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Goodwill and Intangible Assets - Intangible Assets - Finite Life (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Cost $ 100,117 $ 100,022
Accumulated Amortization 32,729 25,065
Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 1,439 1,456
Accumulated Amortization 1,439 1,456
Employment Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 733 733
Accumulated Amortization 733 677
Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 15,867 15,867
Accumulated Amortization 5,232 4,027
Customer Lists [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 77,497 77,497
Accumulated Amortization 21,854 17,756
Non-compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 1,118 1,118
Accumulated Amortization 368 257
Tradename [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 1,390 1,390
Accumulated Amortization 232 162
Backlog [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 4,270 4,270
Accumulated Amortization 3,558 1,423
Foreign Currency Adjustments [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost (2,197) (2,309)
Accumulated Amortization $ (687) $ (693)