Income Taxes (Schedule Of Income Tax Reconciliation By Applying Federal Income Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
U.S. Income (Loss) Before Income Taxes	$ (698,977)	$ 488,593	$ 432,333
Income Tax Expense (Benefit), Computed at U.S. Federal Statutory Rate of 35%	(244,642)	171,008	151,317
State Income Taxes (Benefit)	(64,912)	25,280	27,997
Miscellaneous	(9,996)	(7,108)	(6,982)
Total Income Taxes	$ (319,550)	$ 189,180	$ 172,332
Federal Statutory Rate	35.00%	35.00%	35.00%