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Income Taxes (Schedule Of Income Tax Reconciliation By Applying Federal Income Tax Rate) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Income Taxes [Abstract]    
U.S. Income Before Income Taxes $ 111,386 $ 101,279
Income Tax Expense, Computed at U.S. Federal Statutory Rate of 35% 38,985 35,448
Increase (Reduction) in Taxes Resulting from State Income Taxes 5,620 6,106
Increase (Reduction) in Taxes Resulting From Miscellaneous (1,163) (974)
Total Income Taxes $ 43,442 $ 40,580
Federal Statutory Rate 35.00% 35.00%