Organization and Description of Business (Details) ft² in Millions, $ in Billions	3 Months Ended
	Mar. 31, 2017 USD ($) ft² market States
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General partnership interest (as a percent)	97.00%
Purchased property inception to current date | $	$ 4.3
Gross leasable area of real estate in portfolio (in square feet) | ft²	17.8
Concentration Risk [Line Items]
Percentage of gross leasable area on-campus/aligned	96.00%
Number of states in which the Company operates | States	31
Maximum state gross leasable area (as a percent)	13.00%
Percentage of gross leasable area located in the top 75 Metro statistical areas	92.00%
Minimum
Concentration Risk [Line Items]
Number of markets where the Company is concentrated	15
Maximum
Concentration Risk [Line Items]
Number of markets where the Company is concentrated	20