Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Utility plant:
Electric plant in service	$ 4,089,896	$ 3,982,095
Less accumulated depreciation and amortization	(1,375,721)	(1,320,175)
Net plant in service	2,714,175	2,661,920
Construction work in progress	207,514	146,059
Nuclear fuel; includes fuel in process of $70,778 and $59,689, respectively	205,991	194,933
Net nuclear fuel	123,151	120,458
Net utility plant	3,044,840	2,928,437
Current assets:
Cash and cash equivalents	15,965	6,990
Accounts receivable, principally trade, net of allowance for doubtful accounts of $2,275 and $2,300, respectively	117,950	88,585
Inventories, at cost	53,078	50,910
Prepayments and other	13,838	10,307
Total current assets	200,831	156,792
Deferred charges and other assets:
Decommissioning trust funds	297,030	286,866
Regulatory assets	83,764	96,036
Other	17,728	16,232
Total deferred charges and other assets	398,522	399,134
Total assets	3,644,193	3,484,363
Capitalization:
Common stock, stated value $1 per share, 100,000,000 shares authorized, 65,672,747 and 65,694,829 shares issued, and 155,941 and 133,859 restricted shares, respectively	65,829	65,829
Capital in excess of stated value	327,320	326,117
Retained earnings	1,257,397	1,159,667
Accumulated other comprehensive income (loss), net of tax	(34,633)	11,058
Total stockholders' equity subtotal before treasury stock	1,615,913	1,562,671
Treasury stock, 25,136,737 and 25,244,350 shares, respectively, at cost	(418,713)	(420,506)
Common stock equity	1,197,200	1,142,165
Long-term debt, net of current portion	1,385,254	1,195,988
Total capitalization	2,582,454	2,338,153
Current liabilities:
Short-term borrowings under the revolving credit facility	19,362	173,533
Accounts payable, principally trade	73,537	59,270
Taxes accrued	42,054	35,660
Interest accrued	20,961	12,470
Over-collection of fuel revenues, regulatory liability	9,905	6,225
Other	38,252	29,067
Total current liabilities	204,071	316,225
Deferred credits and other liabilities:
Accumulated deferred income taxes	325,383	305,023
Accrued pension liability	77,261	83,838
Accrued post-retirement benefit liability	28,130	26,417
Asset retirement obligation	99,144	93,029
Regulatory liabilities	299,431	296,685
Other	28,319	24,993
Total deferred credits and other liabilities	857,668	829,985
Commitments and contingencies
Total capitalization and liabilities	3,644,193	3,484,363
Nuclear Fuel
Utility plant:
Less accumulated depreciation and amortization	$ (82,840)	$ (74,475)