BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2011
ASSETS
Utility Plant	$ 1,400,001	$ 1,338,568	$ 1,386,590
Less: Accumulated depreciation and amortization	463,148	447,582	457,907
Net Utility Plant	936,853	890,986	928,683
Other Property and Investments	48,859	46,332	46,950
Current Assets:
Cash and cash equivalents	1,341	1,208	923
Accounts receivable:
Utility	135,758	165,171	71,090
Non-utility	1,865	732	1,347
Associated companies	6,889	5,947	426
Other	11,167	6,665	6,935
Allowance for doubtful accounts	(5,885)	(6,628)	(9,969)
Inventories:
Natural gas stored underground at LIFO cost	113,668	109,171	115,170
Propane gas at FIFO cost	8,964	16,881	8,961
Materials, supplies, and merchandise at average cost	4,730	4,130	4,104
Derivative instrument assets	0	10,415	4,746
Unamortized purchased gas adjustments	19,413	18,136	25,719
Prepayments and other	7,989	5,920	8,527
Total Current Assets	305,899	337,748	237,979
Deferred Charges:
Regulatory assets	458,648	453,030	423,492
Other	5,776	7,100	5,942
Total Deferred Charges	464,424	460,130	429,434
Total Assets	1,756,035	1,735,196	1,643,046
Capitalization:
Common stock and Paid-in capital (11,728, 11,684, and 11,717 shares issued, respectively)	213,415	209,238	212,970
Retained earnings	235,832	218,373	223,460
Accumulated other comprehensive loss	(2,395)	(2,733)	(2,473)
Total Common Stock Equity	446,852	424,878	433,957
Long-term debt (less current portion)	339,372	364,313	364,357
Total Capitalization	786,224	789,191	798,314
Current Liabilities:
Notes payable	113,000	97,450	46,000
Notes payable - associated companies	62,822	68,910	52,879
Accounts payable	54,367	68,625	45,635
Accounts payable - associated companies	5	5	1,730
Advance customer billings	11,600	9,639	15,230
Current portion of long-term debt	25,000	0	0
Wages and compensation accrued	12,529	12,406	13,650
Dividends payable	9,325	9,062	9,084
Customer deposits	10,080	11,315	10,048
Interest accrued	5,519	5,756	8,812
Taxes accrued	14,545	18,670	10,038
Deferred income taxes	8,204	4,159	9,165
Other	20,900	23,781	9,191
Total Current Liabilities	347,896	329,778	231,462
Deferred Credits and Other Liabilities:
Deferred income taxes	335,176	298,176	315,325
Unamortized investment tax credits	3,272	3,485	3,326
Pension and postretirement benefit costs	172,791	210,642	185,701
Asset retirement obligations	27,895	26,215	27,486
Regulatory liabilities	51,904	47,898	50,846
Other	30,877	29,811	30,586
Total Deferred Credits and Other Liabilities	621,915	616,227	613,270
Commitments and Contingencies (Note 8)
Total Capitalization and Liabilities	$ 1,756,035	$ 1,735,196	$ 1,643,046