Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Utility plant:
Electric plant in service	$ 4,289,327	$ 4,181,409
Less accumulated depreciation and amortization	(1,431,163)	(1,391,266)
Net plant in service	2,858,164	2,790,143
Construction work in progress	174,148	169,327
Nuclear fuel; includes fuel in process of $58,376 and $62,833, respectively	196,722	198,280
Net nuclear fuel	124,844	125,577
Net utility plant	3,157,156	3,085,047
Current assets:
Cash and cash equivalents	12,880	12,900
Accounts receivable, principally trade, net of allowance for doubtful accounts of $1,471 and $2,070, respectively	95,842	77,855
Inventories, at cost	58,836	55,432
Regulatory assets	6,529	6,972
Prepayments and other	35,823	20,375
Total current assets	209,910	173,534
Deferred charges and other assets:
Decommissioning trust funds	308,064	276,905
Regulatory assets	73,673	74,848
Other	17,443	18,168
Total deferred charges and other assets	399,180	369,921
Total assets	3,766,246	3,628,502
Capitalization:
Common stock, stated value $1 per share, 100,000,000 shares authorized, 64,281,761 and 65,707,156 shares issued, and 146,927 and 121,532 restricted shares, respectively	64,429	65,829
Capital in excess of stated value	321,506	328,480
Retained earnings	1,212,962	1,227,471
Accumulated other comprehensive loss, net of tax	(35,693)	(38,784)
Total stockholders' equity subtotal before treasury stock	1,563,204	1,582,996
Treasury stock, 23,665,296 and 25,147,567 shares, respectively, at cost	(394,199)	(418,893)
Common stock equity	1,169,005	1,164,103
Long-term debt, net of current portion	1,385,917	1,285,980
Total capitalization	2,554,922	2,450,083
Current liabilities:
Current maturities of long-term debt	0	99,239
Short-term borrowings under the revolving credit facility	160,773	49,207
Accounts payable, principally trade	56,773	58,150
Taxes accrued	30,713	37,139
Interest accrued	13,427	16,478
Regulatory liabilities	24,454	14,686
Other	42,122	38,356
Total current liabilities	328,262	313,255
Deferred credits and other liabilities:
Accumulated deferred income taxes	333,305	325,133
Accrued pension liability	82,813	87,259
Accrued post-retirement benefit liability	25,630	24,575
Asset retirement obligation	105,585	101,108
Regulatory liabilities	298,507	298,570
Other	37,222	28,519
Total deferred credits and other liabilities	883,062	865,164
Commitments and contingencies
Total capitalization and liabilities	3,766,246	3,628,502
Nuclear Fuel
Utility plant:
Less accumulated depreciation and amortization	$ (71,878)	$ (72,703)