Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments	2
Revenues
Total Operating Revenue	$ 517,188	$ 450,760
Operating Income (Loss)
Total Operating Income	(210)	7,998
Truckload Segment [Member]
Revenues
Total Operating Revenue	423,260	368,920
Operating Income (Loss)
Total Operating Income	273	6,728
Brokerage Segment [Member]
Revenues
Total Operating Revenue	93,928	81,840
Operating Income (Loss)
Total Operating Income	$ (483)	$ 1,270