Annual report pursuant to Section 13 and 15(d)

Business Segments and Customer Information (Details)

v3.6.0.2
Business Segments and Customer Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]                      
Revenues                 $ 691,790 $ 533,982 $ 424,071
Operating income $ 13,286 $ 13,623 $ 11,879 $ 12,741 $ 15,116 $ 13,243 $ 11,496 $ 10,684 51,529 50,539 36,930
Total assets 661,839       617,354       661,839 617,354  
Operating Segments                      
Segment Reporting Information [Line Items]                      
Revenues                 691,790 533,982 424,071
Operating income                 51,529 50,539 36,930
Depreciation and amortization                 26,046 25,541 18,770
Capital expenditures                 7,372 10,562 3,414
Total assets 661,839       617,354       661,839 617,354  
Operating Segments | Supply Chain Management                      
Segment Reporting Information [Line Items]                      
Revenues                 205,475 196,772 172,482
Operating income                 34,632 35,453 29,694
Depreciation and amortization                 6,445 7,074 5,373
Capital expenditures                 4,195 7,544 2,524
Total assets 185,004       188,352       185,004 188,352  
Operating Segments | Aviation                      
Segment Reporting Information [Line Items]                      
Revenues                 133,466 119,729 0
Operating income                 12,823 10,635 0
Depreciation and amortization                 5,461 5,865 0
Capital expenditures                 1,459 959 0
Total assets 291,500       263,226       291,500 263,226  
Operating Segments | Federal Services Group                      
Segment Reporting Information [Line Items]                      
Revenues                 306,109 166,973 190,761
Operating income                 4,185 2,071 3,452
Depreciation and amortization                 12,752 10,635 11,320
Capital expenditures                 85 78 230
Total assets 60,506       38,772       60,506 38,772  
Operating Segments | IT, Energy and Management Consulting                      
Segment Reporting Information [Line Items]                      
Revenues                 46,740 50,508 60,828
Operating income                 3,611 4,731 6,634
Depreciation and amortization                 1,388 1,967 2,077
Capital expenditures                 9 16 199
Total assets 47,043       47,000       47,043 47,000  
Operating Segments | Corporate                      
Segment Reporting Information [Line Items]                      
Total assets $ 77,786       $ 80,004       77,786 80,004  
Corporate                      
Segment Reporting Information [Line Items]                      
Operating income                 (3,722) (2,351) (2,850)
Capital expenditures                 $ 1,624 $ 1,965 $ 461