Income Taxes (Schedule Of Income Tax Reconciliation By Applying Federal Income Tax Rate) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]
U.S. Income Before Income Taxes	$ 298,765	$ 252,186
Income Tax Expense, Computed at U.S. Federal Statutory Rate of 35%	104,568	88,265
Increase (Reduction) in Taxes Resulting from State Income Taxes	20,433	14,473
Increase (Reduction) in Taxes Resulting From Miscellaneous	(3,699)	(4,216)
Total Income Taxes	$ 121,302	$ 98,522
Federal Statutory Rate	35.00%	35.00%