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Product Warranty Reserve - Roll Forward of Product Warranty Reserve (Detail) - Warranty Reserves [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning of period balance $ 892 $ 1,140 $ 1,229
Additions charged to costs and expenses 74 (45) 443
Warranty usage (158) (133) (475)
Currency translation (94) (70) (57)
End of period balance $ 714 $ 892 $ 1,140