Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Goodwill (Details)

v3.7.0.1
Acquisitions and Goodwill (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Aug. 29, 2016
Jan. 25, 2016
Segment Reporting Information [Line Items]        
Business Acquisition, Goodwill, Expected Tax Deductible Amount $ 105,531      
Carrying value of goodwill 184,675 $ 184,675    
Impairment of Intangible Assets, Finite-lived   $ 16,501    
Triumph & Ace [Member]        
Segment Reporting Information [Line Items]        
Carrying value of goodwill     $ 6,282  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment     1,294  
Business Combination, Recognized Identifiable Assets Acquired and Total Liabilities Assumed, Total Tangible Assets     1,294  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles     11,756  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets     13,050  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other     1,250  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities     1,250  
Business Combination, Recognized Identifiable Assets Acquired and Total Liabilities Assumed, Net Total Assets     11,800  
Triumph [Member]        
Segment Reporting Information [Line Items]        
Business Acquisition, Cash Paid     10,100  
Business Combination, Contingent Consideration, Liability     1,250  
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 $ 62,198      
Ace [Member]        
Segment Reporting Information [Line Items]        
Business Acquisition, Cash Paid       $ 1,700
Noncompete Agreements [Member] | Triumph & Ace [Member]        
Segment Reporting Information [Line Items]        
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 5 years      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill     139  
Customer Relationships [Member] | Triumph & Ace [Member]        
Segment Reporting Information [Line Items]        
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 15 years      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill     $ 5,335