SPONSORS AND MANAGEMENT WARRANTS (Details) (USD $)				0 Months Ended					0 Months Ended	1 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Dec. 31, 2012 Brookfield	Dec. 07, 2012 Blackstone Real Estate Partners	Dec. 07, 2012 Fairholme Fund and the Fairholme Focused Income Fund	Jun. 30, 2013 Sponsors Warrants	Dec. 31, 2012 Sponsors Warrants	Nov. 09, 2010 Sponsors Warrants	Nov. 09, 2012 Sponsors Warrants Brookfield	Feb. 28, 2011 Management Warrants	Jun. 30, 2013 Management Warrants	Dec. 31, 2012 Management Warrants	Feb. 28, 2011 Management Warrants David R. Weinreb	Feb. 28, 2011 Management Warrants Grant Herlitz	Feb. 28, 2011 Management Warrants Andrew C. Richardson
Sponsors and Management Warrants
Issuance of warrants to purchase common stock (in shares)						1,916,667		8,000,000	1,525,272	2,862,687
Estimated initial value								$ 69,500,000
Exercise price (in dollars per share)				$ 30.00	$ 30.00			$ 50.00	$ 50.00				$ 42.23	$ 42.23	$ 54.50
Proceeds from issuance of management warrants										19,000,000
Proceeds from exercise of warrants									76,300,000
Number of shares of common stock under warrants repurchased				333,333	1,916,667				2,308,061
Settlement of warrant liability for cash consideration				67,500,000
Payments for repurchase of warrants									89,300,000
Cash consideration paid net of exercise price									13,000,000
Additional paid-in capital			108,600,000
Warrant liabilities	$ 267,800,000	$ 123,573,000				$ 126,400,000	$ 58,500,000				$ 141,400,000	$ 65,100,000