Goodwill and Other Intangible Assets, Net - Schedule of Other Intangible Assets, Net (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Total carrying value	$ 641,664	$ 633,077
Total accumulated amortization	(227,609)	(217,290)
Other intangible assets, net	414,055	415,787
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Total carrying value	414,684	407,636
Total accumulated amortization	(111,796)	(104,800)
Trade names & patents
Finite-Lived Intangible Assets [Line Items]
Total carrying value	39,556	38,771
Total accumulated amortization	(16,175)	(15,241)
Technological know-how
Finite-Lived Intangible Assets [Line Items]
Total carrying value	162,515	161,856
Total accumulated amortization	(79,929)	(76,766)
Other
Finite-Lived Intangible Assets [Line Items]
Total carrying value	24,909	24,814
Total accumulated amortization	$ (19,709)	$ (20,483)