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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
ASSETS    
Cash and cash equivalents $ 128,167 $ 110,748
Inventories 69,216 71,488
Assets held for sale 3,936 285
Federal income tax receivable 5,864 15,687
Prepaid insurance 3,907 1,999
Other current assets 12,314 15,622
Total current assets 258,147 260,407
Property, plant and equipment, net 236,836 217,952
Intangibles, net 25,759 28,055
Investments in unconsolidated subsidiaries 11,461 14,927
Operating lease right-of-use assets 7,422 6,419
Other non-current assets 41,278 40,312
Total assets 580,903 568,072
LIABILITIES AND EQUITY    
Current maturities of long-term debt 3,579 3,649
Asset retirement obligations 8,102 1,746
Accrued payroll 13,451 18,105
Deferred revenue 1,299 833
Other current liabilities 8,582 6,623
Total current liabilities 60,870 44,270
Long-term debt 18,955 16,019
Operating lease liabilities 8,201 7,528
Asset retirement obligations 41,556 44,256
Pension and other postretirement obligations 4,049 5,082
Deferred income taxes 4,206 6,122
Liability for uncertain tax positions 8,552 9,329
Other long-term liabilities 6,069 8,500
Total liabilities 152,458 141,106
Common stock:    
Capital in excess of par value 25,415 23,706
Retained earnings 404,478 404,924
Accumulated other comprehensive loss (8,954) (9,013)
Total stockholders' equity 428,445 426,966
Total liabilities and equity 580,903 568,072
Nonrelated Party    
ASSETS    
Trade accounts receivable and accounts receivable from affiliates 29,738 37,940
LIABILITIES AND EQUITY    
Accounts payable and accounts payable to affiliates 24,589 11,952
Affiliated Entity    
ASSETS    
Trade accounts receivable and accounts receivable from affiliates 5,005 6,638
LIABILITIES AND EQUITY    
Accounts payable and accounts payable to affiliates 1,268 1,362
Class A Common Stock    
Common stock:    
Common stock 5,940 5,783
Class B Common Stock    
Common stock:    
Common stock $ 1,566 $ 1,566