Goodwill and Intangible Assets - Intangible Assets - Finite Life (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Cost	$ 99,350	$ 100,022
Accumulated Amortization	38,622	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	6,360	4,027
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	77,497	77,497
Accumulated Amortization	26,041	17,756
Non-compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,118	1,118
Accumulated Amortization	478	257
Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,390	1,390
Accumulated Amortization	301	162
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	4,270	4,270
Accumulated Amortization	4,270	1,423
Foreign Currency Adjustments [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	(2,964)	(2,309)
Accumulated Amortization	$ (1,000)	$ (693)