Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss	$ 2,400		$ 2,400		$ 2,600
Operating Revenue	295,026	$ 273,976	932,111	$ 613,073
Accessorial and other revenues	22,400	15,700	71,700	23,300
fuel surcharge [Member]
Disaggregation of Revenue [Line Items]
Fuel surcharge revenue	$ 42,900	$ 47,500	$ 134,100	$ 107,800