Common Stock and Stock-Based Compensation Plans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted under stock incentive plans vesting rate, year one	25.00%
Remaining shares vesting period	36 months
Unrecognized compensation expense	$ 4,837
Unrecognized compensation expense, weighted-average period of recognition	1 year 3 months 18 days
Non Employee Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted under stock incentive plan vesting rate, each anniversary	25.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vesting period	4 years
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted percentage	400.00%