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Acquisitions - Summary of Purchase Price (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 29, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition [Line Items]        
Total purchase price, net of cash and cash equivalents acquired   $ 939,591 $ 9,910 $ 86,950
Newport [Member]        
Business Acquisition [Line Items]        
Cash paid for outstanding shares $ 905,254      
Settlement of share-based compensation awards 8,824      
Cash paid for Newport debt 93,200      
Total purchase price 1,007,278      
Less: cash and cash equivalents acquired (61,463)      
Total purchase price, net of cash and cash equivalents acquired $ 945,815