v3.26.1
Fair Value Disclosure (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Equity securities $ 19,121   $ 19,121   $ 17,696  
Gain (loss) on equity securities 858 $ 349 1,313 $ (521)    
Gain from liability settlement 0 3,590 0 3,590    
Excess funding liability 0   0   5,450  
Asset impairment charges 11,984 0 11,984 0    
Pension Plan            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Payments for liability settlement   10,900        
Gain from liability settlement   3,600        
Excess funding liability         5,400  
Quoted Prices in Active Markets for Identical Assets (Level 1)            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Gain (loss) on equity securities (400) (400) 500 (1,000)    
Quoted Prices in Active Markets for Identical Assets (Level 1) | Bellaire            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Gain (loss) on equity securities 1,200 $ 800 800 $ 500    
Quoted Prices in Active Markets for Identical Assets (Level 1) | Reported Value Measurement            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Equity securities cost           $ 2,000
Equity securities 4,800   4,800   4,200  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Reported Value Measurement | Bellaire            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Equity securities cost           $ 5,000
Equity securities 14,300   14,300   $ 13,500  
Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Asset impairment charges 12,000          
Significant Unobservable Inputs (Level 3) | Fair Value, Nonrecurring | Solar Infrastructure            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Capitalized assets $ 4,200   $ 4,200