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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
ASSETS    
Cash and cash equivalents $ 117,016 $ 110,748
Inventories 65,210 71,488
Federal income tax receivable 4,272 15,687
Prepaid insurance 7,150 1,999
Other current assets 12,826 15,907
Total current assets 262,111 260,407
Property, plant and equipment, net 224,302 217,952
Intangibles, net 26,401 28,055
Investments in unconsolidated subsidiaries 11,064 14,927
Operating lease right-of-use assets 6,121 6,419
Other non-current assets 41,511 40,312
Total assets 571,510 568,072
LIABILITIES AND EQUITY    
Current maturities of long-term debt 3,675 3,649
Asset retirement obligations 2,497 1,746
Accrued payroll 9,849 18,105
Deferred revenue 1,122 833
Other current liabilities 7,312 6,623
Total current liabilities 37,511 44,270
Long-term debt 20,054 16,019
Operating lease liabilities 7,048 7,528
Asset retirement obligations 46,890 44,256
Pension and other postretirement obligations 4,307 5,082
Deferred income taxes 4,746 6,122
Liability for uncertain tax positions 9,004 9,329
Other long-term liabilities 8,552 8,500
Total liabilities 138,112 141,106
Common stock:    
Capital in excess of par value 24,906 23,706
Retained earnings 409,946 404,924
Accumulated other comprehensive loss (8,974) (9,013)
Total stockholders' equity 433,398 426,966
Total liabilities and equity 571,510 568,072
Nonrelated Party    
ASSETS    
Trade accounts receivable and sccounts receivable from affiliates 46,047 37,940
LIABILITIES AND EQUITY    
Accounts payable and accounts payable to affiliates 12,898 11,952
Affiliated Entity    
ASSETS    
Trade accounts receivable and sccounts receivable from affiliates 9,590 6,638
LIABILITIES AND EQUITY    
Accounts payable and accounts payable to affiliates 158 1,362
Class A Common Stock    
Common stock:    
Common stock 5,954 5,783
Class B Common Stock    
Common stock:    
Common stock $ 1,566 $ 1,566