Real Estate Investments - Purchase Price Allocation (Details) - Broadmoor Austin Associates [Member] $ in Thousands	Jun. 22, 2015 USD ($)
Business Acquisition [Line Items]
Building, land and improvements	$ 163,271
Land inventory	6,045
Intangible assets acquired	50,637	[1]
Below market lease liabilities assumed	(8,600)	[2]
Total purchase price	211,353
Return of existing equity method investment	(66,324)
Gain on remeasurement	(758)
Net working capital assumed	(450)
Total cash payment at settlement	$ 143,821

[1] Weighted average amortization period of 4.0 years.

[2] Weighted average amortization period of 1.5 years