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Product Warranties - Product Warranty Activities (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Guarantees [Abstract]    
Beginning balance $ 6,956 $ 8,266
Provision for product warranties 704 630
Direct charges to warranty liability (656) (1,250)
Foreign currency translation 9 (113)
Ending balance $ 7,013 $ 7,533