Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Details)

v3.5.0.2
Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Goodwill [Line Items]          
Goodwill, Period Increase (Decrease)     $ 77    
Goodwill [Roll Forward]          
Balance as of beginning of period     198,545    
Balance as of end of period $ 198,622   198,622    
Finite-Lived Intangible Assets [Line Items]          
Amortization of intangible assets 4,022 $ 4,027 12,063 $ 11,769  
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 202,164   202,164   $ 202,214
Accumulated Amortization (70,209)   (70,209)   (58,146)
Accumulated Impairment Loss (1,025)   (1,025)   (1,025)
Net Intangible Assets 130,930   130,930   143,043
Supply Chain Management          
Goodwill [Line Items]          
Goodwill, Period Increase (Decrease)     77    
Goodwill [Roll Forward]          
Balance as of beginning of period     63,113    
Balance as of end of period 63,190   63,190    
IT, Energy and Management Consulting          
Goodwill [Line Items]          
Goodwill, Period Increase (Decrease)     0    
Goodwill [Roll Forward]          
Balance as of beginning of period     30,883    
Balance as of end of period 30,883   30,883    
Aviation          
Goodwill [Line Items]          
Goodwill, Period Increase (Decrease)     0    
Goodwill [Roll Forward]          
Balance as of beginning of period     104,549    
Balance as of end of period 104,549   104,549    
Contract and customer-related          
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 173,094   173,094   173,084
Accumulated Amortization (56,515)   (56,515)   (46,611)
Accumulated Impairment Loss (1,025)   (1,025)   (1,025)
Net Intangible Assets 115,554   115,554   125,448
Acquired technologies          
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 12,400   12,400   12,400
Accumulated Amortization (5,996)   (5,996)   (5,151)
Accumulated Impairment Loss 0   0   0
Net Intangible Assets 6,404   6,404   7,249
Trade names – amortizable          
Finite-Lived Intangible Assets, Net [Abstract]          
Cost 16,670   16,670   16,730
Accumulated Amortization (7,698)   (7,698)   (6,384)
Accumulated Impairment Loss 0   0   0
Net Intangible Assets $ 8,972   $ 8,972   $ 10,346