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Significant Accounting Policies - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Total revenue from operations	$ 1,498,697	$ 1,413,189	$ 2,958,770	$ 2,855,325
LTL Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue from operations	1,484,967	1,397,815	2,931,700	2,822,187
Other Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue from operations	$ 13,730	$ 15,374	$ 27,070	$ 33,138

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