Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Preferred stock [Member]	Common Stock [Member]	Warrant [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	2011 Issuance [Member]	2011 Issuance [Member] Common Stock [Member]	2012 Issuance [Member]	2012 Issuance [Member] Common Stock [Member]
Beginning balance at Dec. 31, 2011	$ 129,015	$ 0	$ 455,166	$ 0	$ (322,182)	$ (3,969)
Beginning balance, shares at Dec. 31, 2011		0	21,102,668
Comprehensive loss:
Net loss	(40,005)				(40,005)
Other comprehensive income (loss), net of tax	3,646					3,646
Comprehensive income (loss)	(36,359)
Compensation expense recognized	3		3
Expense related to common stock issued							(911)	(911)	(379)
Issuance of stock	7,290								6,694	6,694
Issuance of stock, shares										485,788
Restricted stock issued, shares			110,059
Return of common stock not received for fractional shares rounding purposes in the 1:100 reverse stock split			(586)
Exercise of warrants related to stock offering	3		3
Exercise of warrants related to stock offering, shares			186
Ending balance at Dec. 31, 2012	98,445	0	460,955	0	(362,187)	(323)
Ending balance, shares at Dec. 31, 2012		0	21,698,115
Comprehensive loss:
Net loss	(1,483)				(1,483)
Other comprehensive income (loss), net of tax	(17,282)					(17,282)
Comprehensive income (loss)	(18,765)
Compensation expense recognized	628		628
Shares issued as compensation to directors	53		53
Shares issued as compensation to directors, shares			5,001
Restricted stock issued, shares			158,302
Ending balance at Dec. 31, 2013	80,361	0	461,636	0	(363,670)	(17,605)
Ending balance, shares at Dec. 31, 2013		0	21,861,418
Comprehensive loss:
Net loss	150,458				150,458
Other comprehensive income (loss), net of tax	10,130					10,130
Comprehensive income (loss)	160,588
Compensation expense recognized	853		853
Expense related to common stock issued	(18)
Issuance of stock	24,982		24,982
Issuance of stock, shares			2,367,425
Reclss of warrant upon expiration of down-round term	56
Shares issued as compensation to directors	76		76
Shares issued as compensation to directors, shares			7,423
Restricted stock issued, shares			(50,343)
Ending balance at Dec. 31, 2014	$ 266,916		$ 487,603	$ 0	$ (213,212)	$ (7,475)
Ending balance, shares at Dec. 31, 2014			24,185,923