Stock-Based Compensation and Stock Purchase Plans - Restricted Stock Units - Additional Information (Detail) (Restricted Stock Units (RSUs) [Member], USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Share Based Compensation Arrangements [Line Items]
Option vesting period	3 years
Granted, Shares	190,002	388,000	0
Aggregate fair value of awards		$ 2.00
Shares settled with Company's common stock	202,668
Value of the restricted stock vested	0.8	0.4	0.6
Unrecognized compensation cost	$ 0.5
Expected weighted average period of recognizing compensation cost	1 year 3 months 18 days
Director [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Option vesting period	1 year