Operating Real Estate (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Document Fiscal Year Focus	2014
Real Estate Investment Property, Net [Abstract]
Principal Amount	$ 783,479,000	$ 638,182,000
Ownership (percentage)	99.98%
Student Housing
Real Estate Investment Property, Net [Abstract]
Number of Properties (property)	2
Cost	44,700,000
Contribution of equity for properties	11,700,000
Ownership (percentage)	80.00%
Non-recourse Mortgage | Student Housing
Real Estate Investment Property, Net [Abstract]
Number of debt instruments assumed	3
Principal Amount	$ 29,100,000