Quarterly report pursuant to Section 13 or 15(d)

Orion Office REIT, Fair Value Measures - Assets at Fair Value Measured on a Non-recurring Basis (Details)

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Orion Office REIT, Fair Value Measures - Assets at Fair Value Measured on a Non-recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets of properties held and used $ 23,339  
Assets of properties held-for-sale 4,782  
Assets 28,121  
Real estate assets held for sale, net 6,383 $ 0
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets of properties held and used 0  
Assets of properties held-for-sale 0  
Assets 0  
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets of properties held and used 1,000  
Assets of properties held-for-sale 4,782  
Assets 5,782  
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets of properties held and used 22,339  
Assets of properties held-for-sale 0  
Assets 22,339  
An additional property included in real estate held-for-sale, net    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Real estate assets held for sale, net $ 1,600