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Other Real Estate Investments - Narrative (Details)
1 Months Ended 3 Months Ended
Sep. 30, 2016
USD ($)
bed
Jul. 31, 2016
USD ($)
bed
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Oct. 31, 2017
USD ($)
Real Estate Properties [Line Items]          
Preferred equity investment     $ 5,600,000    
Mortgage Loan Receivable          
Real Estate Properties [Line Items]          
Mortgage loan     12,500,000    
Providence Group | Mortgage Loan Receivable          
Real Estate Properties [Line Items]          
Interest income     300,000    
Mortgage loan         $ 12,500,000
Mortgage loan receivable interest rate (percent)         9.00%
Cascadia Development, LLC          
Real Estate Properties [Line Items]          
Preferred equity investment $ 2,300,000 $ 2,200,000      
Preferred equity investment minimum yield 12.00% 12.00%      
Number of beds planned for construction | bed 99 99      
Initial lease yield (percent) 9.00% 9.00%      
Cascadia Development, LLC | Prime Rate          
Real Estate Properties [Line Items]          
Basis spread of preferred equity investment yield 9.50% 9.50%      
Preferred Equity Investment          
Real Estate Properties [Line Items]          
Interest income     100,000 $ 200,000  
Interest income distribution from other real estate investment     $ 0 $ 0