CONDENSED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment:
Utility Plant, at original cost	$ 1,553,865	$ 1,515,274
Accumulated Depreciation	(363,060)	(357,245)
Property, Plant and Equipment - Net	1,190,805	1,158,029
Investments:
Available-for-Sale Securities	7,240	6,655
Restricted Investments	2,896	2,198
Total Investments	10,136	8,853
Current Assets:
Cash and Cash Equivalents	3,565	3,504
Accounts Receivable	62,576	24,800
Accounts Receivable - Related Parties	1,218	1,122
Unbilled Revenues	20,833	31,978
Provision for Uncollectibles	(3,229)	(3,060)
Natural Gas in Storage, average cost	7,783	27,251
Materials and Supplies, average cost	1,740	1,654
Deferred Income Taxes - Net	0	6,301
Prepaid Taxes	4,021	17,296
Derivatives - Energy Related Assets	1,181	2,263
Other Prepayments and Current Assets	3,384	3,773
Total Current Assets	103,072	116,882
Regulatory and Other Noncurrent Assets:
Regulatory Assets	314,448	315,221
Unamortized Debt Issuance Costs	6,445	6,198
Long-Term Receivables	8,652	8,345
Derivatives - Energy Related Assets	99	0
Other	2,326	2,195
Total Regulatory and Other Noncurrent Assets	331,970	331,959
Total Assets	1,635,983	1,615,723
Common Equity:
Common Stock, Par Value $2.50 per share: Authorized - 4,000,000 shares Outstanding - 2,339,139 shares	5,848	5,848
Other Paid-In Capital and Premium on Common Stock	200,926	200,926
Accumulated Other Comprehensive Loss	(11,771)	(12,129)
Retained Earnings	304,579	269,541
Total Common Equity	499,582	464,186
Long-Term Debt	365,000	362,813
Total Capitalization	864,582	826,999
Current Liabilities:
Notes Payable	121,100	126,600
Current Portion of Long-Term Debt	0	2,187
Accounts Payable - Commodity	15,006	17,867
Accounts Payable - Other	29,488	28,280
Accounts Payable - Related Parties	5,758	6,571
Derivatives - Energy Related Liabilities	14,412	11,385
Deferred Income Taxes - Net	546	0
Customer Deposits and Credit Balances	17,966	24,387
Environmental Remediation Costs	16,720	23,009
Taxes Accrued	5,053	1,774
Pension Benefits	1,240	1,240
Interest Accrued	4,726	6,240
Other Current Liabilities	5,090	6,016
Total Current Liabilities	237,105	255,556
Regulatory and Other Noncurrent Liabilities:
Regulatory Liabilities	48,822	48,311
Deferred Income Taxes - Net	301,083	285,159
Environmental Remediation Costs	71,650	66,975
Asset Retirement Obligations	29,447	29,388
Pension and Other Postretirement Benefits	71,911	90,055
Investment Tax Credits	833	905
Derivatives - Energy Related Liabilities	1,027	1,122
Derivatives - Other	6,601	8,146
Other	2,922	3,107
Total Regulatory and Other Noncurrent Liabilities	534,296	533,168
Commitments and Contingencies (Note 9)
Total Capitalization and Liabilities	$ 1,635,983	$ 1,615,723