Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Utility plant:
Electric plant in service	$ 3,658,736	$ 3,616,301
Less accumulated depreciation and amortization	(1,345,255)	(1,329,843)
Net plant in service	2,313,481	2,286,458
Construction work in progress	296,905	293,796
Nuclear fuel; includes fuel in process of $44,474 and $51,854, respectively	202,121	190,282
Less accumulated amortization	(85,990)	(75,031)
Net nuclear fuel	116,131	115,251
Net utility plant	2,726,517	2,695,505
Current assets:
Cash and cash equivalents	41,312	8,149
Accounts receivable, principally trade, net of allowance for doubtful accounts of $1,523 and $2,046, respectively	58,030	66,326
Inventories, at cost	47,639	48,697
Prepayments and other	11,839	9,872
Total current assets	158,820	133,044
Deferred charges and other assets:
Decommissioning trust funds	243,690	239,035
Regulatory assets	113,542	115,127
Other	17,839	17,896
Total deferred charges and other assets	375,071	372,058
Total assets	3,260,408	3,200,607
Capitalization:
Common stock, stated value $1 per share, 100,000,000 shares authorized, 65,670,638 and 65,709,819 shares issued, and 158,015 and 118,834 restricted shares, respectively	65,829	65,829
Capital in excess of stated value	320,047	320,073
Retained earnings	1,049,660	1,067,396
Accumulated other comprehensive loss, net of tax	(13,632)	(13,914)
Total stockholders equity subtotal before treasury stock	1,421,904	1,439,384
Treasury stock, 25,343,838 and 25,384,834 shares, respectively, at cost	(422,163)	(422,846)
Common stock equity	999,741	1,016,538
Long-term debt, net of current portion	1,278,449	1,122,660
Total capitalization	2,278,190	2,139,198
Current liabilities:
Short-term borrowings under the revolving credit facility	87,050	141,738
Accounts payable, principally trade	32,768	59,978
Taxes accrued	26,094	30,351
Interest accrued	19,352	12,649
Over-collection of fuel revenues	8,127	4,023
Other	29,160	28,325
Total current liabilities	202,551	277,064
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	490,939	495,237
Accrued pension liability	89,141	90,527
Accrued post-retirement benefit liability	55,114	54,553
Asset retirement obligation	83,495	81,621
Regulatory liabilities	23,479	24,303
Other	37,499	38,104
Total deferred credits and other liabilities	$ 779,667	$ 784,345
Commitments and contingencies
Total capitalization and liabilities	$ 3,260,408	$ 3,200,607