Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Utility plant:
Electric plant in service	$ 4,227,687	$ 4,181,409
Less accumulated depreciation and amortization	(1,409,573)	(1,391,266)
Net plant in service	2,818,114	2,790,143
Construction work in progress	176,891	169,327
Nuclear fuel; includes fuel in process of $73,105 and $62,833, respectively	208,552	198,280
Net nuclear fuel	125,853	125,577
Net utility plant	3,120,858	3,085,047
Current assets:
Cash and cash equivalents	8,505	12,900
Restricted cash	38,445	0
Accounts receivable, principally trade, net of allowance for doubtful accounts of $1,514 and $2,070, respectively	70,259	77,855
Inventories, at cost	57,542	55,432
Regulatory assets	7,272	6,972
Prepayments and other	25,531	20,375
Total current assets	207,554	173,534
Deferred charges and other assets:
Decommissioning trust funds	298,338	276,905
Regulatory assets	74,107	74,848
Other	17,713	18,168
Total deferred charges and other assets	390,158	369,921
Total assets	3,718,570	3,628,502
Capitalization:
Common stock, stated value $1 per share, 100,000,000 shares authorized, 65,678,261 and 65,707,156 shares issued, and 150,427 and 121,532 restricted shares, respectively	65,829	65,829
Capital in excess of stated value	328,228	328,480
Retained earnings	1,218,902	1,227,471
Accumulated other comprehensive loss, net of tax	(37,127)	(38,784)
Total stockholders' equity subtotal before treasury stock	1,575,832	1,582,996
Treasury stock, 25,090,505 and 25,147,567 shares, respectively, at cost	(417,943)	(418,893)
Common stock equity	1,157,889	1,164,103
Long-term debt, net of current portion	1,286,111	1,285,980
Total capitalization	2,444,000	2,450,083
Current liabilities:
Current maturities of long-term debt	36,550	99,239
Short-term borrowings under the revolving credit facility	202,951	49,207
Accounts payable, principally trade	46,911	58,150
Taxes accrued	28,147	37,139
Interest accrued	19,449	16,478
Regulatory liabilities	26,484	14,686
Other	41,000	38,356
Total current liabilities	401,492	313,255
Deferred credits and other liabilities:
Accumulated deferred income taxes	326,849	325,133
Accrued pension liability	85,012	87,259
Accrued post-retirement benefit liability	25,134	24,575
Asset retirement obligation	103,349	101,108
Regulatory liabilities	298,615	298,570
Other	34,119	28,519
Total deferred credits and other liabilities	873,078	865,164
Commitments and contingencies
Total capitalization and liabilities	3,718,570	3,628,502
Nuclear Fuel
Utility plant:
Less accumulated depreciation and amortization	$ (82,699)	$ (72,703)