Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock Held in Treasury	Accumulated Other Comprehensive Income/(Loss)	Comprehensive Income
Balance at Dec. 31, 2008	$ 787,380		$ 516	$ 219,830	$ 766,319	$ (193,206)	$ (6,079)
Increase (Decrease) in Stockholders' Equity
Net (loss) income	42,834				42,834			42,834
Other comprehensive income/(loss):
Currency translation adjustment	13,278						13,278	13,278
Net change in securities available-for-sale (net of tax)	(69)						(69)	(69)
Reclassification adjustment for losses recognized in net income (net of tax)	269						269	269
Comprehensive income	56,312							56,312
Issuance of common stock for stock options (111,792 shares), (125,268 shares) and (214,445 shares), restricted share awards (787,399 shares), (317,489 shares) and (183,513 shares) and employee stock unit awards (288,917 shares), (311,106 shares) and (168,248 shares), including tax benefit shortfall of $3.3 million, $2.2 million and $1.5 million for the year 2011, 2010 and 2009, respectively	7,570			(5,545)		13,115
Issuance of common stock for the employee stock purchase plan (108,621 shares), (108,454 shares) and (99,847 shares) for the year 2011, 2010 and 2009, respectively	1,833		1	1,832
Shares withheld for net settlements of share-based awards (369,099 shares), (235,075 shares) and (119,801 shares) for the year 2011, 2010 and 2009, respectively	(2,652)					(2,652)
Share-based compensation	17,257			17,257
Balance at Dec. 31, 2009	867,700		517	233,374	809,153	(182,743)	7,399
Increase (Decrease) in Stockholders' Equity
Net (loss) income	23,980				23,980			23,980
Other comprehensive income/(loss):
Currency translation adjustment	2,939						2,939	2,939
Net change in securities available-for-sale (net of tax)	155						155	155
Comprehensive income	27,074							27,074
Issuance of common stock for stock options (111,792 shares), (125,268 shares) and (214,445 shares), restricted share awards (787,399 shares), (317,489 shares) and (183,513 shares) and employee stock unit awards (288,917 shares), (311,106 shares) and (168,248 shares), including tax benefit shortfall of $3.3 million, $2.2 million and $1.5 million for the year 2011, 2010 and 2009, respectively	7,036			(9,925)		16,961
Issuance of common stock for the employee stock purchase plan (108,621 shares), (108,454 shares) and (99,847 shares) for the year 2011, 2010 and 2009, respectively	1,651		1	1,650
Majestic acquisition replacement awards	2,994			2,994
Purchase of common stock for treasury (2,974,200 shares) and (3,151,828 shares) for the Year 2011 and 2010 respectively	(50,284)					(50,284)
Shares withheld for net settlements of share-based awards (369,099 shares), (235,075 shares) and (119,801 shares) for the year 2011, 2010 and 2009, respectively	(4,095)					(4,095)
Share-based compensation	17,992			17,992
Balance at Dec. 31, 2010	870,068		518	246,085	833,133	(220,161)	10,493
Increase (Decrease) in Stockholders' Equity
Net (loss) income	(179,789)				(179,789)			(179,789)
Other comprehensive income/(loss):
Currency translation adjustment	(2,066)						(2,066)	(2,066)
Net change in securities available-for-sale (net of tax)	(86)						(86)	(86)
Comprehensive income	(181,941)							(181,941)
Issuance of common stock for stock options (111,792 shares), (125,268 shares) and (214,445 shares), restricted share awards (787,399 shares), (317,489 shares) and (183,513 shares) and employee stock unit awards (288,917 shares), (311,106 shares) and (168,248 shares), including tax benefit shortfall of $3.3 million, $2.2 million and $1.5 million for the year 2011, 2010 and 2009, respectively	5,229			(19,285)		24,514
Issuance of common stock for the employee stock purchase plan (108,621 shares), (108,454 shares) and (99,847 shares) for the year 2011, 2010 and 2009, respectively	1,254		1	1,253
Purchase of common stock for treasury (2,974,200 shares) and (3,151,828 shares) for the Year 2011 and 2010 respectively	(38,928)					(38,928)
Shares withheld for net settlements of share-based awards (369,099 shares), (235,075 shares) and (119,801 shares) for the year 2011, 2010 and 2009, respectively	(5,984)					(5,984)
Share-based compensation	21,416			21,416
Balance at Dec. 31, 2011	$ 671,114	$ 0	$ 519	$ 249,469	$ 653,344	$ (240,559)	$ 8,341