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Product Warranties - Product Warranty Activities (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Guarantees [Abstract]    
Beginning of period $ 6,266 $ 6,956
Provision for product warranties 2,095 1,589
Direct charges to warranty liability (2,434) (1,476)
Foreign currency translation (51) 48
End of period $ 5,876 $ 7,117