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Commitments and Contingencies - Narrative (Details) - USD ($)
 3 Months Ended
Mar. 31, 2019
Jan. 01, 2019
Loss Contingencies [Line Items]    
Operating lease right-of-use asset $ 2,890,000  
Lease liabilities 2,978,000  
Accounting Standards Update 2016-02    
Loss Contingencies [Line Items]    
Operating lease right-of-use asset   $ 2,890,000
Lease liabilities   $ 3,114,000
University House Communities Group, Inc    
Loss Contingencies [Line Items]    
Increase in accrued loss contingency relating to indemnity claims 13,500  
Loss contingency, range of possible loss, portion not accrued $ 7,000,000