Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss	$ 2,100		$ 2,100		$ 1,300
Operating Revenue	273,976	$ 152,612	613,073	$ 459,142
Accessorial and other revenues	8,400	2,700	15,900	8,600
fuel surcharge [Member]
Disaggregation of Revenue [Line Items]
Fuel surcharge revenue	$ 47,500	$ 19,600	$ 107,800	$ 55,500