Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Utility plant:
Electric plant in service	$ 3,746,141	$ 3,616,301
Less accumulated depreciation and amortization	(1,228,659)	(1,329,843)
Net plant in service	2,517,482	2,286,458
Construction work in progress	153,868	293,796
Nuclear fuel; includes fuel in process of $64,292 and $51,854, respectively	201,993	190,282
Less accumulated amortization	(85,895)	(75,031)
Net nuclear fuel	116,098	115,251
Net utility plant	2,787,448	2,695,505
Current assets:
Cash and cash equivalents	10,044	8,149
Accounts receivable, principally trade, net of allowance for doubtful accounts of $2,260 and $2,046, respectively	112,697	66,326
Inventories, at cost	47,498	48,697
Under-collection of fuel revenues	8,962	0
Prepayments and other	12,856	9,872
Total current assets	192,057	133,044
Deferred charges and other assets:
Decommissioning trust funds	254,626	239,035
Regulatory assets	122,054	115,127
Other	16,488	17,896
Total deferred charges and other assets	393,168	372,058
Total assets	3,372,673	3,200,607
Capitalization:
Common stock, stated value $1 per share, 100,000,000 shares authorized, 65,671,235 and 65,709,819 shares issued, and 156,976 and 118,834 restricted shares, respectively	65,828	65,829
Capital in excess of stated value	321,629	320,073
Retained earnings	1,121,487	1,067,396
Accumulated other comprehensive loss, net of tax	(12,337)	(13,914)
Total stockholders' equity subtotal before treasury stock	1,496,607	1,439,384
Treasury stock, 25,305,965 and 25,384,834 shares, respectively, at cost	(421,532)	(422,846)
Common stock equity	1,075,075	1,016,538
Long-term debt, net of current portion	1,195,397	1,122,660
Total capitalization	2,270,472	2,139,198
Current liabilities:
Current maturities of long-term debt	83,081	0
Short-term borrowings under the revolving credit facility	55,192	141,738
Accounts payable, principally trade	70,486	59,978
Taxes accrued	35,127	30,351
Interest accrued	19,349	12,649
Over-collection of fuel revenues	1,219	4,023
Other	29,543	28,325
Total current liabilities	293,997	277,064
Deferred credits and other liabilities:
Accumulated deferred income taxes	549,846	495,237
Accrued pension liability	83,366	90,527
Accrued post-retirement benefit liability	56,398	54,553
Asset retirement obligation	80,086	81,621
Regulatory liabilities	18,495	24,303
Other	20,013	38,104
Total deferred credits and other liabilities	808,204	784,345
Commitments and contingencies
Total capitalization and liabilities	$ 3,372,673	$ 3,200,607