Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards (Tables)

6 Months Ended

Jun. 30, 2011

Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards

Summary of the entity's investment in real estate assets, excluding assets held for syndication and assets held for sale

	As of June 30,
	2011	2010
Commercial real estate:
Number of properties	34	33
Rentable square feet	6,747,815	6,418,835