CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Plant and property, at original cost:
Electric	$ 2,032,740	$ 2,001,142
Natural gas	63,973	63,581
Water	11,351	11,128
Other	33,472	32,264
Construction work in progress	20,916	9,337
Total plant and property, Gross	2,162,452	2,117,452
Accumulated depreciation and amortization	622,697	598,363
Total plant and property, Net	1,539,755	1,519,089
Current assets:
Cash and cash equivalents	8,038	14,499
Accounts receivable - trade, net	44,500	41,380
Accrued unbilled revenues	18,559	23,595
Accounts receivable - other	14,941	25,445
Fuel, materials and supplies	50,157	45,557
Prepaid expenses and other	5,991	5,688
Regulatory assets	1,564	4,974
Total current assets	143,750	161,138
Noncurrent assets and deferred charges:
Regulatory assets	193,843	189,404
Goodwill	39,492	39,492
Unamortized debt issuance costs	9,700	9,257
Other	4,443	2,931
Total noncurrent assets and deferred charges	247,478	241,084
Total Assets	1,930,983	1,921,311
Capitalization and Liabilities
Common stock, $1 par value, 41,918,432 and 41,576,869 shares issued and outstanding, respectively	41,918	41,577
Capital in excess of par value	616,547	610,579
(Accumulated deficit)/retained earnings	(167)	5,468
Total common stockholders' equity	658,298	657,624
Long-term debt (net of current portion):
Obligations under capital lease	4,882	4,995
First mortgage bonds and secured debt	488,279	488,577
Unsecured debt	199,536	199,500
Total long-term debt	692,697	693,072
Total long-term debt and common stockholders' equity	1,350,995	1,350,696
Current liabilities:
Accounts payable and accrued liabilities	57,811	58,820
Current maturities of long-term debt	902	881
Short-term debt	18,500	24,000
Customer deposits	11,021	11,061
Interest accrued	6,159	6,004
Other current liabilities	1,181	578
Unrealized loss in fair value of derivative contracts	1,264	760
Taxes accrued	9,945	3,935
Regulatory liabilities	264	1,243
Total current liabilities	107,047	107,282
Commitments and contingencies (Note 7)
Noncurrent liabilities and deferred credits:
Regulatory liabilities	123,840	87,579
Deferred income taxes	226,377	212,003
Unamortized investment tax credits	19,449	19,597
Pension and other postretirement benefit obligations	78,345	93,405
Unrealized loss in fair value of derivative contracts	3,392	3,564
Other	21,538	47,185
Total noncurrent liabilities and deferred credits	472,941	463,333
Total Capitalization and Liabilities	$ 1,930,983	$ 1,921,311