CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
ASSETS
Property, plant and equipment	$ 9,972,415	$ 9,240,100
Less accumulated depreciation and amortization	1,918,868	1,809,520
Net property, plant and equipment	8,053,547	7,430,580
Current assets
Cash and cash equivalents	66,206	28,653
Accounts receivable, net	277,362	295,160
Gas stored underground	244,841	236,603
Other current assets	60,504	65,890
Total current assets	648,913	626,306
Goodwill	742,702	742,702
Deferred charges and other assets	282,206	293,357
Total assets	9,727,368	9,092,945
Shareholders' equity
Common stock, no par value (stated at $.005 per share)	519	507
Additional paid-in capital	2,371,381	2,230,591
Accumulated other comprehensive income (loss)	(178,233)	(109,330)
Retained earnings	1,273,057	1,073,029
Shareholders' equity	3,466,724	3,194,797
Long-term debt	2,205,645	2,455,388
Total capitalization	5,672,369	5,650,185
Current liabilities
Accounts payable and accrued liabilities	198,882	238,942
Other current liabilities	410,452	457,954
Short-term debt	670,466	457,927
Current maturities of long-term debt	250,000	0
Total current liabilities	1,529,800	1,154,823
Deferred income taxes	1,585,500	1,411,315
Regulatory cost of removal obligation	427,332	427,553
Pension and postretirement liabilities	283,579	287,373
Deferred credits and other liabilities	228,788	161,696
Total shareholders' equity and liabilities	$ 9,727,368	$ 9,092,945