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	490		490
Exercise of stock options	994	1	993
Exercise of stock options, Shares		147,810
Exercise of warrants	12		12
Exercise of warrants, Shares		749
Acquisition of treasury stock	(6,000)				(6,000)
Acquisition of treasury stock, Shares		(375,884)
Other comprehensive income, net	8,321					8,321
Net loss	(17,589)			(17,589)
Balance, ending at Mar. 31, 2013	177,757	397	103,904	152,503	(45,918)	(33,129)
Balance, Shares ending at Mar. 31, 2013		35,408,032
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	617		617
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, net	5,097					5,097
Net loss	(21,605)			(21,605)
Balance, ending at Mar. 31, 2014	$ 65,717	$ 406	$ 116,906	$ 84,284	$ (90,918)	$ (44,961)
Balance, Shares ending at Mar. 31, 2014	34,056,363	34,056,363