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MORTGAGES PAYABLE Scheduled Principal Repayments (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Mortgage Loans on Real Estate [Abstract]
2012	$ 298,335
2013	128,059
2014	104,667
2015	79,710
2016	74,722
Thereafter	103,314
Long-term debt and convertible notes payable	$ 788,807

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Amount of long-term debt maturities after year five following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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Amount of long-term debt maturing within the next twelve months following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates.

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