CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
ASSETS
Property, plant and equipment	$ 7,446,272	$ 6,860,358
Construction in progress	275,747	274,112
Total property, plant and equipment and construction in progress	7,722,019	7,134,470
Less accumulated depreciation and amortization	1,691,364	1,658,866
Net property, plant and equipment	6,030,655	5,475,604
Current assets
Cash and cash equivalents	66,199	64,239
Accounts receivable, less allowance for doubtful accounts of $20,624 in 2013 and $9,425 in 2012	301,992	234,526
Gas stored underground	244,741	256,415
Other current assets	70,334	272,782
Total current assets	683,266	827,962
Goodwill and intangible assets	741,484	740,847
Deferred charges and other assets	484,996	451,262
Total assets	7,940,401	7,495,675
Shareholders' equity
Common stock, no par value (stated at $.005 per share); 200,000,000 shares authorized; issued and outstanding: 2013 — 90,640,211 shares, 2012 — 90,239,900 shares	453	451
Additional paid-in capital	1,765,811	1,745,467
Accumulated other comprehensive income (loss)	38,878	(47,607)
Retained earnings	775,267	660,932
Shareholders' equity	2,580,409	2,359,243
Long-term debt	2,455,671	1,956,305
Total capitalization	5,036,080	4,315,548
Current liabilities
Accounts payable and accrued liabilities	241,611	215,229
Other current liabilities	368,891	489,665
Short-term debt	367,984	570,929
Current maturities of long-term debt	0	131
Total current liabilities	978,486	1,275,954
Deferred income taxes	1,164,053	1,015,083
Regulatory cost of removal obligation	359,299	381,164
Pension and postretirement liabilities	358,787	457,196
Deferred credits and other liabilities	43,696	50,730
Total shareholders' equity and liabilities	$ 7,940,401	$ 7,495,675