Orion Office REIT Inc. Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.2.2

Orion Office REIT, Fair Value Measures - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) property	Sep. 30, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of properties \| property			10
Impairments	$ 44,801,000	$ 0	$ 54,161,000	$ 0
Impairment, Long-Lived Asset, Held-for-Use			44,000,000
Impairment of properties held for sale			1,600,000
Impairment of properties disposed of			$ 8,600,000
Assets Impaired During The Nine Months Ended September 30 2022 \| Estimated Sales Price
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of properties \| property			8
Assets Impaired During The Nine Months Ended September 30 2022 \| Discount Rate and Capitalization Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of properties \| property			2
Assets Impaired During The Nine Months Ended September 30 2022 \| Weighted Average \| Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Alternative investment, measurement input	0.085		0.085
Assets Impaired During The Nine Months Ended September 30 2022 \| Weighted Average \| Capitalization Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Alternative investment, measurement input	0.080		0.080

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