v3.25.2
Nature of Operations and Basis of Presentation (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
segment
Jun. 30, 2024
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Long-term Purchase Commitment [Line Items]            
Number of operating segments | segment     3      
Long-term contracts percentage 100.00%   100.00%      
Prepaid profit sharing $ 12,041   $ 12,041     $ 0
Gain (loss) from liability settlement 3,590 $ 0 3,590 $ 0    
Excess funding liability 5,450   5,450     0
Assets held for sale 17,022   17,022     14,159
Pension Plan            
Long-term Purchase Commitment [Line Items]            
Prepaid profit sharing 12,000   12,000   $ 14,500  
Payments for liability settlement 10,900          
Gain (loss) from liability settlement 3,600          
Liability settlement, amount awarded to other party 5,500          
Excess funding liability 5,400   5,400      
Minerals and Royalties            
Long-term Purchase Commitment [Line Items]            
Proceeds from sale, land, held-for-use   7,000        
Gain (loss) on sale of properties   4,500        
Eiger, LLC            
Long-term Purchase Commitment [Line Items]            
Investments in unconsolidated subsidiaries 18,954   18,954     19,147
Eiger, LLC | Minerals and Royalties            
Long-term Purchase Commitment [Line Items]            
Investments in unconsolidated subsidiaries 19,000   19,000     $ 19,100
Income from equity method investments $ 300 $ 100 $ 800 $ 100