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Organization (Details)
$ in Thousands, ft² in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
ft²
building
property
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Aug. 31, 2021
USD ($)
Segment Reporting Information [Line Items]        
Cash and cash equivalents $ 2,800,998 $ 2,987,225 $ 2,795,642  
General and administrative 37,444 $ 33,233 $ 38,442  
Monmouth Real Estate Investment Corporation        
Segment Reporting Information [Line Items]        
Business acquisition, transaction costs       $ 10,000
General and administrative $ 100      
EQC Operating Trust        
Segment Reporting Information [Line Items]        
Noncontrolling interest, ownership percentage by parent 99.79%      
Consolidated portfolio        
Segment Reporting Information [Line Items]        
Number of properties | property 4      
Number of buildings | building 8      
Property square feet (in sqft) | ft² 1.5