Quarterly report pursuant to Section 13 or 15(d)

Realty Income Office Assets, Segment Information - Assets (Details)

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Realty Income Office Assets, Segment Information - Assets (Details)
$ in Thousands
 9 Months Ended
Sep. 30, 2021
USD ($)
segment
Jul. 15, 2021
USD ($)
Dec. 31, 2020
USD ($)
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets $ 1 $ 1  
Realty Income Office Assets      
Segment Reporting, Asset Reconciling Item [Line Items]      
Number of activity segments | segment 12    
Total real estate investments, net $ 484,904   $ 497,876
Intangible lease assets, net 23,496   28,680
Other assets, net 8,757   11,797
Total assets 524,997   546,431
Realty Income Office Assets | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 484,904   497,876
Intangible lease assets, net 23,496   28,680
Realty Income Office Assets | Corporate, Non-Segment      
Segment Reporting, Asset Reconciling Item [Line Items]      
Other assets, net 16,597   19,875
Realty Income Office Assets | Aerospace | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 14,985   15,406
Intangible lease assets, net 2,192   2,348
Realty Income Office Assets | Diversified Industrial | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 27,815   28,465
Intangible lease assets, net 1,827   2,344
Realty Income Office Assets | Drug Stores | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 70,442   71,787
Realty Income Office Assets | Financial Services | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 54,522   56,077
Intangible lease assets, net 1,693   2,166
Realty Income Office Assets | Food Processing | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 11,718   12,133
Intangible lease assets, net 1,249   1,658
Realty Income Office Assets | General Merchandise | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 19,531   19,999
Intangible lease assets, net 2,957   3,701
Realty Income Office Assets | Government Services | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 92,419   94,960
Intangible lease assets, net 4,531   5,452
Realty Income Office Assets | Health Care | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 73,696   75,795
Intangible lease assets, net 3,388   3,666
Realty Income Office Assets | Insurance | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 4,655   4,844
Intangible lease assets, net 107   199
Realty Income Office Assets | Other Manufacturing | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 20,877   21,337
Intangible lease assets, net 1,669   1,889
Realty Income Office Assets | Telecommunications | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 36,100   37,427
Intangible lease assets, net 1,027   1,794
Realty Income Office Assets | Transportation Services | Operating Segments      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total real estate investments, net 58,144   59,646
Intangible lease assets, net $ 2,856   $ 3,463