Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balance, Beginning of Period at Dec. 31, 2009	$ 490,283	$ 622	$ 703,590	$ (174,245)	$ (39,684)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(5,325)			(5,325)
Other comprehensive loss	(14,433)				(14,433)
Stock repurchase	(20,037)	(18)	(20,019)
Employee stock purchase plan issuances	1,538		1,538
Other stock-based activity	9,203	21	9,182
Balance, End of Period at Dec. 31, 2010	461,229	625	694,291	(179,570)	(54,117)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(30,757)			(30,757)
Other comprehensive loss	(25,360)				(25,360)
Stock repurchase	(10,019)	(9)	(10,010)
Employee stock purchase plan issuances	2,002		2,002
Other stock-based activity	11,334	20	11,314
Balance, End of Period at Dec. 31, 2011	408,429	636	697,597	(210,327)	(79,477)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(282,503)			(282,503)
Other comprehensive loss	(7,467)				(7,467)
Employee stock purchase plan issuances	2,396		2,396
Other stock-based activity	5,765	3	5,762
Balance, End of Period at Dec. 31, 2012	$ 126,620	$ 639	$ 705,755	$ (492,830)	$ (86,944)