CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
ASSETS
Property, plant and equipment	$ 9,017,043	$ 8,447,700
Less accumulated depreciation and amortization	1,804,955	1,721,794
Net property, plant and equipment	7,212,088	6,725,906
Current assets
Cash and cash equivalents	43,153	42,258
Accounts receivable, net	301,743	343,400
Gas stored underground	213,151	278,917
Other current assets	58,602	111,265
Total current assets	616,649	775,840
Goodwill	742,029	742,029
Deferred charges and other assets	313,723	350,929
Total assets	8,884,489	8,594,704
Shareholders' equity
Common stock, no par value (stated at $.005 per share)	507	502
Additional paid-in capital	2,207,102	2,180,151
Retained earnings	1,092,887	917,972
Accumulated other comprehensive income (loss)	(62,241)	(12,393)
Shareholders' equity	3,238,255	3,086,232
Long-term debt	2,455,303	2,455,986
Total capitalization	5,693,558	5,542,218
Current liabilities
Accounts payable and accrued liabilities	227,256	308,086
Other current liabilities	437,344	405,869
Short-term debt	251,977	196,695
Total current liabilities	916,577	910,650
Deferred income taxes	1,429,090	1,286,616
Regulatory cost of removal obligation	432,153	445,387
Pension and postretirement liabilities	318,140	340,963
Deferred credits and other liabilities	94,971	68,870
Total shareholders' equity and liabilities	$ 8,884,489	$ 8,594,704