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Real Estate Assets - Additional Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
land_parcel
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Real Estate [Abstract]      
Number of parcels of land classified as held for sale | land_parcel 1    
Average period that a tenant is expected to utilize the facility 18 months    
Amortization related to the tenant relationships and lease rights $ 6,614 $ 9,050 $ 14,349
Real Estate Properties [Line Items]      
Intangible assets, accumulated amortization $ 127,712 $ 121,238  
Minimum      
Real Estate Properties [Line Items]      
Remaining amortization period 9 years    
Maximum      
Real Estate Properties [Line Items]      
Remaining amortization period 42 years