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SUBSEQUENT EVENTS (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended9 Months Ended1 Months Ended
Oct. 31, 2011
Sep. 30, 2011
Oct. 31, 2011
Purchase Agreement
squarefeet
Oct. 26, 2011
Purchase Agreement
unit
SUBSEQUENT EVENTS    
Square foot of office building (in square foot)  75,425 
Number of units of office building (in units)   3
Purchase price of office building$ 8.2$ 38.4$ 8.2