Sound Financial Bancorp (SFBC) 10-Q 9 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 07, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	Sound Financial Bancorp, Inc.
Entity Central Index Key	1,541,119
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		2,539,814
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 62,292	$ 60,680
Available-for-sale securities, at fair value	5,011	5,435
Loans held-for-sale	695	1,777
Loans held-for-portfolio	617,230	548,595
Allowance for loan losses	(5,748)	(5,241)
Total loans held-for-portfolio, net	611,482	543,354
Accrued interest receivable	2,204	1,977
Bank-owned life insurance ("BOLI"), net	13,304	12,750
Other real estate owned ("OREO") and repossessed assets, net	600	610
Mortgage servicing rights, at fair value	3,447	3,426
Federal Home Loan Bank ("FHLB") stock, at cost	4,634	3,065
Premises and equipment, net	7,255	7,392
Other assets	4,399	4,778
Total assets	715,323	645,244
Deposits
Interest-bearing	439,923	442,277
Noninterest-bearing demand	99,909	72,123
Total deposits	539,832	514,400
Borrowings	96,500	59,000
Accrued interest payable	93	77
Other liabilities	7,636	5,972
Advance payments from borrowers for taxes and insurance	1,132	635
Total liabilities	645,193	580,084
COMMITMENTS AND CONTINGENCIES (NOTE 7)
STOCKHOLDERS' EQUITY
Preferred stock, $0.01 par value, 10,000,000 shares authorized, none issued or outstanding	0	0
Common stock, $0.01 par value, 40,000,000 shares authorized, 2,539,814 and 2,511,127 shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively	25	25
Additional paid-in capital	25,523	24,986
Unearned shares - Employee Stock Ownership Plan ("ESOP")	(369)	(453)
Retained earnings	44,879	40,493
Accumulated other comprehensive income, net of tax	72	109
Total stockholders' equity	70,130	65,160
Total liabilities and stockholders' equity	$ 715,323	$ 645,244

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
STOCKHOLDERS' EQUITY
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, shares issued (in shares)	2,539,814	2,511,127
Common stock, shares outstanding (in shares)	2,539,814	2,511,127

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
INTEREST INCOME
Loans, including fees		$ 7,932	$ 6,832	$ 23,077	$ 19,630
Interest and dividends on investments, cash and cash equivalents		378	234	888	544
Total interest income		8,310	7,066	23,965	20,174
INTEREST EXPENSE
Deposits		974	808	2,665	2,199
Borrowings		439	72	993	238
Total interest expense		1,413	880	3,658	2,437
Net interest income		6,897	6,186	20,307	17,737
PROVISION FOR LOAN LOSSES		250	250	500	250
Net interest income after provision for loan losses		6,647	5,936	19,807	17,487
NONINTEREST INCOME
Service charges and fee income		504	439	1,426	1,442
Earnings on cash surrender value of bank-owned life insurance	[1]	149	82	308	245
Mortgage servicing income	[1]	22	18	447	399
Net gain on sale of loans	[1]	333	287	1,008	720
Other income	[1]	490	0	490	0
Total noninterest income		1,498	826	3,679	2,806
NONINTEREST EXPENSE
Salaries and benefits		3,327	2,777	9,523	8,130
Operations		1,280	1,002	3,718	3,052
Regulatory assessments		136	80	328	340
Occupancy		588	520	1,636	1,415
Data processing		528	448	1,442	1,293
Net loss on OREO and repossessed assets		11	109	62	123
Total noninterest expense		5,870	4,936	16,709	14,353
Income before provision for income taxes		2,275	1,826	6,777	5,940
Provision for income taxes		445	604	1,380	2,001
Net income		$ 1,830	$ 1,222	$ 5,397	$ 3,939
Earnings per common share:
Basic (in dollars per share)		$ 0.73	$ 0.49	$ 2.17	$ 1.57
Diluted (in dollars per share)		$ 0.71	$ 0.48	$ 2.10	$ 1.54
Weighted-average number of common shares outstanding:
Basic (in shares)		2,502,959	2,506,863	2,492,738	2,502,399
Diluted (in shares)		2,569,535	2,562,373	2,564,688	2,562,606
[1]	Not within scope of Topic 606

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Condensed Consolidated Statements of Comprehensive Income (unaudited) [Abstract]
Net income	$ 1,830	$ 1,222	$ 5,397	$ 3,939
Available for sale securities:
Unrealized holding (losses)/gains arising during the period	(8)	12	(46)	100
Income tax benefit/(expense) related to unrealized gains/losses	1	(4)	9	(34)
Other comprehensive (loss)/income, net of tax	(7)	8	(37)	66
Comprehensive income	$ 1,823	$ 1,230	$ 5,360	$ 4,005

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Unearned ESOP Shares [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income, Net of Tax [Member]	Total
Balances at Dec. 31, 2016	$ 25	$ 23,979	$ (683)	$ 36,873	$ 81	$ 60,275
Balances (in shares) at Dec. 31, 2016	2,498,804
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				3,939		3,939
Other comprehensive income (loss), net of tax					66	66
Share-based compensation		285				285
Cash dividends paid on common stock				(1,254)		(1,254)
Common stock surrendered (in shares)	(3,353)
Restricted stock awards issued						0
Restricted stock awards issued (in shares)	576
Exercise of options		33				33
Exercise of options (in shares)	14,018
Balances at Sep. 30, 2017	$ 25	24,297	(683)	39,558	147	63,344
Balances (in shares) at Sep. 30, 2017	2,510,045
Balances at Dec. 31, 2017	$ 25	24,986	(453)	40,493	109	$ 65,160
Balances (in shares) at Dec. 31, 2017	2,511,127					2,511,127
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				5,397		$ 5,397
Other comprehensive income (loss), net of tax					(37)	(37)
Share-based compensation		201				201
Cash dividends paid on common stock				(1,011)		(1,011)
Common stock surrendered						0
Common stock surrendered (in shares)	(15,990)
Restricted shares forfeited						0
Restricted shares forfeited (in shares)	(343)
Exercise of options		102				102
Exercise of options (in shares)	45,020
Allocation of ESOP shares		234	84			318
Balances at Sep. 30, 2018	$ 25	$ 25,523	$ (369)	$ 44,879	$ 72	$ 70,130
Balances (in shares) at Sep. 30, 2018	2,539,814					2,539,814

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Stockholders' Equity (unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Condensed Consolidated Statements of Stockholders' Equity (unaudited) [Abstract]
Cash dividends paid on common stock (in dollars per share)	$ 0.40	$ 0.50

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income		$ 5,397	$ 3,939
Adjustments to reconcile net income to net cash from operating activities:
Amortization of net premiums on investments		(31)	(16)
Provision for loan losses		500	250
Depreciation and amortization		745	706
Compensation expense related to stock options and restricted stock		201	285
Change in fair value of mortgage servicing rights		381	191
Increase in cash surrender value of BOLI		(240)	(245)
Net change in advances from borrowers for taxes and insurance		497	428
Net gain on sale of loans	[1]	(1,008)	(720)
Proceeds from sale of loans held-for-sale		39,739	35,818
Originations of loans held-for-sale		(38,314)	(34,536)
Net loss on OREO and repossessed assets		62	123
Change in operating assets and liabilities:
Accrued interest receivable		(227)	(127)
Other assets		379	(482)
Accrued interest payable		16	(5)
Other liabilities		1,664	367
Net cash provided by operating activities		9,761	5,976
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from principal payments, maturities and sales of available-for-sale securities		455	1,032
Net (increase)/decrease in loans		(68,635)	(28,505)
Purchase of BOLI		(315)	(275)
Purchases of premises and equipment, net		(608)	(2,495)
Proceeds from sale of OREO and other repossessed assets		0	248
Net cash received from branch acquisition		0	13,671
Net cash (used in)/provided by investing activities		(69,103)	(16,324)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in deposits		25,432	43,415
Proceeds from borrowings		198,000	137,000
Repayment of borrowings		(160,000)	(163,792)
FHLB stock (purchased)/redeemed		(1,569)	1,015
Dividends paid on common stock		(1,011)	(1,254)
Proceeds from stock option exercises		102	33
Net cash provided/(used in) by financing activities		60,954	16,417
Net change in cash and cash equivalents		1,612	6,069
Cash and cash equivalents, beginning of period		60,680	54,582
Cash and cash equivalents, end of period		62,292	60,651
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for income taxes		2,200	1,910
Interest paid on deposits and borrowings		3,674	2,442
Assets acquired in acquisition of branch		$ 0	$ 14,474
[1]	Not within scope of Topic 606

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2018
Basis of Presentation [Abstract]
Basis of Presentation	Note 1 – Basis of Presentation The accompanying financial information is unaudited and has been prepared from the consolidated financial statements of Sound Financial Bancorp, Inc., and its wholly owned subsidiary, Sound Community Bank. References in this document to Sound Financial Bancorp refer to Sound Financial Bancorp, Inc. and references to the "Bank" refer to Sound Community Bank. References to "we," "us," and "our" or the "Company" refers to Sound Financial Bancorp and its wholly-owned subsidiary, Sound Community Bank, unless the context otherwise requires. These unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("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"). In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. Certain information and disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. These unaudited financial statements should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2017, as filed with the SEC on March 27, 2018 ("2017 Form 10-K"). The results for the interim periods are not necessarily indicative of results for a full year. Certain amounts in the prior period's consolidated financial statements have been reclassified to conform to the current presentation. These classifications do not have an impact on previously reported consolidated net income, retained earnings, stockholders' equity or earnings per share.

Accounting Pronouncements Recen

Accounting Pronouncements Recently Issued or Adopted	9 Months Ended
	Sep. 30, 2018
Accounting Pronouncements Recently Issued or Adopted [Abstract]
Accounting Pronouncements Recently Issued or Adopted	Note 2 – Accounting Pronouncements Recently Issued or Adopted Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606) In January 2016, FASB issued ASU No. 2016-01, Financial Instruments - Overall, Recognition and Measurement of Financial Assets and Financial Liabilities . ASU 2016-01 requires equity investments (except those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income. In addition, the amendments in this ASU require an entity to disclose the fair value of financial instruments using the exit price notion. 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. The amendments in this ASU were effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company has used the exit price notion in the fair value disclosure of financial instruments in Note 5 of this report. The adoption of ASU 2016-01 did not have a material impact on the Company's consolidated financial statements. In February 2016, FASB issued ASU No. 2016-02, Leases (Topic 842) Leases (Topic 842), Targeted Improvements Although an estimate of the impact of the new leasing standard has not yet been determined, 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. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments- Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments In August 2016, FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments In March 2017, the FASB issued ASU 2017-08, Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20) In May 2017, the FASB issued ASU No. 2017-09, Compensation--Stock Compensation (Topic 718): Scope of Modification Accounting In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. In February 2018, FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220) In March 2018, FASB issued ASU No. 2018-05, Income Taxes (Topic 740) In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting. In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurement: Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement" ("ASU 2018-13"). This ASU modifies the disclosure requirements on fair value measurements. The following disclosure requirements were removed from FASB Accounting Standards Codification ("ASC") Topic 820 – Fair Value Measurement: (1) the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy; (2) the policy for timing of transfers between levels; and (3) the valuation processes for Level 3 fair value measurements. This ASU clarifies that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. The ASU adds the following disclosure requirements for Level 3 measurements: (1) changes in unrealized gains and losses for the period included in other comprehensive income for the recurring Level 3 fair value measurements held at the end of the reporting period; and (2) the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. Amendments in this ASU are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for any removed or modified disclosures. The adoption of ASU 2018-13 is not expected to have a material impact on the Company's consolidated financial statements.

Investments

Investments	9 Months Ended
	Sep. 30, 2018
Investments [Abstract]
Investments	Note 3 – Investments The amortized cost and fair value of our available-for-sale ("AFS") securities and the corresponding amounts of gross unrealized gains and losses at the dates indicated were as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value September 30, 2018 Municipal bonds $ 3,224 $ 111 $ (29 ) $ 3,306 Agency mortgage-backed securities 1,668 39 (2 ) 1,705 Total $ 4,892 $ 150 $ (31 ) $ 5,011 December 31, 2017 Municipal bonds $ 3,240 $ 155 $ (26 ) $ 3,369 Agency mortgage-backed securities 2,030 36 — 2,066 Total $ 5,270 $ 191 $ (26 ) $ 5,435 The amortized cost and fair value of AFS securities at September 30, 2018, by contractual maturity, are shown below (in thousands). Expected maturities of AFS securities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Investments not due at a single maturity date, primarily mortgage-backed investments, are shown separately. September 30, 2018 Amortized Cost Fair Value Due after one year through five years $ 1,571 $ 1,547 Due after five years through ten years 153 160 Due after ten years 1,500 1,599 Mortgage-backed securities 1,668 1,705 Total $ 4,892 $ 5,011 There were no pledged securities at September 30, 2018 and December 31, 2017. There were no sales of AFS securities during the three and nine months ended September 30, 2018 and 2017. The following tables summarize the aggregate fair value and gross unrealized loss by length of time of those investments that have been in a continuous unrealized loss position at the dates indicated (in thousands): September 30, 2018 Less Than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Municipal bonds $ — $ — $ 1,282 $ (29 ) $ 1,282 $ (29 ) Agency mortgage-backed securities 235 (2 ) — — 235 (2 ) Total $ 235 $ (2 ) $ 1,282 $ (29 ) $ 1,517 $ (31 ) December 31, 2017 Less Than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Municipal bonds $ — $ — $ 1,302 $ (26 ) $ 1,302 $ (26 ) Total $ — $ — $ 1,302 $ (26 ) $ 1,302 $ (26 ) There were no credit losses recognized in earnings during the three and nine months ended September 30, 2018 or 2017 relating to the Company's securities. At September 30, 2018, there was one security in an unrealized loss position for less than 12 months and there were three municipal securities in an unrealized loss position for over 12 months. At December 31, 2017, there were no securities in an unrealized loss position for less than 12 months and there were three municipal securities in an unrealized loss position for more than 12 months. The unrealized losses were caused by changes in market interest rates or the widening of market spreads subsequent to the initial purchase of these securities, and not related to the underlying credit of the issuers or the underlying collateral. It is expected that these securities will not be settled at a price less than the amortized cost of each investment. Because the decline in fair value is attributable to changes in interest rates or widening market spreads and not credit quality, and because we do not intend to sell the securities in this class and it is not likely that we will be required to sell these securities before recovery of their amortized cost basis, which may include holding each security until contractual maturity, the unrealized losses on these investments are not considered an other-than-temporary impairment ("OTTI") during the three and nine months ended September 30, 2018 and 2017.

Loans

Loans	9 Months Ended
	Sep. 30, 2018
Loans [Abstract]
Loans	Note 4 – Loans The composition of the loans-held-for portfolio at the dates indicated, excluding loans held-for-sale, was as follows (in thousands): September 30, 2018 December 31, 2017 Real estate loans: One-to-four family $ 170,509 $ 157,417 Home equity 28,525 28,379 Commercial and multifamily 254,050 211,269 Construction and land 60,877 61,482 Total real estate loans $ 513,961 $ 458,547 Consumer loans: Manufactured homes 19,448 17,111 Floating homes 41,377 29,120 Other consumer 5,026 4,902 Total consumer loans 65,851 51,133 Commercial business loans 39,681 40,829 Total loans held-for-portfolio 619,493 550,509 Deferred fees (2,263 ) (1,914 ) Total loans, gross held-for-portfolio 617,230 548,595 Allowance for loan losses (5,748 ) (5,241 ) Total loans held-for-portfolio, net $ 611,482 $ 543,354 The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2018 (in thousands): One-to-four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 363 $ 30 $ — $ 9 $ 295 $ — $ 69 $ 179 $ — $ 945 Collectively evaluated for impairment 1,076 180 1,631 379 124 269 38 240 866 4,803 Ending balance $ 1,439 $ 210 $ 1,631 $ 388 $ 419 $ 269 $ 107 $ 419 $ 866 $ 5,748 Loans hed-for-portfolio: Individually evaluated for impairment $ 4,932 $ 823 $ 3,274 $ 2,484 $ 425 $ — $ 163 $ 2,883 $ — $ 14,984 Collectively evaluated for impairment 165,577 27,702 250,776 58,393 19,023 41,377 4,863 36,798 — 604,509 Ending balance $ 170,509 $ 28,525 $ 254,050 $ 60,877 $ 19,448 $ 41,377 $ 5,026 $ 39,681 $ — $ 619,493 The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of December 31, 2017 (in thousands): One-to-four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 555 $ 120 $ — $ 13 $ 258 $ — $ 43 $ 135 $ — $ 1,124 Collectively evaluated for impairment 881 173 1,250 365 97 169 37 237 908 4,117 Ending balance $ 1,436 $ 293 $ 1,250 $ 378 $ 355 $ 169 $ 80 $ 372 $ 908 $ 5,241 Loans held-for-portfolio: Individually evaluated for impairment $ 6,256 $ 1,028 $ 1,699 $ 141 $ 385 $ — $ 194 $ 1,000 $ — $ 10,703 Collectively evaluated for impairment 151,161 27,351 209,570 61,341 16,726 29,120 4,708 39,829 — 539,806 Ending balance $ 157,417 $ 28,379 $ 211,269 $ 61,482 $ 17,111 $ 29,120 $ 4,902 $ 40,829 $ — $ 550,509 The following table summarizes the activity in the allowance for loan losses for the three months ended September 30, 2018 (in thousands): Beginning Allowance Charge-offs Recoveries Provision Ending Allowance One-to-four family $ 1,579 $ — $ — $ (140 ) $ 1,439 Home equity 211 — 3 (4 ) 210 Commercial and multifamily 1,401 — — 230 1,631 Construction and land 385 — — 3 388 Manufactured homes 326 — — 93 419 Floating homes 195 — — 74 269 Other consumer 116 (11 ) 3 (1 ) 107 Commercial business 553 — — (134 ) 419 Unallocated 737 — — 129 866 Total $ 5,503 $ (11 ) $ 6 $ 250 $ 5,748 The following table summarizes the activity in the allowance for loan losses for the nine months ended September 30, 2018 (in thousands): Beginning Allowance Charge-offs Recoveries Provision Ending Allowance One-to-four family $ 1,436 $ — $ 1 $ 2 $ 1,439 Home equity 293 (7 ) 41 (117 ) 210 Commercial and multifamily 1,250 — — 381 1,631 Construction and land 378 — — 10 388 Manufactured homes 355 (12 ) — 76 419 Floating homes 169 — — 100 269 Other consumer 80 (24 ) 8 43 107 Commercial business 372 — — 47 419 Unallocated 908 — — (42 ) 866 Total $ 5,241 $ (43 ) $ 50 $ 500 $ 5,748 The following table summarizes the activity in the allowance for loan losses for the three months ended September 30, 2017 (in thousands): Beginning Allowance Charge-offs Recoveries Provision Ending Allowance One-to-four family $ 1,302 $ — $ — $ (51 ) $ 1,251 Home equity 431 (89 ) 1 8 351 Commercial and multifamily 1,153 — — 32 1,185 Construction and land 352 — — 7 359 Manufactured homes 178 (7 ) — 9 180 Floating homes 146 — — 8 154 Other consumer 98 (1 ) 2 (1 ) 98 Commercial business 364 — — 143 507 Unallocated 811 — — 95 906 Total $ 4,835 $ (97 ) $ 3 $ 250 $ 4,991 The following table summarizes the activity in the allowance for loan losses for the nine months ended September 30, 2017 (in thousands): Beginning Allowance Charge-offs Recoveries Provision Ending Allowance One-to-four family $ 1,542 $ — $ — $ (291 ) $ 1,251 Home equity 378 (89 ) 30 32 351 Commercial and multifamily 1,144 (24 ) 1 64 1,185 Construction and land 459 — — (100 ) 359 Manufactured homes 168 (13 ) 3 22 180 Floating homes 132 — — 22 154 Other consumer 112 (8 ) 19 (25 ) 98 Commercial business 175 — — 332 507 Unallocated 712 — — 194 906 Total $ 4,822 $ (134 ) $ 53 $ 250 $ 4,991 Credit Quality Indicators. Federal regulations provide for the classification of lower quality loans as substandard, doubtful or loss. An asset is considered substandard if it is inadequately protected by the current net worth and payment capacity of the borrower or of any collateral pledged. Substandard assets include those characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected. Assets classified as doubtful . Assets classified as loss are those considered uncollectible and of such little value that their continuance as assets without establishment of a specific loss reserve is not warranted. When we classify problem loans as either substandard or doubtful, we may establish a specific allowance in an amount we deem prudent to address the risk specifically (if the loan is impaired) or we may allow the loss to be addressed in the general allowance (if the loan is not impaired). General allowances represent loss reserves which have been established to recognize the inherent risk associated with lending activities, but which, unlike specific allowances, have not been specifically allocated to particular problem loans. When the Company classifies problem loans as a loss, we charge-off such assets in the period in which they are deemed uncollectible. Assets that do not currently expose us to sufficient risk to warrant classification as substandard, doubtful or loss, but possess identified weaknesses, are classified as either watch or special mention assets. Our determination as to the classification of our assets and the amount of our valuation allowances is subject to review by the Federal Deposit Insurance Corporation ("FDIC"), the Bank's federal regulator, and the Washington Department of Financial Institutions ("WDFI"), the Bank's state banking regulator, both which can order the establishment of additional loss allowances. Pass rated loans are loans that are not otherwise classified or criticized. The following table represents the internally assigned grades as of September 30, 2018, by type of loan (in thousands): One-to- four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Total Grade: Pass $ 164,281 $ 27,995 $ 248,917 $ 58,438 $ 19,158 $ 41,377 $ 4,972 $ 37,095 $ 602,233 Watch 4,484 — 2,028 — 55 — — 839 7,406 Special Mention — — 1,458 2,362 — — — 476 4,296 Substandard 1,744 530 1,647 77 235 — 54 1,271 5,558 Doubtful — — — — — — — — — Loss — — — — — — — — — Total $ 170,509 $ 28,525 $ 254,050 $ 60,877 $ 19,448 $ 41,377 $ 5,026 $ 39,681 $ 619,493 The Bank had $3.3 million in performing loans identified as TDRs at September 30, 2018, that were not classified as special mention or substandard. The following table represents the internally assigned grades as of December 31, 2017, by type of loan (in thousands): One-to- four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Total Grade: Pass $ 153,793 $ 27,493 $ 199,887 $ 61,390 $ 16,877 $ 29,120 $ 4,708 $ 39,089 $ 532,357 Watch 244 — 9,683 — — — — 827 10,754 Special Mention 137 — 357 — — — — 784 1,278 Substandard 3,243 886 1,342 92 234 — 194 129 6,120 Doubtful — — — — — — — — — Loss — — — — — — — — — Total $ 157,417 $ 28,379 $ 211,269 $ 61,482 $ 17,111 $ 29,120 $ 4,902 $ 40,829 $ 550,509 Nonaccrual and Past Due Loans The following table presents the recorded investment in nonaccrual loans as of September 30, 2018, and December 31, 2017, by type of loan (in thousands): September 30, 2018 December 31, 2017 One-to-four family $ 824 $ 791 Home equity 384 722 Commercial and multifamily 539 201 Construction and land 76 92 Manufactured homes 223 206 Floating homes — — Other consumer 4 8 Commercial business 334 129 Total $ 2,384 $ 2,149 The following table represents the aging of the recorded investment in past due loans as of September 30, 2018, by type of loan (in thousands): 30-59 Days Past Due 60-89 Days Past Due 90 Days and Greater Past Due Total Past Due Current Total Loans One-to-four family $ — $ 222 $ 419 $ 641 $ 169,868 $ 170,509 Home equity 49 66 305 420 28,105 28,525 Commercial and multifamily 671 — 353 1,024 253,026 254,050 Construction and land — — — — 60,877 60,877 Manufactured homes — 6 205 211 19,237 19,448 Floating homes — — — — 41,377 41,377 Other consumer 8 1 — 9 5,017 5,026 Commercial business 323 67 — 390 39,291 39,681 Total $ 1,051 $ 362 $ 1,282 $ 2,695 $ 616,798 $ 619,493 The following table represents the aging of the recorded investment in past due loans as of December 31, 2017, by type of loan (in thousands): 30-59 Days Past Due 60-89 Days Past Due 90 Days and Greater Past Due Total Past Due Current Total Loans One-to-four family $ 2,092 $ 1,819 $ 727 $ 4,638 $ 152,779 $ 157,417 Home equity 521 5 633 1,159 27,220 28,379 Commercial and multifamily 313 — — 313 210,956 211,269 Construction and land 51 — 92 143 61,339 61,482 Manufactured homes 185 50 197 432 16,679 17,111 Floating homes — — — — 29,120 29,120 Other consumer 15 — — 15 4,887 4,902 Commercial business 400 — — 400 40,429 40,829 Total $ 3,577 $ 1,874 $ 1,649 $ 7,100 $ 543,409 $ 550,509 Nonperforming Loans. The following table represents the credit risk profile of our loan portfolio based on payment activity as of September 30, 2018, by type of loan (in thousands): One-to-four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Total Performing $ 169,640 $ 28,141 $ 253,511 $ 60,801 $ 19,225 $ 41,377 $ 5,022 $ 39,264 $ 616,981 Nonperforming 869 384 539 76 223 — 4 417 2,512 Total $ 170,509 $ 28,525 $ 254,050 $ 60,877 $ 19,448 $ 41,377 $ 5,026 $ 39,681 $ 619,493 The following table represents the credit risk profile of our loan portfolio based on payment activity as of December 31, 2017, by type of loan (in thousands): One-to-four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Total Performing $ 156,580 $ 27,657 $ 211,068 $ 61,390 $ 16,905 $ 29,120 $ 4,894 $ 40,612 $ 548,226 Nonperforming 837 722 201 92 206 — 8 217 2,283 Total $ 157,417 $ 28,379 $ 211,269 $ 61,482 $ 17,111 $ 29,120 $ 4,902 $ 40,829 $ 550,509 Impaired Loans. Impaired loans at September 30, 2018 and December 31, 2017, by type of loan were as follows (in thousands): September 30, 2018 Recorded Investment Unpaid Principal Balance Without Allowance With Allowance Total Recorded Investment Related Allowance One-to-four family $ 5,066 $ 1,934 $ 2,998 $ 4,932 $ 363 Home equity 903 662 161 823 30 Commercial and multifamily 3,274 3,274 — 3,274 — Construction and land 2,484 2,444 40 2,484 9 Manufactured homes 431 — 425 425 295 Floating homes — — — — — Other consumer 163 — 163 163 69 Commercial business 2,883 2,296 587 2,883 179 Total $ 15,204 $ 10,610 $ 4,374 $ 14,984 $ 945 December 31, 2017 Recorded Investment Unpaid Principal Balance Without Allowance With Allowance Total Recorded Investment Related Allowance One-to-four family $ 6,562 $ 3,197 $ 3,059 $ 6,256 $ 555 Home equity 1,149 677 351 1,028 120 Commercial and multifamily 1,722 1,699 — 1,699 — Construction and land 141 100 41 141 13 Manufactured homes 409 23 362 385 258 Floating homes — — — — — Other consumer 194 125 69 194 43 Commercial business 1,017 784 216 1,000 135 Total $ 11,194 $ 6,605 $ 4,098 $ 10,703 $ 1,124 The following tables provide the average recorded investment and interest income recognized on impaired loans for the three and nine months ended September 30, 2018 and 2017, respectively, by loan types (in thousands): Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized One-to-four family $ 4,826 $ 72 $ 6,603 $ 117 Home equity 807 10 1,008 10 Commercial and multifamily 3,204 46 1,732 24 Construction and land 1,305 86 114 (1 ) Manufactured homes 386 11 306 9 Other consumer 163 2 58 1 Commercial business 2,338 69 348 5 Total $ 13,029 $ 296 $ 10,169 $ 165 Nine Months Ended September 30, 2018 Nine Months Ended September 30, 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized One-to-four family $ 5,594 $ 180 $ 5,718 $ 269 Home equity 926 25 921 30 Commercial and multifamily 2,487 134 1,652 72 Construction and land 1,313 93 91 2 Manufactured homes 405 27 311 19 Other consumer 179 7 60 3 Commercial business 1,942 125 487 16 Total $ 12,846 $ 591 $ 9,240 $ 411 Forgone interest on nonaccrual loans was $24,000 and $12,000 for the nine months ended September 30, 2018 and 2017, respectively. There were no commitments to lend additional funds to borrowers whose loans were classified as nonaccrual or impaired at September 30, 2018 and December 31, 2017. Troubled debt restructurings. Rate Modification Term Modification Payment Modification Combination Modification There were four loans, totalling $506,000 that were modified as TDRs and oneTDR loan of $16,000 paid off during the nine months ended September 30, 2018, compared to one $1.3 million one-to-four family residential loan modified as a TDR during the nine months ended September 30, 2017. The following TDR loans paid off during the first nine months of 2017: a $125,000 one-to-four family residential loan, a $14,000 manufactured home loan, one $86,000 home equity loan, a $27,000 land loan, and a $359,000 commercial/multifamily loan. There were no post-modification changes for the unpaid principal balance in loans, net of partial charge-offs, that were recorded as a result of the TDRs for the nine months ended September 30, 2018 and 2017. There were no TDRs for which there was a payment default within the first 12 months of modification during the nine months ended September 30, 2018 and 2017. The Company had no commitments to extend additional credit to borrowers owing receivables whose terms have been modified in TDRs.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
Fair Value Measurements [Abstract]
Fair Value Measurements	Note 5 – Fair Value Measurements 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 The Company determines the fair values of its financial instruments based on the requirements established in Accounting Standards Codification ("ASC") 820, Fair Value Measurements The following methods and assumptions were used to estimate the fair value of other financial instruments: Cash and cash equivalents Available-for-Sale Securities Loans Held-for-Sale Loans Held-for-Portfolio - Mortgage Servicing Rights FHLB stock Non-maturity deposits - Time deposits Borrowings A description of the valuation methodologies used for impaired loans and OREO is as follows: Impaired Loans OREO and Repossessed Assets Off-balance sheet financial instruments The following tables present information about the level in the fair value hierarchy for the Company's financial assets and liabilities, whether or not recognized or recorded at fair value as of September 30, 2018 and December 31, 2017 (in thousands): September 30, 2018 Fair Value Measurements Using: Carrying Value Estimated Fair Value Level 1 Level 2 Level 3 FINANCIAL ASSETS: Cash and cash equivalents $ 62,292 $ 62,292 $ 62,292 $ — $ — Available-for-sale securities 5,011 5,011 — 5,011 — Loans held-for-sale 695 695 — 695 — Loans held-for-portfolio (1) 611,482 613,595 — — 613,595 Mortgage servicing rights 3,447 3,447 — — 3,447 FHLB stock 4,634 4,634 — — 4,634 FINANCIAL LIABILITIES: Non-maturity deposits 366,691 366,691 — 366,691 — Time deposits (1) 173,141 173,276 — 173,276 — Borrowings 96,500 96,500 — 96,500 — December 31, 2017 Fair Value Measurements Using: Carrying Value Estimated Fair Value Level 1 Level 2 Level 3 FINANCIAL ASSETS: Cash and cash equivalents $ 60,680 $ 60,680 $ 60,680 $ — $ — Available-for-sale securities 5,435 5,435 — 5,435 — Loans held-for-sale 1,777 1,777 — 1,777 — Loans held-for-portfolio (1) 543,354 543,400 — — 543,400 Mortgage servicing rights 3,426 3,426 — — 3,426 FHLB stock 3,065 3,065 — — 3,065 FINANCIAL LIABILITIES: Non-maturity deposits 349,846 349,846 — 349,846 — Time deposits (1) 164,554 163,485 — 163,485 — Borrowings 59,000 59,000 — 59,000 — (1) The following tables present the balance of assets measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017 (in thousands): Fair Value at September 30, 2018 Description Total Level 1 Level 2 Level 3 Municipal bonds $ 3,306 $ — $ 3,306 $ — Agency mortgage-backed securities 1,705 — 1,705 — Mortgage servicing rights 3,447 — — 3,447 Fair Value at December 31, 2017 Description Total Level 1 Level 2 Level 3 Municipal bonds $ 3,369 $ — $ 3,369 $ — Agency mortgage-backed securities 2,066 — 2,066 — Mortgage servicing rights 3,426 — — 3,426 The following tables provide a description of the valuation technique, unobservable input, and qualitative information about the unobservable inputs for the Company's assets and liabilities classified as Level 3 and measured at fair value on a recurring basis at September 30, 2018 and December 31, 2017: September 30, 2018 Financial Instrument Valuation Technique Unobservable Input(s) Range (Weighted-Average) Mortgage Servicing Rights Discounted cash flow Prepayment speed assumption 80%-550% (130%) Discount rate 13%-14% (13%) December 31, 2017 Financial Instrument Valuation Technique Unobservable Input(s) Range (Weighted-Average) Mortgage Servicing Rights Discounted cash flow Prepayment speed assumption 103%-412% (160%) Discount rate 13%-15% (13%) Generally, any significant increases in the constant prepayment rate and discount rate utilized in the fair value measurement of the mortgage servicing rights will result in a negative fair value adjustment (and decrease in the fair value measurement). Conversely, a decrease in the constant prepayment rate and discount rate will result in a positive fair value adjustment (and increase in the fair value measurement). An increase in the weighted average life assumptions will result in a decrease in the constant prepayment rate and conversely, a decrease in the weighted-average life will result in an increase of the constant prepayment rate. There were no assets or liabilities (excluding mortgage servicing rights) measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the three and nine months ended September 30, 2018. The following table provides a reconciliation of assets and liabilities (excluding mortgage servicing rights) measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the three and nine months ended September 30, 2017 (in thousands): Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 Beginning balance, at fair value $ 318 $ 347 OTTI impairment losses — — Sales, redemptions and principal payments (318 ) (347 ) Change in unrealized loss — — Ending balance, at fair value $ — $ — Mortgage servicing rights are measured at fair value using a significant unobservable input (Level 3) on a recurring basis - additional information is included in Note 6 – Mortgage Servicing Rights. The following tables present the balance of assets measured at fair value on a nonrecurring basis at the dates indicated (in thousands): Fair Value at September 30, 2018 Total Level 1 Level 2 Level 3 OREO and repossessed assets $ 600 $ — $ — $ 600 Impaired loans 14,984 — — 14,984 Fair Value at December 31, 2017 Total Level 1 Level 2 Level 3 OREO and repossessed assets $ 610 $ — $ — $ 610 Impaired loans 10,703 — — 10,703 There were no liabilities carried at fair value, measured on a recurring or nonrecurring basis, at September 30, 2018 and December 31, 2017. The following tables provide a description of the valuation technique, observable input, and qualitative information about the unobservable inputs for the Company's assets and liabilities classified as Level 3 and measured at fair value on a nonrecurring basis at September 30, 2018 and December 31, 2017: September 30, 2018 Financial Instrument Valuation Technique(s) Unobservable Input(s) Range (Weighted Average) OREO Market approach Adjustment for differences between comparable sales 0-0% (0%) Impaired loans Market approach Adjustment for differences between comparable sales 0-100% (6%) December 31, 2017 Financial Instrument Valuation Technique(s) Unobservable Input(s) Range (Weighted Average) OREO Market approach Adjusted for difference between comparable sales 0-0% (0%) Impaired loans Market approach Adjusted for difference between comparable sales 0-100% (8%)

Mortgage Servicing Rights

Mortgage Servicing Rights	9 Months Ended
	Sep. 30, 2018
Mortgage Servicing Rights [Abstract]
Mortgage Servicing Rights	Note 6 – Mortgage Servicing Rights The unpaid principal balances of loans serviced for Federal National Mortgage Association ("Fannie Mae") at September 30, 2018 and December 31, 2017, totaled $354.4 million and $392.6 million, respectively, and are not included in the Company's financial statements. We also service loans for other financial institutions for which a servicing fee is received. The unpaid principal balances of loans serviced for other financial institutions at September 30, 2018 and December 31, 2017, totaled $7.3 million and $19.9 million, respectively, and are not included in the Company's financial statements. $25.6 million and $31.6 million The key economic assumptions used in determining the fair value of mortgage servicing rights at the dates indicated are as follows: September 30, 2018 December 31, 2017 Prepayment speed (Public Securities Association "PSA" model) 130 % 160 % Weighted-average life 7.5 years 6.9 years Discount rate 13 % 13 % The amounts of contractually specified servicing, late and ancillary fees earned and recorded, net of fair value market adjustments to the mortgage servicing rights, are included in mortgage servicing income on the Condensed Consolidated Statements of Income which were $22,000 and $447,000 for the three and nine months ended September 30, 2018, respectively, and $18,000 and $399,000 for the three and nine months ended September 30, 2017, respectively.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies [Abstract]
Commitments and Contingencies	Note 7 – Commitments and Contingencies In the normal course of operations, the Company engages in a variety of financial transactions that are not recorded in our financial statements. These transactions involve varying degrees of off-balance sheet credit, interest rate and liquidity risks. These transactions are used primarily to manage clients' requests for funding and take the form of loan commitments and lines of credit.

Borrowings and FHLB Stock

Borrowings and FHLB Stock	9 Months Ended
	Sep. 30, 2018
Borrowings and FHLB Stock [Abstract]
Borrowings and FHLB Stock	Note 8 – Borrowings and FHLB Stock The Company utilizes a loan agreement with the FHLB of Des Moines. The terms of the agreement call for a blanket pledge of a portion of the Company's mortgage and commercial and multifamily loan portfolio based on the outstanding balance. At September 30, 2018 and December 31, 2017, the amount available to borrow under this credit facility was $308.5 million and $217.6 million, respectively. At September 30, 2018, the credit facility was collateralized as follows: one-to-four family mortgage loans with an advance equivalent of $126.7 million, commercial and multifamily mortgage loans with an advance equivalent of $117.8 million and home equity loans with an advance equivalent of $12.5 million. At December 31, 2017, the credit facility was collateralized as follows: one-to-four family mortgage loans with an advance equivalent of $111.5 million, commercial and multifamily mortgage loans with an advance equivalent of $103.0 million and home equity loans with an advance equivalent of $15.2 million. The Company had outstanding borrowings under this arrangement of $96.5 million and $59.0 million at September 30, 2018 and December 31, 2017, respectively. The weighted-average interest rate of our borrowings was 1.99% at September 30, 2018 and was 1.63% at December 31, 2017. Additionally, the Company had outstanding letters of credit from the FHLB of Des Moines with a notional amount of $14.5 million both at September 30, 2018 and December 31, 2017, respectively, to secure public deposits. The remaining amount available to borrow as of September 30, 2018 and December 31, 2017, was $146.0 million and $144.1 million, respectively. As a member of the FHLB system, the Bank is required to maintain a minimum level of investment in FHLB of Des Moines stock based on specific percentages of its outstanding FHLB advances. At September 30, 2018 and December 31, 2017, the Company had an investment of $4.6 million and $3.1 million, respectively, in FHLB of Des Moines stock. The Company participates in the Federal Reserve Bank Borrower-in-Custody program, which gives the Company access to the discount window. The terms of the program call for a pledge of specific assets. The Company pledges commercial and consumer loans as collateral for this line of credit. The Company had unused borrowing capacity of $59.1 million and $51.2 million and no outstanding borrowings under this program at September 30, 2018 and December 31, 2017, respectively. The Company has access to an unsecured Fed Funds line of credit from Pacific Coast Banker's Bank. The line has a one-year term maturing on The Company has access to a Fed Funds line of credit from Zions Bank under a Fed Funds Sweep and Line Agreement. The agreement allows access to a Fed Funds line of up to $9.0 million and requires the Company to maintain cash balances with Zions Bank of $250,000. The agreement may be terminated by either party. There was no balance on this line of credit as of September 30, 2018 and December 31, 2017, respectively. The Company has access to an unsecured Fed Funds line of credit from The Independent Bank. As of September 30, 2018, the amount available under this line of credit was $10.0 million. The agreement may be terminated by either party. There was no balance on this line of credit as of September 30, 2018 and December 31, 2017, respectively.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Common Share [Abstract]
Earnings Per Common Share	Note 9 – Earnings Per Common Share Basic earnings per common share is computed by dividing net income by the weighted-average number of common shares outstanding for the period, reduced for average unallocated ESOP shares and average unvested restricted stock awards. Unvested share-based awards containing non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and are included in the computation of earnings per share pursuant to the two-class method, described in the Accounting Standard Codification for Earnings Per Share. Diluted earnings per common share reflect the potential dilution that could occur if securities or other contracts to issue common stock (such as stock awards and options) were exercised or converted to common stock or resulted in the issuance of common stock that then shared in the Company's earnings. Diluted earnings per common share is computed by dividing net income by the weighted-average number of common shares outstanding for the period increased for the dilutive effect of unexercised stock options and unvested restricted stock awards. The dilutive effect of the unexercised stock options and unvested restricted stock awards is calculated under the treasury stock method utilizing the average market value of the Company's stock for the period. Earnings per share are summarized for the periods presented in the following table (in thousands, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Net income $ 1,830 $ 1,222 $ 5,397 $ 3,939 Weighted-average number of shares outstanding, basic 2,503 2,507 2,493 2,502 Effect of potentially dilutive common shares 67 55 72 61 Weighted-average number of shares outstanding, diluted 2,570 2,562 2,565 2,563 Earnings per share, basic $ 0.73 $ 0.49 $ 2.17 $ 1.57 Earnings per share, diluted $ 0.71 $ 0.48 $ 2.10 $ 1.54 There were no anti-dilutive securities at either September 30, 2018 or September 30, 2017.

Stock-based Compensation

Stock-based Compensation	9 Months Ended
	Sep. 30, 2018
Stock-based Compensation [Abstract]
Stock-based Compensation	Note 10 – Stock-based Compensation Stock Options and Restricted Stock The Company currently has two existing Equity Incentive Plans, the 2008 Equity Inventive Plan (the "2008 Plan") and the Amended and Restated 2013 Equity Incentive Plan (the "2013 Plan"), collectively (the "Plans"), both of which were approved by stockholders. The Plans permit the grant of restricted stock, restricted stock units, stock options, and stock appreciation rights. Under the 2008 Plan, 126,287 shares of common stock were approved for awards for stock options and stock appreciation rights and 50,514 shares of common stock were approved for awards for restricted stock and restricted stock units. Under the 2013 Plan, 181,750 116,700 As of September 30, 2018, awards for stock options totaling 258,479 shares and awards for restricted stock totaling 106,870 shares of Company common stock have been granted, net of any forfeitures, to participants in the Plans. Share-based compensation expense was $67,000 and $201,000 for the three and nine months ended September 30, 2018 and was $144,000 and $432,000 for the three and nine months ended September 30, 2017, respectively. Stock Option Awards The stock option awards granted to date under the 2008 Plan vest in 20 percent annual increments commencing one year from the grant date in accordance with the requirements of the 2008 Plan. The stock option awards granted to date under the 2013 Plan vest in equal annual installments of either two or four years. All of the options granted under the Plans are exercisable for a period of 10 years from the date of grant, subject to vesting. The following is a summary of the Company's stock option award activity during the nine months ended September 30, 2018: Shares Weighted- Average Exercise Price Weighted-Average Remaining Contractual Term in Years Aggregate Intrinsic Value Outstanding at January 1, 2018 186,363 $ 18.04 6.26 $ 2,977,279 Granted — — Exercised (45,020 ) 15.44 Forfeited (7,318 ) 18.00 Expired — — Outstanding at September 30, 2018 134,025 18.92 5.86 2,764,915 Exercisable 106,036 18.19 5.63 2,264,936 Expected to vest, assuming a 0% forfeiture rate over the vesting term 27,989 $ 21.69 6.73 $ 499,980 As of September 30, 2018, there was $83,000 of total unrecognized compensation cost related to non-vested stock options granted under the Plans. The cost is expected to be recognized over the remaining weighted-average vesting period of less than one year. There were no stock options granted during nine months ended September 30, 2018. The fair value of options granted for the nine months ended September 30, 2017 was determined using the following weighted-average assumptions as of the grant date. Annual dividend yield 1.28 % Expected volatility 22.99 % Risk-free interest rate 2.20 % Expected term 6.50 years Weighted-average grant date fair value per option granted $ 6.62 Restricted Stock Awards The fair value of the restricted stock awards is equal to the fair value of the Company's stock at the date of grant. Compensation expense is recognized over the vesting period that the awards are based. The restricted stock awards granted to date under the 2008 Plan provide for vesting in 20% annual increments commencing one year from the grant date. The restricted stock awards granted to date under the 2013 Plan provide for immediate vesting of 33.33% of a recipient's award with the balance of an individual's award under the 2013 Plan vesting in two equal annual installments commencing one year from the grant date. The following is a summary of the Company's non-vested restricted stock award activity during the nine months ended September 30, 2018: Shares Weighted-Average Grant-Date Fair Value Per Share Aggregate Intrinsic Value Per Share Non-vested at January 1, 2018 11,785 $ 19.05 Granted — — Vested (10,907 ) 21.94 Forfeited (343 ) 18.36 Expired — — Non-vested at September 30, 2018 535 21.95 $ 39.55 Expected to vest assuming a 0% forfeiture rate over the vesting term 535 $ 21.95 $ 39.55 As of September 30, 2018, there was $12,000 of unrecognized compensation cost related to non-vested restricted stock granted under the Plans. The cost is expected to be recognized over the weighted-average vesting period of 1.0 year. The total fair value of shares vested for the nine months ended September 30, 2018 and 2017 was $239,000 and $430,000, respectively. Employee Stock Ownership Plan In January 2008, the ESOP borrowed $1.2 million from the Company to purchase common stock of the Company which was paid in full in 2017. In August 2012, in conjunction with the Company's conversion to a full stock company from the mutual holding company structure, the ESOP borrowed an additional $1.1 million from the Company to purchase common stock of the Company. The loan is being repaid principally by the Bank through contributions to the ESOP over a period of ten years. The interest rate on the loan is fixed at 2.25%, per annum. As of September 30, 2018, the remaining balance of the ESOP loan was $477,000. Neither the loan balance nor the related interest expense is reflected on the condensed consolidated financial statements. At September 30, 2018, the ESOP was committed to release 11,340 shares of the Company's common stock to participants and held 34,020 unallocated shares remaining to be released in future years. The funds to purchase the shares come from a contribution the Bank makes twice a year to the Plan. For the nine months ended September 30, 2018, the ESOP trustee purchased 6,393 shares of the Company's common stock for inclusion in the Plan. The fair value of the 168,006 restricted shares held by the ESOP trust was $6.6 million at September 30, 2018. ESOP compensation expense included in salaries and benefits was $172,000 and $518,000 for the three and nine months ended September 30, 2018 and was $172,000 and $510,000 for the three and nine months ended September 30, 2017, respectively.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Sep. 30, 2018
Revenue from Contracts with Customers [Abstract]
Revenue from Contracts with Customers	Note 11 – Revenue from Contracts with Customers All of the Company's revenue from contracts with customers in the scope of Topic 606 - Revenue from Contracts with Customers Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Noninterest income: Service charges and fee income Account maintenance fees $ 46 $ 44 $ 146 $ 130 Transaction-based and overdraft service charges 114 102 338 308 Debit/ATM interchange fees 242 230 694 701 Credit card interchange fees 10 4 32 22 Loan fees (a) 76 47 178 235 Other fees (a) 16 12 38 46 Total service charges and fee income 504 439 1,426 1,442 Earnings on cash surrender value of bank-owned life insurance (a) 149 82 308 245 Mortgage servicing income (a) 22 18 447 399 Net gain on sale of loans (a) 333 287 1,008 720 Other income (a) 490 — 490 — Total noninterest income $ 1,498 $ 826 $ 3,679 $ 2,806 (a) Not within scope of Topic 606 Account maintenance fees and transaction-based and overdraft service charges The Company earns fees from its 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 fees are recognized on a monthly basis as the service period is completed. Transaction-based fees on deposit accounts are charged to deposit customers for specific services provided to the customer, such as 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/ATM and credit card interchange income Debit/ATM interchange income represent fees earned when a debit card issued by the Bank is used for a transaction. The Bank earns interchange fees from debit cardholder transactions through the MasterCard 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' account. Certain expenses directly associated with the debit card are recorded on a net basis with the interchange income. The Company utilizes a third party agency relationship to brand credit cards with fees for originating new accounts paid by the issuing bank. Credit card interchange income represents fees earned when a credit card is issued by the third party agent. Similar to debit card interchange fees, the Bank earns an interchange fee for each transaction made with Sound Community Bank's branded credit cards. The performance obligation is satisfied and the fees are earned when the cost of the transaction is charged to the cardholders' credit card. Certain expenses and rebates directly related to the credit card interchange contract are recorded net of the interchange income. Net loss on OREO and repossessed assets We record a gain or loss from the sale of other real estate owned when control of the property transfers to the buyer, which generally occurs at the time of an executed deed of trust. When the Bank finances the sale of other real estate owned to the buyer, the Company assesses whether the buyer is committed to perform their obligations under the contract and whether collectability of the transaction price is probable. Once these criteria are met, the other real estate owned asset is derecognized and the gain or loss on sale is recorded upon the transfer of control of the property to the buyer. In determining the gain or loss on sale, we adjust the transaction price and related gain or loss on sale if a significant financing component is present. The Company had a loss on the sale of OREO of $11,000 and $62,000 for the three and nine months ended September 30, 2018, respectively and $109,000 and $123,000 for the three and nine months ended September 30, 2017, respectively, included in Noninterest Expense.

Subsequent Event

Subsequent Event	9 Months Ended
	Sep. 30, 2018
Subsequent Event [Abstract]
Subsequent Event	Note 12 – Subsequent Event On October 24, 2018, the Board of Directors of the Company declared a quarterly cash dividend of $0.14 per common share, payable on November 21, 2018 to stockholders of record at the close of business on November 7, 2018.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2018
Basis of Presentation [Abstract]
Basis of Presentation	The accompanying financial information is unaudited and has been prepared from the consolidated financial statements of Sound Financial Bancorp, Inc., and its wholly owned subsidiary, Sound Community Bank. References in this document to Sound Financial Bancorp refer to Sound Financial Bancorp, Inc. and references to the "Bank" refer to Sound Community Bank. References to "we," "us," and "our" or the "Company" refers to Sound Financial Bancorp and its wholly-owned subsidiary, Sound Community Bank, unless the context otherwise requires. These unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("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"). In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. Certain information and disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. These unaudited financial statements should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2017, as filed with the SEC on March 27, 2018 ("2017 Form 10-K"). The results for the interim periods are not necessarily indicative of results for a full year. Certain amounts in the prior period's consolidated financial statements have been reclassified to conform to the current presentation. These classifications do not have an impact on previously reported consolidated net income, retained earnings, stockholders' equity or earnings per share.

Accounting Pronouncements Rec_2

Accounting Pronouncements Recently Issued or Adopted (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Pronouncements Recently Issued or Adopted [Abstract]
New Accounting Pronouncements	In January 2016, FASB issued ASU No. 2016-01, Financial Instruments - Overall, Recognition and Measurement of Financial Assets and Financial Liabilities . ASU 2016-01 requires equity investments (except those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income. In addition, the amendments in this ASU require an entity to disclose the fair value of financial instruments using the exit price notion. 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. The amendments in this ASU were effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company has used the exit price notion in the fair value disclosure of financial instruments in Note 5 of this report. The adoption of ASU 2016-01 did not have a material impact on the Company's consolidated financial statements. In February 2016, FASB issued ASU No. 2016-02, Leases (Topic 842) Leases (Topic 842), Targeted Improvements Although an estimate of the impact of the new leasing standard has not yet been determined, 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. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments- Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments In August 2016, FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments In March 2017, the FASB issued ASU 2017-08, Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20) In May 2017, the FASB issued ASU No. 2017-09, Compensation--Stock Compensation (Topic 718): Scope of Modification Accounting In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. In February 2018, FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220) In March 2018, FASB issued ASU No. 2018-05, Income Taxes (Topic 740) In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting. In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurement: Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement" ("ASU 2018-13"). This ASU modifies the disclosure requirements on fair value measurements. The following disclosure requirements were removed from FASB Accounting Standards Codification ("ASC") Topic 820 – Fair Value Measurement: (1) the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy; (2) the policy for timing of transfers between levels; and (3) the valuation processes for Level 3 fair value measurements. This ASU clarifies that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. The ASU adds the following disclosure requirements for Level 3 measurements: (1) changes in unrealized gains and losses for the period included in other comprehensive income for the recurring Level 3 fair value measurements held at the end of the reporting period; and (2) the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. Amendments in this ASU are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for any removed or modified disclosures. The adoption of ASU 2018-13 is not expected to have a material impact on the Company's consolidated financial statements.

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2018
Investments [Abstract]
Amortized Cost and Fair Value of AFS Securities and Corresponding Amounts of Gross Unrealized Gains And Losses	The amortized cost and fair value of our available-for-sale ("AFS") securities and the corresponding amounts of gross unrealized gains and losses at the dates indicated were as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value September 30, 2018 Municipal bonds $ 3,224 $ 111 $ (29 ) $ 3,306 Agency mortgage-backed securities 1,668 39 (2 ) 1,705 Total $ 4,892 $ 150 $ (31 ) $ 5,011 December 31, 2017 Municipal bonds $ 3,240 $ 155 $ (26 ) $ 3,369 Agency mortgage-backed securities 2,030 36 — 2,066 Total $ 5,270 $ 191 $ (26 ) $ 5,435
Amortized Cost and Fair Value of Investments Available-for-Sale by Contractual Maturity	The amortized cost and fair value of AFS securities at September 30, 2018, by contractual maturity, are shown below (in thousands). Expected maturities of AFS securities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Investments not due at a single maturity date, primarily mortgage-backed investments, are shown separately. September 30, 2018 Amortized Cost Fair Value Due after one year through five years $ 1,571 $ 1,547 Due after five years through ten years 153 160 Due after ten years 1,500 1,599 Mortgage-backed securities 1,668 1,705 Total $ 4,892 $ 5,011
Aggregate Fair Value and Gross Unrealized Loss in Continuous Unrealized Loss Position	The following tables summarize the aggregate fair value and gross unrealized loss by length of time of those investments that have been in a continuous unrealized loss position at the dates indicated (in thousands): September 30, 2018 Less Than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Municipal bonds $ — $ — $ 1,282 $ (29 ) $ 1,282 $ (29 ) Agency mortgage-backed securities 235 (2 ) — — 235 (2 ) Total $ 235 $ (2 ) $ 1,282 $ (29 ) $ 1,517 $ (31 ) December 31, 2017 Less Than 12 Months 12 Months or Longer Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Municipal bonds $ — $ — $ 1,302 $ (26 ) $ 1,302 $ (26 ) Total $ — $ — $ 1,302 $ (26 ) $ 1,302 $ (26 )

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2018
Loans [Abstract]
Composition of Loans Held-for-Portfolio, Excluding Loans Held for Sale	The composition of the loans-held-for portfolio at the dates indicated, excluding loans held-for-sale, was as follows (in thousands): September 30, 2018 December 31, 2017 Real estate loans: One-to-four family $ 170,509 $ 157,417 Home equity 28,525 28,379 Commercial and multifamily 254,050 211,269 Construction and land 60,877 61,482 Total real estate loans $ 513,961 $ 458,547 Consumer loans: Manufactured homes 19,448 17,111 Floating homes 41,377 29,120 Other consumer 5,026 4,902 Total consumer loans 65,851 51,133 Commercial business loans 39,681 40,829 Total loans held-for-portfolio 619,493 550,509 Deferred fees (2,263 ) (1,914 ) Total loans, gross held-for-portfolio 617,230 548,595 Allowance for loan losses (5,748 ) (5,241 ) Total loans held-for-portfolio, net $ 611,482 $ 543,354
Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method	The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2018 (in thousands): One-to-four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 363 $ 30 $ — $ 9 $ 295 $ — $ 69 $ 179 $ — $ 945 Collectively evaluated for impairment 1,076 180 1,631 379 124 269 38 240 866 4,803 Ending balance $ 1,439 $ 210 $ 1,631 $ 388 $ 419 $ 269 $ 107 $ 419 $ 866 $ 5,748 Loans hed-for-portfolio: Individually evaluated for impairment $ 4,932 $ 823 $ 3,274 $ 2,484 $ 425 $ — $ 163 $ 2,883 $ — $ 14,984 Collectively evaluated for impairment 165,577 27,702 250,776 58,393 19,023 41,377 4,863 36,798 — 604,509 Ending balance $ 170,509 $ 28,525 $ 254,050 $ 60,877 $ 19,448 $ 41,377 $ 5,026 $ 39,681 $ — $ 619,493 The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of December 31, 2017 (in thousands): One-to-four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 555 $ 120 $ — $ 13 $ 258 $ — $ 43 $ 135 $ — $ 1,124 Collectively evaluated for impairment 881 173 1,250 365 97 169 37 237 908 4,117 Ending balance $ 1,436 $ 293 $ 1,250 $ 378 $ 355 $ 169 $ 80 $ 372 $ 908 $ 5,241 Loans held-for-portfolio: Individually evaluated for impairment $ 6,256 $ 1,028 $ 1,699 $ 141 $ 385 $ — $ 194 $ 1,000 $ — $ 10,703 Collectively evaluated for impairment 151,161 27,351 209,570 61,341 16,726 29,120 4,708 39,829 — 539,806 Ending balance $ 157,417 $ 28,379 $ 211,269 $ 61,482 $ 17,111 $ 29,120 $ 4,902 $ 40,829 $ — $ 550,509
Activity in Allowance for Loan Losses	The following table summarizes the activity in the allowance for loan losses for the three months ended September 30, 2018 (in thousands): Beginning Allowance Charge-offs Recoveries Provision Ending Allowance One-to-four family $ 1,579 $ — $ — $ (140 ) $ 1,439 Home equity 211 — 3 (4 ) 210 Commercial and multifamily 1,401 — — 230 1,631 Construction and land 385 — — 3 388 Manufactured homes 326 — — 93 419 Floating homes 195 — — 74 269 Other consumer 116 (11 ) 3 (1 ) 107 Commercial business 553 — — (134 ) 419 Unallocated 737 — — 129 866 Total $ 5,503 $ (11 ) $ 6 $ 250 $ 5,748 The following table summarizes the activity in the allowance for loan losses for the nine months ended September 30, 2018 (in thousands): Beginning Allowance Charge-offs Recoveries Provision Ending Allowance One-to-four family $ 1,436 $ — $ 1 $ 2 $ 1,439 Home equity 293 (7 ) 41 (117 ) 210 Commercial and multifamily 1,250 — — 381 1,631 Construction and land 378 — — 10 388 Manufactured homes 355 (12 ) — 76 419 Floating homes 169 — — 100 269 Other consumer 80 (24 ) 8 43 107 Commercial business 372 — — 47 419 Unallocated 908 — — (42 ) 866 Total $ 5,241 $ (43 ) $ 50 $ 500 $ 5,748 The following table summarizes the activity in the allowance for loan losses for the three months ended September 30, 2017 (in thousands): Beginning Allowance Charge-offs Recoveries Provision Ending Allowance One-to-four family $ 1,302 $ — $ — $ (51 ) $ 1,251 Home equity 431 (89 ) 1 8 351 Commercial and multifamily 1,153 — — 32 1,185 Construction and land 352 — — 7 359 Manufactured homes 178 (7 ) — 9 180 Floating homes 146 — — 8 154 Other consumer 98 (1 ) 2 (1 ) 98 Commercial business 364 — — 143 507 Unallocated 811 — — 95 906 Total $ 4,835 $ (97 ) $ 3 $ 250 $ 4,991 The following table summarizes the activity in the allowance for loan losses for the nine months ended September 30, 2017 (in thousands): Beginning Allowance Charge-offs Recoveries Provision Ending Allowance One-to-four family $ 1,542 $ — $ — $ (291 ) $ 1,251 Home equity 378 (89 ) 30 32 351 Commercial and multifamily 1,144 (24 ) 1 64 1,185 Construction and land 459 — — (100 ) 359 Manufactured homes 168 (13 ) 3 22 180 Floating homes 132 — — 22 154 Other consumer 112 (8 ) 19 (25 ) 98 Commercial business 175 — — 332 507 Unallocated 712 — — 194 906 Total $ 4,822 $ (134 ) $ 53 $ 250 $ 4,991
Credit Quality Indicators	The following table represents the internally assigned grades as of September 30, 2018, by type of loan (in thousands): One-to- four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Total Grade: Pass $ 164,281 $ 27,995 $ 248,917 $ 58,438 $ 19,158 $ 41,377 $ 4,972 $ 37,095 $ 602,233 Watch 4,484 — 2,028 — 55 — — 839 7,406 Special Mention — — 1,458 2,362 — — — 476 4,296 Substandard 1,744 530 1,647 77 235 — 54 1,271 5,558 Doubtful — — — — — — — — — Loss — — — — — — — — — Total $ 170,509 $ 28,525 $ 254,050 $ 60,877 $ 19,448 $ 41,377 $ 5,026 $ 39,681 $ 619,493 The Bank had $3.3 million in performing loans identified as TDRs at September 30, 2018, that were not classified as special mention or substandard. The following table represents the internally assigned grades as of December 31, 2017, by type of loan (in thousands): One-to- four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Total Grade: Pass $ 153,793 $ 27,493 $ 199,887 $ 61,390 $ 16,877 $ 29,120 $ 4,708 $ 39,089 $ 532,357 Watch 244 — 9,683 — — — — 827 10,754 Special Mention 137 — 357 — — — — 784 1,278 Substandard 3,243 886 1,342 92 234 — 194 129 6,120 Doubtful — — — — — — — — — Loss — — — — — — — — — Total $ 157,417 $ 28,379 $ 211,269 $ 61,482 $ 17,111 $ 29,120 $ 4,902 $ 40,829 $ 550,509
Nonaccrual Loans	The following table presents the recorded investment in nonaccrual loans as of September 30, 2018, and December 31, 2017, by type of loan (in thousands): September 30, 2018 December 31, 2017 One-to-four family $ 824 $ 791 Home equity 384 722 Commercial and multifamily 539 201 Construction and land 76 92 Manufactured homes 223 206 Floating homes — — Other consumer 4 8 Commercial business 334 129 Total $ 2,384 $ 2,149
Aging of Recorded Investment in Past Due Loans	The following table represents the aging of the recorded investment in past due loans as of September 30, 2018, by type of loan (in thousands): 30-59 Days Past Due 60-89 Days Past Due 90 Days and Greater Past Due Total Past Due Current Total Loans One-to-four family $ — $ 222 $ 419 $ 641 $ 169,868 $ 170,509 Home equity 49 66 305 420 28,105 28,525 Commercial and multifamily 671 — 353 1,024 253,026 254,050 Construction and land — — — — 60,877 60,877 Manufactured homes — 6 205 211 19,237 19,448 Floating homes — — — — 41,377 41,377 Other consumer 8 1 — 9 5,017 5,026 Commercial business 323 67 — 390 39,291 39,681 Total $ 1,051 $ 362 $ 1,282 $ 2,695 $ 616,798 $ 619,493 The following table represents the aging of the recorded investment in past due loans as of December 31, 2017, by type of loan (in thousands): 30-59 Days Past Due 60-89 Days Past Due 90 Days and Greater Past Due Total Past Due Current Total Loans One-to-four family $ 2,092 $ 1,819 $ 727 $ 4,638 $ 152,779 $ 157,417 Home equity 521 5 633 1,159 27,220 28,379 Commercial and multifamily 313 — — 313 210,956 211,269 Construction and land 51 — 92 143 61,339 61,482 Manufactured homes 185 50 197 432 16,679 17,111 Floating homes — — — — 29,120 29,120 Other consumer 15 — — 15 4,887 4,902 Commercial business 400 — — 400 40,429 40,829 Total $ 3,577 $ 1,874 $ 1,649 $ 7,100 $ 543,409 $ 550,509
Credit Risk Profile of Loan Portfolio Based on Payment Activity by Type of Loan	The following table represents the credit risk profile of our loan portfolio based on payment activity as of September 30, 2018, by type of loan (in thousands): One-to-four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Total Performing $ 169,640 $ 28,141 $ 253,511 $ 60,801 $ 19,225 $ 41,377 $ 5,022 $ 39,264 $ 616,981 Nonperforming 869 384 539 76 223 — 4 417 2,512 Total $ 170,509 $ 28,525 $ 254,050 $ 60,877 $ 19,448 $ 41,377 $ 5,026 $ 39,681 $ 619,493 The following table represents the credit risk profile of our loan portfolio based on payment activity as of December 31, 2017, by type of loan (in thousands): One-to-four family Home equity Commercial and multifamily Construction and land Manufactured homes Floating homes Other consumer Commercial business Total Performing $ 156,580 $ 27,657 $ 211,068 $ 61,390 $ 16,905 $ 29,120 $ 4,894 $ 40,612 $ 548,226 Nonperforming 837 722 201 92 206 — 8 217 2,283 Total $ 157,417 $ 28,379 $ 211,269 $ 61,482 $ 17,111 $ 29,120 $ 4,902 $ 40,829 $ 550,509
Impaired Loans, Individually Evaluated	Impaired loans at September 30, 2018 and December 31, 2017, by type of loan were as follows (in thousands): September 30, 2018 Recorded Investment Unpaid Principal Balance Without Allowance With Allowance Total Recorded Investment Related Allowance One-to-four family $ 5,066 $ 1,934 $ 2,998 $ 4,932 $ 363 Home equity 903 662 161 823 30 Commercial and multifamily 3,274 3,274 — 3,274 — Construction and land 2,484 2,444 40 2,484 9 Manufactured homes 431 — 425 425 295 Floating homes — — — — — Other consumer 163 — 163 163 69 Commercial business 2,883 2,296 587 2,883 179 Total $ 15,204 $ 10,610 $ 4,374 $ 14,984 $ 945 December 31, 2017 Recorded Investment Unpaid Principal Balance Without Allowance With Allowance Total Recorded Investment Related Allowance One-to-four family $ 6,562 $ 3,197 $ 3,059 $ 6,256 $ 555 Home equity 1,149 677 351 1,028 120 Commercial and multifamily 1,722 1,699 — 1,699 — Construction and land 141 100 41 141 13 Manufactured homes 409 23 362 385 258 Floating homes — — — — — Other consumer 194 125 69 194 43 Commercial business 1,017 784 216 1,000 135 Total $ 11,194 $ 6,605 $ 4,098 $ 10,703 $ 1,124 The following tables provide the average recorded investment and interest income recognized on impaired loans for the three and nine months ended September 30, 2018 and 2017, respectively, by loan types (in thousands): Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized One-to-four family $ 4,826 $ 72 $ 6,603 $ 117 Home equity 807 10 1,008 10 Commercial and multifamily 3,204 46 1,732 24 Construction and land 1,305 86 114 (1 ) Manufactured homes 386 11 306 9 Other consumer 163 2 58 1 Commercial business 2,338 69 348 5 Total $ 13,029 $ 296 $ 10,169 $ 165 Nine Months Ended September 30, 2018 Nine Months Ended September 30, 2017 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized One-to-four family $ 5,594 $ 180 $ 5,718 $ 269 Home equity 926 25 921 30 Commercial and multifamily 2,487 134 1,652 72 Construction and land 1,313 93 91 2 Manufactured homes 405 27 311 19 Other consumer 179 7 60 3 Commercial business 1,942 125 487 16 Total $ 12,846 $ 591 $ 9,240 $ 411

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Measurements [Abstract]
Information about Level in Fair Value Hierarchy for Financial Instruments	The following tables present information about the level in the fair value hierarchy for the Company's financial assets and liabilities, whether or not recognized or recorded at fair value as of September 30, 2018 and December 31, 2017 (in thousands): September 30, 2018 Fair Value Measurements Using: Carrying Value Estimated Fair Value Level 1 Level 2 Level 3 FINANCIAL ASSETS: Cash and cash equivalents $ 62,292 $ 62,292 $ 62,292 $ — $ — Available-for-sale securities 5,011 5,011 — 5,011 — Loans held-for-sale 695 695 — 695 — Loans held-for-portfolio (1) 611,482 613,595 — — 613,595 Mortgage servicing rights 3,447 3,447 — — 3,447 FHLB stock 4,634 4,634 — — 4,634 FINANCIAL LIABILITIES: Non-maturity deposits 366,691 366,691 — 366,691 — Time deposits (1) 173,141 173,276 — 173,276 — Borrowings 96,500 96,500 — 96,500 — December 31, 2017 Fair Value Measurements Using: Carrying Value Estimated Fair Value Level 1 Level 2 Level 3 FINANCIAL ASSETS: Cash and cash equivalents $ 60,680 $ 60,680 $ 60,680 $ — $ — Available-for-sale securities 5,435 5,435 — 5,435 — Loans held-for-sale 1,777 1,777 — 1,777 — Loans held-for-portfolio (1) 543,354 543,400 — — 543,400 Mortgage servicing rights 3,426 3,426 — — 3,426 FHLB stock 3,065 3,065 — — 3,065 FINANCIAL LIABILITIES: Non-maturity deposits 349,846 349,846 — 349,846 — Time deposits (1) 164,554 163,485 — 163,485 — Borrowings 59,000 59,000 — 59,000 — (1)
Fair Value of Assets Measured on Recurring Basis	The following tables present the balance of assets measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017 (in thousands): Fair Value at September 30, 2018 Description Total Level 1 Level 2 Level 3 Municipal bonds $ 3,306 $ — $ 3,306 $ — Agency mortgage-backed securities 1,705 — 1,705 — Mortgage servicing rights 3,447 — — 3,447 Fair Value at December 31, 2017 Description Total Level 1 Level 2 Level 3 Municipal bonds $ 3,369 $ — $ 3,369 $ — Agency mortgage-backed securities 2,066 — 2,066 — Mortgage servicing rights 3,426 — — 3,426
Reconciliation of Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3)	There were no assets or liabilities (excluding mortgage servicing rights) measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the three and nine months ended September 30, 2018. The following table provides a reconciliation of assets and liabilities (excluding mortgage servicing rights) measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the three and nine months ended September 30, 2017 (in thousands): Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 Beginning balance, at fair value $ 318 $ 347 OTTI impairment losses — — Sales, redemptions and principal payments (318 ) (347 ) Change in unrealized loss — — Ending balance, at fair value $ — $ —
Fair Value of Assets Measured on Nonrecurring Basis	The following tables present the balance of assets measured at fair value on a nonrecurring basis at the dates indicated (in thousands): Fair Value at September 30, 2018 Total Level 1 Level 2 Level 3 OREO and repossessed assets $ 600 $ — $ — $ 600 Impaired loans 14,984 — — 14,984 Fair Value at December 31, 2017 Total Level 1 Level 2 Level 3 OREO and repossessed assets $ 610 $ — $ — $ 610 Impaired loans 10,703 — — 10,703
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of Assets, Quantitative Information	The following tables provide a description of the valuation technique, unobservable input, and qualitative information about the unobservable inputs for the Company's assets and liabilities classified as Level 3 and measured at fair value on a recurring basis at September 30, 2018 and December 31, 2017: September 30, 2018 Financial Instrument Valuation Technique Unobservable Input(s) Range (Weighted-Average) Mortgage Servicing Rights Discounted cash flow Prepayment speed assumption 80%-550% (130%) Discount rate 13%-14% (13%) December 31, 2017 Financial Instrument Valuation Technique Unobservable Input(s) Range (Weighted-Average) Mortgage Servicing Rights Discounted cash flow Prepayment speed assumption 103%-412% (160%) Discount rate 13%-15% (13%)

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	9 Months Ended
	Sep. 30, 2018
Mortgage Servicing Rights [Abstract]
Mortgage Service Rights Assumptions	The key economic assumptions used in determining the fair value of mortgage servicing rights at the dates indicated are as follows: September 30, 2018 December 31, 2017 Prepayment speed (Public Securities Association "PSA" model) 130 % 160 % Weighted-average life 7.5 years 6.9 years Discount rate 13 % 13 %

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Common Share [Abstract]
Earnings per Common Share	Earnings per share are summarized for the periods presented in the following table (in thousands, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Net income $ 1,830 $ 1,222 $ 5,397 $ 3,939 Weighted-average number of shares outstanding, basic 2,503 2,507 2,493 2,502 Effect of potentially dilutive common shares 67 55 72 61 Weighted-average number of shares outstanding, diluted 2,570 2,562 2,565 2,563 Earnings per share, basic $ 0.73 $ 0.49 $ 2.17 $ 1.57 Earnings per share, diluted $ 0.71 $ 0.48 $ 2.10 $ 1.54

Stock-based Compensation (Table

Stock-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2018
Stock-based Compensation [Abstract]
Stock Option Plan Award Activity	The stock option awards granted to date under the 2008 Plan vest in 20 percent annual increments commencing one year from the grant date in accordance with the requirements of the 2008 Plan. The stock option awards granted to date under the 2013 Plan vest in equal annual installments of either two or four years. All of the options granted under the Plans are exercisable for a period of 10 years from the date of grant, subject to vesting. The following is a summary of the Company's stock option award activity during the nine months ended September 30, 2018: Shares Weighted- Average Exercise Price Weighted-Average Remaining Contractual Term in Years Aggregate Intrinsic Value Outstanding at January 1, 2018 186,363 $ 18.04 6.26 $ 2,977,279 Granted — — Exercised (45,020 ) 15.44 Forfeited (7,318 ) 18.00 Expired — — Outstanding at September 30, 2018 134,025 18.92 5.86 2,764,915 Exercisable 106,036 18.19 5.63 2,264,936 Expected to vest, assuming a 0% forfeiture rate over the vesting term 27,989 $ 21.69 6.73 $ 499,980
Weighted-average Assumptions Used in Determining Fair Value of Options Granted	There were no stock options granted during nine months ended September 30, 2018. The fair value of options granted for the nine months ended September 30, 2017 was determined using the following weighted-average assumptions as of the grant date. Annual dividend yield 1.28 % Expected volatility 22.99 % Risk-free interest rate 2.20 % Expected term 6.50 years Weighted-average grant date fair value per option granted $ 6.62
Outstanding Restricted Stock Awards	The following is a summary of the Company's non-vested restricted stock award activity during the nine months ended September 30, 2018: Shares Weighted-Average Grant-Date Fair Value Per Share Aggregate Intrinsic Value Per Share Non-vested at January 1, 2018 11,785 $ 19.05 Granted — — Vested (10,907 ) 21.94 Forfeited (343 ) 18.36 Expired — — Non-vested at September 30, 2018 535 21.95 $ 39.55 Expected to vest assuming a 0% forfeiture rate over the vesting term 535 $ 21.95 $ 39.55

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue from Contracts with Customers [Abstract]
Sources of Noninterest Income	All of the Company's revenue from contracts with customers in the scope of Topic 606 - Revenue from Contracts with Customers Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Noninterest income: Service charges and fee income Account maintenance fees $ 46 $ 44 $ 146 $ 130 Transaction-based and overdraft service charges 114 102 338 308 Debit/ATM interchange fees 242 230 694 701 Credit card interchange fees 10 4 32 22 Loan fees (a) 76 47 178 235 Other fees (a) 16 12 38 46 Total service charges and fee income 504 439 1,426 1,442 Earnings on cash surrender value of bank-owned life insurance (a) 149 82 308 245 Mortgage servicing income (a) 22 18 447 399 Net gain on sale of loans (a) 333 287 1,008 720 Other income (a) 490 — 490 — Total noninterest income $ 1,498 $ 826 $ 3,679 $ 2,806 (a) Not within scope of Topic 606

Accounting Pronouncements Rec_3

Accounting Pronouncements Recently Issued or Adopted (Details)	9 Months Ended
	Sep. 30, 2018
Accounting Pronouncements Recently Issued or Adopted [Abstract]
Corporate tax rate	21.00%

Investments (Details)

Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Amortized cost and fair value of available-for-sale securities and gross unrealized gains and losses [Abstract]
Total	$ 4,892	$ 5,270
Gross unrealized gains	150	191
Gross unrealized losses	(31)	(26)
Estimated fair value	5,011	5,435
Municipal Bonds [Member]
Amortized cost and fair value of available-for-sale securities and gross unrealized gains and losses [Abstract]
Total	3,224	3,240
Gross unrealized gains	111	155
Gross unrealized losses	(29)	(26)
Estimated fair value	3,306	3,369
Agency Mortgage-backed Securities [Member]
Amortized cost and fair value of available-for-sale securities and gross unrealized gains and losses [Abstract]
Total	1,668	2,030
Gross unrealized gains	39	36
Gross unrealized losses	(2)	0
Estimated fair value	$ 1,705	$ 2,066

Investments, Mortgage-backed Se

Investments, Mortgage-backed Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Available-for-sale Securities by Contractual Maturity, Amortized Cost [Abstract]
Due after one year through five years	$ 1,571		$ 1,571
Due after five years through ten years	153		153
Due after ten years	1,500		1,500
Mortgage-backed securities	1,668		1,668
Total	4,892		4,892		$ 5,270
Available-for-sale Securities by Contractual Maturity, Fair Value [Abstract]
Due after one year through five years	1,547		1,547
Due after five years through ten years	160		160
Due after ten years	1,599		1,599
Mortgage-backed securities	1,705		1,705
Total	5,011		5,011		5,435
Pledged securities	0		0		$ 0
Sales of available for sale securities	$ 0	$ 0	$ 0	$ 0

Investments, Securities in Cont

Investments, Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	Sep. 30, 2018USD ($)Security	Dec. 31, 2017USD ($)Security	Sep. 30, 2017USD ($)
Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 235	$ 0
12 months or longer	1,282	1,302
Total	1,517	1,302
Continuous Unrealized Loss Position, Unrealized Loss [Abstract]
Less than 12 months	(2)	0
12 months or longer	(29)	(26)
Total	(31)	$ (26)
Credit losses recognized in earnings	$ 0		$ 0
Number of securities in unrealized loss position for less than 12 months | Security	1	0
Municipal Bonds [Member]
Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 0	$ 0
12 months or longer	1,282	1,302
Total	1,282	1,302
Continuous Unrealized Loss Position, Unrealized Loss [Abstract]
Less than 12 months	0	0
12 months or longer	(29)	(26)
Total	$ (29)	$ (26)
Number of securities in unrealized loss position for over 12 months | Security	3	3
Agency Mortgage-backed Securities [Member]
Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 235
12 months or longer	0
Total	235
Continuous Unrealized Loss Position, Unrealized Loss [Abstract]
Less than 12 months	(2)
12 months or longer	0
Total	$ (2)

Loans, Composition of Loans Hel

Loans, Composition of Loans Held-for-Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	$ 619,493		$ 550,509
Deferred fees	(2,263)		(1,914)
Total loans, gross	617,230		548,595
Allowance for loan losses	(5,748)	$ (5,503)	(5,241)	$ (4,991)	$ (4,835)	$ (4,822)
Total loans held-for-portfolio, net	611,482		543,354
One-to Four- Family [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	170,509		157,417
Allowance for loan losses	(1,439)	(1,579)	(1,436)	(1,251)	(1,302)	(1,542)
Home Equity [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	28,525		28,379
Allowance for loan losses	(210)	(211)	(293)	(351)	(431)	(378)
Commercial and Multifamily [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	254,050		211,269
Allowance for loan losses	(1,631)	(1,401)	(1,250)	(1,185)	(1,153)	(1,144)
Construction and Land [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	60,877		61,482
Allowance for loan losses	(388)	(385)	(378)	(359)	(352)	(459)
Manufactured Homes [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	19,448		17,111
Allowance for loan losses	(419)	(326)	(355)	(180)	(178)	(168)
Floating Homes [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	41,377		29,120
Allowance for loan losses	(269)	(195)	(169)	(154)	(146)	(132)
Other Consumer [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	5,026		4,902
Allowance for loan losses	(107)	(116)	(80)	(98)	(98)	(112)
Real Estate Loans [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	513,961		458,547
Real Estate Loans [Member] | One-to Four- Family [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	170,509		157,417
Real Estate Loans [Member] | Home Equity [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	28,525		28,379
Real Estate Loans [Member] | Commercial and Multifamily [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	254,050		211,269
Real Estate Loans [Member] | Construction and Land [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	60,877		61,482
Consumer Loans [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	65,851		51,133
Consumer Loans [Member] | Manufactured Homes [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	19,448		17,111
Consumer Loans [Member] | Floating Homes [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	41,377		29,120
Consumer Loans [Member] | Other Consumer [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	5,026		4,902
Commercial Business Loans [Member]
Composition of Loans Held-for-Portfolio [Abstract]
Total loans	39,681		40,829
Allowance for loan losses	$ (419)	$ (553)	$ (372)	$ (507)	$ (364)	$ (175)

Loans, Allowance for Loan Losse

Loans, Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Allowance for loan losses [Abstract]
Individually evaluated for impairment	$ 945		$ 1,124
Collectively evaluated for impairment	4,803		4,117
Ending balance	5,748	$ 5,503	5,241	$ 4,991	$ 4,835	$ 4,822
Loans held-for-portfolio [Abstract]
Individually evaluated for impairment	14,984		10,703
Collectively evaluated for impairment	604,509		539,806
Total loans	619,493		550,509
One-to Four- Family [Member]
Allowance for loan losses [Abstract]
Individually evaluated for impairment	363		555
Collectively evaluated for impairment	1,076		881
Ending balance	1,439	1,579	1,436	1,251	1,302	1,542
Loans held-for-portfolio [Abstract]
Individually evaluated for impairment	4,932		6,256
Collectively evaluated for impairment	165,577		151,161
Total loans	170,509		157,417
Home Equity [Member]
Allowance for loan losses [Abstract]
Individually evaluated for impairment	30		120
Collectively evaluated for impairment	180		173
Ending balance	210	211	293	351	431	378
Loans held-for-portfolio [Abstract]
Individually evaluated for impairment	823		1,028
Collectively evaluated for impairment	27,702		27,351
Total loans	28,525		28,379
Commercial and Multifamily [Member]
Allowance for loan losses [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	1,631		1,250
Ending balance	1,631	1,401	1,250	1,185	1,153	1,144
Loans held-for-portfolio [Abstract]
Individually evaluated for impairment	3,274		1,699
Collectively evaluated for impairment	250,776		209,570
Total loans	254,050		211,269
Construction and Land [Member]
Allowance for loan losses [Abstract]
Individually evaluated for impairment	9		13
Collectively evaluated for impairment	379		365
Ending balance	388	385	378	359	352	459
Loans held-for-portfolio [Abstract]
Individually evaluated for impairment	2,484		141
Collectively evaluated for impairment	58,393		61,341
Total loans	60,877		61,482
Manufactured Homes [Member]
Allowance for loan losses [Abstract]
Individually evaluated for impairment	295		258
Collectively evaluated for impairment	124		97
Ending balance	419	326	355	180	178	168
Loans held-for-portfolio [Abstract]
Individually evaluated for impairment	425		385
Collectively evaluated for impairment	19,023		16,726
Total loans	19,448		17,111
Floating Homes [Member]
Allowance for loan losses [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	269		169
Ending balance	269	195	169	154	146	132
Loans held-for-portfolio [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	41,377		29,120
Total loans	41,377		29,120
Other Consumer [Member]
Allowance for loan losses [Abstract]
Individually evaluated for impairment	69		43
Collectively evaluated for impairment	38		37
Ending balance	107	116	80	98	98	112
Loans held-for-portfolio [Abstract]
Individually evaluated for impairment	163		194
Collectively evaluated for impairment	4,863		4,708
Total loans	5,026		4,902
Commercial Business [Member]
Allowance for loan losses [Abstract]
Individually evaluated for impairment	179		135
Collectively evaluated for impairment	240		237
Ending balance	419	553	372	507	364	175
Loans held-for-portfolio [Abstract]
Individually evaluated for impairment	2,883		1,000
Collectively evaluated for impairment	36,798		39,829
Total loans	39,681		40,829
Unallocated [Member]
Allowance for loan losses [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	866		908
Ending balance	866	$ 737	908	$ 906	$ 811	$ 712
Loans held-for-portfolio [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	0		0
Total loans	$ 0		$ 0

Loans, Activity in Allowance fo

Loans, Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Summary of activity in allowance for loan losses [Roll Forward]
Beginning allowance	$ 5,503	$ 4,835	$ 5,241	$ 4,822
Charge-offs	(11)	(97)	(43)	(134)
Recoveries	6	3	50	53
Provision	250	250	500	250
Ending allowance	5,748	4,991	5,748	4,991
One-to Four- Family [Member]
Summary of activity in allowance for loan losses [Roll Forward]
Beginning allowance	1,579	1,302	1,436	1,542
Charge-offs	0	0	0	0
Recoveries	0	0	1	0
Provision	(140)	(51)	2	(291)
Ending allowance	1,439	1,251	1,439	1,251
Home Equity [Member]
Summary of activity in allowance for loan losses [Roll Forward]
Beginning allowance	211	431	293	378
Charge-offs	0	(89)	(7)	(89)
Recoveries	3	1	41	30
Provision	(4)	8	(117)	32
Ending allowance	210	351	210	351
Commercial and Multifamily [Member]
Summary of activity in allowance for loan losses [Roll Forward]
Beginning allowance	1,401	1,153	1,250	1,144
Charge-offs	0	0	0	(24)
Recoveries	0	0	0	1
Provision	230	32	381	64
Ending allowance	1,631	1,185	1,631	1,185
Construction and Land [Member]
Summary of activity in allowance for loan losses [Roll Forward]
Beginning allowance	385	352	378	459
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	3	7	10	(100)
Ending allowance	388	359	388	359
Manufactured Homes [Member]
Summary of activity in allowance for loan losses [Roll Forward]
Beginning allowance	326	178	355	168
Charge-offs	0	(7)	(12)	(13)
Recoveries	0	0	0	3
Provision	93	9	76	22
Ending allowance	419	180	419	180
Floating Homes [Member]
Summary of activity in allowance for loan losses [Roll Forward]
Beginning allowance	195	146	169	132
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	74	8	100	22
Ending allowance	269	154	269	154
Other Consumer [Member]
Summary of activity in allowance for loan losses [Roll Forward]
Beginning allowance	116	98	80	112
Charge-offs	(11)	(1)	(24)	(8)
Recoveries	3	2	8	19
Provision	(1)	(1)	43	(25)
Ending allowance	107	98	107	98
Commercial Business [Member]
Summary of activity in allowance for loan losses [Roll Forward]
Beginning allowance	553	364	372	175
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(134)	143	47	332
Ending allowance	419	507	419	507
Unallocated [Member]
Summary of activity in allowance for loan losses [Roll Forward]
Beginning allowance	737	811	908	712
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	129	95	(42)	194
Ending allowance	$ 866	$ 906	$ 866	$ 906

Loans, Credit Quality (Details)

Loans, Credit Quality (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	$ 619,493	$ 550,509
Performing [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	616,981	548,226
Loans classified as TDRs that were not classified as special mention or substandard	3,300
Pass [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	602,233	532,357
Watch [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	7,406	10,754
Special Mention [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	4,296	1,278
Substandard [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	5,558	6,120
Doubtful [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Loss [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
One-to Four- Family [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	170,509	157,417
One-to Four- Family [Member] | Performing [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	169,640	156,580
One-to Four- Family [Member] | Pass [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	164,281	153,793
One-to Four- Family [Member] | Watch [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	4,484	244
One-to Four- Family [Member] | Special Mention [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	137
One-to Four- Family [Member] | Substandard [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	1,744	3,243
One-to Four- Family [Member] | Doubtful [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
One-to Four- Family [Member] | Loss [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Home Equity [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	28,525	28,379
Home Equity [Member] | Performing [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	28,141	27,657
Home Equity [Member] | Pass [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	27,995	27,493
Home Equity [Member] | Watch [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Home Equity [Member] | Special Mention [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Home Equity [Member] | Substandard [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	530	886
Home Equity [Member] | Doubtful [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Home Equity [Member] | Loss [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Commercial and Multifamily [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	254,050	211,269
Commercial and Multifamily [Member] | Performing [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	253,511	211,068
Commercial and Multifamily [Member] | Pass [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	248,917	199,887
Commercial and Multifamily [Member] | Watch [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	2,028	9,683
Commercial and Multifamily [Member] | Special Mention [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	1,458	357
Commercial and Multifamily [Member] | Substandard [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	1,647	1,342
Commercial and Multifamily [Member] | Doubtful [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Commercial and Multifamily [Member] | Loss [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Construction and Land [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	60,877	61,482
Construction and Land [Member] | Performing [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	60,801	61,390
Construction and Land [Member] | Pass [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	58,438	61,390
Construction and Land [Member] | Watch [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Construction and Land [Member] | Special Mention [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	2,362	0
Construction and Land [Member] | Substandard [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	77	92
Construction and Land [Member] | Doubtful [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Construction and Land [Member] | Loss [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Manufactured Homes [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	19,448	17,111
Manufactured Homes [Member] | Performing [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	19,225	16,905
Manufactured Homes [Member] | Pass [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	19,158	16,877
Manufactured Homes [Member] | Watch [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	55	0
Manufactured Homes [Member] | Special Mention [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Manufactured Homes [Member] | Substandard [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	235	234
Manufactured Homes [Member] | Doubtful [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Manufactured Homes [Member] | Loss [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Floating Homes [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	41,377	29,120
Floating Homes [Member] | Performing [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	41,377	29,120
Floating Homes [Member] | Pass [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	41,377	29,120
Floating Homes [Member] | Watch [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Floating Homes [Member] | Special Mention [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Floating Homes [Member] | Substandard [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Floating Homes [Member] | Doubtful [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Floating Homes [Member] | Loss [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Other Consumer [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	5,026	4,902
Other Consumer [Member] | Performing [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	5,022	4,894
Other Consumer [Member] | Pass [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	4,972	4,708
Other Consumer [Member] | Watch [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Other Consumer [Member] | Special Mention [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Other Consumer [Member] | Substandard [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	54	194
Other Consumer [Member] | Doubtful [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Other Consumer [Member] | Loss [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Commercial Business [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	39,681	40,829
Commercial Business [Member] | Performing [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	39,264	40,612
Commercial Business [Member] | Pass [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	37,095	39,089
Commercial Business [Member] | Watch [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	839	827
Commercial Business [Member] | Special Mention [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	476	784
Commercial Business [Member] | Substandard [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	1,271	129
Commercial Business [Member] | Doubtful [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	0	0
Commercial Business [Member] | Loss [Member]
Internally Assigned Grades by Type of Loan [Abstract]
Total loans	$ 0	$ 0

Loans, Nonaccrual and Past Due

Loans, Nonaccrual and Past Due Loans (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Nonaccrual and Past Due Loans [Abstract]
Nonaccrual loans	$ 2,384	$ 2,149
Past Due	2,695	7,100
Current	616,798	543,409
Total loans	$ 619,493	550,509
Maximum [Member]
Nonaccrual and Past Due Loans [Abstract]
Period past due for loans to be automatically placed on nonaccrual	90 days
30-59 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	$ 1,051	3,577
60-89 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	362	1,874
90 Days and Greater Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	1,282	1,649
One-to Four- Family [Member]
Nonaccrual and Past Due Loans [Abstract]
Nonaccrual loans	824	791
Past Due	641	4,638
Current	169,868	152,779
Total loans	170,509	157,417
One-to Four- Family [Member] | 30-59 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	0	2,092
One-to Four- Family [Member] | 60-89 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	222	1,819
One-to Four- Family [Member] | 90 Days and Greater Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	419	727
Home Equity [Member]
Nonaccrual and Past Due Loans [Abstract]
Nonaccrual loans	384	722
Past Due	420	1,159
Current	28,105	27,220
Total loans	28,525	28,379
Home Equity [Member] | 30-59 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	49	521
Home Equity [Member] | 60-89 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	66	5
Home Equity [Member] | 90 Days and Greater Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	305	633
Commercial and Multifamily [Member]
Nonaccrual and Past Due Loans [Abstract]
Nonaccrual loans	539	201
Past Due	1,024	313
Current	253,026	210,956
Total loans	254,050	211,269
Commercial and Multifamily [Member] | 30-59 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	671	313
Commercial and Multifamily [Member] | 60-89 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	0	0
Commercial and Multifamily [Member] | 90 Days and Greater Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	353	0
Construction and Land [Member]
Nonaccrual and Past Due Loans [Abstract]
Nonaccrual loans	76	92
Past Due	0	143
Current	60,877	61,339
Total loans	60,877	61,482
Construction and Land [Member] | 30-59 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	0	51
Construction and Land [Member] | 60-89 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	0	0
Construction and Land [Member] | 90 Days and Greater Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	0	92
Manufactured Homes [Member]
Nonaccrual and Past Due Loans [Abstract]
Nonaccrual loans	223	206
Past Due	211	432
Current	19,237	16,679
Total loans	19,448	17,111
Manufactured Homes [Member] | 30-59 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	0	185
Manufactured Homes [Member] | 60-89 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	6	50
Manufactured Homes [Member] | 90 Days and Greater Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	205	197
Floating Homes [Member]
Nonaccrual and Past Due Loans [Abstract]
Nonaccrual loans	0	0
Past Due	0	0
Current	41,377	29,120
Total loans	41,377	29,120
Floating Homes [Member] | 30-59 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	0	0
Floating Homes [Member] | 60-89 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	0	0
Floating Homes [Member] | 90 Days and Greater Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	0	0
Other Consumer [Member]
Nonaccrual and Past Due Loans [Abstract]
Nonaccrual loans	4	8
Past Due	9	15
Current	5,017	4,887
Total loans	5,026	4,902
Other Consumer [Member] | 30-59 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	8	15
Other Consumer [Member] | 60-89 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	1	0
Other Consumer [Member] | 90 Days and Greater Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	0	0
Commercial Business [Member]
Nonaccrual and Past Due Loans [Abstract]
Nonaccrual loans	334	129
Past Due	390	400
Current	39,291	40,429
Total loans	39,681	40,829
Commercial Business [Member] | 30-59 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	323	400
Commercial Business [Member] | 60-89 Days Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	67	0
Commercial Business [Member] | 90 Days and Greater Past Due [Member]
Nonaccrual and Past Due Loans [Abstract]
Past Due	$ 0	$ 0

Loans, Credit Risk Profile Base

Loans, Credit Risk Profile Based on Payment Activity (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	$ 619,493	$ 550,509
Minimum [Member]
Nonperforming Loans [Abstract]
Period past due for loans still accruing interest to be considered nonperforming	90 days
Period past due for TDRs loans to be considered nonperforming	6 months
Performing [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	$ 616,981	548,226
Nonperforming [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	2,512	2,283
One-to Four- Family [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	170,509	157,417
One-to Four- Family [Member] | Performing [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	169,640	156,580
One-to Four- Family [Member] | Nonperforming [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	869	837
Home Equity [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	28,525	28,379
Home Equity [Member] | Performing [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	28,141	27,657
Home Equity [Member] | Nonperforming [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	384	722
Commercial and Multifamily [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	254,050	211,269
Commercial and Multifamily [Member] | Performing [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	253,511	211,068
Commercial and Multifamily [Member] | Nonperforming [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	539	201
Construction and Land [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	60,877	61,482
Construction and Land [Member] | Performing [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	60,801	61,390
Construction and Land [Member] | Nonperforming [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	76	92
Manufactured Homes [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	19,448	17,111
Manufactured Homes [Member] | Performing [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	19,225	16,905
Manufactured Homes [Member] | Nonperforming [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	223	206
Floating Homes [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	41,377	29,120
Floating Homes [Member] | Performing [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	41,377	29,120
Floating Homes [Member] | Nonperforming [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	0	0
Other Consumer [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	5,026	4,902
Other Consumer [Member] | Performing [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	5,022	4,894
Other Consumer [Member] | Nonperforming [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	4	8
Commercial Business [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	39,681	40,829
Commercial Business [Member] | Performing [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	39,264	40,612
Commercial Business [Member] | Nonperforming [Member]
Financing Receivable, Credit Risk Profile by Type of Loan [Abstract]
Total loans	$ 417	$ 217

Loans, Loans Individually Evalu

Loans, Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Impaired Loans [Abstract]
Unpaid principal balance	$ 15,204		$ 15,204		$ 11,194
Recorded investment, without allowance	10,610		10,610		6,605
Recorded investment, with allowance	4,374		4,374		4,098
Total recorded investment	14,984		14,984		10,703
Related allowance	945		945		1,124
Average recorded investment	13,029	$ 10,169	12,846	$ 9,240
Interest income recognized	296	165	591	411
Impaired loans, interest income forgone			24	12
Commitments to lend additional funds to borrowers whose loans were classified as nonaccrual, TDR or impaired	0		0		0
One-to Four- Family [Member]
Impaired Loans [Abstract]
Unpaid principal balance	5,066		5,066		6,562
Recorded investment, without allowance	1,934		1,934		3,197
Recorded investment, with allowance	2,998		2,998		3,059
Total recorded investment	4,932		4,932		6,256
Related allowance	363		363		555
Average recorded investment	4,826	6,603	5,594	5,718
Interest income recognized	72	117	180	269
Home Equity [Member]
Impaired Loans [Abstract]
Unpaid principal balance	903		903		1,149
Recorded investment, without allowance	662		662		677
Recorded investment, with allowance	161		161		351
Total recorded investment	823		823		1,028
Related allowance	30		30		120
Average recorded investment	807	1,008	926	921
Interest income recognized	10	10	25	30
Commercial and Multifamily [Member]
Impaired Loans [Abstract]
Unpaid principal balance	3,274		3,274		1,722
Recorded investment, without allowance	3,274		3,274		1,699
Recorded investment, with allowance	0		0		0
Total recorded investment	3,274		3,274		1,699
Related allowance	0		0		0
Average recorded investment	3,204	1,732	2,487	1,652
Interest income recognized	46	24	134	72
Construction and Land [Member]
Impaired Loans [Abstract]
Unpaid principal balance	2,484		2,484		141
Recorded investment, without allowance	2,444		2,444		100
Recorded investment, with allowance	40		40		41
Total recorded investment	2,484		2,484		141
Related allowance	9		9		13
Average recorded investment	1,305	114	1,313	91
Interest income recognized	86	(1)	93	2
Manufactured Homes [Member]
Impaired Loans [Abstract]
Unpaid principal balance	431		431		409
Recorded investment, without allowance	0		0		23
Recorded investment, with allowance	425		425		362
Total recorded investment	425		425		385
Related allowance	295		295		258
Average recorded investment	386	306	405	311
Interest income recognized	11	9	27	19
Floating Homes [Member]
Impaired Loans [Abstract]
Unpaid principal balance	0		0		0
Recorded investment, without allowance	0		0		0
Recorded investment, with allowance	0		0		0
Total recorded investment	0		0		0
Related allowance	0		0		0
Other Consumer [Member]
Impaired Loans [Abstract]
Unpaid principal balance	163		163		194
Recorded investment, without allowance	0		0		125
Recorded investment, with allowance	163		163		69
Total recorded investment	163		163		194
Related allowance	69		69		43
Average recorded investment	163	58	179	60
Interest income recognized	2	1	7	3
Commercial Business [Member]
Impaired Loans [Abstract]
Unpaid principal balance	2,883		2,883		1,017
Recorded investment, without allowance	2,296		2,296		784
Recorded investment, with allowance	587		587		216
Total recorded investment	2,883		2,883		1,000
Related allowance	179		179		$ 135
Average recorded investment	2,338	348	1,942	487
Interest income recognized	$ 69	$ 5	$ 125	$ 16

Loans, Troubled Debt Restructur

Loans, Troubled Debt Restructurings (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)Loan	Sep. 30, 2017USD ($)Loan	Dec. 31, 2017USD ($)
Troubled Debt Restructurings [Abstract]
Loans classified as TDRs	$ 4,200		$ 3,700
Number of loans modified as TDRs | Loan	4
Total modifications	$ 506
Number of TDR loans paid off | Loan	1
TDR loans paid off	$ 16
Number of loans with post-modification changes for unpaid principal balance in loans modified as TDRs | Loan	0	0
Number of loans for which there was payment default within first 12 months of modification | Loan	0	0
Commitments to extend additional credit to borrowers whose loan terms have been modified in TDRs	$ 0		$ 0
One-to Four- Family [Member]
Troubled Debt Restructurings [Abstract]
Number of loans modified as TDRs | Loan		1
Total modifications		$ 1,300
TDR loans paid off		125
Manufactured Homes [Member]
Troubled Debt Restructurings [Abstract]
TDR loans paid off		14
Home Equity [Member]
Troubled Debt Restructurings [Abstract]
Number of TDR loans paid off | Loan	1
TDR loans paid off		86
Land [Member]
Troubled Debt Restructurings [Abstract]
TDR loans paid off		27
Commercial and Multifamily [Member]
Troubled Debt Restructurings [Abstract]
TDR loans paid off		$ 359

Fair Value Measurements, Fair V

Fair Value Measurements, Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Sep. 30, 2018		Dec. 31, 2017
FINANCIAL ASSETS [Abstract]
Available-for-sale securities	$ 5,011		$ 5,435
Mortgage servicing rights	3,447		3,426
Level 1 [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	62,292		60,680
Available-for-sale securities	0		0
Loans held-for-sale	0		0
Loans held-for-portfolio	0		0
Mortgage servicing rights	0		0
FHLB Stock	0		0
FINANCIAL LIABILITIES [Abstract]
Non-maturity deposits	0		0
Time deposits	0		0
Borrowings	0		0
Level 2 [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	0		0
Available-for-sale securities	5,011		5,435
Loans held-for-sale	695		1,777
Loans held-for-portfolio	0		0
Mortgage servicing rights	0		0
FHLB Stock	0		0
FINANCIAL LIABILITIES [Abstract]
Non-maturity deposits	366,691		349,846
Time deposits	173,276		163,485
Borrowings	96,500		59,000
Level 3 [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	0		0
Available-for-sale securities	0		0
Loans held-for-sale	0		0
Loans held-for-portfolio	613,595		543,400
Mortgage servicing rights	3,447		3,426
FHLB Stock	4,634		3,065
FINANCIAL LIABILITIES [Abstract]
Non-maturity deposits	0		0
Time deposits	0		0
Borrowings	0		0
Carrying Value [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	62,292		60,680
Available-for-sale securities	5,011		5,435
Loans held-for-sale	695		1,777
Loans held-for-portfolio	611,482		543,354
Mortgage servicing rights	3,447		3,426
FHLB Stock	4,634		3,065
FINANCIAL LIABILITIES [Abstract]
Non-maturity deposits	366,691		349,846
Time deposits	173,141		164,554
Borrowings	96,500		59,000
Estimated Fair Value [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	62,292		60,680
Available-for-sale securities	5,011		5,435
Loans held-for-sale	695		1,777
Loans held-for-portfolio	613,595	[1]	543,400
Mortgage servicing rights	3,447		3,426
FHLB Stock	4,634		3,065
FINANCIAL LIABILITIES [Abstract]
Non-maturity deposits	366,691		349,846
Time deposits	173,276	[1]	163,485
Borrowings	$ 96,500		$ 59,000
[1]	The estimated fair values of loans receivable, net and time deposits for September 30, 2018 reflect exit price assumptions. The December 31, 2017 fair value estimates are not based on exit price assumptions.

Fair Value Measurements, Recurr

Fair Value Measurements, Recurring and Nonrecurring (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Balance of Assets Measured at Fair Value on Recurring or Nonrecurring Basis [Abstract]
Asset transfers from Level 1 to Level 2	$ 0	$ 0	$ 0	$ 0
Asset transfers from Level 2 into Level 3	0	$ 0	0	$ 0
Recurring [Member]
Balance of Assets Measured at Fair Value on Recurring or Nonrecurring Basis [Abstract]
Municipal bonds	3,306		3,306		$ 3,369
Agency mortgage-backed securities	1,705		1,705		2,066
Mortgage servicing rights	3,447		3,447		3,426
Balance of Liabilities Measured at Fair Value on Recurring or Nonrecurring Basis [Abstract]
Liabilities carried at fair value	0		0		0
Recurring [Member] | Level 1 [Member]
Balance of Assets Measured at Fair Value on Recurring or Nonrecurring Basis [Abstract]
Municipal bonds	0		0		0
Agency mortgage-backed securities	0		0		0
Mortgage servicing rights	0		0		0
Recurring [Member] | Level 2 [Member]
Balance of Assets Measured at Fair Value on Recurring or Nonrecurring Basis [Abstract]
Municipal bonds	3,306		3,306		3,369
Agency mortgage-backed securities	1,705		1,705		2,066
Mortgage servicing rights	0		0		0
Recurring [Member] | Level 3 [Member]
Balance of Assets Measured at Fair Value on Recurring or Nonrecurring Basis [Abstract]
Municipal bonds	0		0		0
Agency mortgage-backed securities	0		0		0
Mortgage servicing rights	3,447		3,447		3,426
Nonrecurring [Member]
Balance of Assets Measured at Fair Value on Recurring or Nonrecurring Basis [Abstract]
OREO and repossessed assets	600		600		610
Impaired loans	14,984		14,984		10,703
Balance of Liabilities Measured at Fair Value on Recurring or Nonrecurring Basis [Abstract]
Liabilities carried at fair value	0		0		0
Nonrecurring [Member] | Level 1 [Member]
Balance of Assets Measured at Fair Value on Recurring or Nonrecurring Basis [Abstract]
OREO and repossessed assets	0		0		0
Impaired loans	0		0		0
Nonrecurring [Member] | Level 2 [Member]
Balance of Assets Measured at Fair Value on Recurring or Nonrecurring Basis [Abstract]
OREO and repossessed assets	0		0		0
Impaired loans	0		0		0
Nonrecurring [Member] | Level 3 [Member]
Balance of Assets Measured at Fair Value on Recurring or Nonrecurring Basis [Abstract]
OREO and repossessed assets	600		600		610
Impaired loans	$ 14,984		$ 14,984		$ 10,703

Fair Value Measurements, Quanti

Fair Value Measurements, Quantitative Information (Details) - Level 3 [Member]	Sep. 30, 2018	Dec. 31, 2017
Recurring [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member] | Minimum [Member] | Prepayment Speed Assumption [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
Mortgage servicing rights, unobservable input(s)	0.8	1.03
Recurring [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member] | Minimum [Member] | Discount Rate [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
Mortgage servicing rights, unobservable input(s)	0.13	0.13
Recurring [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member] | Maximum [Member] | Prepayment Speed Assumption [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
Mortgage servicing rights, unobservable input(s)	5.5	4.12
Recurring [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member] | Maximum [Member] | Discount Rate [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
Mortgage servicing rights, unobservable input(s)	0.14	0.15
Recurring [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member] | Weighted Average [Member] | Prepayment Speed Assumption [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
Mortgage servicing rights, unobservable input(s)	1.3	1.6
Recurring [Member] | Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member] | Weighted Average [Member] | Discount Rate [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
Mortgage servicing rights, unobservable input(s)	0.13	0.13
Nonrecurring [Member] | OREO [Member] | Market Approach [Member] | Minimum [Member] | Adjusted for Difference between Comparable Sales [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
OREO, unobservable input(s)	0	0
Nonrecurring [Member] | OREO [Member] | Market Approach [Member] | Maximum [Member] | Adjusted for Difference between Comparable Sales [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
OREO, unobservable input(s)	0	0
Nonrecurring [Member] | OREO [Member] | Market Approach [Member] | Weighted Average [Member] | Adjusted for Difference between Comparable Sales [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
OREO, unobservable input(s)	0	0
Nonrecurring [Member] | Impaired Loans [Member] | Market Approach [Member] | Minimum [Member] | Adjusted for Difference between Comparable Sales [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
Impaired loans, unobservable input(s)	0	0
Nonrecurring [Member] | Impaired Loans [Member] | Market Approach [Member] | Maximum [Member] | Adjusted for Difference between Comparable Sales [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
Impaired loans, unobservable input(s)	1	1
Nonrecurring [Member] | Impaired Loans [Member] | Market Approach [Member] | Weighted Average [Member] | Adjusted for Difference between Comparable Sales [Member]
Valuation Technique, Unobservable Input, and Qualitative Information about Unobservable Inputs [Abstract]
Impaired loans, unobservable input(s)	0.06	0.08

Fair Value Measurements, Level

Fair Value Measurements, Level 3 Unobservable Inputs (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Reconciliation of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) [Roll Forward]
Beginning balance, at fair value	$ 318	$ 347
OTTI impairment losses	0	0
Sales, redemptions and principal payments	(318)	(347)
Change in unrealized loss	0	0
Ending balance, at fair value	$ 0	$ 0

Mortgage Servicing Rights (Deta

Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Mortgage Servicing Rights [Abstract]
Loans serviced by others	$ 25,600		$ 25,600		$ 31,600
Mortgage Servicing Right, Key Economic Assumptions [Abstract]
Prepayment speed (Public Securities Association "PSA" model)			130.00%		160.00%
Weighted-average life			7 years 6 months		6 years 10 months 24 days
Discount rate			13.00%		13.00%
Contractually specified servicing, late and ancillary fees earned and recorded in mortgage servicing income, net of fair value market adjustments to the mortgage servicing rights	22	$ 18	$ 447	$ 399
Federal National Mortgage Association ("Fannie Mae") [Member]
Mortgage Servicing Rights [Abstract]
Loans serviced for others	354,400		354,400		$ 392,600
Other Financial Institutions [Member]
Mortgage Servicing Rights [Abstract]
Loans serviced for others	$ 7,300		$ 7,300		$ 19,900

Borrowings and FHLB Stock (Deta

Borrowings and FHLB Stock (Details) - USD ($)	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Borrowings and FHLB Stock [Abstract]
Weighted average interest rate on borrowings due within one year	1.99%	1.63%
Investment in FHLB stock	$ 4,634,000	$ 3,065,000
Federal Home Loan Bank of Des Moines [Member]
Borrowings and FHLB Stock [Abstract]
Amount available to borrow under loan agreement	308,500,000	217,600,000
Outstanding borrowings	96,500,000	59,000,000
Net remaining amount available	146,000,000	144,100,000
One-to Four- Family [Member] | Federal Home Loan Bank of Des Moines [Member]
Borrowings and FHLB Stock [Abstract]
Loans used as collateral for credit facility	126,700,000	111,500,000
Commercial and Multifamily [Member] | Federal Home Loan Bank of Des Moines [Member]
Borrowings and FHLB Stock [Abstract]
Loans used as collateral for credit facility	117,800,000	103,000,000
Home Equity [Member] | Federal Home Loan Bank of Des Moines [Member]
Borrowings and FHLB Stock [Abstract]
Loans used as collateral for credit facility	12,500,000	15,200,000
Line of Credit [Member] | Pacific Coast Banker's Bank [Member]
Borrowings and FHLB Stock [Abstract]
Amount available to borrow under loan agreement	2,000,000
Outstanding borrowings	$ 0	0
Term period	1 year
Maturity date	Jun. 30, 2019
Line of Credit [Member] | Zions Bank [Member]
Borrowings and FHLB Stock [Abstract]
Outstanding borrowings	$ 0	0
Line of credit facility, maximum borrowing capacity	9,000,000
Line of credit facility, minimum cash balance required	250,000
Line of Credit [Member] | The Independent Bank [Member]
Borrowings and FHLB Stock [Abstract]
Amount available to borrow under loan agreement	10,000,000
Outstanding borrowings	0	0
Letter of Credit [Member] | Federal Home Loan Bank of Des Moines [Member]
Borrowings and FHLB Stock [Abstract]
Letters of credit to secure public deposits	14,500,000	14,500,000
Federal Reserve Bank [Member]
Borrowings and FHLB Stock [Abstract]
Outstanding borrowings	0	0
Unused borrowing capacity	$ 59,100,000	$ 51,200,000

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Common Share [Abstract]
Net income	$ 1,830	$ 1,222	$ 5,397	$ 3,939
Weighted-average number of shares outstanding, basic (in shares)	2,502,959	2,506,863	2,492,738	2,502,399
Effect of potentially dilutive common shares (in shares)	67,000	55,000	72,000	61,000
Weighted-average number of shares outstanding, diluted (in shares)	2,569,535	2,562,373	2,564,688	2,562,606
Earnings per share, basic (in dollars per share)	$ 0.73	$ 0.49	$ 2.17	$ 1.57
Earnings per share, diluted (in dollars per share)	$ 0.71	$ 0.48	$ 2.10	$ 1.54
Anti-dilutive securities not included in computation of diluted earnings per common share (in shares)	0	0	0	0

Stock-based Compensation (Detai

Stock-based Compensation (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)shares	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)Planshares	Sep. 30, 2017USD ($)
Stock Options and Restricted Stock [Abstract]
Number of equity incentive plans | Plan			2
Share-based compensation expense | $	$ 67	$ 144	$ 201	$ 432
Stock Options [Member]
Stock Options and Restricted Stock [Abstract]
Cumulative number of shares issued (in shares)	258,479		258,479
Restricted Stock [Member]
Stock Options and Restricted Stock [Abstract]
Cumulative number of shares issued (in shares)	106,870		106,870
2008 Plan [Member] | Stock Options and Stock Appreciation Rights [Member]
Stock Options and Restricted Stock [Abstract]
Shares authorized (in shares)	126,287		126,287
2008 Plan [Member] | Restricted Stock and Restricted Stock Units [Member]
Stock Options and Restricted Stock [Abstract]
Shares authorized (in shares)	50,514		50,514
2013 Plan [Member] | Stock Options and Stock Appreciation Rights [Member]
Stock Options and Restricted Stock [Abstract]
Shares authorized (in shares)	181,750		181,750
2013 Plan [Member] | Restricted Stock and Restricted Stock Units [Member]
Stock Options and Restricted Stock [Abstract]
Shares authorized (in shares)	116,700		116,700

Stock-based Compensation, Stock

Stock-based Compensation, Stock Option Awards (Details) - Stock Options [Member] - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Stock Option Awards [Abstract]
Term of awards	10 years
Options, Outstanding [Roll Forward]
Outstanding, beginning of period (in shares)	186,363
Granted (in shares)	0
Exercised (in shares)	(45,020)
Forfeited (in shares)	(7,318)
Expired (in shares)	0
Outstanding, end of period (in shares)	134,025		186,363
Exercisable (in shares)	106,036
Expected to vest, assuming a 0% forfeiture rate over the vesting term (in shares)	27,989
Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning of period (in dollars per share)	$ 18.04
Granted (in dollars per share)	0
Exercised (in dollars per share)	15.44
Forfeited (in dollars per share)	18
Expired (in dollars per share)	0
Outstanding, end of period (in dollars per share)	18.92		$ 18.04
Exercisable (in dollars per share)	18.19
Expected to vest, assuming a 0% forfeiture rate over the vesting term (in dollars per share)	$ 21.69
Options, Additional Disclosures [Abstract]
Outstanding, weighted-average remaining contractual term	5 years 10 months 10 days		6 years 3 months 4 days
Exercisable, weighted-average remaining contractual term	5 years 7 months 17 days
Expected to vest, assuming a 0% forfeiture rate over the vesting term, weighted-average remaining contractual term	6 years 8 months 23 days
Outstanding, aggregate intrinsic value	$ 2,764,915		$ 2,977,279
Exercisable, aggregate intrinsic value	2,264,936
Expected to vest, assuming a 0% forfeiture rate over the vesting term, aggregate intrinsic value	$ 499,980
Forfeiture rate	0.00%
Unrecognized compensation cost	$ 83,000
Share-based compensation arrangement, fair value assumptions and methodology [Abstract]
Annual dividend yield		1.28%
Expected volatility		22.99%
Risk-free interest rate		2.20%
Expected term		6 years 6 months
Weighted-average grant date fair value per option granted (in dollars per share)		$ 6.62
Maximum [Member]
Options, Additional Disclosures [Abstract]
Remaining weighted-average vesting period	1 year
2008 Plan [Member]
Stock Option Awards [Abstract]
Annual vesting percentage	20.00%
Vesting commencement period from grant date	1 year
2013 Plan [Member] | Minimum [Member]
Stock Option Awards [Abstract]
Award vesting period	2 years
2013 Plan [Member] | Maximum [Member]
Stock Option Awards [Abstract]
Award vesting period	4 years

Stock-based Compensation, Restr

Stock-based Compensation, Restricted Stock Awards (Details) - Restricted Stock Awards [Member] $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)Installment$ / sharesshares	Sep. 30, 2017USD ($)
Nonvested Restricted Stock Awards [Roll Forward]
Non-vested, beginning of period (in shares) | shares	11,785
Granted (in shares) | shares	0
Vested (in shares) | shares	(10,907)
Forfeited (in shares) | shares	(343)
Expired (in shares) | shares	0
Non-vested, end of period (in shares) | shares	535
Expected to vest assuming a 0% forfeiture rate over the vesting term (in shares) | shares	535
Nonvested Restricted Stock Awards, Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested, beginning of period (in dollars per share)	$ 19.05
Granted (in dollars per share)	0
Vested (in dollars per share)	21.94
Forfeited (in dollars per share)	18.36
Expired (in dollars per share)	0
Non-vested, end of period (in dollars per share)	21.95
Expected to vest assuming a 0% forfeiture rate over the vesting term, weighted average grant date fair value (in dollars per share)	21.95
Nonvested Restricted Stock Awards, Additional Disclosures [Abstract]
Aggregate intrinsic value per share (in dollars per share)	39.55
Expected to vest assuming a 0% forfeiture rate over the vesting term, aggregate intrinsic value per share (in dollars per share)	$ 39.55
Forfeiture rate	0.00%
Unrecognized compensation cost | $	$ 12
Remaining weighted-average vesting period	1 year
Total fair value of shares vested | $	$ 239	$ 430
2008 Plan [Member]
Restricted Stock Awards [Abstract]
Annual vesting percentage	20.00%
Vesting commencement period from grant date	1 year
2013 Plan [Member]
Restricted Stock Awards [Abstract]
Vesting commencement period from grant date	1 year
Immediate vesting percentage	33.33%
Number of annual installments | Installment	2

Stock-based Compensation, Emplo

Stock-based Compensation, Employee Stock Ownership Plan (Details) - Employee Stock Ownership Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Aug. 31, 2012	Jan. 31, 2008
Employee Stock Ownership Plan [Abstract]
Repayment period			10 years
Committed to release (in shares)	11,340		11,340
Unallocated shares (in shares)	34,020		34,020
Number of shares of common stock purchased for inclusion in the Plan (in shares)			6,393
Cash contribution to the Plan			$ 125
Number of common shares hold by the trust (in shares)	168,006		168,006
Fair value of shares held by ESOP trust	$ 6,600		$ 6,600
ESOP compensation expense	172	$ 172	518	$ 510
ESOP Borrowing in 2008 [Member]
Employee Stock Ownership Plan [Abstract]
Amount borrowed by ESOP to purchase common stock						$ 1,200
ESOP Borrowing in 2012 [Member]
Employee Stock Ownership Plan [Abstract]
Amount borrowed by ESOP to purchase common stock					$ 1,100
ESOP loan interest rate					2.25%
ESOP remaining loan balance from shares purchased	$ 477		$ 477

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Service charges and fee income [Abstract]
Loan fees	[1]	$ 76	$ 47	$ 178	$ 235
Other fees	[1]	16	12	38	46
Total service charges and fee income		504	439	1,426	1,442
Earnings on cash surrender value of bank-owned life insurance	[1]	149	82	308	245
Mortgage servicing income	[1]	22	18	447	399
Net gain on sale of loans	[1]	333	287	1,008	720
Other income	[1]	490	0	490	0
Total noninterest income		1,498	826	3,679	2,806
Loss on sale of OREO		(11)	(109)	(62)	(123)
Account Maintenance Fees [Member]
Service charges and fee income [Abstract]
Service charges and fee income within scope of ASC 606		46	44	146	130
Transaction-based and Overdraft Service Charges [Member]
Service charges and fee income [Abstract]
Service charges and fee income within scope of ASC 606		114	102	338	308
Debit/ATM Interchange Fees [Member]
Service charges and fee income [Abstract]
Service charges and fee income within scope of ASC 606		242	230	694	701
Credit Card and Interchange Fees [Member]
Service charges and fee income [Abstract]
Service charges and fee income within scope of ASC 606		$ 10	$ 4	$ 32	$ 22
[1]	Not within scope of Topic 606

Subsequent Event (Details)

Subsequent Event (Details) - Subsequent Event [Member] - Quarterly Cash Dividend Declared [Member]	Oct. 26, 2018$ / shares
Dividends [Abstract]
Dividends payable, date declared	Oct. 24, 2018
Dividends declared (in dollars per share)	$ 0.14
Dividends payable, date to be paid	Nov. 21, 2018
Dividends payable, date of record	Nov. 7, 2018