Quarterly report pursuant to Section 13 or 15(d)

Earnings Loss Per Share - Additional Information (Detail)

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Earnings Loss Per Share - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Common Stock Equivalents
       
Antidilutive Securities Excluded from Computation of Earnings Per Share        
Shares excluded from diluted earnings (loss) per common share 55,200,000 54,700,000 55,200,000 54,700,000
Unvested Restricted Stock Grants
       
Antidilutive Securities Excluded from Computation of Earnings Per Share        
Shares excluded from diluted earnings (loss) per common share 1,941,000     1,686,500