Profit Sharing - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation And Retirement Disclosure [Abstract]
Employers matching contribution percentage to 401(k) plan	20.00%
Total employer contributions to 401(k) plan	$ 0.3	$ 0.3	$ 0.5