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Income Taxes (Components Of Federal And State Income Taxes Included In The Consolidated Statements Of Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Taxes [Abstract]
Current Income Taxes - Federal			$ (518)	$ 0
Current Income Taxes - State			3,934	6,878
Deferred Income Taxes - Federal			105,362	85,910
Deferred Income Taxes - State			35,645	19,038
Income Tax Expense	45,688	26,228	144,423	111,826
Deferred Investment Tax Credit			(320)	(436)
Total Income Taxes			144,103	111,390
Other Income			(320)	(436)
Income Tax Expense	$ 45,688	$ 26,228	$ 144,423	$ 111,826

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.