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Income Taxes (Schedule Of Income Tax Reconciliation By Applying Federal Income Tax Rate) (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Income Taxes [Abstract]    
U.S. Income Before Income Taxes $ 282,665 $ 361,726
Income Tax Expense, Computed at U.S. Federal Statutory Rate of 35% 98,933 126,604
Increase (Reduction) in Taxes Resulting from State Income Taxes 16,845 19,919
Increase (Reduction) in Taxes Resulting From Miscellaneous (4,388) (5,842)
Total Income Taxes $ 111,390 $ 140,681
Federal Statutory Rate 35.00% 35.00%