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Earnings (Loss) Per Share - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2010
Earnings Loss Per Share [Line Items]  
Revision to net loss attributable to common stockholders from $29.7 million to $28.1 million
Revision to the basic and diluted weighted average common shares outstanding from 48.4 million to 92.0 million shares
Decrease in basic and diluted net loss per share from $0.61 per share to $0.31 per share