FS Bancorp (FSBW) 10-Q 9 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Aug. 03, 2018
Document And Entity Information
Entity Registrant Name	FS Bancorp, Inc.
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Entity Central Index Key	1,530,249
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Entity Common Stock, Shares Outstanding		3,708,660

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 3,429	$ 3,043
Interest-bearing deposits at other financial institutions	18,548	15,872
Total cash and cash equivalents	21,977	18,915
Certificates of deposit at other financial institutions	17,611	18,108
Securities available-for-sale, at fair value	98,465	82,480
Loans held for sale, at fair value	55,191	53,463
Loans receivable, net	881,200	761,558
Accrued interest receivable	4,071	3,566
Premises and equipment, net	16,273	15,458
Federal Home Loan Bank ("FHLB") stock, at cost	7,742	2,871
Bank owned life insurance ("BOLI"), net	13,498	10,328
Servicing rights, held at the lower of cost or fair value	8,352	6,795
Goodwill	2,312	2,312
Core deposit intangible, net	1,164	1,317
Other assets	4,686	4,612
TOTAL ASSETS	1,132,542	981,783
LIABILITIES
Noninterest-bearing accounts	184,357	186,890
Interest-bearing accounts	685,756	642,952
Total deposits	870,113	829,842
Borrowings	106,526	7,529
Principal amount	10,000	10,000
Unamortized debt issuance costs	(145)	(155)
Total subordinated note less unamortized debt issuance costs	9,855	9,845
Deferred tax liability, net	27	607
Other liabilities	16,650	11,958
Total liabilities	1,003,171	859,781
COMMITMENTS AND CONTINGENCIES (NOTE 7)
STOCKHOLDER'S EQUITY
Preferred stock, $.01 par value; 5,000,000 shares authorized; none issued or outstanding	0	0
Common stock, $.01 par value; 45,000,000 shares authorized; 3,708,660 and 3,680,152 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	37	37
Additional paid in capital	56,344	55,135
Retained Earnings (Accumulated Deficit)	76,102	68,422
Accumulated other comprehensive loss, net of tax	(2,127)	(475)
Unearned shares - Employee Stock Ownership Plan ("ESOP")	(985)	(1,117)
Total stockholders' equity	129,371	122,002
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,132,542	$ 981,783

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
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	3,708,660	3,680,152
Common stock, shares outstanding	3,708,660	3,680,152

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
INTEREST INCOME
Loans receivable, including fees	$ 13,135,000	$ 10,401,000	$ 25,391,000	$ 19,773,000
Interest and dividends on investment securities, cash and cash equivalents, and certificates of deposit at other financial institutions	887,000	736,000	1,619,000	1,397,000
Total interest and dividend income	14,022,000	11,137,000	27,010,000	21,170,000
INTEREST EXPENSE
Deposits	1,432,000	896,000	2,675,000	1,748,000
Borrowings	496,000	106,000	576,000	145,000
Subordinated note	169,000	169,000	337,000	336,000
Total interest expense	2,097,000	1,171,000	3,588,000	2,229,000
NET INTEREST INCOME	11,925,000	9,966,000	23,422,000	18,941,000
PROVISION FOR LOAN LOSSES	450,000	0	800,000	0
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	11,475,000	9,966,000	22,622,000	18,941,000
NONINTEREST INCOME
Service charges and fee income	670,000	1,003,000	1,329,000	1,864,000
Gain on sale of loans	4,671,000	4,460,000	8,649,000	8,815,000
Gain on sale of investment securities	0	237,000	113,000	237,000
Gain on sale of mortgage servicing rights ("MSR")	0	958,000	0	958,000
Earnings on cash surrender value of BOLI	88,000	71,000	170,000	140,000
Other noninterest income	185,000	228,000	377,000	363,000
Total noninterest income	5,614,000	6,957,000	10,638,000	12,377,000
NONINTEREST EXPENSE
Salaries and benefits	7,671,000	6,916,000	14,719,000	13,034,000
Operations	1,541,000	1,443,000	2,901,000	2,929,000
Occupancy	704,000	645,000	1,353,000	1,289,000
Data processing	679,000	593,000	1,319,000	1,160,000
Loan costs	704,000	543,000	1,332,000	1,252,000
Professional and board fees	463,000	402,000	907,000	883,000
Federal Deposit Insurance Corporation (FDIC) insurance	90,000	119,000	131,000	253,000
Marketing and advertising	215,000	182,000	364,000	320,000
Amortization of core deposit intangible	77,000	100,000	153,000	200,000
Impairment on servicing rights	0	1,000	0	1,000
Total noninterest expense	12,144,000	10,944,000	23,179,000	21,321,000
INCOME BEFORE PROVISION FOR INCOME TAXES	4,945,000	5,979,000	10,081,000	9,997,000
PROVISION FOR INCOME TAXES	688,000	1,620,000	1,502,000	3,045,000
NET INCOME	$ 4,257,000	$ 4,359,000	$ 8,579,000	$ 6,952,000
Basic earnings per share (in dollars per share)	$ 1.19	$ 1.50	$ 2.40	$ 2.40
Diluted earnings per share (in dollars per share)	$ 1.13	$ 1.41	$ 2.28	$ 2.25

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 4,257	$ 4,359	$ 8,579	$ 6,952
Securities available-for-sale:
Unrealized holding gain (loss) during year	(524)	767	(1,991)	931
Income tax (provision) benefit related to unrealized holding gain	113	(270)	428	(328)
Reclassification adjustment for realized gain included in net income	0	(237)	(113)	(237)
Income tax provision related to reclassification for realized gain	0	83	24	83
Other comprehensive income (loss), net of tax	(411)	343	(1,652)	449
COMPREHENSIVE INCOME	$ 3,846	$ 4,702	$ 6,927	$ 7,401

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 Income	Unearned ESOP Shares	Total
Beginning Balance at (in shares) at Dec. 31, 2016	3,059,503
Beginning balance at Dec. 31, 2016	$ 31	$ 27,334	$ 55,584	$ (536)	$ (1,380)	$ 81,033
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income			6,952			6,952
Dividends paid ($0.20 and $0.24 per share for the period ended June 30, 2017 and 2018, respectively)			(616)			(616)
Share-based compensation		358				358
Common stock repurchase		(275)				(275)
Common stock repurchased (in shares)	(6,198)
Stock options exercised		369				369
Stock options shares exercised (in shares)	21,863
Other comprehensive income (loss), net of tax				449		449
ESOP shares allocated		422			132	554
Ending Balance at (in shares) at Jun. 30, 2017	3,075,168
Ending balance at Jun. 30, 2017	$ 31	28,208	61,920	(87)	(1,248)	88,824
Beginning Balance at (in shares) at Dec. 31, 2017	3,680,152
Beginning balance at Dec. 31, 2017	$ 37	55,135	68,422	(475)	(1,117)	122,002
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income			8,579			8,579
Dividends paid ($0.20 and $0.24 per share for the period ended June 30, 2017 and 2018, respectively)			(899)			(899)
Share-based compensation		285				285
Common stock repurchase		(250)				(250)
Common stock repurchased (in shares)	(4,325)
Stock options exercised		554				554
Stock options shares exercised (in shares)	32,833
Other comprehensive income (loss), net of tax				(1,652)		(1,652)
ESOP shares allocated		620			132	752
Ending Balance at (in shares) at Jun. 30, 2018	3,708,660
Ending balance at Jun. 30, 2018	$ 37	$ 56,344	$ 76,102	$ (2,127)	$ (985)	$ 129,371

Consolidated Statements of Cha7

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Stockholders' Equity [Abstract]
Dividends paid (in dollars per share)	$ 0.24	$ 0.2

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Cash Flows [Abstract]
Net income	$ 8,579,000	$ 6,952,000
Adjustments to reconcile net income to net cash from operating activities
Provision for loan losses	800,000	0
Depreciation, amortization and accretion	2,640,000	1,514,000
Compensation expense related to stock options and restricted stock awards	285,000	358,000
ESOP compensation expense for allocated shares	752,000	554,000
Increase in cash surrender value of BOLI	(170,000)	(140,000)
Gain on sale of loans held for sale	(8,567,000)	(8,815,000)
Gain on sale of portfolio loans	(82,000)	0
Gain on sale of investment securities	(113,000)	(237,000)
Gain on sale of MSR	0	(958,000)
Origination of loans held for sale	(313,203,000)	(311,088,000)
Proceeds from sale of loans held for sale	317,431,000	312,986,000
Impairment on servicing rights	0	1,000
Changes in operating assets and liabilities
Accrued interest receivable	(468,000)	(379,000)
Other assets	(74,000)	(229,000)
Other liabilities	4,565,000	1,200,000
Net cash from operating activities	12,375,000	1,719,000
Activity in securities available-for-sale:
Proceeds from Sale of Debt Securities, Available-for-sale	5,305,000	29,988,000
Maturities, prepayments, sales, and calls	4,315,000	3,653,000
Purchases	(27,845,000)	(30,093,000)
Maturities of certificates of deposit at other financial institutions	496,000	1,240,000
Purchase of certificates of deposit at other financial institutions	0	(4,102,000)
Loan originations and principal collections, net	(104,670,000)	(88,735,000)
Purchase of portfolio loans	(21,618,000)	(26,220,000)
Proceeds from sale of portfolio loans	5,551,000	0
Purchase of premises and equipment, net	(1,649,000)	(323,000)
Purchase of BOLI	(3,000,000)	0
FHLB stock, net	(4,871,000)	(1,190,000)
Proceeds from sale of MSR	0	4,827,000
Net cash used by investing activities	(147,986,000)	(110,955,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	40,271,000	73,104,000
Proceeds from borrowings	513,985,000	217,260,000
Repayments of borrowings	(414,988,000)	(199,260,000)
Dividends paid	(899,000)	(616,000)
Proceeds from stock options exercised	554,000	369,000
Common stock repurchased	(250,000)	(275,000)
Net cash from financing activities	138,673,000	90,582,000
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	3,062,000	(18,654,000)
CASH AND CASH EQUIVALENTS, beginning of period	18,915,000	36,456,000
CASH AND CASH EQUIVALENTS, end of period	21,977,000	17,802,000
Cash paid during the year for:
Interest on deposits and borrowings	3,513,000	2,228,000
Income taxes	1,200,000	2,760,000
SUPPLEMENTARY DISCLOSURES OF NONCASH OPERATING, INVESTING AND FINANCING ACTIVITIES
Change in unrealized (loss) gain on investment securities	(2,105,000)	694,000
Retention of gross mortgage servicing rights from loan sales	$ 2,519,000	$ 2,242,000

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2018
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 13 branches, including the newly opened Silverdale, Washington branch which opened on April 12, 2018, and seven loan production offices in suburban communities in the greater Puget Sound area within Snohomish, King, Pierce, Jefferson, Kitsap, and Clallam counties, and one 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. Pursuant to the Plan of Conversion (the “Plan”), the Company’s Board of Directors adopted an employee stock ownership plan (“ESOP”) which purchased 8% of the common stock in the open market or 259,210 shares. As provided for in the Plan, the Bank also established a liquidation account in the amount of retained earnings at December 31, 2011. The liquidation account is maintained for the benefit of eligible savings account holders at June 30, 2007, and supplemental eligible account holders as of March 31, 2012, who maintain deposit accounts at the Bank after the conversion. The conversion was accounted for as a change in corporate form with the historic basis of the Company’s assets, liabilities, and equity unchanged as a result. Financial Statement Presentation - The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and in accordance with the instructions to Form 10‑Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (“SEC”). It is recommended that these unaudited interim consolidated financial statements be read in conjunction with the Company’s Annual Report on Form 10‑K with all of the audited information and footnotes required by U.S. GAAP for complete financial statements for the year ended December 31, 2017, as filed with the SEC on March 16, 2018. In the opinion of management, all normal adjustments and recurring accruals considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. The results for the three and six months ended June 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018, or any other future period. The preparation of financial statements, in conformity with U.S. GAAP, requires management to make estimates and assumptions that affect amounts reported in the financial statements. Actual results could differ from these estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan and lease losses, fair value of financial instruments, the valuation of servicing rights, and the deferred income taxes. Amounts presented in the consolidated financial statements and footnote tables are rounded and presented in thousands of dollars except per share amounts. In the narrative footnote discussion, amounts are rounded and presented in millions of dollars to one decimal point if the amounts are above $1.0 million. Amounts below $1.0 million are rounded and presented in dollars to the nearest thousands. Certain prior year amounts have been reclassified to conform to the 2018 presentation with no change to consolidated net income or stockholders’ equity previously reported. 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 13 - Business Segments”. Subsequent Events - On July 17, 2018, FS Bancorp, Inc. announced the signing of a definitive merger agreement whereby the Company will acquire Anchor Bancorp (“Anchor”) in a stock and cash transaction valued at approximately $77.0 million. The transaction is subject to customary closing conditions, including the receipt of regulatory approvals and approval of the agreement by the shareholders of Anchor. See “Note 16 – Definitive Agreement”. RECENT ACCOUNTING PRONOUNCEMENTS In February 2016, the Financial Accounting Standards Board (“FASB”) issued 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 a right-of-use 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 a finance lease, interest payments should be recognized separately from amortization of the right-of-use asset in the statement of comprehensive income. For operating leases, the lease cost should be allocated over the lease term on a generally straight-line basis. The amendments in ASU 2016‑02 are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application of the amendments in the ASU is permitted. Once adopted, we expect to report higher assets and liabilities as a result of including right-of-use assets and lease liabilities related to certain banking offices and certain equipment under noncancelable operating lease agreements. As of December 31, 2017, we would have reported an increase of approximately $4. 7 million in both assets and liabilities in the Consolidated Balance Sheets based on management’s estimate assuming the early adoption of this ASU. In June 2016, the FASB issued ASU No. 2016‑13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. 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 measurement of all expected credit losses 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 expected credit losses. 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 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early application will be permitted for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating the impact of this ASU on the Company’s consolidated financial statements. Once adopted, we anticipate our allowance for loan losses to increase through a one‑time adjustment to retained earnings, however, until our evaluation is complete the magnitude of the increase will be unknown. In March 2017, the FASB issued ASU No. 2017‑08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310‑20): Premium Amortization on Purchased Callable Debt Securities . The ASU shortens the amortization period for certain callable debt securities held at a premium. The ASU will take effect for SEC filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The adoption of ASU No. 2017‑08 is not expected to have a material impact on the Company’s consolidated financial statements. In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities . This ASU amends the hedge accounting recognition and presentation requirements in ASC 815 to (1) improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities and (2) reduce the complexity of and simplify the application of hedge accounting by preparers. The amendments in this ASU permit hedge accounting for hedging relationships involving nonfinancial risk and interest rate risk by removing certain limitations in cash flow and fair value hedging relationships. In addition, the ASU requires an entity to present the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedged item is reported. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018 and early adoption is permitted. The adoption of ASU No. 2017-12 is not expected to have a material impact on the Company's consolidated financial statements. In March 2018, the FASB issued ASU No. 2018-05, Income Taxes (Topic 740) . This ASU was issued to provide guidance on the income tax accounting implications of the Tax Cuts and Jobs Act (“Tax Act”) and allows for entities to report provisional amounts for specific income tax effects of the Act for which the accounting under Topic 740 was not yet complete but a reasonable estimate could be determined. A measurement period of one year is allowed to complete the accounting effects under Topic 740 and revise any previous estimates reported. Any provisional amounts or subsequent adjustments included in an entity’s financial statements during the measurement period should be included in income from continuing operations as an adjustment to tax expense in the reporting period the amounts are determined. The Company adopted this ASU with the provisional adjustments as reported in the Consolidated Financial Statements on Form 10-K as of December 31, 2017. As of June 30, 2018, the Company did not incur any adjustments to the provisional recognition. In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718) : Improvements to Nonemployee Share-Based Payment Accounting. This ASU was issued to expand the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. Previously, these awards were recorded at the fair value of consideration received or the fair value of the equity instruments issued and was measured as the earlier of the commitment date or date performance was completed. The amendments in this ASU require the awards to be measured at the grant-date fair value of the equity instrument. ASU No. 2018-07 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, but no earlier than an entity's adoption of Topic 606. The adoption of ASU No. 2018-07 is not expected to have a material impact on the Company's future consolidated financial statements. Application of New Accounting Guidance Adopted in 2018 On January 1, 2018, the Company adopted FASB issued ASU No. 2014‑09, Revenue from Contracts with Customers and all subsequent amendments to the ASU (collectively “ASC 606”) , which created Topic 606 and supersedes Topic 605, Revenue Recognition. In August 2015, FASB issued ASU No. 2015‑14, Revenue from Contracts with Customers (Topic 606) , which postponed the effective date of 2014‑09. The core principle of Topic 606 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In general, the new guidance requires companies to use more judgment and make more estimates than under past guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. For financial reporting purposes, the Company utilized the modified retrospective approach, meaning the ASU is applied only to the most current period presented in the financial statements with the cumulative effect of initially applying the standard recognized at the date of initial application. As a bank holding company, key revenue sources, such as interest income on loans, investment securities and deposits, as well as other sources of income including loan fees, security sales, and derivatives have been identified as out of the scope of this new guidance. Management conducted an assessment of the revenue streams that were affected by the new guidance and identified those considered material and in scope to ensure compliance with the new guidance concluding those related to credit and debit card fees, and service charges and fees on deposit accounts. No additional changes to processes or procedures were identified for the recognition of revenues in scope. The adoption of this ASU did not have a material impact on the Company’s consolidated financial statements. However, additional disclosures required by the ASU have been included in “Note 15 - Revenue from Contracts with Customers” to the Company’s consolidated financial statements. On January 1, 2018, the FASB issued ASU No. 2016‑01, Financial Instruments - Overall (Subtopic 825‑10): Recognition and Measurement of Financial Assets and Financial Liabilities. The new guidance improves the recognition and measurement of financial instruments. This ASU requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes and requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements. Exit price is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. This ASU also eliminates the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The adoption of ASU No. 2016-01 did not have a material impact on the Company’s consolidated financial statements. The disclosures to the Company’s consolidated financial statements have been updated appropriately using the exit price notion in “Note 8 – Fair Value of Financial Instruments”. In May 2018, the FASB issued ASU No. 2018-06, Codification Improvements to Topic 942, Financial Services - Depository and Lending. This ASU updates outdated guidance related to the Office of Comptroller of the Currency’s (OCC) Banking Circular 202, Accounting for Net Deferred Tax Charges, as the guidance has been rescinded by OCC and is no longer relevant. The amendments in this ASU are effective immediately. The adoption of ASU No. 2018-06 is not expected to have a material impact on the Company's consolidated financial statements.

Securities Available-for-sale

Securities Available-for-sale	6 Months Ended
	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	NOTE 2 - 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 June 30, 2018 and December 31, 2017: June 30, 2018 Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Values SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 16,064 $ 23 $ (165) $ 15,922 Corporate securities 7,092 6 (203) 6,895 Municipal bonds 10,871 — (389) 10,482 Mortgage-backed securities 50,570 24 (1,531) 49,063 U.S. Small Business Administration securities 16,578 — (475) 16,103 Total securities available-for-sale $ 101,175 $ 53 $ (2,763) $ 98,465 December 31, 2017 Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Values SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 9,077 $ 49 $ (11) $ 9,115 Corporate securities 7,113 9 (96) 7,026 Municipal bonds 12,720 148 (82) 12,786 Mortgage-backed securities 40,161 63 (490) 39,734 U.S. Small Business Administration securities 14,014 — (195) 13,819 Total securities available-for-sale $ 83,085 $ 269 $ (874) $ 82,480 At June 30, 2018, the Bank had pledged seven securities held at the FHLB of Des Moines with a carrying value of $10.8 million to secure Washington State public deposits of $7.4 million with a $3.0 million collateral requirement by the Washington Public Deposit Protection Commission. At Decemb er 31, 2017, t he Bank pledged nine securities held at the FHLB of Des Moines with a carrying value of $10.7 million to secure Washington State public deposits of $7.6 million with a $3.2 million minimum collateral requirement by the Washington Public Deposit Protection Commission. Investment securities that were in an unrealized loss position at June 30, 2018 and December 31, 2017 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. June 30, 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 $ 11,898 $ (165) $ — $ — $ 11,898 $ (165) Corporate securities 4,009 (87) 1,880 (116) 5,889 (203) Municipal bonds 8,659 (212) 1,823 (177) 10,482 (389) Mortgage-backed securities 27,807 (671) 17,532 (860) 45,339 (1,531) U.S. Small Business Administration securities 12,999 (358) 3,105 (117) 16,104 (475) Total $ 65,372 $ (1,493) $ 24,340 $ (1,270) $ 89,712 $ (2,763) December 31, 2017 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 $ 2,987 $ (11) $ — $ — $ 2,987 $ (11) Corporate securities 4,102 (15) 1,915 (81) 6,017 (96) Municipal bonds 5,982 (82) — — 5,982 (82) Mortgage-backed securities 7,262 (61) 20,635 (429) 27,897 (490) U.S. Small Business Administration securities 11,876 (162) 1,943 (33) 13,819 (195) Total $ 32,209 $ (331) $ 24,493 $ (543) $ 56,702 $ (874) There were 45 investments with unrealized losses of less than one year, and 18 investments with unrealized losses of more than one year at June 30, 2018. There were 21 investments with unrealized losses of less than one year, and 17 investments with unrealized losses of more than one year at December 31, 2017. The unrealized losses associated with these investments are believed to be caused by changes in market interest rates that are considered to be temporary and the Company does not intend to sell the 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 other-than-temporary impairment was recorded for the six months ended June 30, 2018, or for the year ended December 31, 2017. The contractual maturities of securities available-for-sale at June 30, 2018 and December 31, 2017 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. June 30, 2018 December 31, 2017 Amortized Fair Amortized Fair Cost Value Cost Value U.S. agency securities Due after five years through ten years $ 11,066 $ 10,994 $ 4,079 $ 4,124 Due after ten years 4,998 4,928 4,998 4,991 Subtotal 16,064 15,922 9,077 9,115 Corporate securities Due after one year through five years 6,096 5,990 5,117 5,111 Due after five years through ten years 996 905 1,996 1,915 Subtotal 7,092 6,895 7,113 7,026 Municipal bonds Due after one year through five years 2,659 2,589 2,001 2,026 Due after five years through ten years 1,150 1,130 4,111 4,206 Due after ten years 7,062 6,763 6,608 6,554 Subtotal 10,871 10,482 12,720 12,786 Mortgage-backed securities Federal National Mortgage Association (“FNMA”) 33,586 32,675 23,310 23,091 Federal Home Loan Mortgage Corporation (“FHLMC”) 11,185 10,757 10,818 10,629 Government National Mortgage Association (“GNMA”) 5,799 5,631 6,033 6,014 Subtotal 50,570 49,063 40,161 39,734 U.S. Small Business Administration securities Due after five years through ten years 14,672 14,263 12,065 11,896 Due after ten years 1,906 1,840 1,949 1,923 Subtotal 16,578 16,103 14,014 13,819 Total $ 101,175 $ 98,465 $ 83,085 $ 82,480 The proceeds and resulting gains and losses, computed using specific identification from sales of securities available-for-sale for the three and six months ended June 30, 2018 and 2017 were as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2018 Gross Gross Gross Gross Proceeds Gains (Losses) Proceeds Gains (Losses) Securities available-for-sale $ — $ — $ — $ 5,305 $ 113 $ — Three Months Ended Six Months Ended June 30, 2017 June 30, 2017 Gross Gross Gross Gross Proceeds Gains (Losses) Proceeds Gains (Losses) Securities available-for-sale $ $ $ — $ 29,988 $ 237 $ —

Loans Receivable and Allowance

Loans Receivable and Allowance For Loan Losses	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Loans Receivable and Allowance For Loan Losses	NOTE 3 - LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES The composition of the loan portfolio was as follows at June 30, 2018 and December 31, 2017: June 30, December 31, 2018 2017 REAL ESTATE LOANS Commercial $ 64,599 $ 63,611 Construction and development 160,521 143,068 Home equity 25,460 25,289 One-to-four-family (excludes loans held for sale) 177,988 163,655 Multi-family 47,695 44,451 Total real estate loans 476,263 440,074 CONSUMER LOANS Indirect home improvement 147,067 130,176 Solar 42,189 41,049 Marine 48,591 35,397 Other consumer 2,027 2,046 Total consumer loans 239,874 208,668 COMMERCIAL BUSINESS LOANS Commercial and industrial 110,962 83,306 Warehouse lending 66,681 41,397 Total commercial business loans 177,643 124,703 Total loans receivable, gross 893,780 773,445 Allowance for loan losses (11,571) (10,756) Deferred costs and fees, net (2,885) (2,708) Premiums on purchased loans 1,876 1,577 Total loans receivable, net $ 881,200 $ 761,558 Most of the Company’s commercial and multi-family real estate, construction, residential, and/or commercial business lending activities are with customers located in the greater Puget Sound area and near our 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 are originated through a network of home improvement contractors and dealers located throughout Washington, Oregon, California, Idaho, Colorado, and Arizona. The Company also originates solar loans through contractors and dealers in the state of California. Loans are generally secured by collateral and rights to collateral vary and are legally documented to the extent practicable. Local economic conditions may affect borrowers’ ability to meet the stated repayment terms. 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. 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 located in the states we originate consumer loans. Other Consumer. Loans originated by the Company, including automobiles, recreational vehicles, direct home improvement loans, loans on deposits, and other consumer loans, primarily consisting of personal lines of credit. 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 our standard 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 principles 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 at or for the three and six months ended June 30, 2018 and 2017: At or For the Three Months Ended June 30, 2018 Commercial Real Estate Consumer Business Unallocated Total ALLOWANCE FOR LOAN LOSSES Beginning balance $ 4,780 $ 2,934 $ 2,311 $ 1,115 $ 11,140 Provision for loan losses 330 285 255 (420) 450 Charge-offs (1) (223) — — (224) Recoveries 16 188 1 — 205 Net recoveries (charge-offs) 15 (35) 1 — (19) Ending balance $ 5,125 $ 3,184 $ 2,567 $ 695 $ 11,571 Period end amount allocated to: Loans individually evaluated for impairment $ 21 $ 109 $ — $ — $ 130 Loans collectively evaluated for impairment 5,104 3,075 2,567 695 11,441 Ending balance $ 5,125 $ 3,184 $ 2,567 $ 695 $ 11,571 LOANS RECEIVABLE Loans individually evaluated for impairment $ 317 $ 310 $ — $ — $ 627 Loans collectively evaluated for impairment 475,946 239,564 177,643 — 893,153 Ending balance $ 476,263 $ 239,874 $ 177,643 $ — $ 893,780 At or For the Six Months Ended June 30, 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 for loan losses 343 370 550 (463) 800 Charge-offs (4) (451) — — (455) Recoveries 16 451 3 — 470 Net recoveries 12 — 3 — 15 Ending balance $ 5,125 $ 3,184 $ 2,567 $ 695 $ 11,571 Period end amount allocated to: Loans individually evaluated for impairment $ 21 $ 109 $ — $ — $ 130 Loans collectively evaluated for impairment 5,104 3,075 2,567 695 11,441 Ending balance $ 5,125 $ 3,184 $ 2,567 $ 695 $ 11,571 LOANS RECEIVABLE Loans individually evaluated for impairment $ 317 $ 310 $ — $ — $ 627 Loans collectively evaluated for impairment 475,946 239,564 177,643 — 893,153 Ending balance $ 476,263 $ 239,874 $ 177,643 $ — $ 893,780 At or For the Three Months Ended June 30, 2017 Commercial Real Estate Consumer Business Unallocated Total ALLOWANCE FOR LOAN LOSSES Beginning balance $ 3,813 $ 2,588 $ 2,169 $ 1,577 $ 10,147 Provision for loan losses 331 87 282 (700) — Charge-offs — (179) — — (179) Recoveries — 173 2 — 175 Net (charge-offs) recoveries — (6) 2 — (4) Ending balance $ 4,144 $ 2,669 $ 2,453 $ 877 $ 10,143 Period end amount allocated to: Loans individually evaluated for impairment $ — $ — $ — $ — $ — Loans collectively evaluated for impairment 4,144 2,669 2,453 877 10,143 Ending balance $ 4,144 $ 2,669 $ 2,453 $ 877 $ 10,143 LOANS RECEIVABLE Loans individually evaluated for impairment $ 439 $ — $ — $ — $ 439 Loans collectively evaluated for impairment 397,256 190,729 131,878 — 719,863 Ending balance $ 397,695 $ 190,729 $ 131,878 $ — $ 720,302 At or For the Six Months Ended June 30, 2017 Commercial Real Estate Consumer Business Unallocated Total ALLOWANCE FOR LOAN LOSSES Beginning balance $ 3,547 $ 2,082 $ 2,675 $ 1,907 $ 10,211 Provision for loan losses 596 661 (227) (1,030) — Charge-offs — (384) — — (384) Recoveries 1 310 5 — 316 Net recoveries (charge-offs) 1 (74) 5 — (68) Ending balance $ 4,144 $ 2,669 $ 2,453 $ 877 $ 10,143 Period end amount allocated to: Loans individually evaluated for impairment $ — $ — $ — $ — $ — Loans collectively evaluated for impairment 4,144 2,669 2,453 877 10,143 Ending balance $ 4,144 $ 2,669 $ 2,453 $ 877 $ 10,143 LOANS RECEIVABLE Loans individually evaluated for impairment $ 439 $ — $ — $ — $ 439 Loans collectively evaluated for impairment 397,256 190,729 131,878 — 719,863 Ending balance $ 397,695 $ 190,729 $ 131,878 $ — $ 720,302 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 following tables provide information pertaining to the aging analysis of contractually past due loans and non-accrual loans at June 30, 2018 and December 31, 2017: June 30, 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 $ — $ — $ — $ — $ 64,599 $ 64,599 $ — Construction and development — — — — 160,521 160,521 — Home equity — — 72 72 25,388 25,460 176 One-to-four-family — 141 — 141 177,847 177,988 141 Multi-family — — — — 47,695 47,695 — Total real estate loans — 141 72 213 476,050 476,263 317 CONSUMER LOANS Indirect home improvement 360 127 114 601 146,466 147,067 274 Solar 24 44 16 84 42,105 42,189 35 Marine 16 — — 16 48,575 48,591 — Other consumer 11 1 — 12 2,015 2,027 1 Total consumer loans 411 172 130 713 239,161 239,874 310 COMMERCIAL BUSINESS LOANS Commercial and industrial — — — — 110,962 110,962 — Warehouse lending — — — — 66,681 66,681 — Total commercial business loans — — — — 177,643 177,643 — Total loans $ 411 $ 313 $ 202 $ 926 $ 892,854 $ 893,780 $ 627 December 31, 2017 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 $ — $ — $ — $ — $ 63,611 $ 63,611 $ — Construction and development — — — — 143,068 143,068 — Home equity 122 — 136 258 25,031 25,289 151 One-to-four-family 142 — — 142 163,513 163,655 142 Multi-family — — — — 44,451 44,451 — Total real estate loans 264 — 136 400 439,674 440,074 293 CONSUMER LOANS Indirect home improvement 255 215 99 569 129,607 130,176 195 Solar 49 19 — 68 40,981 41,049 — Marine — — — — 35,397 35,397 — Other consumer — — — — 2,046 2,046 — Total consumer loans 304 234 99 637 208,031 208,668 195 COMMERCIAL BUSINESS LOANS Commercial and industrial — 551 — 551 82,755 83,306 551 Warehouse lending — — — — 41,397 41,397 — Total commercial business loans — 551 — 551 124,152 124,703 551 Total loans $ 568 $ 785 $ 235 $ 1,588 $ 771,857 $ 773,445 $ 1,039 There were no loans 90 days or more past due and still accruing interest at June 30, 2018 and December 31, 2017. The following tables provide additional information about our impaired loans that have been segregated to reflect loans for which an allowance for credit losses has been provided and loans for which no allowance was provided at June 30, 2018 and December 31, 2017: June 30, 2018 Unpaid Principal Recorded Related Balance Impairment Investment Allowance WITH NO RELATED ALLOWANCE RECORDED Home equity $ 176 $ — $ 176 $ — WITH RELATED ALLOWANCE RECORDED One-to-four-family 141 — 141 21 Consumer loans 310 — 310 109 451 — 451 130 Total $ 627 $ — $ 627 $ 130 December 31, 2017 Unpaid Principal Recorded Related Balance Impairment Investment Allowance WITH NO RELATED ALLOWANCE RECORDED Home equity $ 151 $ — $ 151 $ — One-to-four-family 67 (12) 55 — Total real estate loans 218 (12) 206 — Commercial business loans 551 — 551 — 769 (12) 757 — WITH RELATED ALLOWANCE RECORDED One-to-four-family 142 — 142 21 Consumer loans 195 — 195 68 337 — 337 89 Total $ 1,106 $ (12) $ 1,094 $ 89 The following table presents the average recorded investment in loans individually evaluated for impairment and the interest income recognized and received for the three and six months ended June 30, 2018 and 2017: At or For the Three Months Ended June 30, 2018 June 30, 2017 Average Recorded Interest Income Average Recorded Interest Income Investment Recognized Investment Recognized WITH NO RELATED ALLOWANCE RECORDED Home equity $ 148 $ 1 $ 240 $ — One-to-four-family (1) — — 201 1 Total real estate loans 148 1 441 1 WITH RELATED ALLOWANCE RECORDED One-to-four-family 271 1 — — Consumer loans 292 6 — — 563 7 — — Total $ 711 $ 8 $ 441 $ 1 ________________________ (1) Includes loans supported by Federal Housing Administration (“FHA”) guarantees. At or For the Six Months Ended June 30, 2018 June 30, 2017 Average Recorded Interest Income Average Recorded Interest Income Investment Recognized Investment Recognized WITH NO RELATED ALLOWANCE RECORDED Home equity $ 182 $ 3 $ 230 $ — One-to-four-family (1) — — 178 4 Total real estate loans 182 3 408 4 WITH AN ALLOWANCE RECORDED One-to-four-family 271 3 — — Consumer loans 276 11 — — 547 14 — — Total $ 729 $ 17 $ 408 $ 4 _______________________ (1) Includes loans supported by FHA guarantees. 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. Consumer, Home Equity, and One-to-Four-Family Real Estate Loans Homogeneous loans are risk rated based upon the Federal Financial Institutions Examination Council’s Uniform Retail Credit Classification and Account Management Policy. Loans classified under this policy at the Company are consumer loans which include indirect home improvement, solar, marine, other consumer, and one-to-four-family first and second liens. Under the Uniform Retail Credit Classification Policy, loans that are current or less than 90 days past due are graded “Pass” and risk rated “4” or “5” internally. Loans that are past due more than 90 days are classified “Substandard” and risk rated “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. The following tables summarize risk rated loan balances by category at the dates indicated: June 30, 2018 Special Pass Watch Mention Substandard Doubtful Loss (1 - 5) (6) (7) (8) (9) (10) Total REAL ESTATE LOANS Commercial $ 64,599 $ — $ — $ — $ — $ — $ 64,599 Construction and development 160,521 — — — — — 160,521 Home equity 25,284 — — 176 — — 25,460 One-to-four-family 177,847 — — 141 — — 177,988 Multi-family 47,695 — — — — — 47,695 Total real estate loans 475,946 — — 317 — — 476,263 CONSUMER LOANS Indirect home improvement 146,793 — — 274 — — 147,067 Solar 42,154 — — 35 — — 42,189 Marine 48,591 — — — — — 48,591 Other consumer 2,026 — — 1 — — 2,027 Total consumer loans 239,564 — — 310 — — 239,874 COMMERCIAL BUSINESS LOANS Commercial and industrial 103,262 2,228 338 5,134 — — 110,962 Warehouse lending 66,681 — — — — — 66,681 Total commercial business loans 169,943 2,228 338 5,134 — — 177,643 Total loans receivable, gross $ 885,453 $ 2,228 $ 338 $ 5,761 $ — $ — $ 893,780 December 31, 2017 Special Pass Watch Mention Substandard Doubtful Loss (1 - 5) (6) (7) (8) (9) (10) Total REAL ESTATE LOANS Commercial $ 62,057 $ — $ 1,554 $ — $ — $ — $ 63,611 Construction and development 143,068 — — — — — 143,068 Home equity 25,138 — — 151 — — 25,289 One-to-four-family 163,513 — — 142 — — 163,655 Multi-family 44,451 — — — — — 44,451 Total real estate loans 438,227 — 1,554 293 — — 440,074 CONSUMER LOANS Indirect home improvement 129,981 — — 195 — — 130,176 Solar 41,049 — — — — — 41,049 Marine 35,397 — — — — — 35,397 Other consumer 1,998 — — 48 — — 2,046 Total consumer loans 208,425 — — 243 — — 208,668 COMMERCIAL BUSINESS LOANS Commercial and industrial 76,942 — 425 5,939 — — 83,306 Warehouse lending 40,724 673 — — — — 41,397 Total commercial business loans 117,666 673 425 5,939 — — 124,703 Total loans receivable, gross $ 764,318 $ 673 $ 1,979 $ 6,475 $ — $ — $ 773,445

Servicing Rights

Servicing Rights	6 Months Ended
	Jun. 30, 2018
Fair Value, Off-balance Sheet Risk [Abstract]
Servicing Rights	NOTE 4 - SERVICING RIGHTS Loans serviced for others are not included on the Consolidated Balance Sheets. The unpaid principal balances of permanent loans serviced for others were $955.1 million and $778.9 million at June 30, 2018 and December 31, 2017, respectively, and are carried at the lower of cost or market. The following table summarizes servicing rights activity for the three and six months ended June 30, 2018 and 2017: At or For the Three Months Ended June 30, 2018 2017 Beginning balance $ 7,515 $ 8,939 Additions 1,381 1,253 Sales — (4,751) Servicing rights amortized (544) (541) Impairment on servicing rights — (1) Ending balance $ 8,352 $ 4,899 At or For the Six Months Ended June 30, 2018 2017 Beginning balance $ 6,795 $ 8,459 Additions 2,519 2,242 Sales — (4,751) Servicing rights amortized (962) (1,050) Impairment on servicing rights — (1) Ending balance $ 8,352 $ 4,899 The fair market value of the permanent servicing rights’ assets was $12.0 million and $8.6 million at June 30, 2018 and December 31, 2017, 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 June 30, 2018 2017 Key assumptions: Weighted average discount rate 9.5 % 9.5 % Conditional prepayment rate (“CPR”) 9.0 % 10.3 % Weighted average life in years 8.0 7.1 Key economic assumptions and the sensitivity of the current fair value for single family MSR to immediate adverse changes in those assumptions at June 30, 2018 and December 31, 2017 were as follows: June 30, 2018 December 31, 2017 Aggregate portfolio principal balance $ 952,257 $ 775,093 Weighted average rate of note 4.2 % % At June 30, 2018 Base 0.5%Adverse Rate Change 1.0%Adverse Rate Change Conditional prepayment rate 9.0 % 10.9 % 15.3 % Fair value MSR $ 12,016 $ 10,752 $ 9,162 Percentage of MSR 1.3 % 1.1 % 1.0 % Discount rate 9.8 % 10.3 % 10.8 % Fair value MSR $ 12,016 $ 11,754 $ 11,503 Percentage of MSR 1.3 % 1.2 % 1.2 % At December 31, 2017 Base 0.5%Adverse Rate Change 1.0%Adverse Rate Change Conditional prepayment rate 10.9 % 17.7 % 24.5 % Fair value MSR $ 8,602 $ 6,811 $ 5,614 Percentage of MSR 1.1 % 0.9 % 0.7 % Discount rate 9.6 % 10.1 % 10.6 % Fair value MSR $ 8,602 $ 8,433 $ 8,271 Percentage of MSR 1.1 % 1.1 % 1.1 % 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 tables reference a 50 basis point and 100 basis point decrease in note 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 at a particular point in time. Those assumptions may not be appropriate if they are applied to a different point in time. The Company recorded $573,000 and $682,000 of gross contractually specified servicing fees, late fees, and other ancillary fees resulting from servicing mortgage and commercial loans for the three months ended June 30, 2018 and 2017, respectively, and $1.1 million and $1.3 million for the six months ended June 30, 2018 and 2017, respectively. The income, net of amortization, is reported in noninterest income on the Consolidated Statements of Income.

Derivatives

Derivatives	6 Months Ended
	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	NOTE 5 - DERIVATIVES The Company regularly enters into commitments to originate and sell loans held for sale. The Company has established a hedging strategy to protect itself against the risk of loss associated with interest rate movements on loan commitments. The Company enters into contracts to sell forward To-Be-Announced (“TBA”) mortgage-backed securities. These commitments and contracts are considered derivatives but have not been designated as hedging instruments for reporting purposes under U.S. GAAP. Rather, they are accounted for as free-standing derivatives, or economic hedges, with changes in the fair value of the derivatives reported in noninterest income. 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: June 30, 2018 Fair Value Notional Asset Liability Fallout adjusted interest rate lock commitments with customers $ 49,621 $ 1,138 $ — Mandatory and best effort forward commitments with investors 24,739 — 18 Forward TBA mortgage-backed securities 70,000 — 199 TBA mortgage-backed securities forward sales paired off with investors 21,500 — 22 December 31, 2017 Fair Value Notional Asset Liability Fallout adjusted interest rate lock commitments with customers $ 31,951 $ 726 $ — Mandatory and best effort forward commitments with investors 12,505 51 — Forward TBA mortgage-backed securities 66,500 — 65 TBA mortgage-backed securities forward sales paired off with investors 36,500 53 — At June 30, 2018 and December 31, 2017, the Company had $70.0 million and $66.5 million of unsettled TBA trades with counterparties that required margin collateral of $220,000 and $75,000, 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 net gains of $403,000 and $114,000 for the three months ended June 30, 2018 and 2017, respectively, and net gain (loss) of $484,000 and $(381,000) for the six months ended June 30, 2018 and 2017, respectively.

Deposits

Deposits	6 Months Ended
	Jun. 30, 2018
Banking and Thrift [Abstract]
Deposits	NOTE 6 - DEPOSITS Deposits are summarized as follows at June 30, 2018 and December 31, 2017: June 30, December 31, 2018 (1) 2017 (1) Noninterest-bearing checking $ 172,848 $ 177,739 Interest-bearing checking 128,080 119,872 Savings 77,631 72,082 Money market (2) 210,742 228,742 Certificates of deposit less than $100,000 (3) 144,755 111,489 Certificates of deposit of $100,000 through $250,000 79,131 77,934 Certificates of deposit of $250,000 and over (4) 45,417 32,833 Escrow accounts related to mortgages serviced 11,509 9,151 Total $ 870,113 $ 829,842 (1) Includes $124.0 million of deposits at June 30, 2018 (that which is remaining from the purchase of four retail bank branches from Bank of America, National Association on January 22, 2016) and $134.6 million at December 31, 2017. (2) Includes $4.0 million of brokered deposits at June 30, 2018 and $6.5 million at December 31, 2017. (3) Includes $86.6 million and $59.3 million of brokered deposits at June 30, 2018 and December 31, 2017, respectively. (4) Time deposits that meet or exceed the FDIC insurance limit. Federal Reserve regulations require that the Bank maintain reserves in the form of cash on hand and deposit balances with the Federal Reserve Bank based on a percentage of deposits. The amounts of such balances at June 30, 2018 and December 31, 2017 were $17.9 million and $18.2 million, respectively. Scheduled maturities of time deposits at June 30, 2018 for future periods ending are as follows: At June 30, 2018 Maturing in 2018 $ 89,416 Maturing in 2019 90,581 Maturing in 2020 46,314 Maturing in 2021 23,286 Maturing in 2022 17,779 Thereafter 1,927 Total $ 269,303 Interest expense by deposit category for the three and six months ended June 30, 2018 and 2017 is as follows: Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Interest-bearing checking $ 63 $ 14 $ 130 $ 22 Savings and money market 393 312 712 581 Certificates of deposit 976 570 1,833 1,145 Total $ 1,432 $ 896 $ 2,675 $ 1,748

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 7 - 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 June 30, 2018 and December 31, 2017: June 30, December 31, 2018 2017 COMMITMENTS TO EXTEND CREDIT REAL ESTATE LOANS Commercial $ 108 $ 107 Construction and development 79,038 73,321 One-to-four-family (includes locks for salable loans) 55,817 37,336 Home equity 35,750 32,889 Multi-family 616 438 Total real estate loans 171,329 144,091 CONSUMER LOANS 10,184 10,041 COMMERCIAL BUSINESS LOANS Commercial and industrial 53,995 52,452 Warehouse lending 44,019 78,303 Total commercial business loans 98,014 130,755 Total commitments to extend credit $ 279,527 $ 284,887 Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Since many of the commitments are expected to expire without being drawn upon, the amount of the total commitments do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon an extension of credit, is based on management’s credit evaluation of the party. Collateral held varies, but may include accounts receivable, inventory, property and equipment, residential real estate, and income-producing commercial properties. Unfunded commitments under commercial lines of credit, revolving credit lines, and overdraft protection agreements are commitments for possible future extensions of credit to existing customers. These lines of credit are uncollateralized and usually do not contain a specified maturity date and ultimately may not be drawn upon to the total extent to which the Company is committed. The Company has established reserves for estimated losses from unfunded commitments of $230,000 at June 30, 2018 and $253,000 at December 31, 2017. One-to-four-family commitments included in the table above are accounted for as fair value derivatives and do not carry an associated loss reserve. 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 June 30, 2018, the total loans sold to the FHLB of Des Moines were $57.6 million with the FLA totalling $633,000 and the CE obligation at $367,000 or 0.64% of the loans outstanding. The holdback for CE obligations is included in the contingent liabilities detailed below. There were no outstanding delinquencies on the loans sold to the FHLB of Des Moines at June 30, 2018 and December 31, 2017. 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 reserves of $971,000 and $1.0 million to cover loss exposure related to these guarantees for one-to-four-family loans sold into the secondary market at June 30, 2018 and December 31, 2017, respectively, which is included in other liabilities on the Consolidated Balance Sheets. The Company has entered into a severance agreement with its Chief Executive Officer. The severance agreement, subject to certain requirements, generally includes a lump sum payment to the Chief Executive Officer equal to 24 months of base compensation in the event his employment is involuntarily terminated, other than for cause or the executive terminates his employment with good reason, as defined in the severance agreement. The Company has entered into change of control agreements with its Chief Financial Officer/Chief Operating Officer, Chief Lending Officer, Chief Credit Officer, Chief Risk Officer, Chief Human Resources Officer, Senior Vice President Compliance Officer, Executive Vice President of Retail Banking and Marketing, and two Executive Vice Presidents 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. 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 1.6298 when all litigation pending as of the date of the IPO is concluded. However, at June 30, 2018, the date that litigation will be concluded cannot be determined. Until such time, the stock cannot be redeemed or sold by the Bank; therefore, it is not readily marketable and has a current carrying value of $0. Visa, Inc. Class A stock’s market value at June 30, 2018 and December 31, 2017 was $132.45 per share and $114.02 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 June 30, 2018.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	NOTE 8 - FAIR VALUE OF FINANCIAL INSTRUMENTS The Company assumes interest rate risk (the risk that general interest rate levels will change) as a result of its normal operations. Consequently, the fair value of the Company’s consolidated financial instruments will change when interest rate levels change and that change may either be favorable or unfavorable to the Company. Management attempts to match maturities of assets and liabilities to the extent believed necessary to minimize interest rate risk. However, borrowers with fixed interest rate obligations are less likely to prepay in a rising interest rate environment and more likely to prepay in a falling interest rate environment. Conversely, depositors who are receiving fixed interest rates are more likely to withdraw funds before maturity in a rising interest rate environment and less likely to do so in a falling interest rate environment. Management monitors interest rates and maturities of assets and liabilities, and attempts to minimize interest rate risk by adjusting terms of new loans and deposits, and by investing in securities with terms that mitigate the Company’s overall interest rate risk. On January 1, 2018, the Company adopted ASU 2016-01 , Financial Instruments - Overall (Subtopic 825‑10), Recognition and Measurement of Financial Assets and Financial Liabilities, which requires us to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. The Company determines the fair values of its financial instruments based on the requirements established in Accounting Standards Codification (“ASC”) 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 values for financial instruments as the exit price, 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. The Company’s fair values for financial instruments at June 30, 2018 were determined based on these requirements. 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. Determination of Fair Market Values at December 31, 2017: 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. 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 (Level 2). 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 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). The following tables present securities available-for-sale measured at fair value on a recurring basis at the dates indicated: Securities Available-for-Sale Level 1 Level 2 Level 3 Total At June 30, 2018 U.S. agency securities $ — $ 15,922 $ — $ 15,922 Corporate securities — 6,895 — 6,895 Municipal bonds — 10,482 — 10,482 Mortgage-backed securities — 49,063 — 49,063 U.S. Small Business Administration securities — 16,103 — 16,103 Total $ — $ 98,465 $ — $ 98,465 Securities Available-for-Sale Level 1 Level 2 Level 3 Total At December 31, 2017 U.S. agency securities $ — $ 9,115 $ — $ 9,115 Corporate securities — 7,026 — 7,026 Municipal bonds — 12,786 — 12,786 Mortgage-backed securities — 39,734 — 39,734 U.S. Small Business Administration securities — 13,819 — 13,819 Total $ — $ 82,480 $ — $ 82,480 The following table presents mortgage loans held for sale measured at fair value on a recurring basis at the dates indicated: Mortgage Loans Held for Sale Level 1 Level 2 Level 3 Total June 30, 2018 $ — $ 55,191 $ — $ 55,191 December 31, 2017 $ — $ 53,463 $ — $ 53,463 The following tables present the fair value of interest rate lock commitments with customers, individual forward sale commitments with investors, and paired off commitments with investors measured at their fair value on a recurring basis at the dates indicated: Interest Rate Lock Commitments with Customers Level 1 Level 2 Level 3 Total June 30, 2018 $ — $ — $ 1,138 $ 1,138 December 31, 2017 $ — $ — $ 726 $ 726 Individual Forward Sale Commitments with Investors Level 1 Level 2 Level 3 Total June 30, 2018 $ — $ (199) $ (18) $ (217) December 31, 2017 $ — $ (65) $ 51 $ (14) Paired Off Commitments with Investors Level 1 Level 2 Level 3 Total June 30, 2018 $ — $ (22) $ — $ (22) December 31, 2017 $ — $ 53 $ — $ 53 The following table presents impaired loans 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. Impaired Loans Level 1 Level 2 Level 3 Total June 30, 2018 $ — $ — $ 627 $ 627 December 31, 2017 $ — $ — $ 1,094 $ 1,094 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 June 30, 2018: Level 3 Significant Range Weighted Fair Value Instruments Valuation Technique Unobservable Inputs (Weighted Average) Average RECURRING Interest rate lock commitments with customers Quoted market prices Pull-through expectations 80% - 99% 94.8 % Individual forward sale commitments with investors Quoted market prices Pull-through expectations 80% - 99% 94.8 % NONRECURRING Impaired loans Fair value of underlying collateral Discount applied to the obtained appraisal 0% - 25% 20.7 % 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 three and six months ended June 30, 2018 and 2017: Net change in fair value for gains/ Purchases (losses) relating to Beginning and Sales and Ending items held at end of Three Months Ended June 30, Balance Issuances Settlements Balance period 2018 Interest rate lock commitments with customers $ 815 $ 3,140 $ (2,817) $ 1,138 $ 323 Individual forward sale commitments with investors 4 84 (106) (18) (22) 2017 Interest rate lock commitments with customers $ 1,437 $ 4,067 $ (4,292) $ 1,212 $ (225) Individual forward sale commitments with investors (19) (107) 209 83 102 Net change in fair value for gains/ Purchases (losses) relating to Beginning and Sales and Ending items held at end of Six Months Ended June 30, Balance Issuances Settlements Balance year 2018 Interest rate lock commitments with customers $ 726 $ 5,575 $ (5,163) $ 1,138 $ 412 Individual forward sale commitments with investors 51 656 (725) (18) (69) 2017 Interest rate lock commitments with customers $ 818 $ 7,549 $ (7,155) $ 1,212 $ 394 Individual forward sale commitments with investors 177 (303) 209 83 (94) 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. Fair Values of Financial Instruments - The following methods and assumptions were used by the Company in estimating the fair values of financial instruments disclosed in the financial statements at December 31, 2017: Cash, and Cash Equivalents and Certificates of Deposit at Other Financial Institutions - The carrying amounts of cash and short-term instruments approximate their fair value (Level 1). Federal Home Loan Bank stock - The par value of FHLB stock approximates its fair value (Level 2). Bank-owned Life Insurance - The estimated fair value is equal to the cash surrender value of policies, net of surrender charges (Level 1). Accrued Interest - The carrying amount of accrued interest approximates its fair value (Level 2). Loans Receivable, Net - For variable rate loans that re-price frequently and have no significant change in credit risk, fair values are based on carrying values. Fair values for fixed rate loans are estimated using discounted cashflow analyses, using interest rates currently being offered for loans with similar terms to borrowers or similar credit quality (Level 3). Servicing Rights - The fair value of mortgage, commercial, and consumer 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). Deposits - The fair value of deposits with no stated maturity date is included at the amount payable on demand. Fair values for fixed rate certificates of deposit are estimated using a discounted cashflow calculation on interest rates currently offered on similar certificates (Level 2). Borrowings - The carrying amounts of advances maturing within 90 days approximate their fair values. The fair values of long-term advances are estimated using discounted cashflow analyses based on the Bank’s current incremental borrowing rates for similar types of borrowing arrangements (Level 2). Subordinated Note - The fair value of the Subordinated Note is based upon the average yield of debt issuances for similarly sized issuances (Level 2). Off-Balance Sheet Instruments - The fair value of commitments to extend credit are estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreement and the present creditworthiness of the customers. The majority of the Company’s off-balance sheet instruments consist of non-fee producing, variable-rate commitments, the Company has determined they do not have a distinguishable fair value. The fair value of loan lock commitments with customers and investors reflect an estimate of value based upon the interest rate lock date, the expected pull-through percentage for the commitment, and the interest rate at year end (Level 2 and 3). The following table provides estimated fair values of the Company’s financial instruments at June 30, 2018 and December 31, 2017, whether or not recognized at fair value in the Consolidated Balance Sheets: June 30, December 31, 2018 2017 Carrying Fair Carrying Fair Amount Value Amount Value Financial Assets Level 1 inputs: Cash and cash equivalents $ 21,977 $ 21,977 $ 18,915 $ 18,915 Certificates of deposit at other financial institutions 17,611 17,611 18,108 18,108 Level 2 inputs: Securities available-for-sale, at fair value 98,465 98,465 82,480 82,480 Loans held for sale, at fair value 55,191 55,191 53,463 53,463 FHLB stock, at cost 7,742 7,742 2,871 2,871 Accrued interest receivable 4,071 4,071 3,566 3,566 Paired off commitments with investors — — 53 53 Level 3 inputs: Loans receivable, gross 893,780 882,819 773,445 780,551 Servicing rights, held at lower of cost or fair value 8,352 12,022 6,795 8,608 Fair value interest rate locks with customers 1,138 1,138 726 726 Individual forward sale commitments with investors — — 51 51 Financial Liabilities Level 2 inputs: Deposits 870,113 863,210 829,842 838,087 Borrowings 106,526 106,442 7,529 7,498 Subordinated note 9,855 10,741 9,845 10,741 Accrued interest payable 289 289 214 214 Paired off commitments with investors 22 22 — — Individual forward sale commitments with investors 199 199 65 65 Level 3 inputs: Individual forward sale commitments with investors — —

Employee Benefits

Employee Benefits	6 Months Ended
	Jun. 30, 2018
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	NOTE 9 - 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, 2017, the ESOP paid the sixth annual installment of principal in the amount of $263,000, plus accrued interest of $32,000 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 June 30, 2018 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 three months ended June 30, 2018 and 2017 was $393,000 and $317,000, respectively, and $752,000 and $554,000 for the six months ended June 30, 2018 and 2017, respectively. Shares held by the ESOP at June 30, 2018 and 2017 were as follows (shown as actual): Balances Balances at June 30, 2018 at June 30, 2017 Allocated shares 153,049 126,589 Committed to be released shares 12,960 12,960 Unallocated shares 90,724 116,645 Total ESOP shares 256,733 256,194 Fair value of unallocated shares (in thousands) $ 5,262 $ 4,987

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 10 - EARNINGS PER SHARE 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. Diluted earnings per share reflect the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity. For earnings per share calculations, the ESOP shares committed to be released are included as outstanding shares for both basic and diluted earnings per share. The following table presents a reconciliation of the components used to compute basic and diluted earnings per share for the three and six months ended June 30, 2018 and 2017: At or For the Three Months Ended June 30, At or For the Six Months Ended June 30, Numerator: 2018 2017 2018 2017 Net income (in thousands) $ 4,257 $ 4,359 $ 8,579 $ 6,952 Denominator: Basic weighted average common shares outstanding 3,583,927 2,903,323 3,573,560 2,891,116 Dilutive shares 181,797 194,305 188,519 193,276 Diluted weighted average common shares outstanding 3,765,724 3,097,628 3,762,079 3,084,392 Basic earnings per share $ 1.19 $ 1.50 $ 2.40 $ 2.40 Diluted earnings per share $ 1.13 $ 1.41 $ 2.28 $ 2.25

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	NOTE 11 - STOCK-BASED COMPENSATION Stock Options and Restricted Stock On May 17, 2018, the shareholders of FS Bancorp, Inc. approved a 2018 Equity Incentive Plan (“2018 Plan”) that authorizes 650,000 shares of the Company’s common stock to be issued as 25% restricted stock awards (163,000) or 75% granted as stock options (487,000). As of June 30, 2018, none of the restricted stock or stock option grants have been issued. In September 2013, the shareholders of FS Bancorp, Inc. approved the FS Bancorp, Inc. 2013 Equity Incentive Plan (“Plan”). The Plan provides for the grant of stock options and restricted stock awards. Total share-based compensation expense for the Plan was $150,000 and $285,000 for the three and six months ended June 30, 2018 respectively, and $166,000 and $358,000 for the three and six months ended June 30, 2017, respectively. Stock Options The Plan authorizes the grant of stock options totaling 324,013 shares of common stock to Company directors and employees of which 322,000 option share awards under the Plan 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. These option awards were granted as non-qualified stock options, having a vesting period of five years, with 20% vesting on the anniversary date of each grant date, and a contractual life of 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 June 30, 2018, 6,013 option share awards are available to be granted. The fair value of each 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 6.5 years. The following table presents a summary of the Company’s stock option plan awards during the six months ended June 30, 2018 (shown as actual): Weighted-Average Weighted- Remaining Average Contractual Term In Aggregate Shares Exercise Price Years Intrinsic Value Outstanding at January 1, 2018 256,237 $ 16.89 6.36 $ 9,655,010 Granted — — — — Less exercised 32,833 $ 16.89 — $ 1,318,296 Forfeited or expired — — — — Outstanding at June 30, 2018 223,404 $ 16.89 5.63 $ 10,357,009 Expected to vest, assuming a 0.31% annual forfeiture rate (1) 223,242 $ 16.89 5.63 $ 10,349,515 Exercisable at June 30, 2018 162,604 $ 16.89 5.54 $ 7,538,321 (1) Forfeiture rate has been calculated and estimated to assume a forfeiture of 1/32 over the 10-year contractual life, or 3.1% of the options forfeited over 10 years. At June 30, 2018, there was $188,000 of total unrecognized compensation cost related to nonvested stock options granted under the Plan. The cost is expected to be recognized over the remaining weighted-average vesting period of 10 months. Restricted Stock Awards The Plan authorizes the grant of restricted stock awards totaling 129,605 shares to Company directors 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 restricted stock awards were granted January 1, 2016 at a grant date fair value of $26.00 per share. Compensation expense is recognized over the vesting period of the awards based on the fair value of the restricted stock. The restricted stock awards’ fair value is equal to the value on the grant date. Shares awarded as restricted stock vest ratably over a three-year period for directors and a five-year period for employees, beginning at the grant date. Any unvested restricted stock awards 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 six months ended June 30, 2018 (shown as actual): Weighted-Average Grant-Date Fair Value Nonvested Shares Shares Per Share Nonvested at January 1, 2018 36,842 $ 17.63 Granted — — Less vested 18,421 $ 17.63 Forfeited or expired — — Nonvested at June 30, 2018 18,421 $ 17.63 At June 30, 2018, there was $264,000 of total unrecognized compensation costs related to nonvested shares granted as restricted stock awards. The cost is expected to be recognized over the remaining weighted-average vesting period of 10 months.

Regulatory Capital

Regulatory Capital	6 Months Ended
	Jun. 30, 2018
Regulatory Capital Requirements [Abstract]
Regulatory Capital	NOTE 12 - REGULATORY CAPITAL The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. 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, Tier 1 leverage, and CET 1 capital ratios as set forth in the table below to be categorized as well capitalized. At June 30, 2018 and December 31, 2017, 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 June 30 2018, that the Company and the Bank met all capital adequacy requirements. The following table compares the Bank’s actual capital amounts and ratios at June 30, 2018 and December 31, 2017 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 June 30, 2018 Total risk-based capital (to risk-weighted assets) $ 143,480 15.57 % $ 73,699 8.00 % $ 91,018 9.88 % $ 92,124 10.00 % Tier 1 risk-based capital (to risk-weighted assets) $ 131,961 14.32 % $ 55,274 6.00 % $ 72,594 7.88 % $ 73,699 8.00 % Tier 1 leverage capital (to average assets) $ 131,961 12.23 % $ 43,157 4.00 % N/A N/A $ 53,946 5.00 % CET 1 capital (to risk-weighted assets) $ 131,961 14.32 % $ 41,456 4.50 % $ 64,487 7.00 % $ 59,881 6.50 % At December 31, 2017 Total risk-based capital (to risk-weighted assets) $ 133,967 16.25 % $ 65,965 8.00 % $ 76,272 9.25 % $ 82,456 10.00 % Tier 1 risk-based capital (to risk-weighted assets) $ 123,651 15.00 % $ 49,474 6.00 % $ 59,781 7.25 % $ 65,965 8.00 % Tier 1 leverage capital (to average assets) $ 123,651 12.61 % $ 39,233 4.00 % N/A N/A $ 49,041 5.00 % CET 1 capital (to risk-weighted assets) $ 123,651 15.00 % $ 37,105 4.50 % $ 47,412 5.75 % $ 53,597 6.50 % In addition to the minimum CET 1, Tier 1, total capital, and leverage ratios, the Bank now has to maintain a capital conservation buffer consisting of additional CET 1 capital above the required minimum levels in order to avoid limitations on paying dividends, engaging in share repurchases, and paying discretionary bonuses based on percentages of eligible retained income that could be utilized for such actions. The capital conservation buffer requirement was phased-in on January 1, 2016 when more than 0.625% of risk-weighted assets was required and increases by 0.625% on each subsequent January 1, until fully implemented to an amount more than 2.5% of risk-weighted assets in January 2019. At June 30, 2018, the Bank’s CET1 capital exceeded the required capital conservation buffer of an amount more than 1.875%. FS Bancorp, Inc. is a bank holding company subject to the capital adequacy requirements of the Federal Reserve under the Bank Holding Company Act of 1956, as amended, and the regulations of the Federal Reserve. For a bank holding company with less than $1.0 billion in assets (as of June 30 th of the preceding year), the capital guidelines apply on a bank only basis and the Federal Reserve expects the holding company’s subsidiary bank to be well capitalized under the prompt corrective action regulations. At June 30, 2018, FS Bancorp, Inc. was subject to regulatory guidelines for bank holding companies with $1.0 billion or more in assets and exceeded all regulatory capital requirements. The regulatory capital ratios calculated for FS Bancorp, Inc. at June 30, 2018 were 11.9% for Tier 1 leverage-based capital, 13.9% for Tier 1 risk-based capital, 15.2% for total risk-based capital, and 13.9% for CET 1 capital ratio.

Business Segments

Business Segments	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Business Segments	NOTE 13 - 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. We define our business segments by product type and customer segment which we have organized into two lines of business: commercial and consumer banking and home lending. We use 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. We originate consumer loans, commercial and multi-family real estate loans, residential and multi-family construction loans, and commercial business loans. At June 30, 2018, our retail deposit branch network consisted of 13 branches in the Pacific Northwest. At June 30, 2018 and December 31, 2017, our deposits totaled $870.1 million and $829.8 million, respectively. This segment is also responsible for the management of our 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 our mortgage loans are sold to or securitized by FNMA, FHLMC, GNMA, or FHLB, while we retain 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. We have the option to sell loans on a servicing-released or servicing-retained basis to securitizers and correspondent lenders. A small percentage of our loans are brokered to other lenders. On occasion, we may sell a portion of our MSR portfolio and we may sell small pools of loans originated for the portfolio. We manage 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 three and six months ended June 30, 2018 and 2017: At or For the Three Months Ended June 30, 2018 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 764 $ 11,161 $ 11,925 Provision for loan losses (149) (301) (450) Noninterest income 4,447 1,167 5,614 Noninterest expense (4,508) (7,636) (12,144) Income before provision for income taxes 554 4,391 4,945 Provision for income taxes (78) (610) (688) Net income $ 476 $ 3,781 $ 4,257 Total average assets at period end $ 222,687 $ 860,175 $ 1,082,862 FTEs 117 219 336 At or For the Three Months Ended June 30, 2017 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 415 $ 9,551 $ 9,966 Provision for loan losses (117) 117 — Noninterest income 5,462 1,495 6,957 Noninterest expense (4,382) (6,562) (10,944) Income before provision for income taxes 1,378 4,601 5,979 Provision for income taxes (374) (1,246) (1,620) Net income $ 1,004 $ 3,355 $ 4,359 Total average assets at period end $ 197,431 $ 705,052 $ 902,483 FTEs 117 207 324 At or For the Six Months Ended June 30, 2018 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 1,479 $ 21,943 $ 23,422 Provision for loan losses (145) (655) (800) Noninterest income 8,213 2,425 10,638 Noninterest expense (8,564) (14,615) (23,179) Income before provision for income taxes 983 9,098 10,081 Provision for income taxes (146) (1,356) (1,502) Net income $ 837 $ 7,742 $ 8,579 Total average assets at quarter end $ 219,553 $ 830,419 $ 1,049,972 FTEs 117 219 336 At or For the Six Months Ended June 30, 2017 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 1,045 $ 17,896 $ 18,941 Provision for loan losses (197) 197 — Noninterest income 9,849 2,528 12,377 Noninterest expense (8,399) (12,922) (21,321) Income before provision for income taxes 2,298 7,699 9,997 Provision for income taxes (700) (2,345) (3,045) Net income $ 1,598 $ 5,354 $ 6,952 Total average assets at period end $ 184,499 $ 686,294 $ 870,793 FTEs 117 207 324 (1) Net interest income is the difference between interest earned on assets and the cost of liabilities to fund those assets. Interest earned includes actual interest earned on segment assets and, if the segment has excess liabilities, interest credits for providing funding to the other segment. The cost of liabilities includes interest expense on segment liabilities and, if the segment does not have enough liabilities to fund its assets, a funding charge based on the cost of assigned liabilities to fund segment assets.

Goodwill And Other Intangible A

Goodwill And Other Intangible Assets	6 Months Ended
	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	NOTE 14 - GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and certain other intangibles generally arise from business combinations accounted for under the purchase method of accounting. Goodwill totaled $2.3 million at June 30, 2018 and December 31, 2017, 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. 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, 2017, and determined that no impairment of goodwill existed. No events or circumstances since the December 31, 2017 annual impairment test were noted that would indicate it was more likely than not a goodwill impairment existed at June 30, 2018. The following table summarizes the changes in the Company’s other intangible assets for the year ended December 31, 2017, and the six months ended June 30, 2018. Other Intangible Assets Accumulated Gross Amortization Net Balance, December 31, 2016 $ 2,239 $ (522) $ 1,717 Amortization — (400) (400) Balance, December 31, 2017 2,239 (922) 1,317 Amortization — (153) (153) Balance, June 30, 2018 $ 2,239 $ (1,075) $ 1,164 The core deposit intangible represents the fair value of the acquired core deposit base. The core deposit intangible will be amortized on an accelerated basis over approximately nine years. Total amortization expense was $77,000 and $153,000 for the three and six months ended June 30, 2018, and $100,000 and $200,000 for the same period in 2017. Amortization expense for core deposit intangible is expected to be as follows at June 30, 2018: Remainder of 2018 $ 154 2019 235 2020 181 2021 166 2022 166 Thereafter 262 Total $ 1,164

Revenue From Contracts With Cus

Revenue From Contracts With Customers	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	NOTE 15 - REVENUE FROM CONTRACTS WITH CUSTOMERS As noted in Note 1, the Company adopted the provisions of ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), on January 1, 2018 and all subsequent ASUs that modified Topic 606. Results for reporting periods beginning after December 31, 2017 are presented under Topic 606, while prior period amounts have not been adjusted and continue to be reported in accordance with Topic 605. 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. For the three months ended June 30, 2018, the Company recognized $574,000 in total deposit fees, which included $280,000 of debit card interchange fees and $116,000 of fees from non-sufficient funds, both considered within the scope of ASC 606, and $5.2 million of noninterest income considered not within the scope of ASC 606. For the six months ended June 30, 2018, the Company recognized $1.1 million in total deposit fees, which included $540,000 of debit card interchange fees and $236,000 of fees from non-sufficient funds, both considered within the scope of ASC 606, and $9.9 million of noninterest income considered not within the scope of ASC 606. Deposit Fees The Bank earns fees from its deposit customers for account maintenance, transaction-based and overdraft services. 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 non-sufficient funds fees, overdraft fees, and wire fees. 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. Certain expenses directly associated with the debit card are recorded on a net basis with the interchange income.

Definitive Agreement

Definitive Agreement	6 Months Ended
	Jun. 30, 2018
Business Combination [Abstract]
Business Combination Disclosure [Text Block]	NOTE 16 - DEFINITIVE AGREEMENT On July 17, 2018, the Company entered into a definitive agreement (the "Agreement") with Anchor Bancorp, headquartered in Lacey, Washington ("Anchor"), pursuant to which Anchor will be merged with and into the Company, and immediately thereafter Anchor’s bank subsidiary, Anchor Bank, will be merged with and into 1st Security Bank of Washington (the "Anchor Merger"). Anchor Bank has nine full-service banking offices within Grays Harbor, Thurston, Lewis, and Pierce counties, and one loan production office located in King County, Washington. Under the terms of the Agreement, Anchor shareholders will receive 0.2921 shares of FS Bancorp common stock and $12.40 in cash for each share of Anchor common stock. FS Bancorp will pay aggregate consideration of 725,585 shares of FS Bancorp common stock and $30.8 million in cash, or based on the 10-day volume weighted average closing price of FS Bancorp common stock of $63.68 on July 13, 2018, approximately $77.0 million in aggregate, including the value of outstanding shares of Anchor restricted stock. In the event the Agreement is terminated under certain specified circumstances in connection with a competing transaction, Anchor will be required to pay the Company a termination fee of $2.7 million in cash. All of the directors of Anchor have agreed to vote their shares of Anchor common stock in favor of approval of the Agreement. The proposed transaction is subject to customary closing conditions, including the receipt of regulatory approvals and approval of the Agreement by the shareholders of Anchor, and is expected to be completed in either the fourth quarter of 2018 or early in the first quarter of 2019. At June 30, 2018, Anchor reported total assets of $469.6 million, total loans of $397.4 million and total deposits of $359.0 million. Upon consummation of the merger, the shareholders of Anchor will own approximately 16% of the combined company.

Basis of Presentation and Sum25

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Financial Statement Presentation	Financial Statement Presentation - The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and in accordance with the instructions to Form 10‑Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (“SEC”). It is recommended that these unaudited interim consolidated financial statements be read in conjunction with the Company’s Annual Report on Form 10‑K with all of the audited information and footnotes required by U.S. GAAP for complete financial statements for the year ended December 31, 2017, as filed with the SEC on March 16, 2018. In the opinion of management, all normal adjustments and recurring accruals considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. The results for the three and six months ended June 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018, or any other future period. The preparation of financial statements, in conformity with U.S. GAAP, requires management to make estimates and assumptions that affect amounts reported in the financial statements. Actual results could differ from these estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan and lease losses, fair value of financial instruments, the valuation of servicing rights, and the deferred income taxes. Amounts presented in the consolidated financial statements and footnote tables are rounded and presented in thousands of dollars except per share amounts. In the narrative footnote discussion, amounts are rounded and presented in millions of dollars to one decimal point if the amounts are above $1.0 million. Amounts below $1.0 million are rounded and presented in dollars to the nearest thousands. Certain prior year amounts have been reclassified to conform to the 2018 presentation with no change to consolidated net income or stockholders’ equity previously reported.
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, Policy	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 13 - Business Segments”.
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. 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 located in the states we originate consumer loans. Other Consumer. Loans originated by the Company, including automobiles, recreational vehicles, direct home improvement loans, loans on deposits, and other consumer loans, primarily consisting of personal lines of credit. 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 our standard 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 principles 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.
Nonaccrual and Past Due Loans	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.
Credit Quality Indicators	The Company utilizes a risk grading matrix to assign a risk grade to its real estate and commercial business loans. Loans are graded on a scale of 1 to 10, with loans in risk grades 1 to 6 considered “Pass” and loans in risk grades 7 to 10 are reported as classified loans in the Company’s allowance for loan loss analysis. A description of the 10 risk grades is as follows:  Grades 1 and 2 - These grades include loans to very high quality borrowers with excellent or desirable business credit.  Grade 3 - This grade includes loans to borrowers of good business credit with moderate risk.  Grades 4 and 5 - These grades include “Pass” grade loans to borrowers of average credit quality and risk.  Grade 6 - This grade includes loans on management’s “Watch” list and is intended to be utilized on a temporary basis for “Pass” grade borrowers where frequent and thorough monitoring is required due to credit weaknesses and where significant risk-modifying action is anticipated in the near term.  Grade 7 - This grade is for “Other Assets Especially Mentioned” (“OAEM”) in accordance with regulatory guidelines and includes borrowers where performance is poor or significantly less than expected.  Grade 8 - This grade includes “Substandard” loans in accordance with regulatory guidelines which represent an unacceptable business credit where a loss is possible if loan weakness is not corrected.  Grade 9 - This grade includes “Doubtful” loans in accordance with regulatory guidelines where a loss is highly probable.  Grade 10 - This grade includes “Loss” loans in accordance with regulatory guidelines for which total loss is expected and when identified are charged off. Consumer, Home Equity, and One-to-Four-Family Real Estate Loans Homogeneous loans are risk rated based upon the Federal Financial Institutions Examination Council’s Uniform Retail Credit Classification and Account Management Policy. Loans classified under this policy at the Company are consumer loans which include indirect home improvement, solar, marine, other consumer, and one-to-four-family first and second liens. Under the Uniform Retail Credit Classification Policy, loans that are current or less than 90 days past due are graded “Pass” and risk rated “4” or “5” internally. Loans that are past due more than 90 days are classified “Substandard” and risk rated “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.
Derivatives	The Company regularly enters into commitments to originate and sell loans held for sale. The Company has established a hedging strategy to protect itself against the risk of loss associated with interest rate movements on loan commitments. The Company enters into contracts to sell forward To-Be-Announced (“TBA”) mortgage-backed securities. These commitments and contracts are considered derivatives but have not been designated as hedging instruments for reporting purposes under U.S. GAAP. Rather, they are accounted for as free-standing derivatives, or economic hedges, with changes in the fair value of the derivatives reported in noninterest income. 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.
Loan Commitments	The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments.
Determination of Fair Market Values	Determination of Fair Market Values at December 31, 2017: 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. 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 (Level 2). 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 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).
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. 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 June 30, 2018 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.
Federal Reserve Bank Reserve Requirements	Federal Reserve regulations require that the Bank maintain reserves in the form of cash on hand and deposit balances with the Federal Reserve Bank based on a percentage of deposits. The amounts of such balances at June 30, 2018 and December 31, 2017 were $17.9 million and $18.2 million, respectively.
Earnings Per Share	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. Diluted earnings per share reflect the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity. For earnings per share calculations, the ESOP shares committed to be released are included as outstanding shares for both basic and diluted earnings per share.
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTS In February 2016, the Financial Accounting Standards Board (“FASB”) issued 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 a right-of-use 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 a finance lease, interest payments should be recognized separately from amortization of the right-of-use asset in the statement of comprehensive income. For operating leases, the lease cost should be allocated over the lease term on a generally straight-line basis. The amendments in ASU 2016‑02 are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application of the amendments in the ASU is permitted. Once adopted, we expect to report higher assets and liabilities as a result of including right-of-use assets and lease liabilities related to certain banking offices and certain equipment under noncancelable operating lease agreements. As of December 31, 2017, we would have reported an increase of approximately $4. 7 million in both assets and liabilities in the Consolidated Balance Sheets based on management’s estimate assuming the early adoption of this ASU. In June 2016, the FASB issued ASU No. 2016‑13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. 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 measurement of all expected credit losses 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 expected credit losses. 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 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early application will be permitted for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating the impact of this ASU on the Company’s consolidated financial statements. Once adopted, we anticipate our allowance for loan losses to increase through a one‑time adjustment to retained earnings, however, until our evaluation is complete the magnitude of the increase will be unknown. In March 2017, the FASB issued ASU No. 2017‑08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310‑20): Premium Amortization on Purchased Callable Debt Securities . The ASU shortens the amortization period for certain callable debt securities held at a premium. The ASU will take effect for SEC filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The adoption of ASU No. 2017‑08 is not expected to have a material impact on the Company’s consolidated financial statements. In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities . This ASU amends the hedge accounting recognition and presentation requirements in ASC 815 to (1) improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities and (2) reduce the complexity of and simplify the application of hedge accounting by preparers. The amendments in this ASU permit hedge accounting for hedging relationships involving nonfinancial risk and interest rate risk by removing certain limitations in cash flow and fair value hedging relationships. In addition, the ASU requires an entity to present the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedged item is reported. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2018 and early adoption is permitted. The adoption of ASU No. 2017-12 is not expected to have a material impact on the Company's consolidated financial statements. In March 2018, the FASB issued ASU No. 2018-05, Income Taxes (Topic 740) . This ASU was issued to provide guidance on the income tax accounting implications of the Tax Cuts and Jobs Act (“Tax Act”) and allows for entities to report provisional amounts for specific income tax effects of the Act for which the accounting under Topic 740 was not yet complete but a reasonable estimate could be determined. A measurement period of one year is allowed to complete the accounting effects under Topic 740 and revise any previous estimates reported. Any provisional amounts or subsequent adjustments included in an entity’s financial statements during the measurement period should be included in income from continuing operations as an adjustment to tax expense in the reporting period the amounts are determined. The Company adopted this ASU with the provisional adjustments as reported in the Consolidated Financial Statements on Form 10-K as of December 31, 2017. As of June 30, 2018, the Company did not incur any adjustments to the provisional recognition. In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718) : Improvements to Nonemployee Share-Based Payment Accounting. This ASU was issued to expand the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. Previously, these awards were recorded at the fair value of consideration received or the fair value of the equity instruments issued and was measured as the earlier of the commitment date or date performance was completed. The amendments in this ASU require the awards to be measured at the grant-date fair value of the equity instrument. ASU No. 2018-07 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, but no earlier than an entity's adoption of Topic 606. The adoption of ASU No. 2018-07 is not expected to have a material impact on the Company's future consolidated financial statements.
Application of New Accounting Guidance	Application of New Accounting Guidance Adopted in 2018 On January 1, 2018, the Company adopted FASB issued ASU No. 2014‑09, Revenue from Contracts with Customers and all subsequent amendments to the ASU (collectively “ASC 606”) , which created Topic 606 and supersedes Topic 605, Revenue Recognition. In August 2015, FASB issued ASU No. 2015‑14, Revenue from Contracts with Customers (Topic 606) , which postponed the effective date of 2014‑09. The core principle of Topic 606 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In general, the new guidance requires companies to use more judgment and make more estimates than under past guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. For financial reporting purposes, the Company utilized the modified retrospective approach, meaning the ASU is applied only to the most current period presented in the financial statements with the cumulative effect of initially applying the standard recognized at the date of initial application. As a bank holding company, key revenue sources, such as interest income on loans, investment securities and deposits, as well as other sources of income including loan fees, security sales, and derivatives have been identified as out of the scope of this new guidance. Management conducted an assessment of the revenue streams that were affected by the new guidance and identified those considered material and in scope to ensure compliance with the new guidance concluding those related to credit and debit card fees, and service charges and fees on deposit accounts. No additional changes to processes or procedures were identified for the recognition of revenues in scope. The adoption of this ASU did not have a material impact on the Company’s consolidated financial statements. However, additional disclosures required by the ASU have been included in “Note 15 - Revenue from Contracts with Customers” to the Company’s consolidated financial statements. On January 1, 2018, the FASB issued ASU No. 2016‑01, Financial Instruments - Overall (Subtopic 825‑10): Recognition and Measurement of Financial Assets and Financial Liabilities. The new guidance improves the recognition and measurement of financial instruments. This ASU requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes and requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements. Exit price is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. This ASU also eliminates the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The adoption of ASU No. 2016-01 did not have a material impact on the Company’s consolidated financial statements. The disclosures to the Company’s consolidated financial statements have been updated appropriately using the exit price notion in “Note 8 – Fair Value of Financial Instruments”. In May 2018, the FASB issued ASU No. 2018-06, Codification Improvements to Topic 942, Financial Services - Depository and Lending. This ASU updates outdated guidance related to the Office of Comptroller of the Currency’s (OCC) Banking Circular 202, Accounting for Net Deferred Tax Charges, as the guidance has been rescinded by OCC and is no longer relevant. The amendments in this ASU are effective immediately. The adoption of ASU No. 2018-06 is not expected to have a material impact on the Company's consolidated financial statements.

Securities Available-for-sale (

Securities Available-for-sale (Tables)	6 Months Ended
	Jun. 30, 2018
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 June 30, 2018 and December 31, 2017: June 30, 2018 Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Values SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 16,064 $ 23 $ (165) $ 15,922 Corporate securities 7,092 6 (203) 6,895 Municipal bonds 10,871 — (389) 10,482 Mortgage-backed securities 50,570 24 (1,531) 49,063 U.S. Small Business Administration securities 16,578 — (475) 16,103 Total securities available-for-sale $ 101,175 $ 53 $ (2,763) $ 98,465 December 31, 2017 Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Values SECURITIES AVAILABLE-FOR-SALE U.S. agency securities $ 9,077 $ 49 $ (11) $ 9,115 Corporate securities 7,113 9 (96) 7,026 Municipal bonds 12,720 148 (82) 12,786 Mortgage-backed securities 40,161 63 (490) 39,734 U.S. Small Business Administration securities 14,014 — (195) 13,819 Total securities available-for-sale $ 83,085 $ 269 $ (874) $ 82,480
Schedule of Unrealized Loss on Investments	Investment securities that were in an unrealized loss position at June 30, 2018 and December 31, 2017 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. June 30, 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 $ 11,898 $ (165) $ — $ — $ 11,898 $ (165) Corporate securities 4,009 (87) 1,880 (116) 5,889 (203) Municipal bonds 8,659 (212) 1,823 (177) 10,482 (389) Mortgage-backed securities 27,807 (671) 17,532 (860) 45,339 (1,531) U.S. Small Business Administration securities 12,999 (358) 3,105 (117) 16,104 (475) Total $ 65,372 $ (1,493) $ 24,340 $ (1,270) $ 89,712 $ (2,763) December 31, 2017 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 $ 2,987 $ (11) $ — $ — $ 2,987 $ (11) Corporate securities 4,102 (15) 1,915 (81) 6,017 (96) Municipal bonds 5,982 (82) — — 5,982 (82) Mortgage-backed securities 7,262 (61) 20,635 (429) 27,897 (490) U.S. Small Business Administration securities 11,876 (162) 1,943 (33) 13,819 (195) Total $ 32,209 $ (331) $ 24,493 $ (543) $ 56,702 $ (874)
Schedule of Available for Sale Securities by Contractual Maturity	The contractual maturities of securities available-for-sale at June 30, 2018 and December 31, 2017 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. June 30, 2018 December 31, 2017 Amortized Fair Amortized Fair Cost Value Cost Value U.S. agency securities Due after five years through ten years $ 11,066 $ 10,994 $ 4,079 $ 4,124 Due after ten years 4,998 4,928 4,998 4,991 Subtotal 16,064 15,922 9,077 9,115 Corporate securities Due after one year through five years 6,096 5,990 5,117 5,111 Due after five years through ten years 996 905 1,996 1,915 Subtotal 7,092 6,895 7,113 7,026 Municipal bonds Due after one year through five years 2,659 2,589 2,001 2,026 Due after five years through ten years 1,150 1,130 4,111 4,206 Due after ten years 7,062 6,763 6,608 6,554 Subtotal 10,871 10,482 12,720 12,786 Mortgage-backed securities Federal National Mortgage Association (“FNMA”) 33,586 32,675 23,310 23,091 Federal Home Loan Mortgage Corporation (“FHLMC”) 11,185 10,757 10,818 10,629 Government National Mortgage Association (“GNMA”) 5,799 5,631 6,033 6,014 Subtotal 50,570 49,063 40,161 39,734 U.S. Small Business Administration securities Due after five years through ten years 14,672 14,263 12,065 11,896 Due after ten years 1,906 1,840 1,949 1,923 Subtotal 16,578 16,103 14,014 13,819 Total $ 101,175 $ 98,465 $ 83,085 $ 82,480
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 three and six months ended June 30, 2018 and 2017 were as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2018 Gross Gross Gross Gross Proceeds Gains (Losses) Proceeds Gains (Losses) Securities available-for-sale $ — $ — $ — $ 5,305 $ 113 $ — Three Months Ended Six Months Ended June 30, 2017 June 30, 2017 Gross Gross Gross Gross Proceeds Gains (Losses) Proceeds Gains (Losses) Securities available-for-sale $ $ $ — $ 29,988 $ 237 $ —

Loans Receivable and Allowanc27

Loans Receivable and Allowance For Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	The composition of the loan portfolio was as follows at June 30, 2018 and December 31, 2017: June 30, December 31, 2018 2017 REAL ESTATE LOANS Commercial $ 64,599 $ 63,611 Construction and development 160,521 143,068 Home equity 25,460 25,289 One-to-four-family (excludes loans held for sale) 177,988 163,655 Multi-family 47,695 44,451 Total real estate loans 476,263 440,074 CONSUMER LOANS Indirect home improvement 147,067 130,176 Solar 42,189 41,049 Marine 48,591 35,397 Other consumer 2,027 2,046 Total consumer loans 239,874 208,668 COMMERCIAL BUSINESS LOANS Commercial and industrial 110,962 83,306 Warehouse lending 66,681 41,397 Total commercial business loans 177,643 124,703 Total loans receivable, gross 893,780 773,445 Allowance for loan losses (11,571) (10,756) Deferred costs and fees, net (2,885) (2,708) Premiums on purchased loans 1,876 1,577 Total loans receivable, net $ 881,200 $ 761,558
Allowance for Credit Losses on Financing Receivables	The following tables detail activity in the allowance for loan losses by loan categories at or for the three and six months ended June 30, 2018 and 2017: At or For the Three Months Ended June 30, 2018 Commercial Real Estate Consumer Business Unallocated Total ALLOWANCE FOR LOAN LOSSES Beginning balance $ 4,780 $ 2,934 $ 2,311 $ 1,115 $ 11,140 Provision for loan losses 330 285 255 (420) 450 Charge-offs (1) (223) — — (224) Recoveries 16 188 1 — 205 Net recoveries (charge-offs) 15 (35) 1 — (19) Ending balance $ 5,125 $ 3,184 $ 2,567 $ 695 $ 11,571 Period end amount allocated to: Loans individually evaluated for impairment $ 21 $ 109 $ — $ — $ 130 Loans collectively evaluated for impairment 5,104 3,075 2,567 695 11,441 Ending balance $ 5,125 $ 3,184 $ 2,567 $ 695 $ 11,571 LOANS RECEIVABLE Loans individually evaluated for impairment $ 317 $ 310 $ — $ — $ 627 Loans collectively evaluated for impairment 475,946 239,564 177,643 — 893,153 Ending balance $ 476,263 $ 239,874 $ 177,643 $ — $ 893,780 At or For the Six Months Ended June 30, 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 for loan losses 343 370 550 (463) 800 Charge-offs (4) (451) — — (455) Recoveries 16 451 3 — 470 Net recoveries 12 — 3 — 15 Ending balance $ 5,125 $ 3,184 $ 2,567 $ 695 $ 11,571 Period end amount allocated to: Loans individually evaluated for impairment $ 21 $ 109 $ — $ — $ 130 Loans collectively evaluated for impairment 5,104 3,075 2,567 695 11,441 Ending balance $ 5,125 $ 3,184 $ 2,567 $ 695 $ 11,571 LOANS RECEIVABLE Loans individually evaluated for impairment $ 317 $ 310 $ — $ — $ 627 Loans collectively evaluated for impairment 475,946 239,564 177,643 — 893,153 Ending balance $ 476,263 $ 239,874 $ 177,643 $ — $ 893,780 At or For the Three Months Ended June 30, 2017 Commercial Real Estate Consumer Business Unallocated Total ALLOWANCE FOR LOAN LOSSES Beginning balance $ 3,813 $ 2,588 $ 2,169 $ 1,577 $ 10,147 Provision for loan losses 331 87 282 (700) — Charge-offs — (179) — — (179) Recoveries — 173 2 — 175 Net (charge-offs) recoveries — (6) 2 — (4) Ending balance $ 4,144 $ 2,669 $ 2,453 $ 877 $ 10,143 Period end amount allocated to: Loans individually evaluated for impairment $ — $ — $ — $ — $ — Loans collectively evaluated for impairment 4,144 2,669 2,453 877 10,143 Ending balance $ 4,144 $ 2,669 $ 2,453 $ 877 $ 10,143 LOANS RECEIVABLE Loans individually evaluated for impairment $ 439 $ — $ — $ — $ 439 Loans collectively evaluated for impairment 397,256 190,729 131,878 — 719,863 Ending balance $ 397,695 $ 190,729 $ 131,878 $ — $ 720,302 At or For the Six Months Ended June 30, 2017 Commercial Real Estate Consumer Business Unallocated Total ALLOWANCE FOR LOAN LOSSES Beginning balance $ 3,547 $ 2,082 $ 2,675 $ 1,907 $ 10,211 Provision for loan losses 596 661 (227) (1,030) — Charge-offs — (384) — — (384) Recoveries 1 310 5 — 316 Net recoveries (charge-offs) 1 (74) 5 — (68) Ending balance $ 4,144 $ 2,669 $ 2,453 $ 877 $ 10,143 Period end amount allocated to: Loans individually evaluated for impairment $ — $ — $ — $ — $ — Loans collectively evaluated for impairment 4,144 2,669 2,453 877 10,143 Ending balance $ 4,144 $ 2,669 $ 2,453 $ 877 $ 10,143 LOANS RECEIVABLE Loans individually evaluated for impairment $ 439 $ — $ — $ — $ 439 Loans collectively evaluated for impairment 397,256 190,729 131,878 — 719,863 Ending balance $ 397,695 $ 190,729 $ 131,878 $ — $ 720,302
Past Due Financing Receivables	The following tables provide information pertaining to the aging analysis of contractually past due loans and non-accrual loans at June 30, 2018 and December 31, 2017: June 30, 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 $ — $ — $ — $ — $ 64,599 $ 64,599 $ — Construction and development — — — — 160,521 160,521 — Home equity — — 72 72 25,388 25,460 176 One-to-four-family — 141 — 141 177,847 177,988 141 Multi-family — — — — 47,695 47,695 — Total real estate loans — 141 72 213 476,050 476,263 317 CONSUMER LOANS Indirect home improvement 360 127 114 601 146,466 147,067 274 Solar 24 44 16 84 42,105 42,189 35 Marine 16 — — 16 48,575 48,591 — Other consumer 11 1 — 12 2,015 2,027 1 Total consumer loans 411 172 130 713 239,161 239,874 310 COMMERCIAL BUSINESS LOANS Commercial and industrial — — — — 110,962 110,962 — Warehouse lending — — — — 66,681 66,681 — Total commercial business loans — — — — 177,643 177,643 — Total loans $ 411 $ 313 $ 202 $ 926 $ 892,854 $ 893,780 $ 627 December 31, 2017 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 $ — $ — $ — $ — $ 63,611 $ 63,611 $ — Construction and development — — — — 143,068 143,068 — Home equity 122 — 136 258 25,031 25,289 151 One-to-four-family 142 — — 142 163,513 163,655 142 Multi-family — — — — 44,451 44,451 — Total real estate loans 264 — 136 400 439,674 440,074 293 CONSUMER LOANS Indirect home improvement 255 215 99 569 129,607 130,176 195 Solar 49 19 — 68 40,981 41,049 — Marine — — — — 35,397 35,397 — Other consumer — — — — 2,046 2,046 — Total consumer loans 304 234 99 637 208,031 208,668 195 COMMERCIAL BUSINESS LOANS Commercial and industrial — 551 — 551 82,755 83,306 551 Warehouse lending — — — — 41,397 41,397 — Total commercial business loans — 551 — 551 124,152 124,703 551 Total loans $ 568 $ 785 $ 235 $ 1,588 $ 771,857 $ 773,445 $ 1,039 There were no loans 90 days or more past due and still accruing interest at June 30, 2018 and December 31, 2017.
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 credit losses has been provided and loans for which no allowance was provided at June 30, 2018 and December 31, 2017: June 30, 2018 Unpaid Principal Recorded Related Balance Impairment Investment Allowance WITH NO RELATED ALLOWANCE RECORDED Home equity $ 176 $ — $ 176 $ — WITH RELATED ALLOWANCE RECORDED One-to-four-family 141 — 141 21 Consumer loans 310 — 310 109 451 — 451 130 Total $ 627 $ — $ 627 $ 130 December 31, 2017 Unpaid Principal Recorded Related Balance Impairment Investment Allowance WITH NO RELATED ALLOWANCE RECORDED Home equity $ 151 $ — $ 151 $ — One-to-four-family 67 (12) 55 — Total real estate loans 218 (12) 206 — Commercial business loans 551 — 551 — 769 (12) 757 — WITH RELATED ALLOWANCE RECORDED One-to-four-family 142 — 142 21 Consumer loans 195 — 195 68 337 — 337 89 Total $ 1,106 $ (12) $ 1,094 $ 89 The following table presents the average recorded investment in loans individually evaluated for impairment and the interest income recognized and received for the three and six months ended June 30, 2018 and 2017: At or For the Three Months Ended June 30, 2018 June 30, 2017 Average Recorded Interest Income Average Recorded Interest Income Investment Recognized Investment Recognized WITH NO RELATED ALLOWANCE RECORDED Home equity $ 148 $ 1 $ 240 $ — One-to-four-family (1) — — 201 1 Total real estate loans 148 1 441 1 WITH RELATED ALLOWANCE RECORDED One-to-four-family 271 1 — — Consumer loans 292 6 — — 563 7 — — Total $ 711 $ 8 $ 441 $ 1 ________________________ (1) Includes loans supported by Federal Housing Administration (“FHA”) guarantees. At or For the Six Months Ended June 30, 2018 June 30, 2017 Average Recorded Interest Income Average Recorded Interest Income Investment Recognized Investment Recognized WITH NO RELATED ALLOWANCE RECORDED Home equity $ 182 $ 3 $ 230 $ — One-to-four-family (1) — — 178 4 Total real estate loans 182 3 408 4 WITH AN ALLOWANCE RECORDED One-to-four-family 271 3 — — Consumer loans 276 11 — — 547 14 — — Total $ 729 $ 17 $ 408 $ 4 _______________________ (1) Includes loans supported by FHA guarantees.
Financing Receivable Credit Quality Indicators	The following tables summarize risk rated loan balances by category at the dates indicated: June 30, 2018 Special Pass Watch Mention Substandard Doubtful Loss (1 - 5) (6) (7) (8) (9) (10) Total REAL ESTATE LOANS Commercial $ 64,599 $ — $ — $ — $ — $ — $ 64,599 Construction and development 160,521 — — — — — 160,521 Home equity 25,284 — — 176 — — 25,460 One-to-four-family 177,847 — — 141 — — 177,988 Multi-family 47,695 — — — — — 47,695 Total real estate loans 475,946 — — 317 — — 476,263 CONSUMER LOANS Indirect home improvement 146,793 — — 274 — — 147,067 Solar 42,154 — — 35 — — 42,189 Marine 48,591 — — — — — 48,591 Other consumer 2,026 — — 1 — — 2,027 Total consumer loans 239,564 — — 310 — — 239,874 COMMERCIAL BUSINESS LOANS Commercial and industrial 103,262 2,228 338 5,134 — — 110,962 Warehouse lending 66,681 — — — — — 66,681 Total commercial business loans 169,943 2,228 338 5,134 — — 177,643 Total loans receivable, gross $ 885,453 $ 2,228 $ 338 $ 5,761 $ — $ — $ 893,780 December 31, 2017 Special Pass Watch Mention Substandard Doubtful Loss (1 - 5) (6) (7) (8) (9) (10) Total REAL ESTATE LOANS Commercial $ 62,057 $ — $ 1,554 $ — $ — $ — $ 63,611 Construction and development 143,068 — — — — — 143,068 Home equity 25,138 — — 151 — — 25,289 One-to-four-family 163,513 — — 142 — — 163,655 Multi-family 44,451 — — — — — 44,451 Total real estate loans 438,227 — 1,554 293 — — 440,074 CONSUMER LOANS Indirect home improvement 129,981 — — 195 — — 130,176 Solar 41,049 — — — — — 41,049 Marine 35,397 — — — — — 35,397 Other consumer 1,998 — — 48 — — 2,046 Total consumer loans 208,425 — — 243 — — 208,668 COMMERCIAL BUSINESS LOANS Commercial and industrial 76,942 — 425 5,939 — — 83,306 Warehouse lending 40,724 673 — — — — 41,397 Total commercial business loans 117,666 673 425 5,939 — — 124,703 Total loans receivable, gross $ 764,318 $ 673 $ 1,979 $ 6,475 $ — $ — $ 773,445

Servicing Rights (Tables)

Servicing Rights (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Summary of servicing rights activity	The following table summarizes servicing rights activity for the three and six months ended June 30, 2018 and 2017: At or For the Three Months Ended June 30, 2018 2017 Beginning balance $ 7,515 $ 8,939 Additions 1,381 1,253 Sales — (4,751) Servicing rights amortized (544) (541) Impairment on servicing rights — (1) Ending balance $ 8,352 $ 4,899 At or For the Six Months Ended June 30, 2018 2017 Beginning balance $ 6,795 $ 8,459 Additions 2,519 2,242 Sales — (4,751) Servicing rights amortized (962) (1,050) Impairment on servicing rights — (1) Ending balance $ 8,352 $ 4,899
Valuation assumptions used in determining the fair value of servicing rights	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 June 30, 2018: Level 3 Significant Range Weighted Fair Value Instruments Valuation Technique Unobservable Inputs (Weighted Average) Average RECURRING Interest rate lock commitments with customers Quoted market prices Pull-through expectations 80% - 99% 94.8 % Individual forward sale commitments with investors Quoted market prices Pull-through expectations 80% - 99% 94.8 % NONRECURRING Impaired loans Fair value of underlying collateral Discount applied to the obtained appraisal 0% - 25% 20.7 %
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 June 30, 2018 and December 31, 2017 were as follows: June 30, 2018 December 31, 2017 Aggregate portfolio principal balance $ 952,257 $ 775,093 Weighted average rate of note 4.2 % % At June 30, 2018 Base 0.5%Adverse Rate Change 1.0%Adverse Rate Change Conditional prepayment rate 9.0 % 10.9 % 15.3 % Fair value MSR $ 12,016 $ 10,752 $ 9,162 Percentage of MSR 1.3 % 1.1 % 1.0 % Discount rate 9.8 % 10.3 % 10.8 % Fair value MSR $ 12,016 $ 11,754 $ 11,503 Percentage of MSR 1.3 % 1.2 % 1.2 % At December 31, 2017 Base 0.5%Adverse Rate Change 1.0%Adverse Rate Change Conditional prepayment rate 10.9 % 17.7 % 24.5 % Fair value MSR $ 8,602 $ 6,811 $ 5,614 Percentage of MSR 1.1 % 0.9 % 0.7 % Discount rate 9.6 % 10.1 % 10.6 % Fair value MSR $ 8,602 $ 8,433 $ 8,271 Percentage of MSR 1.1 % 1.1 % 1.1 %
Mortgage servicing rights
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Valuation assumptions used in determining the fair value of servicing rights	The following provides valuation assumptions used in determining the fair value of mortgage servicing rights (“MSR”) at the dates indicated: At June 30, 2018 2017 Key assumptions: Weighted average discount rate 9.5 % 9.5 % Conditional prepayment rate (“CPR”) 9.0 % 10.3 % Weighted average life in years 8.0 7.1

Derivatives (Tables)

Derivatives (Tables)	6 Months Ended
	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following tables summarize the Company’s derivative instruments at the dates indicated: June 30, 2018 Fair Value Notional Asset Liability Fallout adjusted interest rate lock commitments with customers $ 49,621 $ 1,138 $ — Mandatory and best effort forward commitments with investors 24,739 — 18 Forward TBA mortgage-backed securities 70,000 — 199 TBA mortgage-backed securities forward sales paired off with investors 21,500 — 22 December 31, 2017 Fair Value Notional Asset Liability Fallout adjusted interest rate lock commitments with customers $ 31,951 $ 726 $ — Mandatory and best effort forward commitments with investors 12,505 51 — Forward TBA mortgage-backed securities 66,500 — 65 TBA mortgage-backed securities forward sales paired off with investors 36,500 53 —

Deposits (Tables)

Deposits (Tables)	6 Months Ended
	Jun. 30, 2018
Banking and Thrift [Abstract]
Schedule of Deposit Liabilities	June 30, December 31, 2018 (1) 2017 (1) Noninterest-bearing checking $ 172,848 $ 177,739 Interest-bearing checking 128,080 119,872 Savings 77,631 72,082 Money market (2) 210,742 228,742 Certificates of deposit less than $100,000 (3) 144,755 111,489 Certificates of deposit of $100,000 through $250,000 79,131 77,934 Certificates of deposit of $250,000 and over (4) 45,417 32,833 Escrow accounts related to mortgages serviced 11,509 9,151 Total $ 870,113 $ 829,842 (1) Includes $124.0 million of deposits at June 30, 2018 (that which is remaining from the purchase of four retail bank branches from Bank of America, National Association on January 22, 2016) and $134.6 million at December 31, 2017. (2) Includes $4.0 million of brokered deposits at June 30, 2018 and $6.5 million at December 31, 2017. (3) Includes $86.6 million and $59.3 million of brokered deposits at June 30, 2018 and December 31, 2017, respectively. (4) 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 June 30, 2018 for future periods ending are as follows: At June 30, 2018 Maturing in 2018 $ 89,416 Maturing in 2019 90,581 Maturing in 2020 46,314 Maturing in 2021 23,286 Maturing in 2022 17,779 Thereafter 1,927 Total $ 269,303
Schedule of Interest Expense by Deposit Category	Interest expense by deposit category for the three and six months ended June 30, 2018 and 2017 is as follows: Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Interest-bearing checking $ 63 $ 14 $ 130 $ 22 Savings and money market 393 312 712 581 Certificates of deposit 976 570 1,833 1,145 Total $ 1,432 $ 896 $ 2,675 $ 1,748

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Commitments to Extend Credit	The following table provides a summary of the Company’s commitments at June 30, 2018 and December 31, 2017: June 30, December 31, 2018 2017 COMMITMENTS TO EXTEND CREDIT REAL ESTATE LOANS Commercial $ 108 $ 107 Construction and development 79,038 73,321 One-to-four-family (includes locks for salable loans) 55,817 37,336 Home equity 35,750 32,889 Multi-family 616 438 Total real estate loans 171,329 144,091 CONSUMER LOANS 10,184 10,041 COMMERCIAL BUSINESS LOANS Commercial and industrial 53,995 52,452 Warehouse lending 44,019 78,303 Total commercial business loans 98,014 130,755 Total commitments to extend credit $ 279,527 $ 284,887

Fair Value of Financial Instr32

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Schedule Of Available For Sale Securities Measured At Fair Value On A Recurring Basis	The following tables present securities available-for-sale measured at fair value on a recurring basis at the dates indicated: Securities Available-for-Sale Level 1 Level 2 Level 3 Total At June 30, 2018 U.S. agency securities $ — $ 15,922 $ — $ 15,922 Corporate securities — 6,895 — 6,895 Municipal bonds — 10,482 — 10,482 Mortgage-backed securities — 49,063 — 49,063 U.S. Small Business Administration securities — 16,103 — 16,103 Total $ — $ 98,465 $ — $ 98,465 Securities Available-for-Sale Level 1 Level 2 Level 3 Total At December 31, 2017 U.S. agency securities $ — $ 9,115 $ — $ 9,115 Corporate securities — 7,026 — 7,026 Municipal bonds — 12,786 — 12,786 Mortgage-backed securities — 39,734 — 39,734 U.S. Small Business Administration securities — 13,819 — 13,819 Total $ — $ 82,480 $ — $ 82,480
Fair Value, Mortgage Loans Held for Sale	The following table presents mortgage loans held for sale measured at fair value on a recurring basis at the dates indicated: Mortgage Loans Held for Sale Level 1 Level 2 Level 3 Total June 30, 2018 $ — $ 55,191 $ — $ 55,191 December 31, 2017 $ — $ 53,463 $ — $ 53,463
Schedule of fair value of interest rate lock commitments	The following tables present the fair value of interest rate lock commitments with customers, individual forward sale commitments with investors, and paired off commitments with investors measured at their fair value on a recurring basis at the dates indicated: Interest Rate Lock Commitments with Customers Level 1 Level 2 Level 3 Total June 30, 2018 $ — $ — $ 1,138 $ 1,138 December 31, 2017 $ — $ — $ 726 $ 726
Schedule of forward sale commitments with investors	The following tables present the fair value of interest rate lock commitments with customers, individual forward sale commitments with investors, and paired off commitments with investors measured at their fair value on a recurring basis at the dates indicated: Individual Forward Sale Commitments with Investors Level 1 Level 2 Level 3 Total June 30, 2018 $ — $ (199) $ (18) $ (217) December 31, 2017 $ — $ (65) $ 51 $ (14)
Schedule of paired off commitments with investors	The following tables present the fair value of interest rate lock commitments with customers, individual forward sale commitments with investors, and paired off commitments with investors measured at their fair value on a recurring basis at the dates indicated: Paired Off Commitments with Investors Level 1 Level 2 Level 3 Total June 30, 2018 $ — $ (22) $ — $ (22) December 31, 2017 $ — $ 53 $ — $ 53
Schedule of impaired loans and other real estate owned	The following table presents impaired loans 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. Impaired Loans Level 1 Level 2 Level 3 Total June 30, 2018 $ — $ — $ 627 $ 627 December 31, 2017 $ — $ — $ 1,094 $ 1,094
Valuation assumptions used in determining the fair value of servicing rights	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 June 30, 2018: Level 3 Significant Range Weighted Fair Value Instruments Valuation Technique Unobservable Inputs (Weighted Average) Average RECURRING Interest rate lock commitments with customers Quoted market prices Pull-through expectations 80% - 99% 94.8 % Individual forward sale commitments with investors Quoted market prices Pull-through expectations 80% - 99% 94.8 % NONRECURRING Impaired loans Fair value of underlying collateral Discount applied to the obtained appraisal 0% - 25% 20.7 %
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 three and six months ended June 30, 2018 and 2017: Net change in fair value for gains/ Purchases (losses) relating to Beginning and Sales and Ending items held at end of Three Months Ended June 30, Balance Issuances Settlements Balance period 2018 Interest rate lock commitments with customers $ 815 $ 3,140 $ (2,817) $ 1,138 $ 323 Individual forward sale commitments with investors 4 84 (106) (18) (22) 2017 Interest rate lock commitments with customers $ 1,437 $ 4,067 $ (4,292) $ 1,212 $ (225) Individual forward sale commitments with investors (19) (107) 209 83 102 Net change in fair value for gains/ Purchases (losses) relating to Beginning and Sales and Ending items held at end of Six Months Ended June 30, Balance Issuances Settlements Balance year 2018 Interest rate lock commitments with customers $ 726 $ 5,575 $ (5,163) $ 1,138 $ 412 Individual forward sale commitments with investors 51 656 (725) (18) (69) 2017 Interest rate lock commitments with customers $ 818 $ 7,549 $ (7,155) $ 1,212 $ 394 Individual forward sale commitments with investors 177 (303) 209 83 (94)
Fair Value, by Balance Sheet Grouping	The following table provides estimated fair values of the Company’s financial instruments at June 30, 2018 and December 31, 2017, whether or not recognized at fair value in the Consolidated Balance Sheets: June 30, December 31, 2018 2017 Carrying Fair Carrying Fair Amount Value Amount Value Financial Assets Level 1 inputs: Cash and cash equivalents $ 21,977 $ 21,977 $ 18,915 $ 18,915 Certificates of deposit at other financial institutions 17,611 17,611 18,108 18,108 Level 2 inputs: Securities available-for-sale, at fair value 98,465 98,465 82,480 82,480 Loans held for sale, at fair value 55,191 55,191 53,463 53,463 FHLB stock, at cost 7,742 7,742 2,871 2,871 Accrued interest receivable 4,071 4,071 3,566 3,566 Paired off commitments with investors — — 53 53 Level 3 inputs: Loans receivable, gross 893,780 882,819 773,445 780,551 Servicing rights, held at lower of cost or fair value 8,352 12,022 6,795 8,608 Fair value interest rate locks with customers 1,138 1,138 726 726 Individual forward sale commitments with investors — — 51 51 Financial Liabilities Level 2 inputs: Deposits 870,113 863,210 829,842 838,087 Borrowings 106,526 106,442 7,529 7,498 Subordinated note 9,855 10,741 9,845 10,741 Accrued interest payable 289 289 214 214 Paired off commitments with investors 22 22 — — Individual forward sale commitments with investors 199 199 65 65 Level 3 inputs: Individual forward sale commitments with investors — —

Employee Benefits (Tables)

Employee Benefits (Tables)	6 Months Ended
	Jun. 30, 2018
Compensation and Retirement Disclosure [Abstract]
Schedule of Shares Under ESOP	Shares held by the ESOP at June 30, 2018 and 2017 were as follows (shown as actual): Balances Balances at June 30, 2018 at June 30, 2017 Allocated shares 153,049 126,589 Committed to be released shares 12,960 12,960 Unallocated shares 90,724 116,645 Total ESOP shares 256,733 256,194 Fair value of unallocated shares (in thousands) $ 5,262 $ 4,987

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2018
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 three and six months ended June 30, 2018 and 2017: At or For the Three Months Ended June 30, At or For the Six Months Ended June 30, Numerator: 2018 2017 2018 2017 Net income (in thousands) $ 4,257 $ 4,359 $ 8,579 $ 6,952 Denominator: Basic weighted average common shares outstanding 3,583,927 2,903,323 3,573,560 2,891,116 Dilutive shares 181,797 194,305 188,519 193,276 Diluted weighted average common shares outstanding 3,765,724 3,097,628 3,762,079 3,084,392 Basic earnings per share $ 1.19 $ 1.50 $ 2.40 $ 2.40 Diluted earnings per share $ 1.13 $ 1.41 $ 2.28 $ 2.25

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Awards	The following table presents a summary of the Company’s stock option plan awards during the six months ended June 30, 2018 (shown as actual): Weighted-Average Weighted- Remaining Average Contractual Term In Aggregate Shares Exercise Price Years Intrinsic Value Outstanding at January 1, 2018 256,237 $ 16.89 6.36 $ 9,655,010 Granted — — — — Less exercised 32,833 $ 16.89 — $ 1,318,296 Forfeited or expired — — — — Outstanding at June 30, 2018 223,404 $ 16.89 5.63 $ 10,357,009 Expected to vest, assuming a 0.31% annual forfeiture rate (1) 223,242 $ 16.89 5.63 $ 10,349,515 Exercisable at June 30, 2018 162,604 $ 16.89 5.54 $ 7,538,321 (1) Forfeiture rate has been calculated and estimated to assume a forfeiture of 1/32 over the 10-year contractual life, or 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 six months ended June 30, 2018 (shown as actual): Weighted-Average Grant-Date Fair Value Nonvested Shares Shares Per Share Nonvested at January 1, 2018 36,842 $ 17.63 Granted — — Less vested 18,421 $ 17.63 Forfeited or expired — — Nonvested at June 30, 2018 18,421 $ 17.63

Regulatory Capital (Tables)

Regulatory Capital (Tables)	6 Months Ended
	Jun. 30, 2018
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 June 30, 2018 and December 31, 2017 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 June 30, 2018 Total risk-based capital (to risk-weighted assets) $ 143,480 15.57 % $ 73,699 8.00 % $ 91,018 9.88 % $ 92,124 10.00 % Tier 1 risk-based capital (to risk-weighted assets) $ 131,961 14.32 % $ 55,274 6.00 % $ 72,594 7.88 % $ 73,699 8.00 % Tier 1 leverage capital (to average assets) $ 131,961 12.23 % $ 43,157 4.00 % N/A N/A $ 53,946 5.00 % CET 1 capital (to risk-weighted assets) $ 131,961 14.32 % $ 41,456 4.50 % $ 64,487 7.00 % $ 59,881 6.50 % At December 31, 2017 Total risk-based capital (to risk-weighted assets) $ 133,967 16.25 % $ 65,965 8.00 % $ 76,272 9.25 % $ 82,456 10.00 % Tier 1 risk-based capital (to risk-weighted assets) $ 123,651 15.00 % $ 49,474 6.00 % $ 59,781 7.25 % $ 65,965 8.00 % Tier 1 leverage capital (to average assets) $ 123,651 12.61 % $ 39,233 4.00 % N/A N/A $ 49,041 5.00 % CET 1 capital (to risk-weighted assets) $ 123,651 15.00 % $ 37,105 4.50 % $ 47,412 5.75 % $ 53,597 6.50 %

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The tables below summarize the financial results for each segment based primarily on the number of FTEs and assets within each segment for the three and six months ended June 30, 2018 and 2017: At or For the Three Months Ended June 30, 2018 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 764 $ 11,161 $ 11,925 Provision for loan losses (149) (301) (450) Noninterest income 4,447 1,167 5,614 Noninterest expense (4,508) (7,636) (12,144) Income before provision for income taxes 554 4,391 4,945 Provision for income taxes (78) (610) (688) Net income $ 476 $ 3,781 $ 4,257 Total average assets at period end $ 222,687 $ 860,175 $ 1,082,862 FTEs 117 219 336 At or For the Three Months Ended June 30, 2017 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 415 $ 9,551 $ 9,966 Provision for loan losses (117) 117 — Noninterest income 5,462 1,495 6,957 Noninterest expense (4,382) (6,562) (10,944) Income before provision for income taxes 1,378 4,601 5,979 Provision for income taxes (374) (1,246) (1,620) Net income $ 1,004 $ 3,355 $ 4,359 Total average assets at period end $ 197,431 $ 705,052 $ 902,483 FTEs 117 207 324 At or For the Six Months Ended June 30, 2018 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 1,479 $ 21,943 $ 23,422 Provision for loan losses (145) (655) (800) Noninterest income 8,213 2,425 10,638 Noninterest expense (8,564) (14,615) (23,179) Income before provision for income taxes 983 9,098 10,081 Provision for income taxes (146) (1,356) (1,502) Net income $ 837 $ 7,742 $ 8,579 Total average assets at quarter end $ 219,553 $ 830,419 $ 1,049,972 FTEs 117 219 336 At or For the Six Months Ended June 30, 2017 Home Lending Commercial and Consumer Banking Total Condensed income statement: Net interest income (1) $ 1,045 $ 17,896 $ 18,941 Provision for loan losses (197) 197 — Noninterest income 9,849 2,528 12,377 Noninterest expense (8,399) (12,922) (21,321) Income before provision for income taxes 2,298 7,699 9,997 Provision for income taxes (700) (2,345) (3,045) Net income $ 1,598 $ 5,354 $ 6,952 Total average assets at period end $ 184,499 $ 686,294 $ 870,793 FTEs 117 207 324 Net interest income is the difference between interest earned on assets and the cost of liabilities to fund those assets. Interest earned includes actual interest earned on segment assets and, if the segment has excess liabilities, interest credits for providing funding to the other segment. The cost of liabilities includes interest expense on segment liabilities and, if the segment does not have enough liabilities to fund its assets, a funding charge based on the cost of assigned liabilities to fund segment assets.

Goodwill And Other Intangible38

Goodwill And Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of changes in other intangible assets	The following table summarizes the changes in the Company’s other intangible assets for the year ended December 31, 2017, and the six months ended June 30, 2018. Other Intangible Assets Accumulated Gross Amortization Net Balance, December 31, 2016 $ 2,239 $ (522) $ 1,717 Amortization — (400) (400) Balance, December 31, 2017 2,239 (922) 1,317 Amortization — (153) (153) Balance, June 30, 2018 $ 2,239 $ (1,075) $ 1,164
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Amortization expense for core deposit intangible is expected to be as follows at June 30, 2018: Remainder of 2018 $ 154 2019 235 2020 181 2021 166 2022 166 Thereafter 262 Total $ 1,164

Basis of Presentation and Sum39

Basis of Presentation and Summary of Significant Accounting Policies (Details) $ in Thousands	Jul. 17, 2018USD ($)item	Jun. 30, 2018USD ($)item	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)segmentitem	Jun. 30, 2017USD ($)	Dec. 31, 2017USD ($)	Jul. 09, 2012
Schedule of Accounting Policies [Line Items]
Percentage of common shares purchased under ESOP							8.00%
Number of business segments | segment				2
Goodwill impairment | $						$ 0
Marketing and advertising expense | $		$ 215	$ 182	$ 364	$ 320
Proforma adjustment | ASU 2016-02
Schedule of Accounting Policies [Line Items]
Operating lease right of use asset | $						$ 4,700
Puget Sound [Member]
Schedule of Accounting Policies [Line Items]
Number of bank branches		13		13
Number of Loan Production Facilities		7		7
Tri-Cities, Washington [Member]
Schedule of Accounting Policies [Line Items]
Number of Loan Production Facilities		1		1
Anchor Bancorp
Schedule of Accounting Policies [Line Items]
Number of bank branches	9
Number of Loan Production Facilities	1
Anchor Bancorp | Forecast
Subsequent Events
Aggregate consideration paid | $	$ 77,000

Securities Available-for-sale -

Securities Available-for-sale - Available-for-sale securities reconciliation (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	$ 101,175	$ 83,085
Unrealized gains	53	269
Unrealized losses	(2,763)	(874)
Securities available-for-sale, at fair value	98,465	82,480
U.S. agency securities
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	16,064	9,077
Unrealized gains	23	49
Unrealized losses	(165)	(11)
Securities available-for-sale, at fair value	15,922	9,115
Corporate securities
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	7,092	7,113
Unrealized gains	6	9
Unrealized losses	(203)	(96)
Securities available-for-sale, at fair value	6,895	7,026
Municipal bonds
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	10,871	12,720
Unrealized gains	0	148
Unrealized losses	(389)	(82)
Securities available-for-sale, at fair value	10,482	12,786
Mortgage-backed securities
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	50,570	40,161
Unrealized gains	24	63
Unrealized losses	(1,531)	(490)
Securities available-for-sale, at fair value	49,063	39,734
U.S. Small Business Administration securities
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost	16,578	14,014
Unrealized gains	0	0
Unrealized losses	(475)	(195)
Securities available-for-sale, at fair value	$ 16,103	$ 13,819

Securities Available-for-sale41

Securities Available-for-sale - Narrative (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2018USD ($)security	Dec. 31, 2017USD ($)security
Investments, Debt and Equity Securities [Abstract]
Investments with unrealized losses of less than one year | security	45	21
Investments with unrealized losses of more than one year | security	18	17
Number of securities pledged and held at FHLB | security	7	9
Pledged securities for FHLB	$ 10,800,000	$ 10,700,000
Public deposits	7,400,000	7,600,000
Collateral requirement	3,000,000	3,200,000
Other than temporary impairment losses, investments	$ 0	$ 0

Securities Available-for-sale42

Securities Available-for-sale - Investments with Unrealized Losses Policy (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value
Unrealized loss positon, Fair Value, Less than 12 Months	$ 65,372	$ 32,209
Unrealized loss position, Fair Value, 12 Months or Longer	24,340	24,493
Unrealized loss position, Fair Value	89,712	56,702
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months	(1,493)	(331)
Unrealized loss position, Unrealized losses, 12 Months or Longer	(1,270)	(543)
Unrealized losses	(2,763)	(874)
U.S. agency securities
Fair Value
Unrealized loss positon, Fair Value, Less than 12 Months	11,898	2,987
Unrealized loss position, Fair Value, 12 Months or Longer	0	0
Unrealized loss position, Fair Value	11,898	2,987
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months	(165)	(11)
Unrealized loss position, Unrealized losses, 12 Months or Longer	0	0
Unrealized losses	(165)	(11)
Corporate securities
Fair Value
Unrealized loss positon, Fair Value, Less than 12 Months	4,009	4,102
Unrealized loss position, Fair Value, 12 Months or Longer	1,880	1,915
Unrealized loss position, Fair Value	5,889	6,017
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months	(87)	(15)
Unrealized loss position, Unrealized losses, 12 Months or Longer	(116)	(81)
Unrealized losses	(203)	(96)
Municipal bonds
Fair Value
Unrealized loss positon, Fair Value, Less than 12 Months	8,659	5,982
Unrealized loss position, Fair Value, 12 Months or Longer	1,823	0
Unrealized loss position, Fair Value	10,482	5,982
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months	(212)	(82)
Unrealized loss position, Unrealized losses, 12 Months or Longer	(177)	0
Unrealized losses	(389)	(82)
Mortgage-backed securities
Fair Value
Unrealized loss positon, Fair Value, Less than 12 Months	27,807	7,262
Unrealized loss position, Fair Value, 12 Months or Longer	17,532	20,635
Unrealized loss position, Fair Value	45,339	27,897
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months	(671)	(61)
Unrealized loss position, Unrealized losses, 12 Months or Longer	(860)	(429)
Unrealized losses	(1,531)	(490)
U.S. Small Business Administration securities
Fair Value
Unrealized loss positon, Fair Value, Less than 12 Months	12,999	11,876
Unrealized loss position, Fair Value, 12 Months or Longer	3,105	1,943
Unrealized loss position, Fair Value	16,104	13,819
Unrealized Losses
Unrealized loss position, Unrealized losses, Less than 12 Months	(358)	(162)
Unrealized loss position, Unrealized losses, 12 Months or Longer	(117)	(33)
Unrealized losses	$ (475)	$ (195)

Securities Available-for-sale43

Securities Available-for-sale - Available for Sale Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Amortized Cost
Total	$ 101,175	$ 83,085
Fair Value
Total	98,465	82,480
U.S. agency securities
Amortized Cost
Due after five years through ten years	11,066	4,079
Due after ten years	4,998	4,998
Subtotal	16,064	9,077
Total	16,064	9,077
Fair Value
Due after five years through ten years	10,994	4,124
Due after ten years	4,928	4,991
Subtotal	15,922	9,115
Total	15,922	9,115
Corporate securities
Amortized Cost
Due after one year through five years	6,096	5,117
Due after five years through ten years	996	1,996
Subtotal	7,092	7,113
Total	7,092	7,113
Fair Value
Due after one year through five years	5,990	5,111
Due after five years through ten years	905	1,915
Subtotal	6,895	7,026
Total	6,895	7,026
Municipal bonds
Amortized Cost
Due after one year through five years	2,659	2,001
Due after five years through ten years	1,150	4,111
Due after ten years	7,062	6,608
Subtotal	10,871	12,720
Total	10,871	12,720
Fair Value
Due after one year through five years	2,589	2,026
Due after five years through ten years	1,130	4,206
Due after ten years	6,763	6,554
Subtotal	10,482	12,786
Total	10,482	12,786
Mortgage-backed securities
Amortized Cost
Mortgage-backed securities	50,570	40,161
Total	50,570	40,161
Fair Value
Mortgage-backed securities	49,063	39,734
Total	49,063	39,734
Federal National Mortgage Association ("FNMA")
Amortized Cost
Mortgage-backed securities	33,586	23,310
Fair Value
Mortgage-backed securities	32,675	23,091
Federal Home Loan Mortgage Corporation ("FHLMC")
Amortized Cost
Mortgage-backed securities	11,185	10,818
Fair Value
Mortgage-backed securities	10,757	10,629
Government National Mortgage Association ("GNMA")
Amortized Cost
Mortgage-backed securities	5,799	6,033
Fair Value
Mortgage-backed securities	5,631	6,014
U.S. Small Business Administration securities
Amortized Cost
Due after five years through ten years	14,672	12,065
Due after ten years	1,906	1,949
Subtotal	16,578	14,014
Total	16,578	14,014
Fair Value
Due after five years through ten years	14,263	11,896
Due after ten years	1,840	1,923
Subtotal	16,103	13,819
Total	$ 16,103	$ 13,819

Securities Available-for-sale44

Securities Available-for-sale - Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Gross Gains	$ 0	$ 237	$ 113	$ 237
Gross (Losses)	0	0	0	0
Proceeds	$ 0	$ 29,988	$ 5,305	$ 29,988

Loans Receivable and Allowanc45

Loans Receivable and Allowance For Loan Losses - Composition of Loan Portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 893,780	$ 773,445
Allowance for loan losses	(11,571)	(10,756)
Deferred costs and fees, net	(2,885)	(2,708)
Premiums on purchased loans	1,876	1,577
Loans receivable, net	881,200	761,558
CONSUMER LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	239,874	208,668
Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	147,067	130,176
Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	42,189	41,049
Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	48,591	35,397
Other consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,027	2,046
COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	177,643	124,703
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	110,962	83,306
Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	66,681	41,397
Residential Portfolio Segment | REAL ESTATE LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	476,263	440,074
Residential Portfolio Segment | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	64,599	63,611
Residential Portfolio Segment | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	160,521	143,068
Residential Portfolio Segment | Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	25,460	25,289
Residential Portfolio Segment | One-to-four-family (1)
Financing Receivable, Recorded Investment [Line Items]
Total loans	177,988	163,655
Residential Portfolio Segment | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 47,695	$ 44,451

Loans Receivable and Allowanc46

Loans Receivable and Allowance For Loan Losses - Narrative (Details)	Jun. 30, 2018segmentitem	Dec. 31, 2017segmentitem
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan portfolio segments | segment	3	3
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of units in real estate property | item	5	5

Loans Receivable and Allowanc47

Loans Receivable and Allowance For Loan Losses - Allowance for Loan Losses by Loan Categories (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
ALLOWANCE FOR LOAN LOSSES
Beginning balance	$ 11,140	$ 10,147	$ 10,756	$ 10,211
Provision for loan loss	450	0	800	0
Charge-offs	(224)	(179)	(455)	(384)
Recoveries	205	175	470	316
Net recoveries (charge-offs)	(19)	(4)	15	(68)
Ending balance	11,571	10,143	11,571	10,143
Loans individually evaluated for impairment					$ 130		$ 0
Loans collectively evaluated for impairment					11,441		10,143
Period end amount allocated	11,140	10,147	10,756	10,211	11,571	$ 10,756	10,143
LOANS RECEIVABLE
Loans individually evaluated for impairment					627		439
Loans collectively evaluated for impairment					893,153		719,863
Total loans receivable					893,780	773,445	720,302
REAL ESTATE LOANS
ALLOWANCE FOR LOAN LOSSES
Beginning balance	4,780	3,813	4,770	3,547
Provision for loan loss	330	331	343	596
Charge-offs	(1)	0	(4)	0
Recoveries	16	0	16	1
Net recoveries (charge-offs)	15	0	12	1
Ending balance	5,125	4,144	5,125	4,144
Loans individually evaluated for impairment					21		0
Loans collectively evaluated for impairment					5,104		4,144
Period end amount allocated	4,780	3,813	4,770	3,547	5,125	4,770	4,144
LOANS RECEIVABLE
Loans individually evaluated for impairment					317		439
Loans collectively evaluated for impairment					475,946		397,256
Total loans receivable					476,263	440,074	397,695
CONSUMER LOANS
ALLOWANCE FOR LOAN LOSSES
Beginning balance	2,934	2,588	2,814	2,082
Provision for loan loss	285	87	370	661
Charge-offs	(223)	(179)	(451)	(384)
Recoveries	188	173	451	310
Net recoveries (charge-offs)	(35)	(6)	0	(74)
Ending balance	3,184	2,669	3,184	2,669
Loans individually evaluated for impairment					109		0
Loans collectively evaluated for impairment					3,075		2,669
Period end amount allocated	2,934	2,588	2,814	2,082	3,184	2,814	2,669
LOANS RECEIVABLE
Loans individually evaluated for impairment					310		0
Loans collectively evaluated for impairment					239,564		190,729
Total loans receivable					239,874	208,668	190,729
COMMERCIAL BUSINESS LOANS
ALLOWANCE FOR LOAN LOSSES
Beginning balance	2,311	2,169	2,014	2,675
Provision for loan loss	255	282	550	(227)
Charge-offs	0	0	0	0
Recoveries	1	2	3	5
Net recoveries (charge-offs)	1	2	3	5
Ending balance	2,567	2,453	2,567	2,453
Loans individually evaluated for impairment					0		0
Loans collectively evaluated for impairment					2,567		2,453
Period end amount allocated	2,311	2,169	2,014	2,675	2,567	2,014	2,453
LOANS RECEIVABLE
Loans individually evaluated for impairment					0		0
Loans collectively evaluated for impairment					177,643		131,878
Total loans receivable					177,643	124,703	131,878
Unallocated Financing Receivables [Member]
ALLOWANCE FOR LOAN LOSSES
Beginning balance	1,115	1,577	1,158	1,907
Provision for loan loss	(420)	(700)	(463)	(1,030)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Net recoveries (charge-offs)	0	0	0	0
Ending balance	695	877	695	877
Loans individually evaluated for impairment					0		0
Loans collectively evaluated for impairment					695		877
Period end amount allocated	$ 1,115	$ 1,577	$ 1,158	$ 1,907	695	$ 1,158	877
LOANS RECEIVABLE
Loans individually evaluated for impairment					0		0
Loans collectively evaluated for impairment					0		0
Total loans receivable					$ 0		$ 0

Loans Receivable and Allowanc48

Loans Receivable and Allowance For Loan Losses - Aging Analysis of Past Due Loans (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	$ 0	$ 0
Total Past Due	926,000	1,588,000
Current	892,854,000	771,857,000
Total loans receivable	893,780,000	773,445,000	$ 720,302,000
REAL ESTATE LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans receivable	476,263,000	440,074,000	397,695,000
Total real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	213,000	400,000
Current	476,050,000	439,674,000
Total loans receivable	476,263,000	440,074,000
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	64,599,000	63,611,000
Total loans receivable	64,599,000	63,611,000
Construction and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	160,521,000	143,068,000
Total loans receivable	160,521,000	143,068,000
Home equity.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	72,000	258,000
Current	25,388,000	25,031,000
Total loans receivable	25,460,000	25,289,000
One-to-four-family (1)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	141,000	142,000
Current	177,847,000	163,513,000
Total loans receivable	177,988,000	163,655,000
Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	47,695,000	44,451,000
Total loans receivable	47,695,000	44,451,000
CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	713,000	637,000
Current	239,161,000	208,031,000
Total loans receivable	239,874,000	208,668,000	190,729,000
Indirect home improvement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	601,000	569,000
Current	146,466,000	129,607,000
Total loans receivable	147,067,000	130,176,000
Solar
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	84,000	68,000
Current	42,105,000	40,981,000
Total loans receivable	42,189,000	41,049,000
Marine
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	16,000	0
Current	48,575,000	35,397,000
Total loans receivable	48,591,000	35,397,000
Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	12,000	0
Current	2,015,000	2,046,000
Total loans receivable	2,027,000	2,046,000
COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	551,000
Current	177,643,000	124,152,000
Total loans receivable	177,643,000	124,703,000	$ 131,878,000
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	551,000
Current	110,962,000	82,755,000
Total loans receivable	110,962,000	83,306,000
Warehouse lending
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current	66,681,000	41,397,000
Total loans receivable	66,681,000	41,397,000
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	411,000	568,000
30-59 Days Past Due | Total real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	264,000
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	0	0
30-59 Days Past Due | Home equity.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	122,000
30-59 Days Past Due | One-to-four-family (1)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	142,000
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	411,000	304,000
30-59 Days Past Due | Indirect home improvement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	360,000	255,000
30-59 Days Past Due | Solar
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	24,000	49,000
30-59 Days Past Due | Marine
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	16,000	0
30-59 Days Past Due | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11,000	0
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	313,000	785,000
60-89 Days Past Due | Total real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	141,000	0
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	0	0
60-89 Days Past Due | One-to-four-family (1)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	141,000	0
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	172,000	234,000
60-89 Days Past Due | Indirect home improvement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	127,000	215,000
60-89 Days Past Due | Solar
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	44,000	19,000
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
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,000	0
60-89 Days Past Due | COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	551,000
60-89 Days Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	551,000
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	202,000	235,000
90 Days or More Past Due | Total real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	72,000	136,000
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	72,000	136,000
90 Days or More Past Due | One-to-four-family (1)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
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	130,000	99,000
90 Days or More Past Due | Indirect home improvement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	114,000	99,000
90 Days or More Past Due | Solar
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	16,000	0
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
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
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]
Total Past Due	627,000	1,039,000
Non-Accrual | Total real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	317,000	293,000
Non-Accrual | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Non-Accrual | Construction and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Non-Accrual | Home equity.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	176,000	151,000
Non-Accrual | One-to-four-family (1)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	141,000	142,000
Non-Accrual | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Non-Accrual | CONSUMER LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	310,000	195,000
Non-Accrual | Indirect home improvement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	274,000	195,000
Non-Accrual | Solar
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	35,000	0
Non-Accrual | Marine
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Non-Accrual | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,000	0
Non-Accrual | COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	551,000
Non-Accrual | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	551,000
Non-Accrual | Warehouse lending
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 0	$ 0

Loans Receivable and Allowanc49

Loans Receivable and Allowance For Loan Losses - Financing Receivables, Related Allowance Recorded and No Related Allowance Recorder (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded					$ 769
Unpaid Principal Balance, with related allowance recorded	$ 451		$ 451		337
Impaired Financing Receivable, Unpaid Principal Balance, Total	627		627		1,106
Impaired Financing Receivable, Write-downs [Abstract]
Impairment					(12)
Write-downs with related allowance recorded	0		0		0
Write-downs	0		0		(12)
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded					757
Recorded Investment, with related allowance recorded	451		451		337
Recorded Investment	627		627		1,094
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with no related allowance recorded					0
Related Allowance, with related allowance recorded	130		130		89
Related Allowance	130		130		89
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with related allowance recorded	563	$ 0	547	$ 0
Impaired Financing Receivable, Average Recorded Investment	711	441	729	408
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with related allowance recorded	7	0	14	0
Interest Income Recognized	8	1	17	4
CONSUMER LOANS
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with related allowance recorded	310		310		195
Impaired Financing Receivable, Write-downs [Abstract]
Write-downs with related allowance recorded	0		0		0
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with related allowance recorded	310		310		195
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with related allowance recorded	109		109		68
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with related allowance recorded	292	0	276	0
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with related allowance recorded	6	0	11	0
COMMERCIAL BUSINESS LOANS
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded					551
Impaired Financing Receivable, Write-downs [Abstract]
Impairment					0
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded					551
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with no related allowance recorded					0
Total real estate loans
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded					218
Impaired Financing Receivable, Write-downs [Abstract]
Impairment					(12)
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded					206
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with no related allowance recorded					0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	148	441	182	408
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	1	1	3	4
Total real estate loans | Home equity
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded	176		176		151
Impaired Financing Receivable, Write-downs [Abstract]
Impairment	0		0		0
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded	176		176		151
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with no related allowance recorded	0		0		0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	148	240	182	230
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	1	0	3	0
Total real estate loans | One-to-four-family (1)
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Unpaid Principal Balance, with no related allowance recorded					67
Unpaid Principal Balance, with related allowance recorded	141		141		142
Impaired Financing Receivable, Write-downs [Abstract]
Impairment					(12)
Write-downs with related allowance recorded	0		0		0
Impaired Financing Receivable, Recorded Investment [Abstract]
Recorded Investment, with no related allowance recorded					55
Recorded Investment, with related allowance recorded	141		141		142
Impaired Financing Receivable Related Allowance Abstract
Related Allowance, with no related allowance recorded					0
Related Allowance, with related allowance recorded	21		21		$ 21
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average Recorded Investment, with no related allowance recorded	0	201	0	178
Average Recorded Investment, with related allowance recorded	271	0	271	0
Impaired Financing Receivable, Interest Income [Abstract]
Interest Income Recognized, with no related allowance recorded	0	1	0	4
Interest Income Recognized, with related allowance recorded	$ 1	$ 0	$ 3	$ 0

Loans Receivable and Allowanc50

Loans Receivable and Allowance For Loan Losses - Loans by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 893,780	$ 773,445	$ 720,302
REAL ESTATE LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	476,263	440,074	397,695
Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	64,599	63,611
Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	160,521	143,068
Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	25,460	25,289
One-to-four-family (1)
Financing Receivable, Recorded Investment [Line Items]
Total loans	177,988	163,655
Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	47,695	44,451
CONSUMER LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	239,874	208,668	190,729
Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	147,067	130,176
Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	42,189	41,049
Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	48,591	35,397
Other consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,027	2,046
COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	177,643	124,703	$ 131,878
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	110,962	83,306
Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	66,681	41,397
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	885,453	764,318
Pass | REAL ESTATE LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	475,946	438,227
Pass | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	64,599	62,057
Pass | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	160,521	143,068
Pass | Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	25,284	25,138
Pass | One-to-four-family (1)
Financing Receivable, Recorded Investment [Line Items]
Total loans	177,847	163,513
Pass | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	47,695	44,451
Pass | CONSUMER LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	239,564	208,425
Pass | Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	146,793	129,981
Pass | Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	42,154	41,049
Pass | Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	48,591	35,397
Pass | Other consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,026	1,998
Pass | COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	169,943	117,666
Pass | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	103,262	76,942
Pass | Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	66,681	40,724
Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,228	673
Watch | REAL ESTATE LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | Home equity.
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | One-to-four-family (1)
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
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
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Watch | COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,228	673
Watch | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,228	0
Watch | Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	673
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	338	1,979
Special Mention | REAL ESTATE LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	1,554
Special Mention | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	1,554
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	0	0
Special Mention | One-to-four-family (1)
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
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	0
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
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Special Mention | COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	338	425
Special Mention | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	338	425
Special Mention | Warehouse lending
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,761	6,475
Substandard | REAL ESTATE LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	317	293
Substandard | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	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	176	151
Substandard | One-to-four-family (1)
Financing Receivable, Recorded Investment [Line Items]
Total loans	141	142
Substandard | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Substandard | CONSUMER LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	310	243
Substandard | Indirect home improvement
Financing Receivable, Recorded Investment [Line Items]
Total loans	274	195
Substandard | Solar
Financing Receivable, Recorded Investment [Line Items]
Total loans	35	0
Substandard | Marine
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Substandard | Other consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	1	48
Substandard | COMMERCIAL BUSINESS LOANS
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,134	5,939
Substandard | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,134	5,939
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 (1)
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
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 (1)
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
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

Servicing Rights - Narrative (D

Servicing Rights - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractually specified servicing fees, late fees, and other ancillary fees	$ 573,000	$ 682,000	$ 1,100,000	$ 1,300,000
Mortgage, commercial and consumer servicing rights
Off-balance Sheet Risks, Disclosure Information [Line Items]
The unpaid principal balances of mortgage loans serviced	955,100,000		955,100,000		$ 778,900,000
Mortgage servicing rights
Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair market value of servicing rights' assets	$ 12,000,000		$ 12,000,000		$ 8,600,000

Servicing Rights - Servicing Ri

Servicing Rights - Servicing Rights (Details) - Mortgage servicing rights - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance	$ 7,515	$ 8,939	$ 6,795	$ 8,459
Additions	1,381	1,253	2,519	2,242
Sales	0	(4,751)	0	(4,751)
Servicing rights amortized	(544)	(541)	(962)	(1,050)
Impairment on servicing rights	0	(1)	0	(1)
Ending balance	$ 8,352	$ 4,899	$ 8,352	$ 4,899

Servicing Rights - Valuation As

Servicing Rights - Valuation Assumptions (Details)	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Off-balance Sheet Risks, Disclosure Information [Line Items]
Weighted average discount rate	9.50%	9.50%
Conditional prepayment rate ("CPR")	9.00%	10.30%
Weighted average life in years	8 years	7 years 1 month 6 days
Mortgage, commercial and consumer servicing rights
Off-balance Sheet Risks, Disclosure Information [Line Items]
Weighted average discount rate	9.80%		9.60%
Conditional prepayment rate ("CPR")	9.00%		10.90%

Servicing Rights - Changes in V

Servicing Rights - Changes in Valuation Assumptions (Details) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Off-balance Sheet Risks, Disclosure Information [Line Items]
Basis Points Drop in Note Rate, Assumption One	0.50%		0.50%
Basis Points Drop in Note Rate, Assumption Two	1.00%		1.00%
Conditional prepayment rate	9.00%	10.30%
Discount rate	9.50%	9.50%
Mortgage, commercial and consumer servicing rights
Off-balance Sheet Risks, Disclosure Information [Line Items]
Aggregate portfolio principal balance	$ 952,257		$ 775,093
Weighted average rate of note	4.20%		4.10%
Conditional prepayment rate	9.00%		10.90%
Conditional prepayment rate, 0.5% Adverse Change	10.90%		17.70%
Conditional prepayment rate, 1.0% Adverse Change	15.30%		24.50%
Fair value MSR	$ 12,016		$ 8,602
Fair value MSR, 0.5% Adverse Change	10,752		6,811
Fair value of MSR, 1.0% Adverse Change	$ 9,162		$ 5,614
Percentage of MSR	1.30%		1.10%
Percentage of MSR, 0.5% Adverse Change	1.10%		0.90%
Percentage of MSR, 1.0% Adverse Change	1.00%		0.70%
Discount rate	9.80%		9.60%
Discount rate, 0.5% Adverse Change	10.30%		10.10%
Discount rate, 1.0% Adverse Change	10.80%		10.60%
Fair value MSR, 0.5% Adverse Change	$ 11,754		$ 8,433
Fair value MSR, 1.0% Adverse Change	$ 11,503		$ 8,271
Percentage of MSR, 0.5% Adverse Change	1.20%		1.10%
Percentage of MSR, 1.0% Adverse Change	1.20%		1.10%

Derivatives (Details)

Derivatives (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Derivative [Line Items]
Margin collateral	$ 220,000		$ 220,000		$ 75,000
Derivative instruments, gain (loss) on sale of loans	403,000	$ 114,000	484,000	$ (381,000)
Not Designated as Hedging Instrument | Fallout adjusted interest rate lock commitments with customers
Derivative [Line Items]
Notional	49,621,000		49,621,000		31,951,000
Asset	1,138,000		1,138,000		726,000
Liability	0		0		0
Not Designated as Hedging Instrument | Mandatory and best effort forward commitments with investors
Derivative [Line Items]
Notional	24,739,000		24,739,000		12,505,000
Asset	0		0		51,000
Liability	18,000		18,000		0
Not Designated as Hedging Instrument | Mortgage-backed securities
Derivative [Line Items]
Notional	70,000,000		70,000,000		66,500,000
Asset	0		0		0
Liability	199,000		199,000		65,000
Not Designated as Hedging Instrument | TBA mortgage-backed securities forward sales paired off with investors
Derivative [Line Items]
Notional	21,500,000		21,500,000		36,500,000
Asset	0		0		53,000
Liability	$ 22,000		$ 22,000		$ 0

Deposits - Deposit Liabilities

Deposits - Deposit Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
Noninterest-bearing checking	$ 172,848	$ 177,739
Interest-bearing checking	128,080	119,872
Savings	77,631	72,082
Money market (4)	210,742	228,742
Certificates of deposit less than $100,000	144,755	111,489
Certificates of deposit of $100,000 through $250,000	79,131	77,934
Certificates of deposit of $250,000 and over	45,417	32,833
Escrow accounts related to mortgages serviced	11,509	9,151
Total deposits	870,113	829,842
Remaining Branch Purchase Deposits	124,000	134,600
Certificate of Deposit, Brokered	4,000	6,500
Interest-bearing Domestic Deposit, Brokered	86,600	59,300
Federal Reserve Bank required deposit reserves	$ 17,900	$ 18,200

Deposits - Maturities of Time D

Deposits - Maturities of Time Deposits for Future Periods (Details) $ in Thousands	Jun. 30, 2018USD ($)
Banking and Thrift [Abstract]
Maturing in 2018	$ 89,416
Maturing in 2019	90,581
Maturing in 2020	46,314
Maturing in 2021	23,286
Maturing in 2022	17,779
Thereafter	1,927
Total	$ 269,303

Deposits - Interest Expense by

Deposits - Interest Expense by Deposit Category (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Banking and Thrift [Abstract]
Interest-bearing checking	$ 63	$ 14	$ 130	$ 22
Savings and money market	393	312	712	581
Certificates of deposit	976	570	1,833	1,145
Total	$ 1,432	$ 896	$ 2,675	$ 1,748

Commitments and Contingencies -

Commitments and Contingencies - Commitment (Details) - Commitments to Extend Credit - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	$ 279,527	$ 284,887
REAL ESTATE LOANS
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	171,329	144,091
Commercial
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	108	107
Construction and development
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	79,038	73,321
One-to-four-family (1)
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	55,817	37,336
Home equity.
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	35,750	32,889
Commercial/Multi-family
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	616	438
Other consumer
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	10,184	10,041
COMMERCIAL BUSINESS LOANS
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	98,014	130,755
Commercial and industrial
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	53,995	52,452
Warehouse lending
Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments	$ 44,019	$ 78,303

Commitments and Contingencies60

Commitments and Contingencies - Narrative (Details)	1 Months Ended	6 Months Ended
	Mar. 31, 2008shares	Jun. 30, 2018USD ($)action$ / shares	Dec. 31, 2017USD ($)$ / shares
Loss Contingencies [Line Items]
Amount of loans sold to FHLB		$ 57,600,000
Federal Home Loan Bank, First Loss Account Established		633,000
Bank recourse obligation		$ 367,000
Bank recourse obligation, percentage of loans outstanding		0.64%
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
Number of shares received in an IPO | shares	7,158
Common stock, conversion ratio	1.6298
Carrying value of stock		$ 0
Pending material legal actions | action		0
Visa, Inc.
Loss Contingencies [Line Items]
Market value of stock (in dollars per share) | $ / shares		$ 132.45	$ 114.02
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		$ 230,000	$ 253,000
Guarantee on loans sold
Loss Contingencies [Line Items]
Reserve for estimated losses		$ 971,000	$ 1,000,000

Fair Value of Financial Instr61

Fair Value of Financial Instruments - Available for Sale Securities Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	$ 98,465	$ 82,480
U.S. agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	15,922	9,115
Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	6,895	7,026
Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	10,482	12,786
Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	49,063	39,734
U.S. Small Business Administration securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	16,103	13,819
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Level 1 | U.S. agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Level 1 | Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Level 1 | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Level 1 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Level 1 | U.S. Small Business Administration securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	98,465	82,480
Level 2 | U.S. agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	15,922	9,115
Level 2 | Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	6,895	7,026
Level 2 | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	10,482	12,786
Level 2 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	49,063	39,734
Level 2 | U.S. Small Business Administration securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	16,103	13,819
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Level 3 | U.S. agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Level 3 | Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Level 3 | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Level 3 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	0	0
Level 3 | U.S. Small Business Administration securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale, at fair value	$ 0	$ 0

Fair Value of Financial Instr62

Fair Value of Financial Instruments - Mortgage loans held for sale (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, at fair value	$ 55,191	$ 53,463
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, at fair value	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, at fair value	55,191	53,463
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale, at fair value	$ 0	$ 0

Fair Value of Financial Instr63

Fair Value of Financial Instruments - Interest Rate Lock Commitments Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - Fallout adjusted interest rate lock commitments with customers - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Lock Commitments with Customers	$ 1,138	$ 726
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Lock Commitments with Customers	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Lock Commitments with Customers	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Lock Commitments with Customers	$ 1,138	$ 726

Fair Value of Financial Instr64

Fair Value of Financial Instruments - Forward Sale Commitments with Investors (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individual Forward Sale Commitments with Investors	$ (217)	$ (14)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individual Forward Sale Commitments with Investors	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individual Forward Sale Commitments with Investors	(199)	(65)
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individual Forward Sale Commitments with Investors	$ (18)	$ 51

Fair Value of Financial Instr65

Fair Value of Financial Instruments - Paired Off Commitments with Investors (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Paired off commitments with investors, liability	$ (22)
Paired off commitments with investors		$ 53
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Paired off commitments with investors, liability	0
Paired off commitments with investors		0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Paired off commitments with investors, liability	(22)
Paired off commitments with investors		53
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Paired off commitments with investors, liability	$ 0
Paired off commitments with investors		$ 0

Fair Value of Financial Instr66

Fair Value of Financial Instruments - Impaired Loans and OREO (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans, fair value	$ 627	$ 1,094
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans, fair value	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans, fair value	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans, fair value	$ 627	$ 1,094

Fair Value of Financial Instr67

Fair Value of Financial Instruments - Discount Rate (Details)	Jun. 30, 2018item
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
Fallout adjusted 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
Mandatory and best effort forward commitments with investors
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Measurement Input [Extensible List]	fsbw:MeasurementInputPullThroughExpectationsMember
Debt Securities, Available-for-sale, Valuation Technique [Extensible List]	fsbw:QuotedMarketPricesMember
Level 3 | Fair Value, Measurements, Recurring | Fallout adjusted 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 | Fallout adjusted 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 | Fallout adjusted 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)	0.948
Level 3 | Fair Value, Measurements, Recurring | Mandatory and best effort forward commitments with investors | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.80
Level 3 | Fair Value, Measurements, Recurring | Mandatory and best effort forward commitments with investors | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.99
Level 3 | Fair Value, Measurements, Recurring | Mandatory and best effort forward commitments with investors | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement inputs (as a percent)	0.948
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)	0.25
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)	0.207

Fair Value of Financial Instr68

Fair Value of Financial Instruments - Fair Value Level 3 on recurring basis (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fallout adjusted interest rate lock commitments with customers
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 815	$ 1,437	$ 726	$ 818
Purchases and Issuances	3,140	4,067	5,575	7,549
Sales and Settlements	(2,817)	(4,292)	(5,163)	(7,155)
Ending Balance	1,138	1,212	1,138	1,212
Net change in fair value for gains/(losses) relating to items held at end of period	323	(225)	412	394
Mandatory and best effort forward commitments with investors
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	4	(19)	51	177
Purchases and Issuances	84	(107)	656	(303)
Sales and Settlements	(106)	209	(725)	209
Ending Balance	(18)	83	(18)	83
Net change in fair value for gains/(losses) relating to items held at end of period	$ (22)	$ 102	$ (69)	$ (94)

Fair Value of Financial Instr69

Fair Value of Financial Instruments - Fair Value By Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financial Assets
Certificates of deposit at other financial institutions	$ 17,611	$ 18,108
Fair Value, Measurements, Recurring
Financial Assets
Securities available-for-sale, at fair value	98,465	82,480
Loans held for sale, at fair value	55,191	53,463
Paired off commitments with investors		53
Financial Liabilities
Paired Off Commitments with Investors	(22)
Level 1 | Fair Value, Measurements, Recurring
Financial Assets
Securities available-for-sale, at fair value	0	0
Loans held for sale, at fair value	0	0
Paired off commitments with investors		0
Financial Liabilities
Paired Off Commitments with Investors	0
Level 2 | Fair Value, Measurements, Recurring
Financial Assets
Securities available-for-sale, at fair value	98,465	82,480
Loans held for sale, at fair value	55,191	53,463
Paired off commitments with investors		53
Financial Liabilities
Paired Off Commitments with Investors	(22)
Level 3 | Fair Value, Measurements, Recurring
Financial Assets
Securities available-for-sale, at fair value	0	0
Loans held for sale, at fair value	0	0
Paired off commitments with investors		0
Financial Liabilities
Paired Off Commitments with Investors	0
Carrying Amount | Level 1
Financial Assets
Cash and cash equivalents	21,977	18,915
Certificates of deposit at other financial institutions	17,611	18,108
Carrying Amount | Level 2
Financial Assets
Securities available-for-sale, at fair value	98,465	82,480
Loans held for sale, at fair value	55,191	53,463
FHLB stock, at cost	7,742	2,871
Accrued interest receivable	4,071	3,566
Paired off commitments with investors	0	53
Financial Liabilities
Deposits	870,113	829,842
Borrowings	106,526	7,529
Subordinated note, net	9,855	9,845
Accrued interest payable	289	214
Paired Off Commitments with Investors	22	0
Individual forward sale commitments with investors, financial liability	199	65
Carrying Amount | Level 3
Financial Assets
Individual forward sale commitments with investors	0	51
Loans receivable, gross	893,780	773,445
Servicing rights, held at lower of cost or fair value	8,352	6,795
Fair value interest rate locks with customers	1,138	726
Financial Liabilities
Individual forward sale commitments with investors, financial liability	18	0
Fair Value | Level 1
Financial Assets
Cash and cash equivalents	21,977	18,915
Certificates of deposit at other financial institutions	17,611	18,108
Fair Value | Level 2
Financial Assets
Securities available-for-sale, at fair value	98,465	82,480
Loans held for sale, at fair value	55,191	53,463
FHLB stock, at cost	7,742	2,871
Accrued interest receivable	4,071	3,566
Paired off commitments with investors	0	53
Financial Liabilities
Deposits	863,210	838,087
Borrowings	106,442	7,498
Subordinated note, net	10,741	10,741
Accrued interest payable	289	214
Paired Off Commitments with Investors	22	0
Individual forward sale commitments with investors, financial liability	199	65
Fair Value | Level 3
Financial Assets
Individual forward sale commitments with investors	0	51
Loans receivable, gross	882,819	780,551
Servicing rights, held at lower of cost or fair value	12,022	8,608
Fair value interest rate locks with customers	1,138	726
Financial Liabilities
Individual forward sale commitments with investors, financial liability	$ 18	$ 0

Employee Benefits - Narrative (

Employee Benefits - Narrative (Details) - USD ($)	Jul. 09, 2012	Jan. 02, 2012	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Number of hours of service required for participation in ESOP, per first 12 month period (in hours)		1000 hours
Vesting percentage after requisite service period is met (as a percent)		100.00%
Requisite service period (in years)		2 years
Employee stock ownership plan (ESOP), requisite service period and 12 months		1000 hours
Employee stock ownership plan (ESOP), debt structure, employer loan, amount	$ 2,600,000
Employee stock ownership plan shares purchased	259,210
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							$ 263,000
Employee stock ownership plan (ESOP), interest payments from esop							$ 32,000
ESOP compensation expense for allocated shares			$ 393,000	$ 317,000	$ 752,000	$ 554,000

Employee Benefits - Schedule of

Employee Benefits - Schedule of Shares Under ESOP (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017	Jul. 09, 2012
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]
Allocated shares	153,049	126,589
Committed to be released shares	12,960	12,960
Unallocated shares	90,724	116,645
Total ESOP shares	256,733	256,194	259,210
Fair value of unallocated shares (in thousands)	$ 5,262	$ 4,987

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net Income	$ 4,257	$ 4,359	$ 8,579	$ 6,952
Basic weighted average common shares outstanding	3,583,927	2,903,323	3,573,560	2,891,116
Dilutive shares (in shares)	181,797	194,305	188,519	193,276
Denominator for diluted earnings per share- weighted average common shares outstanding (shares)	3,765,724	3,097,628	3,762,079	3,084,392
Basic earnings per share (in dollars per share)	$ 1.19	$ 1.50	$ 2.40	$ 2.40
Diluted earnings per share (in dollars per share)	$ 1.13	$ 1.41	$ 2.28	$ 2.25

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details)	May 17, 2018shares	Jan. 01, 2016$ / sharesshares	May 08, 2014$ / sharesshares	Sep. 30, 2013shares	Jun. 30, 2018USD ($)shares	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)shares	Jun. 30, 2017USD ($)	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected forfeiture rate over contractual term							3.1
Award contractual life							10 years
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense | $					$ 150,000	$ 166,000	$ 285,000	$ 358,000
Granted (in shares)							0
Stock option, fair value assumption, expected life									6 years 4 months 10 days
Remaining weighted-average vesting period							5 years 7 months 17 days
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
Granted (in shares)				322,000
Market price per share (in dollars per share) | $ / shares			$ 16.89
Shares available for grant					6,013		6,013
Award vesting period			5 years
Annual award vesting percentage			20.00%
Award contractual life			10 years
Expiration period			10 years
Stock option, fair value assumption, expected life			6 years 6 months
Unrecognized compensation cost, nonvested awards | $					$ 188,000		$ 188,000
Remaining weighted-average vesting period							10 months
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
Shares		4,500	125,105
Market price per share (in dollars per share) | $ / shares		$ 26	$ 16.89
Award vesting period			5 years
Unrecognized compensation cost, nonvested awards | $					$ 264,000		$ 264,000
Weighted-average vesting period							10 months
2013 Equity Incentive Plan | Restricted stock awards | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
2018 Equity Incentive Plan | Equity option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	487,000
Percent of the number of shares authorized allocated to various stock compensation plans (as a percent)	75.00%
Granted (in shares)					0
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
Percent of the number of shares authorized allocated to various stock compensation plans (as a percent)	25.00%
Granted (in shares)					0
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

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Details) - 2013 Equity Incentive Plan	6 Months Ended	12 Months Ended
	Jun. 30, 2018USD ($)$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares
Shares
Outstanding, beginning balance (in shares) | shares	256,237
Granted, Shares | shares	0
Less exercised (in shares) | shares	32,833
Forfeited or Expired, Shares | shares	0
Outstanding, ending balance (in shares) | shares	223,404	256,237
Expected to vest, assuming a 0.31% annual forfeiture rate (in shares) | shares	223,242
Exercisable (in shares) | shares	162,604
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expected Forfeiture Rate	0.31%
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 16.89
Granted (in dollars per share)	0
Less exercised (in dollars per share)	16.89
Forfeited or Expired, Weighted-Average Exercise Price (in dollars per share)	0
Outstanding, ending balance (in dollars per share)	16.89	$ 16.89
Expected to vest, assuming a 0.31% annual forfeiture rate (in dollars per share)	16.89
Exercisable (in dollars per share)	$ 16.89
Weighted-Average Remaining Contractual Term In Years
Outstanding, beginning balance		6 years 4 months 10 days
Outstanding, ending balance	5 years 7 months 17 days
Expected to vest, assuming a 0.31% annual forfeiture rate, Weighted Average Remaining Contractual Term	5 years 7 months 17 days
Exercisable	5 years 6 months 15 days
Aggregate Intrinsic Value
Beginning balance | $	$ 9,655,010
Granted	$ 0
Less exercised | $	$ 1,318,296
Forfeited or Expired, Aggregate Intrinsic Value | $	0
Ending balance | $	10,357,009	$ 9,655,010
Expected to vest, assuming a 0.31% annual forfeiture rate | $	10,349,515
Exercisable | $	$ 7,538,321

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Awards (Details) - Restricted stock awards	6 Months Ended
	Jun. 30, 2018$ / sharesshares
Shares
Nonvested, Beginning balance (in shares) | shares	36,842
Granted (shares) | shares	0
Less vested (in shares) | shares	18,421
Forfeited or expired ( in shares) | shares	0
Nonvested, Ending balance (in shares) | shares	18,421
Weighted-Average Grant-Date Fair Value Per Share
Nonvested, Beginning balance (in dollars per share) | $ / shares	$ 17.63
Granted (in dollars per share) | $ / shares	0
Less vested (in dollars per share) | $ / shares	17.63
Forfeited or expired (in dollars per share) | $ / shares	0
Nonvested, Ending balance (in dollars per share) | $ / shares	$ 17.63
2013 Equity Incentive Plan
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	10 months

Regulatory Capital - Compliance

Regulatory Capital - Compliance with Regulatory Capital Requirements under Banking Regulations (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jan. 01, 2017	Jan. 01, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total risk-based capital, Ratio	15.20%
Tier 1 risk-based capital, Ratio	13.90%
Tier 1 leverage capital, Ratio	11.90%
CET 1 capital, Ratio	13.90%
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 to Risk Weighted Assets, Capital Conservation Buffer, Phased in	1.875%		0.625%	0.625%
Common Equity Tier 1 to Risk Weighted Assets, Capital Conservation Buffer	2.50%
Total risk-based capital, Amount	$ 143,480	$ 133,967
Total risk-based capital, Ratio	15.57%	16.25%
Total risk-based capital, For Capital Adequacy Purposes, Amount	$ 73,699	$ 65,965
Total risk-based capital, For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Total risk-based capital, For Capital Adequacy with Capital Buffer, Amount	$ 91,018	$ 76,272
Total risk-based capital, For Capital Adequacy with Capital Buffer, Ratio	9.88%	9.25%
Total risk-based capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 92,124	$ 82,456
Total risk-based capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 risk-based capital, Amount	$ 131,961	$ 123,651
Tier 1 risk-based capital, Ratio	14.32%	15.00%
Tier 1 risk-based capital, For Capital Adequacy Purposes, Amount	$ 55,274	$ 49,474
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	$ 72,594	$ 59,781
Tier 1 risk-based capital, For Capital Adequacy with Capital Buffer, Ratio	7.88%	7.25%
Tier 1 risk-based capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 73,699	$ 65,965
Tier 1 risk-based capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%	8.00%
Tier 1 leverage capital	$ 131,961	$ 123,651
Tier 1 leverage capital, Ratio	12.23%	12.61%
Tier 1 leverage capital, For Capital Adequacy Purposes, Amount	$ 43,157	$ 39,233
Tier 1 leverage capital, For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier 1 leverage capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 53,946	$ 49,041
Tier 1 leverage capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%
CET 1 capital, Amount	$ 131,961	$ 123,651
CET 1 capital, Ratio	14.32%	15.00%
CET 1 capital, For Capital Adequacy Purposes, Amount	$ 41,456	$ 37,105
CET 1 capital, For Capital Adequacy Purposes, Ratio	4.50%	4.50%
CET 1 capital, For Capital Adequacy with Capital Buffer, Amount	$ 64,487	$ 47,412
CET 1 capital, For Capital Adequacy with Capital Buffer, Ratio	7.00%	5.75%
CET 1 capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 59,881	$ 53,597
CET 1 capital, To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%	6.50%

Business Segments - Narrative (

Business Segments - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)segmentitem	Dec. 31, 2017USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment	2
Reporting Unit, Name of Segment [Extensible List]	fsbw:CommercialAndConsumerBankingMember
Total deposits | $	$ 870,113	$ 829,842
Retail Deposit | Pacific Northwest
Segment Reporting Information [Line Items]
Number of bank branches | item	13

Business Segments - Segment Fin

Business Segments - Segment Financial Results (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)employee	Jun. 30, 2017USD ($)employee	Jun. 30, 2018USD ($)employee	Jun. 30, 2017USD ($)employee
Segment Reporting Information [Line Items]
Net interest income	$ 11,925	$ 9,966	$ 23,422	$ 18,941
Provision for loan losses	(450)	0	(800)	0
Noninterest income	5,614	6,957	10,638	12,377
Noninterest expense	(12,144)	(10,944)	(23,179)	(21,321)
INCOME BEFORE PROVISION FOR INCOME TAXES	4,945	5,979	10,081	9,997
Provision for income taxes	(688)	(1,620)	(1,502)	(3,045)
NET INCOME	4,257	4,359	8,579	6,952
Total average assets at quarter end	$ 1,082,862	$ 902,483	$ 1,049,972	$ 870,793
FTEs | employee	336	324	336	324
Home Lending
Segment Reporting Information [Line Items]
Net interest income	$ 764	$ 415	$ 1,479	$ 1,045
Provision for loan losses	(149)	(117)	(145)	(197)
Noninterest income	4,447	5,462	8,213	9,849
Noninterest expense	(4,508)	(4,382)	(8,564)	(8,399)
INCOME BEFORE PROVISION FOR INCOME TAXES	554	1,378	983	2,298
Provision for income taxes	(78)	(374)	(146)	(700)
NET INCOME	476	1,004	837	1,598
Total average assets at quarter end	$ 222,687	$ 197,431	$ 219,553	$ 184,499
FTEs | employee	117	117	117	117
Commercial and Consumer Banking
Segment Reporting Information [Line Items]
Net interest income	$ 11,161	$ 9,551	$ 21,943	$ 17,896
Provision for loan losses	(301)	117	(655)	197
Noninterest income	1,167	1,495	2,425	2,528
Noninterest expense	(7,636)	(6,562)	(14,615)	(12,922)
INCOME BEFORE PROVISION FOR INCOME TAXES	4,391	4,601	9,098	7,699
Provision for income taxes	(610)	(1,246)	(1,356)	(2,345)
NET INCOME	3,781	3,355	7,742	5,354
Total average assets at quarter end	$ 860,175	$ 705,052	$ 830,419	$ 686,294
FTEs | employee	219	207	219	207

Goodwill And Other Intangible79

Goodwill And Other Intangible Assets (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 2,312,000		$ 2,312,000		$ 2,312,000
Goodwill, Impairment Loss					0
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Gross	2,239,000		2,239,000		2,239,000	$ 2,239,000
FiniteLivedIntangibleAssetsAccumulatedAmortization	(1,075,000)		(1,075,000)		(922,000)	(522,000)
Amortization of Intangible Assets	77,000	$ 100,000	153,000	$ 200,000	400,000
Finite-Lived Intangible Assets, Net	1,164,000		1,164,000		1,317,000	1,717,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2018	154,000		154,000
2,019	235,000		235,000
2,020	181,000		181,000
2,021	166,000		166,000
2,022	166,000		166,000
Thereafter	262,000		262,000
Total	$ 1,164,000		$ 1,164,000		$ 1,317,000	$ 1,717,000

Revenue From Contracts With C80

Revenue From Contracts With Customers (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Not in scope noninterest income.	$ 5,200,000	$ 9,900,000
Commercial and Consumer Banking | Deposit Fees [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	574,000	1,100,000
Commercial and Consumer Banking | Debit Card Interchange Fees [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	280,000	540,000
Commercial and Consumer Banking | Non Sufficient Funds Fees [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 116,000	$ 236,000

Definitive Agreement (Details)

Definitive Agreement (Details)	Jul. 17, 2018USD ($)itemshares	Jul. 13, 2018$ / shares	Dec. 31, 2018	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Business Acquisition [Line Items]
Number of days included in volume weighted average closing price		10 days
Termination fee				$ 2,700,000
Total assets				1,132,542,000	$ 981,783,000
Total loans				881,200,000	761,558,000
Total deposits				870,113,000	$ 829,842,000
Anchor Bancorp
Business Acquisition [Line Items]
Number of bank branches | item	9
Number of loan production offices | item	1
Share Price | $ / shares		$ 63.68
Anchor Bancorp
Business Acquisition [Line Items]
Total assets				469,600,000
Total loans				397,400,000
Total deposits				$ 359,000,000
Forecast | Anchor Bancorp
Business Acquisition [Line Items]
Shares consideration | shares	725,585
Business acquisition exchange ratio | shares	0.2921
Cash for each share of Anchor common stock	$ 12.40
Cash consideration paid	30,800,000
Aggregate consideration paid	$ 77,000,000
Anchor Shareholders | Forecast
Business Acquisition [Line Items]
Percentage ownership in combined company (as a percent)			16.00%