Income Taxes (Schedule Of Provision For Income Taxes (Benefit)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Tax Disclosure [Abstract]
Current, U.S. federal									$ 138,372	$ 147,774	$ 103,620
Current, State									14,322	10,733	7,397
Current, Foreign									6,633	4,218	5,743
Total									159,327	162,725	116,760
Deferred, U.S. federal									1,310	(7,320)	3,070
Deferred, State									(203)	187	(144)
Deferred, Foreign									344	1,436	(332)
Total									1,451	(5,697)	2,594
Income taxes (benefit)	$ 49,682	$ 38,773	$ 31,182	$ 41,141	$ 45,026	$ 39,377	$ 37,467	$ 35,158	$ 160,778	$ 157,028	$ 119,354