Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Goodwill (Details)

v3.19.1
Acquisitions and Goodwill (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Oct. 28, 2018
Jul. 25, 2018
Segment Reporting Information [Line Items]        
Business Acquisition, Goodwill, Expected Tax Deductible Amount $ 119,948      
Carrying value of goodwill 199,092 $ 199,092    
MMT [Member]        
Segment Reporting Information [Line Items]        
Business Acquisition, Cash Paid       $ 3,737
Southwest Freight Distributors [Member]        
Segment Reporting Information [Line Items]        
Business Acquisition, Cash Paid     $ 16,250  
Expedited LTL [Member]        
Segment Reporting Information [Line Items]        
Carrying value of goodwill 97,593      
Truckload Expedited [Member]        
Segment Reporting Information [Line Items]        
Carrying value of goodwill 45,164      
Goodwill, Impaired, Accumulated Impairment Loss (25,686)      
Pool Distribution [Member]        
Segment Reporting Information [Line Items]        
Carrying value of goodwill 12,359      
Goodwill, Impaired, Accumulated Impairment Loss (6,953)      
Intermodal [Member]        
Segment Reporting Information [Line Items]        
Carrying value of goodwill $ 76,615