Income Taxes (Tables)

12 Months Ended

Sep. 30, 2014

Income Tax Disclosure [Abstract]

Components Of Federal And State Income Taxes Included In The Consolidated Statements Of Income

The components of federal and state income taxes included in the Consolidated Statements of Income are as follows:

	Year Ended September 30
	2014			2013			2012
	(Thousands)
Current Income Taxes —
Federal	$	34,579		$	(632	)	$	(8	)
State	12,620			5,503			6,412
Deferred Income Taxes —
Federal	116,143			130,318			111,176
State	26,272			37,569			32,974
	189,614			172,758			150,554
Deferred Investment Tax Credit	(434		)	(426		)	(581		)
Total Income Taxes	$	189,180		$	172,332		$	149,973
Presented as Follows:
Other Income	$	(434	)	$	(426	)	$	(581	)
Income Tax Expense	189,614			172,758			150,554
Total Income Taxes	$	189,180		$	172,332		$	149,973

Schedule Of Income Tax Reconciliation By Applying Federal Income Tax Rate

The following is a reconciliation of this difference:

	Year Ended September 30
	2014			2013			2012
	(Thousands)
U.S. Income Before Income Taxes	$	488,593		$	432,333		$	370,050
Income Tax Expense, Computed at U.S. Federal Statutory Rate of 35%	$	171,008		$	151,317		$	129,518
Increase (Reduction) in Taxes Resulting from:
State Income Taxes	25,280			27,997			25,601
Miscellaneous	(7,108		)	(6,982		)	(5,146		)
Total Income Taxes	$	189,180		$	172,332		$	149,973

Significant Components Of Deferred Tax Liabilities And Assets

Significant components of the Company’s deferred tax liabilities and assets were as follows:

	At September 30
	2014			2013
	(Thousands)
Deferred Tax Liabilities:
Property, Plant and Equipment	$	1,614,515		$	1,504,187
Pension and Other Post-Retirement Benefit Costs	113,248			124,021
Other	87,935			75,419
Total Deferred Tax Liabilities	1,815,698			1,703,627
Deferred Tax Assets:
Pension and Other Post-Retirement Benefit Costs	(124,452		)	(130,256		)
Tax Loss and Credit Carryforwards	(171,423		)	(215,262		)
Other	(103,863		)	(90,461		)
Total Deferred Tax Assets	(399,738		)	(435,979		)
Total Net Deferred Income Taxes	$	1,415,960		$	1,267,648
Presented as Follows:
Deferred Tax Liability/(Asset) — Current	$	(40,323	)	$	(79,359	)
Deferred Tax Liability — Non-Current	1,456,283			1,347,007
Total Net Deferred Income Taxes	$	1,415,960		$	1,267,648

Reconciliation Of The Change In Unrecognized Tax Benefits

The following is a reconciliation of the change in unrecognized tax benefits:

	Year Ended September 30
	2014			2013			2012
	(Thousands)
Balance at Beginning of Year	$	2,001		$	11,170		$	7,766
Additions for Tax Positions Related to Current Year	—			700			1,600
Additions for Tax Positions of Prior Years	2,447			164			2,751
Reductions for Tax Positions of Prior Years	(1,301		)	(10,033		)	(947		)
Balance at End of Year	$	3,147		$	2,001		$	11,170