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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2020
Significant Accounting Policies [Line Items]        
Threshold ownership percentage for inter company balances and transactions elimination 100.00%      
Expected lease-up periods for estimating lost rentals, in months 6 months      
Percentage of ordinary taxable income to be distributed for real estate investment trust qualification 90.00% 90.00% 90.00%  
Number of years of federal income tax at corporate rates on failure to qualify as REIT 4 years      
Offsetting lease liability $ 76,353,000      
ASU 2016-02 [Member]        
Significant Accounting Policies [Line Items]        
Operating lease right-of-use asset 84,000,000      
Offsetting lease liability $ 84,000,000      
Minimum [Member] | ASU 2016-13 [Member] | Subsequent Event [Member]        
Significant Accounting Policies [Line Items]        
Credit loss reserve expected       $ 5,000
Maximum [Member] | ASU 2016-13 [Member] | Subsequent Event [Member]        
Significant Accounting Policies [Line Items]        
Credit loss reserve expected       $ 15,000
Time-Based Awards [Member]        
Significant Accounting Policies [Line Items]        
Stock award service period in years 3 years      
Market Conditions Based Awards [Member] | Minimum [Member]        
Significant Accounting Policies [Line Items]        
Stock award service period in years 3 years      
Market Conditions Based Awards [Member] | Maximum [Member]        
Significant Accounting Policies [Line Items]        
Stock award service period in years 5 years