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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Current assets |  |
Cash and cash equivalents | $ 85,109 | $ 110,748
Inventories | 77,000 | 71,488
Assets held for sale | 6,466 | 285
Federal income tax receivable | 845 | 15,687
Prepaid insurance | 1,790 | 1,999
Other current assets | 15,499 | 15,622
Total current assets | 231,998 | 260,407
Property, plant and equipment, net | 223,902 | 217,952
Intangibles, net | 6,006 | 28,055
Deferred income taxes | 15,081 | 0
Investments in unconsolidated subsidiaries | 12,371 | 14,927
Operating lease right-of-use assets | 8,667 | 6,419
Other non-current assets | 41,683 | 40,312
Total assets | 539,708 | 568,072
Current liabilities |  |
Revolving credit agreements | 10,000 | 0
Current maturities of long-term debt | 3,953 | 3,649
Asset retirement obligations | 13,114 | 1,746
Accrued payroll | 17,317 | 18,105
Deferred revenue | 878 | 833
Other current liabilities | 7,118 | 6,623
Total current liabilities | 69,986 | 44,270
Long-term debt | 22,003 | 16,019
Operating lease liabilities | 8,782 | 7,528
Asset retirement obligations | 39,499 | 44,256
Pension and other postretirement obligations | 5,183 | 5,082
Deferred income taxes | 0 | 6,122
Liability for uncertain tax positions | 5,795 | 9,329
Other long-term liabilities | 6,120 | 8,500
Total liabilities | 157,368 | 141,106
Common stock: |  |
Capital in excess of par value | 28,672 | 23,706
Retained earnings | 355,873 | 404,924
Accumulated other comprehensive loss | (9,654) | (9,013)
Total stockholders’ equity | 382,340 | 426,966
Total liabilities and equity | 539,708 | 568,072
Nonrelated Party |  |
Current assets |  |
Trade accounts receivable and accounts receivable from affiliates | 37,429 | 37,940
Current liabilities |  |
Accounts payable and accounts payable to affiliates | 16,702 | 11,952
Affiliated Entity |  |
Current assets |  |
Trade accounts receivable and accounts receivable from affiliates | 7,860 | 6,638
Current liabilities |  |
Accounts payable and accounts payable to affiliates | 904 | 1,362
Class A Common Stock |  |
Common stock: |  |
Common stock | 5,883 | 5,783
Class B Common Stock |  |
Common stock: |  |
Common stock | $ 1,566 | $ 1,566

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