Orion Office REIT Inc. Annual report pursuant to Section 13 and 15(d)

VEREIT Office Assets, Real Estate Investments and Related Intangibles - Impairments (Details) $ in Thousands	10 Months Ended	12 Months Ended
	Oct. 31, 2021 USD ($) property	Dec. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($) property	Dec. 31, 2020 USD ($) property
Real Estate Properties [Line Items]
Number of properties \| property		18	10	1
Provisions for impairment \| $		$ 66,359	$ 49,859	$ 18,671
VEREIT Office Assets
Real Estate Properties [Line Items]
Number of properties \| property	4			2
Provisions for impairment \| $	$ 28,064			$ 9,306
VEREIT Office Assets \| Discount Rate \| Assets impaired during the ten months ended October 31, 2021 \| Weighted Average
Real Estate Properties [Line Items]
Alternative investment, measurement input	0.090
VEREIT Office Assets \| Discount Rate \| Assets Impaired During The Twelve Months Ended December 31 2020 \| Weighted Average
Real Estate Properties [Line Items]
Alternative investment, measurement input				0.089
VEREIT Office Assets \| Capitalization Rate \| Assets impaired during the ten months ended October 31, 2021 \| Weighted Average
Real Estate Properties [Line Items]
Alternative investment, measurement input	0.085
VEREIT Office Assets \| Capitalization Rate \| Assets Impaired During The Twelve Months Ended December 31 2020 \| Weighted Average
Real Estate Properties [Line Items]
Alternative investment, measurement input				0.084