BALANCE SHEETS (UNAUDITED) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Current assets    
Cash and cash equivalents $ 16,997 $ 650
Accounts receivable, net 84,071 65,030
Accounts receivable from affiliates 3,679 1,314
Accrued unbilled revenues 112,735 104,142
Inventories 31,974 35,575
Regulatory assets 22,462 25,244
Derivative instruments 7,892 7,892
Deferred income taxes 36,367 18,247
Prepayments and other 6,282 7,486
Total current assets 322,459 265,580
Property, plant and equipment, net 2,785,404 2,594,732
Other assets    
Regulatory assets 291,999 294,813
Derivative instruments 50,922 56,841
Other 15,089 11,883
Total other assets 358,010 363,537
Total assets 3,465,873 3,223,849
Current liabilities    
Borrowings under utility money pool arrangement 0 5,000
Accounts payable 124,868 140,412
Accounts payable to affiliates 10,852 11,828
Regulatory liabilities 96,341 57,104
Taxes accrued 33,124 19,910
Accrued interest 25,218 13,842
Dividends payable 16,521 16,913
Derivative instruments 3,601 3,601
Other 30,182 29,841
Total current liabilities 340,707 298,451
Deferred credits and other liabilities    
Deferred income taxes 653,612 596,581
Regulatory liabilities 96,582 105,335
Asset retirement obligations 28,513 27,266
Derivative instruments 38,690 41,391
Pension and employee benefit obligations 65,666 76,307
Other 7,474 8,345
Total deferred credits and other liabilities 890,537 855,225
Commitments and contingencies      
Capitalization    
Long-term debt 1,103,625 993,314
Common stock - 200 shares authorized of $1.00 par value; 100 shares outstanding at Sept. 30, 2012 and Dec. 31, 2011, respectively 0 0
Additional paid in capital 786,973 783,162
Retained earnings 345,406 295,201
Accumulated other comprehensive loss (1,375) (1,504)
Total common stockholder's equity 1,131,004 1,076,859
Total liabilities and equity $ 3,465,873 $ 3,223,849