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Variable Interest Entities (Details)
$ in Millions
Dec. 31, 2019
USD ($)
properties
Dec. 31, 2018
USD ($)
Variable Interest Entity [Line Items]    
Number of Real Estate Properties | properties 62  
Variable Interest Entity, Not Primary Beneficiary [Member]    
Variable Interest Entity [Line Items]    
Assets $ 242.9 $ 232.8
Variable Interest Entity, Primary Beneficiary    
Variable Interest Entity [Line Items]    
Assets 136.8 94.8
Liabilities $ 11.8 $ 43.4
Number of Real Estate Properties 2 2