XML 47 R37.htm IDEA: XBRL DOCUMENT

Segment Information and Concentrations of Risk - Schedule of Geographic Concentration of Net Revenues (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues by geographic region	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] \| United States and Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues by geographic region	95.80%	92.70%	95.60%	92.20%
Operating Segments [Member] \| Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues by geographic region	0.80%	1.50%	0.60%	3.00%
Operating Segments [Member] \| Europe, Middle East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues by geographic region	3.30%	5.50%	3.70%	4.40%
Operating Segments [Member] \| Asia and Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues by geographic region	0.10%	0.30%	0.10%	0.40%