CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Plant and property, at original cost:
Electric	$ 2,044,092	$ 2,001,142
Natural gas	64,986	63,581
Water	11,444	11,128
Other	34,423	32,264
Construction work in progress	26,612	9,337
Total plant and property, Gross	2,181,557	2,117,452
Accumulated depreciation and amortization	629,997	598,363
Total plant and property, Net	1,551,560	1,519,089
Current assets:
Cash and cash equivalents	8,796	14,499
Accounts receivable - trade, net	51,914	41,380
Accrued unbilled revenues	10,788	23,595
Accounts receivable - other	23,098	25,445
Fuel, materials and supplies	56,898	45,557
Prepaid expenses and other	7,396	5,688
Regulatory assets	8,770	4,974
Total current assets	167,660	161,138
Noncurrent assets and deferred charges:
Regulatory assets	191,484	189,404
Goodwill	39,492	39,492
Unamortized debt issuance costs	9,535	9,257
Other	4,656	2,931
Total noncurrent assets and deferred charges	245,167	241,084
Total Assets	1,964,387	1,921,311
Capitalization and Liabilities
Common stock, $1 par value, 41,955,716 and 41,576,869 shares issued and outstanding, respectively	41,956	41,577
Capital in excess of par value	617,593	610,579
Retained earnings	25,017	5,468
Total common stockholders' equity	684,566	657,624
Long-term debt (net of current portion):
Obligations under capital lease	4,811	4,995
First mortgage bonds and secured debt	488,102	488,577
Unsecured debt	199,554	199,500
Total long-term debt	692,467	693,072
Total long-term debt and common stockholders' equity	1,377,033	1,350,696
Current liabilities:
Accounts payable and accrued liabilities	56,879	58,820
Current maturities of long-term debt	923	881
Short-term debt	4,000	24,000
Customer deposits	11,192	11,061
Interest accrued	12,126	6,004
Other current liabilities	1,181	578
Unrealized loss in fair value of derivative contracts	3,402	760
Taxes accrued	14,046	3,935
Regulatory liabilities	120	1,243
Total current liabilities	103,869	107,282
Commitments and contingencies (Note 7)
Noncurrent liabilities and deferred credits:
Regulatory liabilities	124,444	87,579
Deferred income taxes	247,671	212,003
Unamortized investment tax credits	19,296	19,597
Pension and other postretirement benefit obligations	67,329	93,405
Unrealized loss in fair value of derivative contracts	2,985	3,564
Other	21,760	47,185
Total noncurrent liabilities and deferred credits	483,485	463,333
Total Capitalization and Liabilities	$ 1,964,387	$ 1,921,311