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Acquisitions and Dispositions - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 29, 2016
Dec. 31, 2016
Dec. 31, 2018
Dec. 31, 2017
Acquisition Date [Line Items]        
Goodwill   $ 588,585 $ 586,996 $ 591,047
Total purchase price, net of cash and cash equivalents acquired   $ 939,591    
Newport [Member]        
Acquisition Date [Line Items]        
Current assets (including cash) $ 186,137      
Inventory 142,714      
Intangible assets 404,506      
Goodwill 396,027      
Property, plant and equipment 119,932      
Long-term assets 22,725      
Total assets acquired 1,272,041      
Current liabilities 95,156      
Intangible liability 4,302      
Other long-term liabilities 165,305      
Total liabilities assumed 264,763      
Fair value of assets acquired and liabilities assumed 1,007,278      
Less: cash and cash equivalents acquired (61,463)      
Total purchase price, net of cash and cash equivalents acquired $ 945,815