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Summary of Business Sales Segmentation as per Location (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Net Sales:        
Net sales $ 72,486 $ 71,635 $ 205,574 $ 221,043
US        
Net Sales:        
Net sales 53,167 54,552 146,231 162,602
International        
Net Sales:        
Net sales $ 19,319 $ 17,083 $ 59,343 $ 58,441