Quarterly report pursuant to Section 13 or 15(d)

Real Estate Dispositions, Held for Sale and Impairment Charges - Additional Information (Detail)

v3.21.2
Real Estate Dispositions, Held for Sale and Impairment Charges - Additional Information (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
property
Sep. 30, 2020
USD ($)
tenant
Sep. 30, 2021
USD ($)
property
Sep. 30, 2020
USD ($)
tenant
Dec. 31, 2020
property
Real Estate Properties [Line Items]          
Number of real estate properties, held for sale 1   1    
Impairment charge | $     $ 0    
Impairment charge | $ $ 0 $ 1,184,000 $ 0 $ 2,905,000  
Boston Heights, Ohio; Rancho Cordova, California; Champaign, Illinois          
Real Estate Properties [Line Items]          
Number of real estate properties, held for sale         3
Rancho Cordova, California and Champaign, Illinois          
Real Estate Properties [Line Items]          
Number of properties sold 2   2    
Blaine, Minnesota          
Real Estate Properties [Line Items]          
Number of properties impaired | tenant   3   3