Consolidated Statements Of Equity - USD ($) $ in Thousands	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Comprehensive Income	Total
BALANCE - beginning of period at Dec. 31, 2013	$ 1	$ 397	$ 240,660	$ 37,297	$ 2,730	$ 281,085
BALANCE - beginning of period (shares) at Dec. 31, 2013	57,366	40,368,008
Options exercised, value		$ 4	1,112			1,116
Options exercised, shares		154,091
Employee stock purchase plan, value		$ 1	453			454
Employee stock purchase plan, shares		43,449
Shares withheld in net settlement of restricted stock		$ (1)	(409)	(635)		(1,045)
Shares withheld in net settlement of restricted stock (shares)		(92,340)
Restricted stock awards, net of forfeitures, shares		297,182
Stock-based compensation expense			3,141			3,141
Tax benefit from stock-based compensation			63			63
Dividends paid-common				(6,076)		(6,076)
Dividends paid/accumulated-preferred stock				(574)		(574)
Other comprehensive income (loss), net of income taxes of $1665, $642 and $(982) respectively					1,598	1,598
Net income				29,007		29,007
BALANCE - end of period at Dec. 31, 2014	$ 1	$ 401	245,020	59,019	4,328	308,769
BALANCE - end of period (shares) at Dec. 31, 2014	57,366	40,770,390
Options exercised, value		$ 5	1,270			1,275
Options exercised, shares		166,589
Employee stock purchase plan, value		$ 1	457			458
Employee stock purchase plan, shares		39,309
Shares withheld in net settlement of restricted stock		$ (1)	(470)	(736)		(1,207)
Shares withheld in net settlement of restricted stock (shares)		(103,763)
Restricted stock awards, net of forfeitures, shares		249,594
Stock-based compensation expense			3,324			3,324
Tax benefit from stock-based compensation			532			532
Redemption of preferred stock	$ (1)		(57,365)			(57,366)
Redemption of preferred stock (in shares)	(57,366)
Dividends paid-common				(6,953)		(6,953)
Dividends paid/accumulated-preferred stock				(320)		(320)
Other comprehensive income (loss), net of income taxes of $1665, $642 and $(982) respectively					(1,045)	(1,045)
Net income				26,069		26,069
BALANCE - end of period (Previously Reported) at Dec. 31, 2015		$ 406	192,768	77,079	3,283	273,536
BALANCE - end of period at Dec. 31, 2015					3,283	273,536
BALANCE - end of period (shares) (Previously Reported) at Dec. 31, 2015		41,122,119
Options exercised, value		$ 2	1,678			$ 1,680
Options exercised, shares		216,268				216,268
Employee stock purchase plan, value		$ 1	437			$ 438
Employee stock purchase plan, shares		36,813
Shares withheld in net settlement of restricted stock		$ (1)	(359)	(531)		(891)
Shares withheld in net settlement of restricted stock (shares)		(77,855)
Restricted stock awards, net of forfeitures		$ 3	(3)
Restricted stock awards, net of forfeitures, shares		257,863
Stock-based compensation expense			3,213			3,213
Dividends paid-common				(7,858)		(7,858)
Other comprehensive income (loss), net of income taxes of $1665, $642 and $(982) respectively					(2,717)	(2,717)
Net income				34,899		34,899
BALANCE - end of period at Dec. 31, 2016		$ 411	197,758	103,575	$ 566	302,310
BALANCE - end of period (shares) at Dec. 31, 2016		41,555,208
Cumulative effect of adopting of ASU 2016-09 | Early adoption | ASU 2016-09			$ 24	$ (14)		$ 10