Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Details)

v3.19.1
Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Goodwill [Roll Forward]      
Balance as of beginning of period $ 198,622    
Increase from acquisition 60,590    
Balance as of end of period 259,212    
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 5,000 $ 4,000  
Finite-Lived Intangible Assets, Net [Abstract]      
Cost 265,164   $ 202,164
Accumulated Amortization (111,238)   (106,247)
Accumulated Impairment Loss (1,025)   (1,025)
Net Intangible Assets 152,901   94,892
Supply Chain Management      
Goodwill [Roll Forward]      
Balance as of beginning of period 63,190    
Increase from acquisition 0    
Balance as of end of period 63,190    
Federal Services      
Goodwill [Roll Forward]      
Balance as of beginning of period 30,883    
Increase from acquisition 0    
Balance as of end of period 30,883    
Aviation      
Goodwill [Roll Forward]      
Balance as of beginning of period 104,549    
Increase from acquisition 60,590    
Balance as of end of period 165,139    
Contract and customer-related      
Finite-Lived Intangible Assets, Net [Abstract]      
Cost 228,094   173,094
Accumulated Amortization (90,169)   (86,076)
Accumulated Impairment Loss (1,025)   (1,025)
Net Intangible Assets 136,900   85,993
Acquired technologies      
Finite-Lived Intangible Assets, Net [Abstract]      
Cost 12,400   12,400
Accumulated Amortization (8,815)   (8,533)
Accumulated Impairment Loss 0   0
Net Intangible Assets 3,585   3,867
Trade names      
Finite-Lived Intangible Assets, Net [Abstract]      
Cost 24,670   16,670
Accumulated Amortization (12,254)   (11,638)
Accumulated Impairment Loss 0   0
Net Intangible Assets $ 12,416   $ 5,032