Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss	$ 2,300		$ 2,300		$ 1,600
Operating Revenue	210,387	$ 274,754	429,807	$ 545,074
Accessorial and other revenues	14,700	20,000	30,600	40,100
fuel surcharge [Member]
Disaggregation of Revenue [Line Items]
Fuel surcharge revenue	$ 24,500	$ 36,800	$ 50,800	$ 73,000