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Net Income Per Share of Common Stock (Detail)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Stock Issued During Period, Shares, Restricted Stock Award, Subject to Forfeiture 4,179,000 4,312,500
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 107,000 127,500