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Product Warranties - Product Warranty Activities (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Guarantees [Abstract]    
Beginning of period $ 8,261 $ 5,205
Assumed product warranty liability from Newport Merger   3,040
Provision for product warranties 7,555 2,991
Direct charges to warranty liability (6,210) (3,202)
Foreign currency translation 126 8
End of period $ 9,732 $ 8,042