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Net Income Per Share of Common Stock (Detail)	3 Months Ended		6 Months Ended
Net Income Per Share of Common Stock (Detail)	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Subject to Forfeiture	4,161,000	4,313,000	4,170,000	4,313,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	326,000	17,000	210,000	60,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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