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Earnings Per Share - Additional Information (Detail)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Earnings Per Share [Abstract]      
Options to purchase shares, contingently issuable shares, and common stock warrants excluded from diluted net income per share computation 1,500,000 1,700,000 3,300,000
Common stock outstanding 38,854,989 39,447,773