Regulatory Assets and Liabilities and Regulatory Matters (Tables)

12 Months Ended

Sep. 30, 2015

Regulated Operations [Abstract]

Schedule Of Regulatory Assets and Liabilities Associated with Gas Utility and Electric Utility

The following regulatory assets and liabilities associated with Utilities are included in our accompanying Consolidated Balance Sheets at September 30:

	2015		2014
Regulatory assets:
Income taxes recoverable	$	115,946	$	110,709
Underfunded pension and postretirement plans	140,762		110,116
Environmental costs	19,983		14,616
Deferred fuel and power costs	—		11,732
Removal costs, net	21,223		16,790
Other	6,294		4,203
Total regulatory assets	$	304,208	$	268,166
Regulatory liabilities (a):
Postretirement benefits	$	19,975	$	18,594
Environmental overcollections	—		349
Deferred fuel and power refunds	36,638		306
State tax benefits — distribution system repairs	13,266		10,076
Other	1,125		3,172
Total regulatory liabilities	$	71,004	$	32,497

(a) Regulatory liabilities, other than deferred fuel and power refunds, are recorded in other current and noncurrent liabilities in the Consolidated Balance Sheets.