, Net, Beginning Balance	6,217,000	1,317,000
Amortization	(760,000)	(351,000)
Finite-Lived Intangible Assets, Gross, Total	7,490,000	7,490,000
Finite-Lived Intangible Assets, Accumulated Amortization	2,033,000	1,273,000
Finite-Lived Intangible Assets, Net, Ending Balance	5,457,000	6,217,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020			706,000
2021			691,000
2022			691,000
2023			691,000
2024			621,000
Thereafter			2,057,000
Total	$ 5,457,000	6,217,000	$ 5,457,000	6,217,000
Anchor Bancorp
Finite-Lived Intangible Assets, Net [Abstract]
Amortization		(44,000)
Additions as a result of the Anchor Acquisition Gross		5,251,000
Additions as a result of the Anchor Acquisition Net				$ 5,207,000
Amortization period	10 years
Bank of America
Finite-Lived Intangible Assets, Net [Abstract]
Amortization	$ (760,000)	$ (307,000)
Amortization period	9 years

Parent Company Only Financial_3

Parent Company Only Financial Information - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 13,175	$ 9,408
Other assets	11,682	6,982
TOTAL ASSETS	1,713,056	1,621,644
Liabilities and Stockholders' Equity
Subordinated note, net	9,885	9,865
Other liabilities	18,472	20,012
Total liabilities	1,512,814	1,441,606
Total stockholders' equity	200,242	180,038	$ 122,002
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,713,056	1,621,644
FS Bancorp, Inc.
Assets
Cash and due from banks	5,568	7,026
Investment in subsidiary	204,570	182,874
Other assets	172	175
TOTAL ASSETS	210,310	190,075
Liabilities and Stockholders' Equity
Subordinated note, net	9,885	9,865
Other liabilities	183	172
Total liabilities	10,068	10,037
Total stockholders' equity	200,242	180,038
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 210,310	$ 190,075

Parent Company Only Financial_4

Parent Company Only Financial Information - Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Condensed Income Statements, Captions [Line Items]
Interest from subsidiary	$ 84,706	$ 58,616
Interest expense on subordinated note	(679)	(679)
Dividends received from subsidiary	4,919	3,710
Income tax benefit	5,413	4,223
NET INCOME	22,717	24,347
FS Bancorp, Inc.
Condensed Income Statements, Captions [Line Items]
Interest from subsidiary	2	2
Interest expense on subordinated note	(679)	(679)
Dividends received from subsidiary	3,935	1,436
Other expenses	(142)	(157)
Income before income tax benefit and equity in undistributed net income of subsidiary	3,116	602
Income tax benefit	172	175
Equity in undistributed earnings of subsidiary	19,429	23,570
NET INCOME	$ 22,717	$ 24,347

Parent Company Only Financial_5

Parent Company Only Financial Information - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 22,717	$ 24,347
ESOP compensation expense for allocated shares	1,506	1,209
Share-based compensation expense related to stock options and restricted stock	869	767
Other assets	(4,589)	2,862
Other liabilities	(2,443)	(2,052)
Net cash from operating activities	9,177	21,437
Cash flows from investing activities:
Net cash used by investing activities	(55,201)	(186,961)
Cash flows (used by) from financing activities:
Proceeds from stock options exercised	705	1,117
Common stock repurchased for employee/director taxes paid on restricted stock awards	(204)	(251)
Common stock repurchased	(4,800)
Dividends paid on common stock	(2,856)	(1,915)
Net cash (used by) from financing activities	59,023	179,388
NET INCREASE IN CASH AND CASH EQUIVALENTS	12,999	13,864
CASH AND CASH EQUIVALENTS, beginning of year	32,779	18,915
CASH AND CASH EQUIVALENTS, end of year	45,778	32,779
FS Bancorp, Inc.
Cash flows from operating activities:
Net income	22,717	24,347
Equity in undistributed net income of subsidiary	(19,429)	(23,570)
Amortization	20	20
ESOP compensation expense for allocated shares	1,231	940
Share-based compensation expense related to stock options and restricted stock	869	767
Other assets	3	115
Other liabilities	11	6
Net cash from operating activities	5,422	2,625
Cash flows from investing activities:
Net proceeds from ESOP	275	269
Net cash used by investing activities	275	269
Cash flows (used by) from financing activities:
Proceeds from stock options exercised	705	1,117
Common stock repurchased for employee/director taxes paid on restricted stock awards	(204)	(251)
Common stock repurchased	(4,800)
Dividends paid on common stock	(2,856)	(1,915)
Net cash (used by) from financing activities	(7,155)	(1,049)
NET INCREASE IN CASH AND CASH EQUIVALENTS	(1,458)	1,845
CASH AND CASH EQUIVALENTS, beginning of year	7,026	5,181
CASH AND CASH EQUIVALENTS, end of year	$ 5,568	$ 7,026