Consolidated Balance Sheets (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Property, plant and equipment  
Utility plant-at original cost, net of accumulated depreciation of $3,299,029 at September 30 and $3,134,094 at December 31$ 10,647,307$ 10,241,342
Nonutility property, net of accumulated depreciation of $161,955 at September 30 and $142,902 at December 31140,537142,554
Total property, plant and equipment10,787,84410,383,896
Current assets  
Cash and cash equivalents15,62113,112
Restricted funds46,86494,066
Utility customer accounts receivable184,235145,747
Allowance for uncollectible accounts(17,426)(17,474)
Unbilled utility revenues142,302132,876
Other receivables, net62,93474,028
Income taxes receivable1346,473
Materials and supplies30,49127,743
Assets of discontinued operations943,155927,423
Other71,15146,788
Total current assets1,479,4611,450,782
Regulatory and other long-term assets  
Regulatory assets997,511980,911
Restricted funds19,72926,718
Goodwill1,195,5101,195,585
Other58,67848,354
Total regulatory and other long-term assets2,271,4282,251,568
TOTAL ASSETS14,538,73314,086,246
Capitalization  
Common stock ($.01 par value, 500,000 shares authorized, 175,508 and 174,996 shares outstanding at September 30 and December 31, respectively)1,7551,750
Paid-in-capital6,173,7816,156,675
Accumulated deficit(1,848,338)(1,959,235)
Accumulated other comprehensive loss(68,555)(71,446)
Treasury stock0(19)
Common stockholders' equity4,258,6434,127,725
Preferred stock without mandatory redemption requirements4,5474,547
Total stockholders' equity4,263,1904,132,272
Long-term debt  
Long-term debt5,361,5315,394,135
Redeemable preferred stock at redemption value21,98422,135
Total capitalization9,646,7059,548,542
Current liabilities  
Short-term debt408,998228,502
Current portion of long-term debt8,94936,092
Accounts payable190,556191,973
Taxes accrued, including income taxes of $0 at September 30 and December 3147,96237,053
Interest accrued103,18460,465
Liabilities of discontinued operations388,157384,595
Other232,208182,317
Total current liabilities1,380,0141,120,997
Regulatory and other long-term liabilities  
Advances for construction394,956397,164
Deferred income taxes1,235,5541,088,121
Deferred investment tax credits29,81330,969
Regulatory liabilities309,822296,121
Accrued pension expense340,951421,408
Accrued postretirement benefit expense212,357215,217
Other36,96542,151
Total regulatory and other long-term liabilities2,560,4182,491,151
Contributions in aid of construction951,596925,556
Commitments and contingencies (See Note 9)  
TOTAL CAPITALIZATION AND LIABILITIES$ 14,538,733$ 14,086,246