Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Details)

v3.4.0.3
Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Goodwill [Roll Forward]      
Balance as of beginning of period $ 198,545    
Balance as of end of period 198,545    
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 4,000 $ 3,600  
Contract and customer-related 173,084   $ 173,084
Acquired technologies 12,400   12,400
Trade names - amortizable 16,730   16,730
Finite-Lived Intangible Assets, Net [Abstract]      
Cost 202,214   202,214
Accumulated Amortization (62,166)   (58,146)
Accumulated Impairment Loss (1,025)   (1,025)
Net Intangible Assets 139,023   143,043
Contract and Customer-Related [Member]      
Finite-Lived Intangible Assets, Net [Abstract]      
Accumulated Amortization (49,911)   (46,611)
Accumulated Impairment Loss (1,025)   (1,025)
Net Intangible Assets 122,148   125,448
Acquired Technologies [Member]      
Finite-Lived Intangible Assets, Net [Abstract]      
Accumulated Amortization (5,432)   (5,151)
Accumulated Impairment Loss 0   0
Net Intangible Assets 6,968   7,249
Trade Names - Amortizable [Member]      
Finite-Lived Intangible Assets, Net [Abstract]      
Accumulated Amortization (6,823)   (6,384)
Accumulated Impairment Loss 0   0
Net Intangible Assets 9,907   $ 10,346
Supply Chain Management Group [Member]      
Goodwill [Roll Forward]      
Balance as of beginning of period 63,113    
Balance as of end of period 63,113    
IT, Energy and Management Consulting [Member]      
Goodwill [Roll Forward]      
Balance as of beginning of period 30,883    
Balance as of end of period 30,883    
Aviation Group [Member]      
Goodwill [Roll Forward]      
Balance as of beginning of period 104,549    
Balance as of end of period $ 104,549