Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Unearned ESOP Shares [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss, net of tax [Member]	Total
Balances at Dec. 31, 2010	$ 30	$ 11,808	$ (809)	$ 16,545	$ (671)	$ 26,903
Balance (in shares) at Dec. 31, 2010	2,954,295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				1,551		1,551
Other comprehensive income, net of tax					12	12
Forfeited restricted shares (in shares)	(5,250)
Share-based compensation		132				132
Allocation of ESOP shares		(1)	116			115
Balances at Dec. 31, 2011	30	11,939	(693)	18,096	(659)	28,713
Balances (in shares) at Dec. 31, 2011	2,949,045					2,960,045
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				2,640		2,640
Other comprehensive income, net of tax					163	163
Restricted stock awards	0					0
Restricted stock awards (in shares)	11,000
Cancel Sound Financial MHC shares	(16)					(16)
Cancel Sound Financial MHC shares (in shares)	(1,621,435)
Exchange of common stock at 0.87423 shares per common share	(2)					(2)
Exchange of common stock at 0.87423 shares per common share (in shares)	(168,357)
Proceeds from stock offering, net of offering costs	14	12,658				12,672
Proceeds from stock offering, net of offering costs (in shares)	1,417,291
Purchase of common stock by ESOP			(1,134)			(1,134)
Share-based compensation		167				167
Allocation of ESOP shares		25	229			254
Balances at Dec. 31, 2012	$ 26	$ 24,789	$ (1,598)	$ 20,736	$ (496)	$ 43,457
Balances (in shares) at Dec. 31, 2012	2,587,544					2,587,544