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Product Warranty Reserve - Roll Forward of Product Warranty Reserve (Detail) - Warranty Reserves [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]    
Beginning of period balance $ 714 $ 892
Additions charged to income 3 32
Warranty usage (41) (107)
Currency translation 12 (34)
End of period balance $ 688 $ 783