Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Contract with Customer, Asset, Net [Abstract]
Contract with Customer, Asset, Net	$ 2,600	$ 1,300
Operating Revenues	968,000	607,300	$ 645,300
Fuel surcharge revenue	169,200	76,100	61,700
Accessorial, brokerage and other revenues	50,700	11,400	$ 14,300
Deposit Contracts, Liabilities	$ 0	$ 0