Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Common Stock Held In Treasury [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2011	$ 1,443,146	$ 147	$ 1,278,037	$ (2,023,129)	$ 2,171,459	$ 16,632
Balance, shares at Dec. 31, 2011		146,804,000		(64,847,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	116,052				116,052
Other comprehensive income (loss)	11,299					11,299
Exercise of stock options and vesting of restricted stock units	16,589	2	16,587
Exercise of stock options and vesting of restricted stock units, shares		1,885,000
Share-based compensation expense	23,413		23,413
Tax benefit (detriment) related to equity compensation plans	5,113		5,113
Repurchases of common stock	(69,330)			(69,330)
Repurchases of common stock, shares				(2,572,000)
Balance at Sep. 30, 2012	1,546,282	149	1,323,150	(2,092,459)	2,287,511	27,931
Balance, shares at Sep. 30, 2012		148,689,000		(67,419,000)
Balance at Dec. 31, 2012	1,557,030	149	1,329,000	(2,092,625)	2,293,522	26,984
Balance, shares at Dec. 31, 2012		148,727,000		(67,426,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	150,373				150,373
Other comprehensive income (loss)	(61,679)					(61,679)
Exercise of stock options and vesting of restricted stock units	19,951	1	19,950
Exercise of stock options and vesting of restricted stock units, shares		1,466,000
Share-based compensation expense	23,388		23,388
Tax benefit (detriment) related to equity compensation plans	(1,594)		(1,594)
Repurchases of common stock	(86,878)			(86,878)
Repurchases of common stock, shares				(3,270,000)
Balance at Sep. 30, 2013	$ 1,600,591	$ 150	$ 1,370,744	$ (2,179,503)	$ 2,443,895	$ (34,695)
Balance, shares at Sep. 30, 2013		150,193,000		(70,696,000)