Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Long-Lived Assets - Goodwill and Other Long-Lived Assets (Details)

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Acquisitions and Long-Lived Assets - Goodwill and Other Long-Lived Assets (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Jan. 12, 2020
USD ($)
Dec. 31, 2019
USD ($)
Number of Reporting Units 5    
Business Acquisition, Goodwill, Expected Tax Deductible Amount $ 163,496    
Goodwill, Gross 275,278   $ 253,744
Goodwill, Impaired, Accumulated Impairment Loss (32,639)   (32,639)
Goodwill 242,639   221,105
Expedited Freight [Member]      
Goodwill, Gross 97,593   97,593
Truckload [Member]      
Goodwill, Gross 45,164   45,164
Goodwill, Impaired, Accumulated Impairment Loss (25,686)   (25,686)
Final Mile [Member]      
Goodwill, Gross 41,497   19,963
Linn Star [Member]      
Goodwill 21,534 $ 21,534  
Intermodal [Member]      
Goodwill, Gross 78,665   78,665
Pool Distribution [Member]      
Goodwill, Gross 12,359   12,359
Goodwill, Impaired, Accumulated Impairment Loss $ (6,953)   $ (6,953)