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Product Warranties - Product Warranty Activities (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Guarantees [Abstract]    
Beginning of period $ 5,205 $ 6,266
Assumed product warranty liability from Newport Merger 3,040  
Provision for product warranties 2,991 2,095
Direct charges to warranty liability (3,202) (2,434)
Foreign currency translation 8 (51)
End of period $ 8,042 $ 5,876