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TENANT LEASES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Customer	Dec. 31, 2010 Customer	Dec. 31, 2009 Customer
Operating Leases, Future Minimum Payments Receivable [Abstract]
2012	87,873
2013	82,153
2014	75,099
2015	69,636
2016	65,245
Thereafter	574,137
Total	954,143
Customer Concentration Risk [Member]
Operating Leases, Future Minimum Payments Receivable [Abstract]
Number of Customers Representing Amounts Greater Than Concentration Risk Threshold	0	0	0
Concentration Risk, Benchmark Threshold Percent	10.00%	10.00%	10.00%

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Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

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Future rental payments receivable within one year of the balance sheet date under an operating lease.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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