| Orion Office REIT, Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | Nov. 12, 2021 | Nov. 10, 2021 | Jul. 15, 2021 | 
|---|---|---|---|
| Class of Stock [Line Items] | |||
| Issuance of common stock, net (in shares) | 56,525,650 | 100,000 | |
| Proceeds from issuance of common stock | $ 1 | ||
| Warrants to purchase (in shares) | 1,120,000 | ||
| Warrant, exercise price (in dollars per share) | $ 22.42 | ||
| Maximum | |||
| Class of Stock [Line Items] | |||
| Warrants expire term | 10 years | ||
| Minimum | |||
| Class of Stock [Line Items] | |||
| Warrants expire term | 7 years | ||
| Realty Income | |||
| Class of Stock [Line Items] | |||
| Common stock, shares owned by realty income (in shares) | 56,625,650 | 
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- Definition Class Of Warrant Or Right, Term No definition available. 
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- Definition Number Of Shares Owned By Related Party No definition available. 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition The cash inflow from the additional capital contribution to the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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