Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Disaggregated Revenue (Details)

v3.21.1
Significant Accounting Policies - Disaggregated Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disaggregation of Revenue [Line Items]    
Revenue from operations $ 1,126,515 $ 987,364
LTL Service Revenue [Member]    
Disaggregation of Revenue [Line Items]    
Revenue from operations 1,109,621 974,431
Other Service Revenue [Member]    
Disaggregation of Revenue [Line Items]    
Revenue from operations $ 16,894 $ 12,933