Supplemental Detail for Certain Components of Consolidated Balance Sheets (Details 2) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Other assets, net
Restricted escrow deposits	$ 27,340,000	$ 10,158,000
Deferred financing costs, net	24,381,000	21,323,000
Notes receivable issued in connection with property sales	18,440,000	19,078,000
Prepaid expenses	12,592,000	11,674,000
Impounds related to mortgages payable	5,511,000	5,555,000
Corporate assets, net	1,559,000	1,259,000
Loans receivable		48,844,000
Other items	3,034,000	2,096,000
Total other assets	97,797,000	127,133,000
Credit Facility
Other assets, net
Deferred financing costs, net	$ 4,940,000	$ 7,146,000