Organization and Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of real estate properties

As of March 31, 2015, the following properties were excluded from our stabilized portfolio:

	Number of Properties/Projects	Estimated Rentable Square Feet
Properties held for sale (1)	10	1,044,844
Development projects under construction (2)	6	1,732,000

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(1) Includes one property located in Redmond, Washington and nineproperties located in the Sorrento Mesa/UTC submarkets of San Diego, California. For additional information see Note 3.

(2) Estimated rentable square feet upon completion.

Our stabilized portfolio of operating properties was comprised of the following office properties at March 31, 2015:

	Number of Buildings	Rentable Square Feet	Number of Tenants	Percentage  Occupied
Stabilized Office Properties	101	13,047,720	515	96.1	%