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Significant Accounting Policies - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenue from operations	$ 1,460,073	$ 1,442,136
LTL Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue from operations	1,446,733	1,424,372
Other Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue from operations	$ 13,340	$ 17,764

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