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Significant Accounting Policies - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Total revenue from operations	$ 1,374,858	$ 1,460,073
LTL Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue from operations	1,360,839	1,446,733
Other Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue from operations	$ 14,019	$ 13,340

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