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Schedule Of Revenue By Major Customers By Reporting Segments (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 29, 2024	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023
Disaggregation of Revenue [Line Items]
Revenue		$ 1,225,005	$ 1,373,857	$ 2,396,048	$ 2,809,532
BCO Independent Contractors – Truck
Disaggregation of Revenue [Line Items]
Percentage of Consolidated Revenue		38.00%	38.00%	38.00%	37.00%
Brokerage Carriers - Truck
Disaggregation of Revenue [Line Items]
Percentage of Consolidated Revenue		52.00%	53.00%	52.00%	55.00%
Rail Intermodal
Disaggregation of Revenue [Line Items]
Percentage of Consolidated Revenue		2.00%	2.00%	2.00%	2.00%
Ocean and air cargo carriers
Disaggregation of Revenue [Line Items]
Percentage of Consolidated Revenue		6.00%	5.00%	5.00%	5.00%
BCO Independent Contractor Truck and Brokerage Carriers Truck | Van Equipment
Disaggregation of Revenue [Line Items]
Revenue		$ 618,940	$ 703,041	$ 1,247,244	$ 1,458,124
BCO Independent Contractor Truck and Brokerage Carriers Truck | Unsided/Platform Equipment
Disaggregation of Revenue [Line Items]
Revenue		380,950	394,772	723,995	772,336
BCO Independent Contractor Truck and Brokerage Carriers Truck | Less than Truckload
Disaggregation of Revenue [Line Items]
Revenue		28,090	31,115	53,707	62,673
BCO Independent Contractor Truck and Brokerage Carriers Truck | Other Truck Transportation
Disaggregation of Revenue [Line Items]
Revenue	[1]	$ 77,709	$ 118,017	$ 149,675	$ 277,520
[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.

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