Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Unearned Employee Stock Ownership Plan Shares	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2012	$ 172,890	$ 211	$ 193,590	$ (9,796)	$ (12,233)	$ 1,118
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,298	0	0	3,298	0	0
Other comprehensive loss, net of tax effect	(699)	0	0	0	0	(699)
Nonvested stock awards-stock-based compensation expense	86	0	86	0	0	0
Cash dividends declared on common stock	(844)	0	0	(844)	0	0
ESOP shares earned	(896)	0	(82)	0	(978)	0
Ending Balance at Dec. 31, 2013	175,627	211	193,594	(7,342)	(11,255)	419
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	40,614	0	0	40,614	0	0
Other comprehensive loss, net of tax effect	338	0	0	0	0	338
Nonvested stock awards-stock-based compensation expense	70	0	70	0	0	0
Cash dividends declared on common stock	(1,688)	0	0	(1,688)	0	0
ESOP shares earned	(1,160)	0	(181)	0	(979)	0
Ending Balance at Dec. 31, 2014	216,121	211	193,845	31,584	(10,276)	757
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	8,675	0	0	8,675	0	0
Other comprehensive loss, net of tax effect	(210)	0	0	0	0	(210)
Stock Repurchased During Period, Value	(9,970)	(8)	(9,962)
Nonvested stock awards-stock-based compensation expense	657	0	657	0	0	0
Cash dividends declared on common stock	(4,145)	0	0	(4,145)	0	0
ESOP shares earned	(1,236)	0	(257)	0	(979)	0
Ending Balance at Dec. 31, 2015	$ 212,364	$ 203	$ 184,797	$ 36,114	$ (9,297)	$ 547