Consolidated Statement of Shareholders' Equity (unaudited) - 6 months ended Jun. 30, 2018 - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Unearned ESOP Shares	Accumulated Other Comprehensive Loss	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2017		121,875	16,548,829
Beginning balance at Dec. 31, 2017	$ 254,015	$ 40,987	$ 1,655	$ 168,412	$ (937)	$ (1,828)	$ 45,726
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(308)						(308)
Dividends on Series B and Series C preferred stock	(1,621)						(1,621)
Dividends on common stock, $0.02 per share	(330)						(330)
Restricted stock grant (in shares)			66,335
Restricted stock grant			$ 7	(7)
Restricted stock forfeitures (in shares)			(37,775)
Restricted stock forfeitures			$ (4)	4
ESOP shares released for allocation	61				61
ESOP compensation expense	20			20
Exercise of stock options (in shares)			42,505
Exercise of stock options	551		$ 4	547
Stock option and restricted stock compensation expense	(113)			(113)
Change in accumulated other comprehensive loss	(3,603)					(3,603)
Ending balance at Jun. 30, 2018	$ 248,672	$ 40,987	$ 1,662	$ 168,863	$ (876)	$ (5,400)	$ 43,436
Ending balance (in shares) at Jun. 30, 2018		121,875	16,619,894