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Significant Accounting Policies - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue from operations	$ 1,442,136	$ 1,497,280
LTL Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from operations	1,424,372	1,475,781
Other Service Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from operations	$ 17,764	$ 21,499

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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.

+ References

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