Quarterly report pursuant to Section 13 or 15(d)

Business Segments and Customer Information (Details)

v3.7.0.1
Business Segments and Customer Information (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
segment
Jun. 30, 2016
USD ($)
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]        
Number of reportable operating segments | segment     3  
Segment Reporting Information [Line Items]        
Revenues $ 193,860 $ 160,473 $ 391,154 $ 304,109
Operating income 15,005 11,879 29,201 24,620
Operating Segments | Supply Chain Management Group        
Segment Reporting Information [Line Items]        
Revenues 56,404 49,785 112,489 100,928
Operating income 8,950 8,823 17,433 17,851
Operating Segments | Aviation        
Segment Reporting Information [Line Items]        
Revenues 32,590 32,064 64,944 65,610
Operating income 2,579 2,657 4,915 5,946
Operating Segments | Federal Services Group        
Segment Reporting Information [Line Items]        
Revenues 104,866 78,624 213,721 137,571
Operating income 3,992 1,832 7,910 3,391
Corporate, Non-Segment        
Segment Reporting Information [Line Items]        
Operating income $ (516) $ (1,433) $ (1,057) $ (2,568)