Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Utility plant:
Electric plant in service	$ 4,328,915	$ 4,181,409
Less accumulated depreciation and amortization	(1,452,972)	(1,391,266)
Net plant in service	2,875,943	2,790,143
Construction work in progress	180,502	169,327
Nuclear fuel; includes fuel in process of $43,315 and $62,833, respectively	198,773	198,280
Net nuclear fuel	117,753	125,577
Net utility plant	3,174,198	3,085,047
Current assets:
Cash and cash equivalents	15,597	12,900
Accounts receivable, principally trade, net of allowance for doubtful accounts of $1,870 and $2,070, respectively	114,610	77,855
Inventories, at cost	59,047	55,432
Regulatory assets	7,939	6,972
Prepayments and other	27,487	20,375
Total current assets	224,680	173,534
Deferred charges and other assets:
Decommissioning trust funds	311,742	276,905
Regulatory assets	72,346	74,848
Other	17,263	18,168
Total deferred charges and other assets	401,351	369,921
Total assets	3,800,229	3,628,502
Capitalization:
Common stock, stated value $1 per share, 100,000,000 shares authorized, 64,310,380 and 65,707,156 shares issued, and 118,308 and 121,532 restricted shares, respectively	64,429	65,829
Capital in excess of stated value	322,966	328,480
Retained earnings	1,275,159	1,227,471
Accumulated other comprehensive loss, net of tax	(38,636)	(38,784)
Total stockholders' equity subtotal before treasury stock	1,623,918	1,582,996
Treasury stock, 23,693,527 and 25,147,567 shares, respectively, at cost	(394,669)	(418,893)
Common stock equity	1,229,249	1,164,103
Long-term debt, net of current portion	1,340,832	1,285,980
Total capitalization	2,570,081	2,450,083
Current liabilities:
Current maturities of long-term debt	44,959	99,239
Short-term borrowings under the revolving credit facility	99,826	49,207
Accounts payable, principally trade	61,226	58,150
Taxes accrued	43,408	37,139
Interest accrued	18,848	16,478
Regulatory liabilities	19,141	14,686
Other	39,244	38,356
Total current liabilities	326,652	313,255
Deferred credits and other liabilities:
Accumulated deferred income taxes	349,620	325,133
Accrued pension liability	80,616	87,259
Accrued post-retirement benefit liability	26,165	24,575
Asset retirement obligation	107,844	101,108
Regulatory liabilities	298,555	298,570
Other	40,696	28,519
Total deferred credits and other liabilities	903,496	865,164
Commitments and contingencies
Total capitalization and liabilities	3,800,229	3,628,502
Nuclear Fuel
Utility plant:
Less accumulated depreciation and amortization	$ (81,020)	$ (72,703)