FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Financial Assets [Abstract]
Cash and cash equivalents	$ 1,258	[1]	$ 174	[1]
Mortgage loans receivable, net of discount	9,323	[1]	4,110	[1]
Financial Liabilities [Abstract]
Mortgage notes payable	607,766	[1]	628,170	[1]
Unsecured term loans payable	130,000	[1]	50,000	[1]
Notes payable to banks	76,160	[1]	154,516	[1]
Interest rate swap liability	645	[1]	0	[1]
Estimate of Fair Value, Fair Value Disclosure [Member]
Financial Assets [Abstract]
Cash and cash equivalents	1,258		174
Mortgage loans receivable, net of discount	9,748		4,317
Financial Liabilities [Abstract]
Mortgage notes payable	661,408		674,462
Unsecured term loans payable	130,776		50,000
Notes payable to banks	76,160		153,521
Interest rate swap liability	$ 645		$ 0

[1] Carrying amounts shown in the table are included in the Consolidated Balance Sheets under the indicated captions, except as indicated in the notes below.