FAIR VALUE DISCLOSURES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable, Face Value	$ 21,000	[1]	$ 0	[1]
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable	21,193	[2]	0	[2]
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable	21,000		0
Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities, Face Amount	225,000	[1]	225,000	[1]
Senior Notes [Member] | Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	225,000	[2]	225,000	[2]
Senior Notes [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	241,875		227,813
Mortgage indebtedness [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities, Face Amount	157,380	[1]	157,898	[1]
Mortgage indebtedness [Member] | Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	157,872	[2]	158,398	[2]
Mortgage indebtedness [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	173,548		172,829
Amended Secured Revolving Credit Facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities, Face Amount	42,500	[1]	0	[1]
Amended Secured Revolving Credit Facility [Member] | Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	42,500	[2]	0	[2]
Amended Secured Revolving Credit Facility [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	$ 42,500		$ 0

[1] Face value represents amounts contractually due under the terms of the respective agreements.

[2] Carrying amount represents the book value of financial instruments and includes unamortized premiums (discounts).