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Acquisitions - Summary of Purchase Price (Detail) - USD ($)
$ in Thousands
 6 Months Ended
Apr. 29, 2016
Jun. 30, 2016
Jun. 30, 2015
Business Acquisition [Line Items]      
Total purchase price, net of cash and cash equivalents acquired   $ 939,591 $ 9,910
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