Goodwill and Long-Lived Assets - Other Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Amortized intangible assets
Gross Carrying Amount	$ 51,992	$ 47,690
Accumulated Amortization	(11,449)	(6,243)
Customer relationships
Amortized intangible assets
Gross Carrying Amount	39,474	36,131
Accumulated Amortization	(4,460)	(1,284)
Patents
Amortized intangible assets
Gross Carrying Amount	4,504	4,028
Accumulated Amortization	(3,821)	(3,300)
Technology
Amortized intangible assets
Gross Carrying Amount	2,500	2,500
Accumulated Amortization	(644)	(477)
Trade names
Amortized intangible assets
Gross Carrying Amount	4,288	3,912
Accumulated Amortization	(1,461)	(394)
License agreements
Amortized intangible assets
Gross Carrying Amount	640	583
Accumulated Amortization	(640)	(583)
Other
Amortized intangible assets
Gross Carrying Amount	586	536
Accumulated Amortization	$ (423)	$ (205)