v3.19.3.a.u2
Subsequent Events - Summary of Earnout Tranches, Applicable VWAP of REIT Share and AFFO Per Share, and Applicable Earnout Periods (Detail) - Merger Agreement - USD ($)
 12 Months Ended
Feb. 28, 2020
Dec. 31, 2019
Subsequent Event    
Subsequent Event [Line Items]    
Earnout Tranche $ 75,000,000  
Tranche One | Subsequent Event    
Subsequent Event [Line Items]    
Earnout Tranche $ 10,000,000  
Tranche One | If the Company has completed an IPO    
Subsequent Event [Line Items]    
Applicable Earnout Period   The two-year period beginning on the earlier of (i) the IPO closing date or (ii) December 31, 2020.
Tranche One | If the Company has completed an IPO | Subsequent Event    
Subsequent Event [Line Items]    
VWAP of a REIT Share $ 90.00  
Tranche One | If the Company has not completed an IPO    
Subsequent Event [Line Items]    
Applicable Earnout Period   The two-year period consisting of the calendar years ended December 31, 2020 and December 31, 2021.
Tranche One | If the Company has not completed an IPO | Subsequent Event    
Subsequent Event [Line Items]    
AFFO per Share $ 5.85  
Tranche Two | Subsequent Event    
Subsequent Event [Line Items]    
Earnout Tranche $ 15,000,000  
Tranche Two | If the Company has completed an IPO    
Subsequent Event [Line Items]    
Applicable Earnout Period   The two-year period beginning on the earlier of (i) the IPO closing date or (ii) December 31, 2020.
Tranche Two | If the Company has completed an IPO | Subsequent Event    
Subsequent Event [Line Items]    
VWAP of a REIT Share $ 95.00  
Tranche Two | If the Company has not completed an IPO    
Subsequent Event [Line Items]    
Applicable Earnout Period   The two-year period consisting of the calendar years ended December 31, 2020 and December 31, 2021.
Tranche Two | If the Company has not completed an IPO | Subsequent Event    
Subsequent Event [Line Items]    
AFFO per Share $ 5.95  
Tranche Three | Subsequent Event    
Subsequent Event [Line Items]    
Earnout Tranche $ 25,000,000  
Tranche Three | If the Company has completed an IPO    
Subsequent Event [Line Items]    
Applicable Earnout Period   The four-year period beginning on the date that is exactly one year after the earnout period begins for the first and second tranches above.
Tranche Three | If the Company has completed an IPO | Subsequent Event    
Subsequent Event [Line Items]    
VWAP of a REIT Share $ 97.50  
Tranche Three | If the Company has not completed an IPO    
Subsequent Event [Line Items]    
Applicable Earnout Period   The four-year period consisting of the calendar years ended December 31, 2021, December 31, 2022, December 31, 2023 and December 31, 2024.
Tranche Three | If the Company has not completed an IPO | Subsequent Event    
Subsequent Event [Line Items]    
AFFO per Share $ 6.30  
Tranche Four | Subsequent Event    
Subsequent Event [Line Items]    
Earnout Tranche $ 25,000,000  
Tranche Four | If the Company has completed an IPO    
Subsequent Event [Line Items]    
Applicable Earnout Period   The four-year period beginning on the date that is exactly one year after the earnout period begins for the first and second tranches above.
Tranche Four | If the Company has completed an IPO | Subsequent Event    
Subsequent Event [Line Items]    
VWAP of a REIT Share $ 100.00  
Tranche Four | If the Company has not completed an IPO    
Subsequent Event [Line Items]    
Applicable Earnout Period   The four-year period consisting of the calendar years ended December 31, 2021, December 31, 2022, December 31, 2023 and December 31, 2024.
Tranche Four | If the Company has not completed an IPO | Subsequent Event    
Subsequent Event [Line Items]    
AFFO per Share $ 6.70