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Commitments and Contingencies (Details)
12 Months Ended
Jan. 30, 2015
USD ($)
Dec. 31, 2020
USD ($)
property
Dynex    
Loss Contingencies [Line Items]    
Settlement award $ 24,800,000  
VAA | VAA    
Loss Contingencies [Line Items]    
Contributed properties with earn-out provisions | property   10
Earn-out provision terms   2 years
Liability   $ 10,000,000
Mezzanine loan | UHF    
Loss Contingencies [Line Items]    
Loan guarantee amount   $ 24,300,000