Notes Payable and Other Noncurrent Liabilities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013
Debt Disclosure [Abstract]
Amount of revolving line of credit	$ 50,000
Revolving line of credit facility, expiration date	Dec. 31, 2017
Amount available to be borrowed on the line of credit		50,000
Long-term deferred rent	7,015	6,811
Derivative liability for forward interest rate swap	$ 390