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Income Taxes (Schedule Of Income Tax Reconciliation By Applying Federal Income Tax Rate) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2012
Income Tax Disclosure [Abstract]      
U.S. Income Before Income Taxes $ 488,593 $ 432,333 $ 370,050
Income Tax Expense, Computed at U.S. Federal Statutory Rate of 35% 171,008 151,317 129,518
Increase (Reduction) in Taxes Resulting from State Income Taxes 25,280 27,997 25,601
Increase (Reduction) in Taxes Resulting From Miscellaneous (7,108) (6,982) (5,146)
Total Income Taxes $ 189,180 $ 172,332 $ 149,973
Federal Statutory Rate 35.00% 35.00% 35.00%