Segment, Customer and Geographic Information - Customer Accounted Revenues (Detail) (Sales [Member])	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	10.00%	10.00%
Europe, Middle East, & Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	10.00%	10.00%
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	11.00%	7.00%
Other Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	7.00%	5.00%
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales	28.00%	22.00%