Income Taxes (Schedule Of Provision For Income Taxes (Benefit)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Current, U.S. federal									$ 164,994	$ 138,372	$ 147,774
Current, State									15,462	14,322	10,733
Current, Foreign									13,287	6,633	4,218
Total									193,743	159,327	162,725
Deferred, U.S. federal									(5,778)	1,310	(7,320)
Deferred, State									(83)	(203)	187
Deferred, Foreign									(1,723)	344	1,436
Total									(7,584)	1,451	(5,697)
Income taxes (benefit)	$ 55,783	$ 47,799	$ 41,246	$ 41,331	$ 49,682	$ 38,773	$ 31,182	$ 41,141	$ 186,159	$ 160,778	$ 157,028