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Income Taxes - Tax Attributes and Valuation Allowances (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Operating Loss Carryforwards      
Balance at beginning of period, Valuation allowance $ (1,462) $ (1,177) $ (607)
Additions to valuation allowance (141) (455) (742)
Reductions to valuation allowance 162 170 172
Balance at end of period, Valuation allowance (1,441) (1,462) $ (1,177)
Deferred tax assets net 216,492 245,822  
ECOTEC      
Operating Loss Carryforwards      
Balance at end of period, Valuation allowance (900)    
United States      
Operating Loss Carryforwards      
Operating loss carryforwards 648,600    
Tax credit carryforward 1,700    
Interest expense limitation carryforwards 113,700    
State      
Operating Loss Carryforwards      
Operating loss carryforwards 271,700    
Operating loss carryforwards not subject to expiration 174,300    
NOL valuation allowance 600 $ 500  
Interest expense limitation carryforwards $ 36,500