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Business Segment, Geographic Area, Product and Significant Customer Information - Customers with Net Revenues Greater than 10% of Total Net Revenues (Detail)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Customer A [Member]
   
Revenue, Major Customer [Line Items]    
Percentage of total net revenues 20.30% 14.70%
Customer B [Member]
   
Revenue, Major Customer [Line Items]    
Percentage of total net revenues 13.10% 9.60%