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Related Party Transactions - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
May 13, 2013
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Operating Partnership            
Related Party Transactions            
Credit facility, amount outstanding   $ 9.5   $ 9.5    
Construction Contracts            
Related Party Transactions            
Revenue from contracts with affiliated entities   15.9 $ 0.0 35.4 $ 0.0  
Gross profit from related parties   0.6 $ 0.0 1.3 $ 0.0  
Due from related parties   8.9   8.9   $ 1.9
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          
Executive Officer | Construction Contracts            
Related Party Transactions            
Gross profit from related parties           $ 3.1
Related party amount of transaction       80.7    
Gross profit margin, related parties           3.80%
Credit facility, amount outstanding   $ 9.5   $ 9.5