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

6 Months Ended

Jun. 30, 2015

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

Summary of the entity's investment in real estate assets, including number of properties and rentable square feet of real estate

	As of June 30,
	2015	2014
Commercial real estate:
Number of properties	36	39
Rentable square feet	9,639,740	9,686,215