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Subsequent Events - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Jan. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Subsequent Event [Line Items]        
Gain loss on sale of properties   $ 1,074 $ 432 $ 1,049
Subsequent Event        
Subsequent Event [Line Items]        
Net sales price of properties $ 7,400      
Gain loss on sale of properties $ 0