Goodwill and Other Intangible Assets, Net - Schedule of Other Intangible Assets, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Total carrying value	$ 630,735	$ 545,963
Total accumulated amortization	(206,597)	(180,180)
Other intangible assets, net	424,138	365,783
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Total carrying value	414,045	371,270
Total accumulated amortization	(99,300)	(82,555)
Trade names & patents
Finite-Lived Intangible Assets [Line Items]
Total carrying value	38,503	30,679
Total accumulated amortization	(14,436)	(12,198)
Technological know-how
Finite-Lived Intangible Assets [Line Items]
Total carrying value	153,410	119,544
Total accumulated amortization	(73,289)	(68,292)
Other
Finite-Lived Intangible Assets [Line Items]
Total carrying value	24,777	24,470
Total accumulated amortization	$ (19,572)	$ (17,135)