Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Common Stock Warrant [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance (shares) at Dec. 31, 2012		0	21,698,115
Beginning balance at Dec. 31, 2012	$ 98,445	$ 0	$ 460,955	$ 0	$ (362,187)	$ (323)
Comprehensive income (loss):
Net income (loss)	(1,483)				(1,483)
Other comprehensive income (loss), net of tax	(17,282)					(17,282)
Comprehensive income (loss)	(18,765)
Stock options and awards:
Compensation expense recognized	628		$ 628
Shares issued as compensation to directors (shares)			5,001
Shares issued as compensation to directors	53		$ 53
Restricted stock issued to employees and directors, net of cancellations (shares)			158,302
Ending balance (shares) at Dec. 31, 2013		0	21,861,418
Ending balance at Dec. 31, 2013	80,361	$ 0	$ 461,636	0	(363,670)	(17,605)
Comprehensive income (loss):
Net income (loss)	150,458				150,458
Other comprehensive income (loss), net of tax	10,130					10,130
Comprehensive income (loss)	160,588
Stock offering, net of issuance cost ($18 for the year ended December 31, 2014, respectively) (shares)			2,367,425
Stock offering, net of issuance cost ($18 for the year ended December 31, 2014, respectively)	24,982		$ 24,982
Reclass of warrant upon expiration of down-round term	56		56
Stock options and awards:
Compensation expense recognized	853		$ 853
Shares issued as compensation to directors (shares)			7,423
Shares issued as compensation to directors	76		$ 76
Restricted stock issued to employees and directors, net of cancellations (shares)			(50,343)
Ending balance (shares) at Dec. 31, 2014		0	24,185,923
Ending balance at Dec. 31, 2014	266,916	$ 0	$ 487,603	0	(213,212)	(7,475)
Comprehensive income (loss):
Net income (loss)	6,914				6,914
Other comprehensive income (loss), net of tax	(3,264)					(3,264)
Comprehensive income (loss)	3,650
Stock options and awards:
Compensation expense recognized	2,429		$ 2,429
Shares issued as compensation to directors (shares)			3,922
Shares issued as compensation to directors	43		$ 43
Restricted stock issued to employees and directors, net of cancellations (shares)			102,801
Ending balance (shares) at Dec. 31, 2015		0	24,292,646
Ending balance at Dec. 31, 2015	$ 273,038	$ 0	$ 490,075	$ 0	$ (206,298)	$ (10,739)