Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Long-Lived Assets - Expedited Freight Acquisitions (Details)

v3.20.2
Acquisitions and Long-Lived Assets - Expedited Freight Acquisitions (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Apr. 21, 2019
USD ($)
Sep. 30, 2020
USD ($)
Jun. 30, 2020
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Jan. 12, 2020
USD ($)
Dec. 31, 2019
Segment Reporting Information [Line Items]              
Payments on earn-out liability       $ 5,284 $ 0    
Change in fair value of earn-out liability       (2,209) $ 890    
Linn Star [Member]              
Segment Reporting Information [Line Items]              
Business Acquisition, Cash Paid           $ 57,239  
Number of additional locations           20  
FSA [Member]              
Segment Reporting Information [Line Items]              
Business Acquisition, Cash Paid $ 27,000            
Business Combination, Contingent Consideration, Liability $ 15,000 $ 4,277   $ 4,277      
Period of years which earnout is calculated 2 years            
Business Combination, Contingent Consideration, Liability, Current $ 11,803            
Payments on earn-out liability     $ 5,284        
Change in fair value of earn-out liability   $ 493          
Risk Free Interest Rate [Member] | FSA [Member]              
Segment Reporting Information [Line Items]              
Business Combination, Contingent Consideration, Liability, Measurement Input Percentage 2.90% 2.00%   2.00%     2.20%
Revenue Discount Rate [Member] | FSA [Member]              
Segment Reporting Information [Line Items]              
Business Combination, Contingent Consideration, Liability, Measurement Input Percentage 4.40% 3.20%   3.20%     4.40%
Revenue Volatility [Member] | FSA [Member]              
Segment Reporting Information [Line Items]              
Business Combination, Contingent Consideration, Liability, Measurement Input Percentage 3.00% 7.00%   7.00%     5.00%