Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Contract with Customer, Asset, Net [Abstract]
Contract with Customer, Asset, Net	$ 1,900	$ 1,600
Operating Revenues	805,700	1,047,500	$ 1,207,500
Fuel surcharge revenue	96,600	133,900	173,800
Accessorial, brokerage and other revenues	58,100	78,000	$ 94,800
Deposit Contracts, Liabilities	0	$ 0
Foreign Revenue - Mexico	31,300
Foreign Assets - Mexico	$ 1,100