v3.26.1
Revenue Recognition (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
Disaggregation of Revenue [Line Items]          
Contract with Customer, Asset, after Allowance for Credit Loss $ 1,600   $ 1,600   $ 1,900
Operating Revenue 184,126 $ 210,387 360,383 $ 429,807  
Accessorial and other revenues 15,000 14,700 30,700 30,600  
fuel surcharge [Member]          
Disaggregation of Revenue [Line Items]          
Fuel surcharge revenue $ 31,700 $ 24,500 $ 54,200 $ 50,800