Annual report pursuant to Section 13 and 15(d)

Orion Office REIT, Fair Value Measures - Fair Value of Financial Instruments (Details)

v3.22.4
Orion Office REIT, Fair Value Measures - Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt $ 530,000 $ 620,000
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 507,323 620,000
Level 2 | Bridge facility | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 0 355,000
Level 2 | Bridge facility | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 0 355,000
Level 2 | Mortgages payable | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 355,000 0
Level 2 | Mortgages payable | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 332,323 0
Level 2 | Credit facility term loan | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 175,000 175,000
Level 2 | Credit facility term loan | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 175,000 175,000
Level 2 | Credit facility revolver    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Line of credit facility, amount outstanding 425,000  
Level 2 | Credit facility revolver | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 0 90,000
Level 2 | Credit facility revolver | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt $ 0 $ 90,000