Stock-Based Compensation (Schedule Of Stock-Based Compensation Expense And Realized Excess Tax Benefits) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Selling and administrative expenses	$ 94,179	$ 91,070	$ 295,209	$ 270,509
Income before income taxes	103,820	63,458	281,217	155,968
Provision for income taxes	(29,543)	(16,610)	(79,345)	(38,943)
Net income	74,277	46,848	201,872	117,025
Net cash provided by operating activities			211,516	153,167
Net cash used in financing activities			(183,364)	(65,149)
Stock-Based Compensation [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Selling and administrative expenses	1,058	1,103	5,320	4,125
Total stock-based compensation expense included in operating expenses	1,058	1,103	5,320	4,125
Income before income taxes	(1,058)	(1,103)	(5,320)	(4,125)
Provision for income taxes	279	327	1,511	1,291
Net income	(779)	(776)	(3,809)	(2,834)
Net cash provided by operating activities	(300)	(482)	(2,537)	(2,385)
Net cash used in financing activities	$ 300	$ 482	$ 2,537	$ 2,385