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Related Party Transactions - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
May 13, 2013
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Construction Contracts          
Related Party Transactions          
Revenue from contracts with affiliated entities   $ 0 $ 300,000 $ 0 $ 1,500,000
Gross profit from related parties   0 100,000 0 300,000
Real Estate Service Fees          
Related Party Transactions          
Revenue from contracts with affiliated entities   0 0 0 0
Cost Reimbursements          
Related Party Transactions          
Revenue from contracts with affiliated entities   $ 0 $ 0 $ 0 $ 0
Tax Protection Agreements | Operating Partnership          
Related Party Transactions          
Future sale period for properties 7 years        
Future sale period for properties in limited number of cases 10 years