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Transactions With Tier Reit, Inc. - Narrative (Details)
$ in Thousands, shares in Millions
12 Months Ended
Jun. 14, 2019
USD ($)
shares
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Business Acquisition [Line Items]        
Reverse stock split ratio 0.25      
TIER        
Business Acquisition [Line Items]        
Stock conversation ratio 2.98      
Fair value of assets acquired and liabilities assumed $ 1,600,000      
Acquisition expenses   $ 0 $ 428 $ 52,900
TIER REIT, Inc.        
Business Acquisition [Line Items]        
Number of shares issued | shares 166      
Acquisition expenses       $ 52,900