Quarterly report pursuant to Section 13 or 15(d)

EARNINGS PER SHARE (Details)

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EARNINGS PER SHARE (Details) (USD $)
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Basic and diluted earnings per share attributable to common and restricted shares of common stock    
Total shares of common stock, basic (in dollars per share) $ 0.16 $ 0.13
Total shares of common stock, diluted (in dollars per share) $ 0.16 $ 0.13
Common Stock
   
Basic and diluted earnings per share attributable to common and restricted shares of common stock    
Total shares of common stock, basic (in dollars per share) $ 0.16 $ 0.13
Total shares of common stock, diluted (in dollars per share) $ 0.16 $ 0.13
Restricted shares of common stock
   
Basic and diluted earnings per share attributable to common and restricted shares of common stock    
Total shares of common stock, basic (in dollars per share) $ 0.15 $ 0.12
Total shares of common stock, diluted (in dollars per share) $ 0.15 $ 0.12