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Subsequent Events - Mortgage Loan Agreements (Details) - Mortgages [Member]
$ in Millions
2 Months Ended
Feb. 22, 2017
USD ($)
property
loan
default_notice
Dec. 30, 2016
USD ($)
Mar. 06, 2015
USD ($)
Dec. 31, 2014
USD ($)
Subsequent Event [Line Items]        
Mortgage notes in connection with default from non-recourse loan   $ 11.6 $ 38.1 $ 53.8
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Number of notices of default | default_notice 2      
Number of non-recourse loans in default | loan 2      
Number of properties secured by each non-recourse loan | property 1      
Mortgage notes in connection with default from non-recourse loan $ 41.8