Acquisition - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013
Business Combinations [Abstract]
Purchase price of business acquisition	$ 17,000
Finite-lived intangibles acquired from business acquisition	8,778	6,306
Goodwill acquired from business acquisition	441
Business acquisition purchase price hold back	2,000
Liabilities assumed in business acquisition and paid	21,900
Business acquisition assets acquired	47,000
Business acquisition liabilities assumed	$ 39,500