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)	50,050,000				50,050,000
Other comprehensive income (loss), net of tax	(16,708,000)					(16,708,000)
Exercise of stock options and vesting of restricted stock units	14,777,000	1,000	14,776,000
Exercise of stock options and vesting of restricted stock units, shares		1,246,000
Share-based compensation expense	9,935,000		9,935,000
Tax benefit (detriment) related to equity compensation plans	(1,253,000)		(1,253,000)
Repurchases of common stock	(85,215,000)			(85,215,000)
Repurchases of common stock, shares				(3,220,000)
Balance at Mar. 31, 2013	1,528,616,000	150,000	1,352,458,000	(2,177,840,000)	2,343,572,000	10,276,000
Balance, shares at Mar. 31, 2013		149,973,000		(70,646,000)
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)	28,787,000				28,787,000
Other comprehensive income (loss), net of tax	18,357,000					18,357,000
Exercise of stock options and vesting of restricted stock units	10,248,000	2,000	10,246,000
Exercise of stock options and vesting of restricted stock units, shares		1,218,000
Share-based compensation expense	9,164,000		9,164,000
Tax benefit (detriment) related to equity compensation plans	928,000		928,000
Repurchases of common stock	(17,794,000)			(17,794,000)
Repurchases of common stock, shares				(538,000)
Balance at Mar. 31, 2014	$ 1,678,501,000	$ 152,000	$ 1,397,962,000	$ (2,197,538,000)	$ 2,492,435,000	$ (14,510,000)
Balance, shares at Mar. 31, 2014		151,442,000		(71,242,000)