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

Fair Value Measures - Schedule of Assets Measured at Fair Value on a Non-recurring Basis (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets of properties held and used	$ 5,402
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets of properties held and used	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets of properties held and used	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets of properties held and used	$ 5,402