Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Goodwill (Details)

v3.7.0.1
Acquisitions and Goodwill (Details)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
May 07, 2017
USD ($)
Aug. 29, 2016
USD ($)
Jan. 25, 2016
USD ($)
Mar. 09, 2015
USD ($)
Segment Reporting Information [Line Items]                
Business Acquisition, Goodwill, Expected Tax Deductible Amount $ 112,391   $ 112,391          
Carrying value of goodwill 191,535   191,535 $ 184,675        
Goodwill, Acquired During Period     6,860          
Impairment of Intangible Assets, Finite-lived   $ 16,501            
Escrow Reimbursements Received 2,525              
Recovery of Direct Costs 1,621              
Liability for Unpaid Claims and Claims Adjustment Expense, Adjustments 904   $ 904          
Number of Reporting Units     5          
Atlantic [Member]                
Segment Reporting Information [Line Items]                
Business Acquisition, Cash Paid         $ 22,500      
Business Combination, Contingent Consideration, Liability         1,000      
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period       62,300        
Operating Revenue Since Acquisition Date 8,438              
Carrying value of goodwill         6,860      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment         1,821      
Business Combination, Recognized Identifiable Assets Acquired and Total Liabilities Assumed, Total Tangible Assets         1,821      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles         21,410      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets         23,231      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other         590      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Capital Lease Obligation         141      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities         731      
Business Combination, Recognized Identifiable Assets Acquired and Total Liabilities Assumed, Net Total Assets         22,500      
Business Combination, Pro Forma Information, Operating Income of Acquiree since Acquisition Date, Actual 339              
Towne [Member]                
Segment Reporting Information [Line Items]                
Escrow Deposit               $ 16,500
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   $ 97,593 97,593        
Truckload Expedited [Member]                
Segment Reporting Information [Line Items]                
Carrying value of goodwill 45,164   45,164 45,164        
Goodwill, Impaired, Accumulated Impairment Loss (25,686)   (25,686) (25,686)        
Other Asset Impairment Charges   $ 255            
Pool Distribution [Member]                
Segment Reporting Information [Line Items]                
Carrying value of goodwill 12,359   12,359 12,359        
Goodwill, Impaired, Accumulated Impairment Loss (6,953)   (6,953) (6,953)        
Intermodal [Member]                
Segment Reporting Information [Line Items]                
Carrying value of goodwill $ 69,058   69,058 $ 62,198        
Goodwill, Acquired During Period     $ 6,860          
Ace [Member]                
Segment Reporting Information [Line Items]                
Business Acquisition, Cash Paid             $ 1,700  
Noncompete Agreements [Member] | Atlantic [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         1,150      
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] | Atlantic [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         $ 13,400      
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