FAIR VALUE DISCLOSURES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable, Face Value	$ 37,506	[1]	$ 11,965	[1]
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable	37,693	[2]	12,017	[2]
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable	37,843		12,826
Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities, Face Amount	411,250	[1]	325,000	[1]
Senior Notes [Member] | Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	414,672	[2]	330,666	[2]
Senior Notes [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	422,038		345,313
Mortgage indebtedness [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities, Face Amount	143,129	[1]	152,322	[1]
Mortgage indebtedness [Member] | Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	143,129	[2]	152,322	[2]
Mortgage indebtedness [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	139,599		152,559
Amended Secured Revolving Credit Facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities, Face Amount	0	[1]	92,500	[1]
Amended Secured Revolving Credit Facility [Member] | Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	0	[2]	92,500	[2]
Amended Secured Revolving Credit Facility [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	$ 0		$ 92,500

[1] Face value for loans receivable, Senior Notes, mortgage indebtedness and the Secured Revolving Credit Facility represents amounts contractually due under the terms of the respective agreements. Face value for preferred equity investments represents amounts paid, plus preferred returns earned less distributions received.

[2] Carrying amounts represent the book value of financial instruments and include unamortized premiums (discounts). Also included in the carrying amounts for loans receivable and preferred equity investments are capitalized origination and transaction costs.