Long-lived Assets by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Segment Reporting Information [Line Items]
Property and equipment, net	$ 126,345		$ 124,169
United States
Segment Reporting Information [Line Items]
Property and equipment, net	92,282	[1]	88,284	[1]
International
Segment Reporting Information [Line Items]
Property and equipment, net	$ 34,063	[1]	$ 35,885	[1]

[1] Total long-lived assets includes property and equipment, net.