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, 2010 (As Previously Reported [Member])	$ 162,851	$ 384	$ 95,585	$ 72,157		$ (5,275)
Balance, beginning (Adjustments [Member])	(1,629)		(827)	(802)
Balance, beginning at Dec. 31, 2010	161,222	384	94,758	71,355		(5,275)
Balance, Shares beginning at Dec. 31, 2010 (As Previously Reported [Member])		38,401,989
Balance, Shares beginning at Dec. 31, 2010		38,401,989
Forfeiture of restricted stock	0	0	0	0	0	0
Forfeiture of restricted stock, Shares		(3,465)
Stock-based compensation	2,216		2,216
Issuance of common stock	1,567	10	1,557
Issuance of common stock, Shares		950,586
Exercise of stock options	529		529
Exercise of stock options, Shares	90,005	90,005
Acquisition of treasury stock	(11,793)				(11,793)
Acquisition of treasury stock, Shares		(1,531,540)
Other comprehensive loss, net	(8,268)					(8,268)
Net income (loss)	(11,301)			(11,301)
Net income (loss) at Jan. 01, 2011 (As Previously Reported [Member])	21,793
Net income (loss) (Adjustments [Member])	(33,094)
Balance, ending at Dec. 31, 2011 (As Previously Reported [Member])	166,670
Balance, ending (Adjustments [Member])	(32,498)
Balance, ending at Dec. 31, 2011	134,172	394	99,060	60,054	(11,793)	(13,543)
Balance, Shares ending at Dec. 31, 2011	37,907,575	37,907,575
Stock-based compensation	2,389		2,389
Issuance of common stock	46		46
Issuance of common stock, Shares		4,499
Exercise of stock options	916	2	914
Exercise of stock options, Shares	155,708	155,708
Exercise of warrants, Shares		52
Acquisition of treasury stock	(28,125)				(28,125)
Acquisition of treasury stock, Shares		(2,432,477)
Other comprehensive loss, net	(27,907)					(27,907)
Net income (loss)	110,038			110,038
Net income (loss) at Jan. 01, 2012 (As Previously Reported [Member])	193,301
Net income (loss) (Adjustments [Member])	(83,263)
Balance, ending at Dec. 31, 2012 (As Previously Reported [Member])	310,309
Balance, ending (Adjustments [Member])	(118,780)
Balance, ending at Dec. 31, 2012	191,529	396	102,409	170,092	(39,918)	(41,450)
Balance, Shares ending at Dec. 31, 2012	35,635,357	35,635,357
Stock-based compensation	2,213		2,213
Exercise of stock options	4,546	6	4,540
Exercise of stock options, Shares	579,476	579,476
Exercise of warrants	7,064	4	7,060
Exercise of warrants, Shares		448,281
Acquisition of treasury stock	(51,000)				(51,000)
Acquisition of treasury stock, Shares		(2,614,748)
Other comprehensive loss, net	(8,608)					(8,608)
Net income (loss)	(64,203)			(64,203)
Balance, ending at Dec. 31, 2013	$ 81,541	$ 406	$ 116,222	$ 105,889	$ (90,918)	$ (50,058)
Balance, Shares ending at Dec. 31, 2013	34,048,366	34,048,366