Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]
Balance, beginning at Dec. 31, 2012	$ 191,529	$ 396	$ 102,409	$ 170,092	$ (39,918)	$ (41,450)
Balance, Shares beginning at Dec. 31, 2012		35,635,357
Stock-based compensation	1,558		1,558
Exercise of stock options	4,054	5	4,049
Exercise of stock options, Shares		542,746
Exercise of warrants	5,622	4	5,618
Exercise of warrants, Shares		356,675
Acquisition of treasury stock	(31,000)				(31,000)
Acquisition of treasury stock, Shares		(1,589,401)
Other comprehensive income (loss), net	1,438					1,438
Net loss	(42,006)			(42,006)
Balance, ending at Sep. 30, 2013	131,195	405	113,634	128,086	(70,918)	(40,012)
Balance, Shares ending at Sep. 30, 2013		34,945,377
Balance, beginning at Dec. 31, 2013	81,541	406	116,222	105,889	(90,918)	(50,058)
Balance, Shares beginning at Dec. 31, 2013	34,048,366	34,048,366
Stock-based compensation	1,665		1,665
Exercise of stock options	48		48
Exercise of stock options, Shares		6,795
Exercise of warrants	19		19
Exercise of warrants, Shares		1,202
Other comprehensive income (loss), net	(5,953)					(5,953)
Net loss	(53,402)			(53,402)
Balance, ending at Sep. 30, 2014	$ 23,918	$ 406	$ 117,954	$ 52,487	$ (90,918)	$ (56,011)
Balance, Shares ending at Sep. 30, 2014	34,056,363	34,056,363