Stock Plan - Additional Information (Detail)				12 Months Ended
	Dec. 31, 2013 Installment	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 1993 Omnibus Stock Plan Installment
Stock Option Plan Activity [Line Items]
Common stock shares reserved				3,000,000
Maximum exercise period of options or restricted stock granted				10 years
Maximum option exercisable term for general termination				60 days
Maximum option exercisable term for termination due to death and disability				180 days
Options exercisable number of installments	2			3
Options outstanding to purchase common stock	0	55,000	55,000	0
Options available for grant				0