Annual report pursuant to Section 13 and 15(d)

Real Estate Dispositions, Held for Sale, and Impairment Charges - Components of Operating Income from Real Estate and Related Assets Disposed (Details)

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Real Estate Dispositions, Held for Sale, and Impairment Charges - Components of Operating Income from Real Estate and Related Assets Disposed (Details)
3 Months Ended 12 Months Ended
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
property
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Real Estate Properties [Line Items]        
Impairment charge     $ 0  
Loss on sale of real estate, net   $ 10,052,000 (1,148,000) $ 8,096,000
Parsippany, New Jersey        
Real Estate Properties [Line Items]        
Impairment charge $ 1,400,000      
Assets disposed of by sale        
Real Estate Properties [Line Items]        
Operating revenue   5,732,000 5,211,000 6,494,000
Operating expense   3,740,000 4,412,000 4,015,000
Other income (expense), net   9,766,000 (244,000) (740,000)
Income from real estate and related assets sold   11,758,000 $ 555,000 $ 1,739,000
Loss on sale of real estate, net   $ 10,052,000    
Number of non-core properties sold | property   5