FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Financial Assets:
Cash and Cash Equivalents, at Carrying Value	$ 10	$ 1,258	$ 118	$ 174
Interest Rate Swap Asset	1,744	0
Carrying Amount [Member]
Financial Assets:
Cash and Cash Equivalents, at Carrying Value	10	1,258
Mortgage loans receivable, net of discount	9,277	9,323
Interest Rate Swap Asset	1,744	0
Financial Liabilities:
Mortgage notes payable	595,460	607,766
Unsecured term loans payable	130,000	130,000
Notes payable to banks	176,933	76,160
Interest rate swap liability	0	645
Fair Value [Member]
Financial Assets:
Cash and Cash Equivalents, Fair Value Disclosure	10	1,258
Mortgage loans receivable, net of discount	9,483	9,748
Interest Rate Swap Asset	1,744	0
Financial Liabilities:
Mortgage notes payable	623,429	661,408
Unsecured term loans payable	125,675	130,776
Notes payable to banks	177,119	76,160
Interest rate swap liability	$ 0	$ 645