CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Utility plant:    
Utility plant $ 2,373,167 $ 2,342,471
Less accumulated depreciation and amortization (766,545) (752,040)
Net utility plant 1,606,622 1,590,431
Current assets:    
Cash and cash equivalents 33,311 19,587
Receivables:    
Customers 24,327 25,803
Regulatory balancing accounts 50,016 53,199
Other 13,349 14,136
Unbilled revenue 22,599 23,740
Materials and supplies at weighted average cost 6,158 6,041
Taxes, prepaid expenses and other assets 9,495 11,618
Total current assets 159,255 154,124
Other assets:    
Regulatory assets 401,089 390,331
Goodwill 2,615 2,615
Other assets 51,164 49,850
Total other assets 454,868 442,796
Total assets 2,220,745 2,187,351
Capitalization:    
Common stock, $.01 par value; 68,000 shares authorized, 47,880 and 47,806 outstanding in 2015 and 2014, respectively 479 478
Additional paid-in capital 331,029 330,558
Retained earnings 289,158 295,590
Total common stockholders' equity 620,666 626,626
Long-term debt, less current maturities 419,014 419,233
Total capitalization 1,039,680 1,045,859
Current liabilities:    
Current maturities of long-term debt 6,596 6,607
Short-term borrowings 109,115 79,115
Accounts payable 57,684 59,395
Regulatory balancing accounts 5,580 6,126
Accrued interest 9,583 4,194
Accrued expenses and other liabilities 65,385 62,269
Total current liabilities 253,943 217,706
Unamortized investment tax credits 2,032 2,032
Deferred income taxes, net 214,814 214,842
Pension and postretirement benefits other than pensions 277,094 270,865
Regulatory and other liabilities 81,499 83,279
Advances for construction 181,553 182,284
Contributions in aid of construction 170,130 170,484
Commitments and contingencies (Note 10)      
Total capitalization and liabilities $ 2,220,745 $ 2,187,351