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Merger With Tier REIT, Inc. - Narrative (Details)
$ in Thousands, shares in Millions
3 Months Ended 6 Months Ended
Jun. 14, 2019
USD ($)
shares
Mar. 25, 2019
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Business Acquisition [Line Items]            
Reverse stock split ratio 0.25          
TIER            
Business Acquisition [Line Items]            
Stock conversion ratio   2.98        
Fair value of assets acquired and liabilities assumed $ 1,600,000          
Acquisition expenses     $ 63 $ 49,800 $ 428 $ 49,800
TIER | Rental property revenues            
Business Acquisition [Line Items]            
Amount reported in consolidated revenue     $ 51,700 $ 9,700 $ 102,700 $ 9,700
Former TIER Common Stockholders            
Business Acquisition [Line Items]            
Number of shares issued | shares 166