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Acquisitions (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
property
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Business Acquisition [Line Items]      
Payments to acquire real estate $ 58,205 $ 0 $ 0
2019 Operating Property Acquisitions      
Business Acquisition [Line Items]      
Number of retail operating properties acquired | property 1    
Number of parking garages acquired | property 1    
2019 Operating Property Acquisitions | Retail Operating Property      
Business Acquisition [Line Items]      
Payments to acquire real estate $ 29,000    
2019 Operating Property Acquisitions | Parking Garage      
Business Acquisition [Line Items]      
Payments to acquire real estate $ 29,500    
Lease Agreements | 2019 Operating Property Acquisitions      
Business Acquisition [Line Items]      
Weighted average useful life (in years) 5 years 7 months 6 days