Schedule Of Revenue By Major Customers By Reporting Segments (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Disaggregation of Revenue [Line Items]
Revenue		$ 7,436,562	$ 6,537,568	$ 4,132,981
BCO Independent Contractors – Truck
Disaggregation of Revenue [Line Items]
Percentage of Consolidated Revenue		35.00%	40.00%	45.00%
Brokerage Carriers - Truck
Disaggregation of Revenue [Line Items]
Percentage of Consolidated Revenue		54.00%	51.00%	47.00%
Rail Intermodal
Disaggregation of Revenue [Line Items]
Percentage of Consolidated Revenue		2.00%	2.00%	3.00%
Ocean and air cargo carriers
Disaggregation of Revenue [Line Items]
Percentage of Consolidated Revenue		8.00%	5.00%	3.00%
BCO Independent Contractor Truck and Brokerage Carriers Truck | Van Equipment
Disaggregation of Revenue [Line Items]
Revenue		$ 3,892,085	$ 3,525,830	$ 2,192,254
BCO Independent Contractor Truck and Brokerage Carriers Truck | Unsided/Platform Equipment
Disaggregation of Revenue [Line Items]
Revenue		1,760,357	1,549,037	1,119,272
BCO Independent Contractor Truck and Brokerage Carriers Truck | Less than Truckload
Disaggregation of Revenue [Line Items]
Revenue		142,438	117,505	97,546
BCO Independent Contractor Truck and Brokerage Carriers Truck | Other Truck Transportation
Disaggregation of Revenue [Line Items]
Revenue	[1]	$ 835,959	$ 770,846	$ 406,709

[1] Includes power-only, expedited, straight truck, cargo van, and miscellaneous other truck transportation revenue generated by the transportation logistics segment. Power-only refers to shipments where the Company furnishes a power unit and an operator but not trailing equipment, which is typically provided by the shipper or consignee.