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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2011
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	18. SUBSEQUENT EVENTS On October 28, 2011, the Company sold two office properties (Five Greentree Centre and Lake Center II), containing a total of 206,243 net rentable square feet in Marlton, New Jersey for an aggregate sales price of $22.8 million. Five Greentree Centre and Lake Center II were 96.1% and 47.8% occupied, respectively, at the date of sale. The Company has evaluated subsequent events through the date the financial statements were issued.