FAIR VALUE DISCLOSURES (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable, Face Value	$ 21,897	[1]	$ 0	[1]
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable	22,092	[2]	0	[2]
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable	22,796		0
Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities, Face Amount	325,000	[1]	225,000	[1]
Senior Notes [Member] | Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	330,861	[2]	225,000	[2]
Senior Notes [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	354,250		227,813
Mortgage indebtedness [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities, Face Amount	157,025	[1]	157,898	[1]
Mortgage indebtedness [Member] | Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	157,513	[2]	158,398	[2]
Mortgage indebtedness [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial liabilities	$ 167,632		$ 172,829

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

[2] Carrying amount represents the book value of financial instruments as of the date specified. Carrying amount of financial liabilities includes net unamortized premiums and carrying amount of financial assets includes net unamortized origination costs.