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