Segment Information - Long-lived Assets by Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 108,585	$ 109,652
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	101,241	101,858
International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 7,344	$ 7,794