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Product Warranties - Product Warranty Activities (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Guarantees [Abstract]    
Beginning of period $ 5,205 $ 6,266
Product warranty liability from Newport Merger 3,040  
Provisions for product warranties 8,858 4,343
Direct charges to warranty liability (8,685) (5,296)
Foreign currency translation (157) (108)
End of period $ 8,261 $ 5,205