Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments			2
Operating revenue
Total Operating Revenue	$ 547,828	$ 491,140	$ 1,618,719	$ 1,416,921
Operating Income (Loss)
Total Operating Income	(22,740)	6,635	(16,482)	23,539
Truckload Segment
Operating revenue
Total Operating Revenue	472,341	400,320	1,360,778	1,147,773
Operating Income (Loss)
Total Operating Income	(26,604)	8,081	(25,421)	23,553
Brokerage Segment
Operating revenue
Total Operating Revenue	75,487	90,820	257,941	269,148
Operating Income (Loss)
Total Operating Income	$ 3,864	$ (1,446)	$ 8,939	$ (14)