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Related Party Transactions - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Nov. 20, 2014
May 13, 2013
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Related Party Transactions          
Fees from contracts with affiliated entities     $ 0.0 $ 0.0 $ 0.0
Operating Partnership | Maximum          
Related Party Transactions          
Future sale period for properties   7 years      
Future sale period for properties in limited number of cases   10 years      
Construction Contracts          
Related Party Transactions          
Revenue from contracts with affiliated entities     7.6 26.7 9.6
Gross profit from related parties     0.4 1.0 0.3
Due from related parties     0.2 3.4  
Cost Reimbursements          
Related Party Transactions          
Revenue from contracts with affiliated entities     $ 0.0 $ 0.0 $ 0.0
Tax Protection Agreement | Operating Partnership          
Related Party Transactions          
Amount paid under tax protection agreements $ 1.3