Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Utility plant:
Electric plant in service	$ 3,113,909	$ 3,076,549
Less accumulated depreciation and amortization	(1,233,926)	(1,214,088)
Net plant in service	1,879,983	1,862,461
Construction work in progress	347,412	282,647
Nuclear fuel; includes fuel in process of $46,404 and $48,492, respectively	184,110	188,185
Less accumulated amortization	(73,458)	(75,820)
Net nuclear fuel	110,652	112,365
Net utility plant	2,338,047	2,257,473
Current assets:
Cash and cash equivalents	12,696	25,592
Accounts receivable, principally trade, net of allowance for doubtful accounts of $1,738 and $2,261, respectively	98,935	65,350
Accumulated deferred income taxes	6,838	26,965
Inventories, at cost	45,400	45,942
Undercollection of fuel revenues	19,569	7,248
Prepayments and other	11,453	7,694
Total current assets	194,891	178,791
Deferred charges and other assets:
Decommissioning trust funds	225,713	214,095
Regulatory assets	97,319	101,050
Other	33,052	34,879
Total deferred charges and other assets	356,084	350,024
Total assets	2,889,022	2,786,288
Capitalization:
Common stock, stated value $1 per share, 100,000,000 shares authorized, 65,706,047 and 65,639,091 shares issued, and 138,896 and 120,534 restricted shares, respectively	65,845	65,760
Capital in excess of stated value	316,493	314,443
Retained earnings	998,407	985,665
Accumulated other comprehensive income, net of tax	17,730	2,612
Total stockholders equity subtotal before treasury stock	1,398,475	1,368,480
Treasury stock, 25,492,919 shares at cost	(424,647)	(424,647)
Common stock equity	973,828	943,833
Long-term debt	999,665	999,620
Total capitalization	1,973,493	1,943,453
Current liabilities:
Short-term borrowings under the revolving credit facility	97,772	14,352
Accounts payable, principally trade	66,008	61,795
Taxes accrued	20,838	25,206
Interest accrued	12,225	12,189
Overcollection of fuel revenues	0	1,048
Other	25,268	22,932
Total current liabilities	222,111	137,522
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	455,620	449,925
Accrued pension liability	60,070	84,012
Accrued postretirement benefit liability	53,256	50,655
Asset retirement obligation	68,115	65,214
Regulatory liabilities	26,116	26,416
Other	30,241	29,091
Total deferred credits and other liabilities	693,418	705,313
Commitments and contingencies
Total capitalization and liabilities	$ 2,889,022	$ 2,786,288