BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Sep. 30, 2011
ASSETS
Utility Plant	$ 1,425,922	$ 1,351,293	$ 1,386,590
Less: Accumulated depreciation and amortization	468,209	453,271	457,907
Net Utility Plant	957,713	898,022	928,683
Other Property and Investments	51,021	49,362	46,950
Current Assets:
Cash and cash equivalents	1,448	1,708	923
Accounts receivable:
Utility	100,015	146,821	71,090
Non-utility	1,961	666	1,347
Associated companies	335	310	426
Other	16,630	6,616	6,935
Allowance for doubtful accounts	(8,655)	(10,991)	(9,969)
Delayed customer billings	13,464	32,398	0
Inventories:
Natural gas stored underground at LIFO cost	55,461	40,225	115,170
Propane gas at FIFO cost	8,964	16,927	8,961
Materials and supplies at average cost	3,976	4,276	4,104
Derivative instrument assets	0	8,035	4,746
Unamortized purchased gas adjustments	11,241	6,470	25,719
Deferred income taxes	0	2,208	0
Prepayments and other	6,579	5,334	8,527
Total Current Assets	211,419	261,003	237,979
Deferred Charges:
Regulatory assets	457,749	420,733	423,492
Other	5,320	6,293	5,942
Total Deferred Charges	463,069	427,026	429,434
Total Assets	1,683,222	1,635,413	1,643,046
Capitalization:
Common stock and Paid-in capital (11,746, 11,694, and 11,717 shares issued, respectively)	214,661	210,223	212,970
Retained earnings	252,430	235,533	223,460
Accumulated other comprehensive loss	(1,652)	(2,548)	(2,473)
Total Common Stock Equity	465,439	443,208	433,957
Long-term debt (less current portion)	339,386	364,327	364,357
Total Capitalization	804,825	807,535	798,314
Current Liabilities:
Notes payable	0	0	46,000
Notes payable - associated companies	107,540	72,720	52,879
Accounts payable	39,939	44,583	45,635
Accounts payable - associated companies	2,672	5,848	1,730
Advance customer billings	0	0	15,230
Current portion of long-term debt	25,000	0	0
Wages and compensation accrued	13,873	13,504	13,650
Dividends payable	9,328	9,072	9,084
Customer deposits	9,459	10,719	10,048
Interest accrued	8,789	9,023	8,812
Taxes accrued	28,859	40,410	10,038
Deferred income taxes	4,848	0	9,165
Other	12,505	9,982	9,191
Total Current Liabilities	262,812	215,861	231,462
Deferred Credits and Other Liabilities:
Deferred income taxes	335,138	293,860	315,325
Unamortized investment tax credits	3,219	3,432	3,326
Pension and postretirement benefit costs	163,940	208,727	185,701
Asset retirement obligations	28,304	26,601	27,486
Regulatory liabilities	53,267	49,077	50,846
Other	31,717	30,320	30,586
Total Deferred Credits and Other Liabilities	615,585	612,017	613,270
Commitments and Contingencies (Note 8)
Total Capitalization and Liabilities	$ 1,683,222	$ 1,635,413	$ 1,643,046