Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Disaggregated Revenue (Details)

v3.19.3
Significant Accounting Policies - Disaggregated Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Disaggregation Of Revenue [Line Items]        
Revenue from operations $ 1,048,457 $ 1,058,233 $ 3,099,905 $ 3,016,751
LTL Service Revenue [Member]        
Disaggregation Of Revenue [Line Items]        
Revenue from operations 1,035,093 1,041,854 3,058,864 2,971,399
Other Service Revenue [Member]        
Disaggregation Of Revenue [Line Items]        
Revenue from operations $ 13,364 $ 16,379 $ 41,041 $ 45,352