Significant Accounting Policies - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total revenue from operations	$ 1,334,696	$ 1,374,858
LTL Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue from operations	1,321,891	1,360,839
Other Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue from operations	$ 12,805	$ 14,019

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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