CONDENSED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Property, Plant and Equipment:
Utility Plant, at original cost	$ 2,042,333		$ 2,002,966
Accumulated Depreciation	(419,223)		(413,597)
Property, Plant and Equipment - Net	1,623,110		1,589,369
Investments:
Available-for-Sale Securities	9,048		8,894
Restricted Investments	8,898		7,961
Total Investments	17,946		16,855
Current Assets:
Cash and Cash Equivalents	4,224		1,778
Accounts Receivable	164,014		60,535
Accounts Receivable - Related Parties	23,430		1,157
Unbilled Revenues	47,629		49,910
Provision for Uncollectibles	(8,620)		(6,601)
Natural Gas in Storage, average cost	5,611		25,325
Materials and Supplies, average cost	1,106		1,104
Deferred Income Taxes - Net	37,472		44,064
Prepaid Taxes	3,374		13,601
Derivatives - Energy Related Assets	1		2,051
Other Prepayments and Current Assets	10,018		3,688
Total Current Assets	288,259		196,612
Regulatory and Other Noncurrent Assets:
Regulatory Assets	335,009		357,160
Unamortized Debt Issuance Costs	7,186		7,382
Long-Term Receivables	17,679		15,223
Other	2,731		3,071
Total Regulatory and Other Noncurrent Assets	362,605		382,836
Total Assets	2,291,920		2,185,672
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	250,899		250,899
Accumulated Other Comprehensive Loss	(14,423)	[1]	(14,479)	[1]
Retained Earnings	480,887		438,300
Total Common Equity	723,211		680,568
Long-Term Debt	507,091		507,091
Total Capitalization	1,230,302		1,187,659
Current Liabilities:
Notes Payable	129,600		101,400
Current Portion of Long-Term Debt	35,909		35,909
Accounts Payable - Commodity	24,286		22,359
Accounts Payable - Other	36,102		32,711
Accounts Payable - Related Parties	11,092		11,249
Derivatives - Energy Related Liabilities	5,781		6,305
Customer Deposits and Credit Balances	15,391		17,626
Environmental Remediation Costs	36,498		28,480
Taxes Accrued	8,274		1,177
Pension Benefits	1,515		1,515
Interest Accrued	4,944		6,099
Other Current Liabilities	4,706		6,580
Total Current Liabilities	314,098		271,410
Regulatory and Other Noncurrent Liabilities:
Regulatory Liabilities	66,526		41,899
Deferred Income Taxes - Net	451,120		435,022
Environmental Remediation Costs	88,263		95,828
Asset Retirement Obligations	42,069		41,976
Pension and Other Postretirement Benefits	82,442		95,241
Investment Tax Credits	111		149
Derivatives - Energy Related Liabilities	1,016		1,298
Derivatives - Other	8,330		7,325
Other	7,643		7,865
Total Regulatory and Other Noncurrent Liabilities	747,520		726,603
Commitments and Contingencies
Total Capitalization and Liabilities	$ 2,291,920		$ 2,185,672

[1] Determined using a combined average statutory tax rate of 40%.