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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 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Customer A [Member]
        
Revenue, Major Customer [Line Items]        
Percentage of total net revenues 18.90% 18.80% 19.60% 16.80%
Customer B [Member]
        
Revenue, Major Customer [Line Items]        
Percentage of total net revenues 13.80% 11.90% 13.40% 10.80%