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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 20,230 $ 98,500
Restricted cash   2,532
Short-term investments 163,971 207,434
Accounts receivable 39,083 40,749
Allowance for doubtful accounts (323) (364)
Accounts receivable, net 38,760 40,385
Inventories:    
Finished goods 22,382 26,329
Raw materials 2,519 1,799
Total inventories 24,901 28,128
Supplies, prepaid items and other:    
Prepaid insurance 14,345 14,846
Precious metals 11,596 12,094
Supplies 31,995 30,486
Other 3,916 2,337
Total supplies, prepaid items and other 61,852 59,763
Total current assets 309,714 436,742
Property, plant and equipment, net 847,570 835,298
Other assets:    
Operating lease assets 28,727 24,852
Intangible and other assets, net 1,177 1,292
Total other assets 29,904 26,144
Total assets 1,187,188 1,298,184
Current liabilities:    
Accounts payable 83,498 68,323
Short-term financing 12,146 13,398
Accrued and other liabilities 30,874 30,961
Current portion of long-term debt 9,116 5,847
Total current liabilities 135,634 118,529
Long-term debt, net 476,163 575,874
Noncurrent operating lease liabilities 21,387 16,074
Other noncurrent accrued liabilities 456 523
Deferred income taxes 61,908 68,853
Commitments and contingencies (Note 7)
Stockholders' equity:    
Common stock, $.10 par value per share; 150 million shares authorized, 91.2 million shares issued 9,117 9,117
Capital in excess of par value 504,578 501,026
Retained earnings 207,662 227,015
Total stockholders' equity 721,357 737,158
Less treasury stock, at cost:    
Common stock, 19.5 million shares (18.1 million shares at December 31, 2023) 229,717 218,827
Total stockholders' equity 491,640 518,331
Total liabilities and stockholders' equity $ 1,187,188 $ 1,298,184