Earnings Per Share - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Earnings Per Share [Abstract]
Options to purchase shares, contingently issuable shares, and common stock warrants excluded from diluted net income per share computation	3,100,000	3,800,000
Common stock outstanding	37,925,849		38,854,989