Goodwill and Other Intangible Assets - Changes in Goodwill and Other Identifiable Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill
Goodwill, beginning balance	$ 956,153	$ 840,582
Additions	1,129,186	119,295
Foreign currency translation	68,649	(3,724)
Goodwill, ending balance	2,153,988	956,153	$ 840,582
Other Intangible Assets, Net
Other intangible assets, net, beginning balance	618,510	521,213
Additions	796,544	139,982
Amortization	(51,993)	(40,870)	(34,878)
Foreign currency translation	37,331	(1,815)
Other intangible assets, net, ending balance	1,400,392	618,510	521,213
Automotive
Goodwill
Goodwill, beginning balance	607,558	555,003
Additions	1,089,767	56,518
Foreign currency translation	68,183	(3,963)
Goodwill, ending balance	1,765,508	607,558	555,003
Industrial
Goodwill
Goodwill, beginning balance	172,593	136,079
Additions	17,921	36,267
Foreign currency translation	577	247
Goodwill, ending balance	191,091	172,593	136,079
Business Products
Goodwill
Goodwill, beginning balance	82,100	56,499
Additions	0	25,609
Foreign currency translation	(111)	(8)
Goodwill, ending balance	81,989	82,100	56,499
Electrical/ Electronic Materials
Goodwill
Goodwill, beginning balance	93,902	93,001
Additions	21,498	901
Foreign currency translation	0	0
Goodwill, ending balance	$ 115,400	$ 93,902	$ 93,001