Quarterly report pursuant to Section 13 or 15(d)

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

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Real Estate Dispositions, Held for Sale and Impairment Charges - Additional Information (Detail) - property
9 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Real Estate Properties [Line Items]    
Number of properties sold 1  
Number of impaired assets, held and used 0  
Maitland, Florida    
Real Estate Properties [Line Items]    
Number of real estate properties, held for sale   1
Disposed of by sale    
Real Estate Properties [Line Items]    
Number of properties sold 1