Annual report pursuant to Section 13 and 15(d)

Orion Office REIT, Summary of Significant Accounting Policies (Details)

v3.22.4
Orion Office REIT, Summary of Significant Accounting Policies (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Entity Information [Line Items]        
Reduction to rental revenue $ 1,500,000 $ 0 $ 0  
Lease termination income 1,400,000 300,000 0  
Property management fee revenue 800,000 300,000 0  
Impairment of unconsolidated joint venture 0 0    
Impairments of ROU assets 0 0 0  
Restricted cash 34,673,000 0 3,915,000 $ 3,719,000
Franchise and state and local tax expense 200,000 200,000    
Provisions related to material uncertain income tax positions $ 0 $ 0    
Impounds Related To Mortgages Payable        
Entity Information [Line Items]        
Restricted cash     3,400,000  
Security Deposits Related To Mortgages Payable        
Entity Information [Line Items]        
Restricted cash     $ 500,000  
Building        
Entity Information [Line Items]        
Real estate assets, useful life 35 years      
Building, Fixtures And Improvements | Minimum        
Entity Information [Line Items]        
Real estate assets, useful life 5 years      
Building, Fixtures And Improvements | Maximum        
Entity Information [Line Items]        
Real estate assets, useful life 15 years