Quarterly report pursuant to Section 13 or 15(d)

Business Segments and Customer Information - Segment Information (Details)

v3.19.1
Business Segments and Customer Information - Segment Information (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
segment
Mar. 31, 2018
USD ($)
Segment Reporting [Abstract]    
Number of reportable operating segments | segment 3  
Segment Reporting Information [Line Items]    
Revenues $ 169,919 $ 176,897
Operating income 11,813 11,593
Supply Chain Management Group    
Segment Reporting Information [Line Items]    
Revenues 51,704 55,864
Aviation Group    
Segment Reporting Information [Line Items]    
Revenues 49,370 32,750
Federal Services    
Segment Reporting Information [Line Items]    
Revenues 68,845 88,283
Operating Segments | Supply Chain Management Group    
Segment Reporting Information [Line Items]    
Revenues 51,704 55,864
Operating income 6,988 7,596
Operating Segments | Aviation Group    
Segment Reporting Information [Line Items]    
Revenues 49,370 32,750
Operating income 3,048 2,261
Operating Segments | Federal Services    
Segment Reporting Information [Line Items]    
Revenues 68,845 88,283
Operating income 3,385 2,478
Corporate, Non-Segment    
Segment Reporting Information [Line Items]    
Operating income $ (1,608) $ (742)