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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2012
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS On February 25, 2013, the Company sold a portfolio of eight office properties, totaling 800,556 square feet, in Lawrenceville, New Jersey, for a sales price of $121.0 million. The Company has evaluated subsequent events through the date the financial statements were issued.