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Income Taxes (Schedule Of Income Tax Reconciliation By Applying Federal Income Tax Rate) (Details) - USD ($)
$ in Thousands
9 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Income Tax Disclosure [Abstract]    
U.S. Income (Loss) Before Income Taxes $ 382,971 $ (580,412)
Income Tax Expense (Benefit), Computed at U.S. Federal Statutory Rate of 35% 134,040 (203,144)
State Income Taxes (Benefit) 22,230 (43,248)
Miscellaneous (11,205) (5,510)
Total Income Taxes $ 145,065 $ (251,902)
Federal Statutory Rate 35.00% 35.00%