Certain Balance Sheet Accounts - Summary of Non-current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Deferred tax liability	$ 852	$ 218
Deferred rent	6,678	6,936
Other	2,612	2,309
Total non-current liabilities	$ 10,142	$ 9,463