Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Balance at Dec. 31, 2009	$ 2,530,989	$ 441,369	$ 1,684,694	$ (1,555,046)	$ 2,339,506	$ (379,534)
Net Income	684,863				684,863
Other comprehensive (loss) income, net of tax	20,335					20,335
Purchase of treasury stock	(446,704)			(446,704)
Issuance of treasury stock for stock option exercises	73,364		(20,623)	93,987
Other issuance of treasury stock	100		15	85
Restricted stock units	(10,547)		(32,293)	21,746
Deferred compensation	4,814			5,240	(426)
Share-based compensation	67,138		67,138
Tax benefits from share-based payment arrangements	7,530		7,530
Dividend equivalents for restricted stock units	(3,342)				(3,342)
Dividends	(291,256)				(291,256)
Adjustment for adoption of ASU 2010-11, net of tax	(8,700)				(8,700)
Balance at Dec. 31, 2010	2,628,584	441,369	1,706,461	(1,880,692)	2,720,645	(359,199)
Net Income	768,508				768,508
Other comprehensive (loss) income, net of tax	(87,446)					(87,446)
Purchase of treasury stock	(536,318)			(536,318)
Issuance of treasury stock for stock option exercises	115,611		(9,758)	125,369
Restricted stock units	(36,101)		(84,631)	48,530
Deferred compensation	150			589	(439)
Share-based compensation	53,476		53,476
Tax benefits from share-based payment arrangements	24,199		24,199
Dividend equivalents for restricted stock units	(3,557)		658		(4,215)
Dividends	(316,503)				(316,503)
Balance at Dec. 31, 2011	2,610,603	441,369	1,690,405	(2,242,522)	3,167,996	(446,645)
Net Income	776,464				776,464
Other comprehensive (loss) income, net of tax	(17,841)					(17,841)
Purchase of treasury stock	(77,946)			(77,946)
Issuance of treasury stock for stock option exercises	123,092		(13,702)	136,794
Restricted stock units	(19,154)		(49,385)	30,231
Deferred compensation	160			741	(581)
Share-based compensation	63,277		63,277
Tax benefits from share-based payment arrangements	35,798		35,798
Dividend equivalents for restricted stock units	(4,031)		1,289		(5,320)
Dividends	(423,378)				(423,378)
Balance at Dec. 31, 2012	$ 3,067,044	$ 441,369	$ 1,727,682	$ (2,152,702)	$ 3,515,181	$ (464,486)