Organization and Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2012

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of stabilized portfolio of operating properties

The following table of office buildings (the "Office Properties") and industrial buildings (the "Industrial Properties") summarizes our stabilized portfolio of operating properties as of March 31, 2012. As of March 31, 2012, all of our properties are owned and all of our business is currently conducted in the state of California with the exception of six office properties located in the state of Washington.

	Number of Buildings	Rentable Square Feet	Number of Tenants	Percentage Occupied
Office Properties(1)	111	11,797,818	440	90.0	%
Industrial Properties	39	3,413,354	60	97.0	%
Total Stabilized Portfolio	150	15,211,172	500	91.6	%

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(1) Includes seven office properties acquired in one transaction during the three months ended March 31, 2012 encompassing 374,139 rentable square feet (see Note 2 for additional information).