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Summary of Significant Accounting Policies - Additional Information (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
Property
Arrangement
shares
Jun. 30, 2018
USD ($)
Property
Arrangement
shares
Jan. 01, 2018
USD ($)
Dec. 31, 2017
USD ($)
Summary Of Significant Accounting Policies [Line Items]        
Cumulative adjustment to partners' capital | $       $ (216,948)
Number of lessee arrangements | Arrangement 6 6    
Restricted Unit Awards [Member] | Burlington [Member] | Maximum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Approved grant of restricted units and other awards to employees | shares 3,000,000 3,000,000    
RUAs granted with vesting range   3 years    
Restricted Unit Awards [Member] | Burlington [Member] | Minimum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
RUAs granted with vesting range   3 months    
ASU 2017-08 [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Cumulative adjustment to partners' capital | $     $ 217,000  
Decrease in investment income | $ $ 17,000 $ 34,000    
Greens Hold Co [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Number of Real Estate Properties | Property 1 1    
Jade Park [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Number of Real Estate Properties | Property 1 1    
Suites on Paseo [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Number of Real Estate Properties | Property 1 1