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Pension Plans (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2012
Dec. 31, 2023
Pension Plans            
Received special financial assistance funds       $ 3,400,000    
Granted special financial assistance funds       3,400,000    
Multi-employer defined benefit pension plan | Consenting agreement entered with local bargaining union            
Pension Plans            
Insolvent period 20 years          
Estimated liability upon withdrawal from plan     $ 102,800 97,500   $ 102,200
Percentage of annual compounded surcharge for rehabilitation 5.00%          
Percentage of interim surcharge         5.00%  
Pension expense $ 1,777 $ 1,744 3,290 3,332    
Surcharges $ 626 $ 615 $ 1,160 $ 1,174