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Goodwill and Other Intangible Assets, Net - Schedule of Other Intangible Assets, Net (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Total carrying value $ 3,313,562 $ 3,331,211
Total accumulated amortization (339,385) (291,889)
Other intangible assets, net 2,974,177 3,039,322
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Total carrying value 2,638,998 2,658,659
Total accumulated amortization (193,263) (156,906)
Trade names & patents    
Finite-Lived Intangible Assets [Line Items]    
Total carrying value 177,566 177,770
Total accumulated amortization (21,760) (19,593)
Technological know-how    
Finite-Lived Intangible Assets [Line Items]    
Total carrying value 463,989 451,016
Total accumulated amortization (106,181) (93,051)
Other    
Finite-Lived Intangible Assets [Line Items]    
Total carrying value 33,009 43,766
Total accumulated amortization $ (18,181) $ (22,339)