Consolidated Statements Of Stockholders' Equity (USD $)	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, 2012	$ 1,557,030,000	$ 149,000	$ 1,329,000,000	$ (2,092,625,000)	$ 2,293,522,000	$ 26,984,000
Balance, shares at Dec. 31, 2012		148,727,000		(67,426,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	83,533,000				83,533,000
Other comprehensive income (loss), net of tax	(62,593,000)					(62,593,000)
Exercise of stock options and vesting of restricted stock units	16,205,000	1,000	16,204,000
Exercise of stock options and vesting of restricted stock units, shares		1,325,000
Share-based compensation expense	16,877,000		16,877,000
Tax benefit (detriment) related to equity compensation plans	(1,332,000)		(1,332,000)
Repurchases of common stock	(85,496,000)			(85,496,000)
Repurchases of common stock, shares				(3,229,000)
Balance at Jun. 30, 2013	1,524,224,000	150,000	1,360,749,000	(2,178,121,000)	2,377,055,000	(35,609,000)
Balance, shares at Jun. 30, 2013		150,052,000		(70,655,000)
Balance at Dec. 31, 2013	1,628,811,000	150,000	1,377,624,000	(2,179,744,000)	2,463,648,000	(32,867,000)
Balance, shares at Dec. 31, 2013		150,224,000		(70,704,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	149,654,000				149,654,000
Other comprehensive income (loss), net of tax	32,416,000					32,416,000
Exercise of stock options and vesting of restricted stock units	12,100,000	2,000	12,098,000
Exercise of stock options and vesting of restricted stock units, shares		1,331,000
Share-based compensation expense	15,700,000		15,700,000
Tax benefit (detriment) related to equity compensation plans	1,346,000		1,346,000
Repurchases of common stock	(18,146,000)			(18,146,000)
Repurchases of common stock, shares				(547,000)
Balance at Jun. 30, 2014	$ 1,821,881,000	$ 152,000	$ 1,406,768,000	$ (2,197,890,000)	$ 2,613,302,000	$ (451,000)
Balance, shares at Jun. 30, 2014		151,555,000		(71,251,000)