Claims Accruals (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Liability for Claims and Claims Adjustment Expense [Line Items]
Claims accruals	$ 513,660	$ 417,321
Less: current portion of claims accruals	(311,822)	(206,607)
Claims accruals – less current portion	201,838	210,714
Auto and collision liability [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Claims accruals	266,734	263,091
Workers' compensation liability [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Claims accruals	76,154	90,481
Third party carrier claims liability
Liability for Claims and Claims Adjustment Expense [Line Items]
Claims accruals	134,116	31,524
Owner-operator claims liability [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Claims accruals	6,137	6,285
Cargo damage liability [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Claims accruals	7,231	5,409
Employee medical reserves [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Claims accruals	$ 23,288	$ 20,531