Business Segment, Geographic Area, Product and Significant Customer Information - Customers with Net Revenues Greater than 10% of Total Net Revenues (Detail) (Sales Revenue, Net [Member])	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Customer A [Member]
Revenue, Major Customer [Line Items]
Percentage of total net revenues	19.50%	16.40%	19.60%	16.70%
Customer B [Member]
Revenue, Major Customer [Line Items]
Percentage of total net revenues	11.20%	13.50%	12.70%	11.80%