Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting (Details)

v3.7.0.1
Segment Reporting (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Segment Reporting Information [Line Items]      
External revenues $ 246,982 $ 229,549  
Depreciation and amortization 10,033 9,668  
Share-based compensation expense 1,962 1,952  
Interest expense 282 553  
Operating Income (Loss) 23,189 21,405  
Total assets 635,868 689,053 $ 641,291
Capital expenditures $ 2,652 2,688  
Number of reportable segments 4    
Expedited LTL [Member]      
Segment Reporting Information [Line Items]      
External revenues $ 140,012 133,524  
Intersegment revenues 586 855  
Depreciation and amortization 5,563 5,531  
Share-based compensation expense 1,645 1,724  
Interest expense 1    
Operating Income (Loss) 18,400 17,084  
Total assets 630,959 635,283  
Capital expenditures 2,511 2,078  
Truckload Expedited [Member]      
Segment Reporting Information [Line Items]      
External revenues 40,937 38,415  
Intersegment revenues 848 205  
Depreciation and amortization 1,558 1,749  
Share-based compensation expense 95 51  
Interest expense 0    
Operating Income (Loss) 1,704 1,565  
Total assets 55,523 90,678  
Capital expenditures 6 13  
Pool Distribution [Member]      
Segment Reporting Information [Line Items]      
External revenues 37,753 33,057  
Intersegment revenues 70 135  
Depreciation and amortization 1,802 1,497  
Share-based compensation expense 88 81  
Operating Income (Loss) 1,367 114  
Total assets 50,120 47,877  
Capital expenditures 83 545  
Intermodal [Member]      
Segment Reporting Information [Line Items]      
External revenues 28,280 24,553  
Intersegment revenues 11 71  
Depreciation and amortization 1,110 891  
Share-based compensation expense 134 96  
Interest expense   36  
Operating Income (Loss) 2,580 2,372  
Total assets 131,801 120,251  
Capital expenditures 52 52  
Elimination [Member]      
Segment Reporting Information [Line Items]      
Intersegment revenues (1,515) (1,266)  
Interest expense 270 517  
Operating Income (Loss) (862) 270  
Total assets $ (232,535) $ (205,036)