FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Financial Assets:
Cash and cash equivalents	$ 118		$ 174
Carrying Amount [Member]
Financial Assets:
Cash and cash equivalents	118	[1]	174	[1]
Mortgage loans receivable, net of discount	4,112	[1]	4,110	[1]
Financial Liabilities:
Mortgage notes payable	623,910	[1]	628,170	[1]
Unsecured term loan payable	50,000	[1]	50,000	[1]
Notes payable to banks	120,945	[1]	154,516	[1]
Fair Value [Member]
Financial Assets:
Cash and cash equivalents	118		174
Mortgage loans receivable, net of discount	4,361		4,317
Financial Liabilities:
Mortgage notes payable	674,694		674,462
Unsecured term loan payable	50,897		50,000
Notes payable to banks	$ 120,686		$ 153,521

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