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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
ASSETS |  |
Cash and cash equivalents | $ 61,844 | $ 85,109
Inventories | 75,755 | 77,000
Assets held for sale | 7,270 | 6,466
Federal income tax receivable | 845 | 845
Prepaid insurance | 11,248 | 1,790
Other current assets | 19,558 | 15,499
Total current assets | 212,839 | 231,998
Property, plant and equipment, net | 238,906 | 223,902
Intangibles, net | 5,880 | 6,006
Deferred income taxes | 15,113 | 15,081
Investments in unconsolidated subsidiaries | 13,753 | 12,371
Operating lease right-of-use assets | 7,876 | 8,667
Other non-current assets | 43,631 | 41,683
Total assets | 537,998 | 539,708
LIABILITIES AND EQUITY |  |
Revolving credit agreements | 17,000 | 10,000
Current maturities of long-term debt | 4,498 | 3,953
Asset retirement obligations | 13,105 | 13,114
Accrued payroll | 9,069 | 17,317
Deferred revenue | 930 | 878
Other current liabilities | 6,265 | 7,118
Total current liabilities | 63,935 | 69,986
Long-term debt | 28,377 | 22,003
Operating lease liabilities | 7,962 | 8,782
Asset retirement obligations | 38,550 | 39,499
Pension and other postretirement obligations | 5,059 | 5,183
Liability for uncertain tax positions | 5,795 | 5,795
Other long-term liabilities | 6,707 | 6,120
Total liabilities | 156,385 | 157,368
Common stock: |  |
Capital in excess of par value | 29,073 | 28,672
Retained earnings | 354,667 | 355,873
Accumulated other comprehensive loss | (9,578) | (9,654)
Total stockholders' equity | 381,613 | 382,340
Total liabilities and equity | 537,998 | 539,708
Nonrelated Party |  |
ASSETS |  |
Trade accounts receivable and accounts receivable from affiliates | 27,958 | 37,429
LIABILITIES AND EQUITY |  |
Accounts payable and accounts payable to affiliates | 12,377 | 16,702
Affiliated Entity |  |
ASSETS |  |
Trade accounts receivable and accounts receivable from affiliates | 8,361 | 7,860
LIABILITIES AND EQUITY |  |
Accounts payable and accounts payable to affiliates | 691 | 904
Class A Common Stock |  |
Common stock: |  |
Common stock | 5,885 | 5,883
Class B Common Stock |  |
Common stock: |  |
Common stock | $ 1,566 | $ 1,566

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