Annual report pursuant to Section 13 and 15(d)

Orion Office REIT, Fair Value Measures - Narrative (Details)

v3.22.1
Orion Office REIT, Fair Value Measures - Narrative (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
property
Dec. 31, 2020
USD ($)
property
Dec. 31, 2019
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Number of properties | property 10 1  
Provisions for impairment | $ $ 49,859,000 $ 18,671,000 $ 0
Weighted Average | Assets Impaired During The Twelve Months Ended December 31 2021 | Discount Rate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Alternative investment, measurement input 0.089