FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Financial Assets:
Cash and Cash Equivalents, at Carrying Value	$ 207	$ 1,258	$ 1,027	$ 174
Interest rate swap assets	1,274	0
Carrying Amount [Member]
Financial Assets:
Cash and Cash Equivalents, at Carrying Value	207	1,258
Mortgage loans receivable, net of discount	9,253	9,323
Interest rate swap assets	1,274	0
Financial Liabilities:
Secured debt	555,831	607,766
Unsecured debt	230,000	130,000
Unsecured bank credit facilities	111,667	76,160
Interest rate swap liabilities	1,116	645
Fair Value [Member]
Financial Assets:
Cash and Cash Equivalents, Fair Value Disclosure	207	1,258
Mortgage loans receivable, net of discount	9,461	9,748
Interest rate swap assets	1,274	0
Financial Liabilities:
Secured debt	581,125	661,408
Unsecured debt	222,378	130,776
Unsecured bank credit facilities	111,776	76,160
Interest rate swap liabilities	$ 1,116	$ 645