Quarterly report pursuant to Section 13 or 15(d)

Business Segments and Customer Information (Details)

v3.5.0.2
Business Segments and Customer Information (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
segment
Sep. 30, 2015
USD ($)
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]        
Number of reportable operating segments | segment     4  
Segment Reporting Information [Line Items]        
Revenues $ 172,780 $ 137,396 $ 476,889 $ 389,313
Operating income 13,623 13,243 38,243 35,423
Operating Segments | Supply Chain Management Group        
Segment Reporting Information [Line Items]        
Revenues 51,152 50,315 152,080 144,429
Operating income 8,749 9,235 26,600 26,222
Operating Segments | Aviation        
Segment Reporting Information [Line Items]        
Revenues 34,688 32,976 100,298 87,644
Operating income 3,950 2,116 9,896 6,833
Operating Segments | Federal Services Group        
Segment Reporting Information [Line Items]        
Revenues 75,377 42,240 189,679 117,774
Operating income 666 1,152 2,383 529
Operating Segments | IT, Energy and Management Consulting Group        
Segment Reporting Information [Line Items]        
Revenues 11,563 11,865 34,832 39,466
Operating income 984 1,169 2,658 3,872
Corporate, Non-Segment        
Segment Reporting Information [Line Items]        
Operating income $ (726) $ (429) $ (3,294) $ (2,033)