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Capital Stock - Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Class of Stock [Line Items]      
Common stock shares issued (in shares) 100,259,182 100,259,182 96,241,596
Common stock shares outstanding (in shares) 100,259,182 100,259,182 96,241,596
Shares Converted From Class B to Class A      
Class of Stock [Line Items]      
Conversion of stock, shares converted (in shares) 13,630,921 45,404,934  
Common Class A      
Class of Stock [Line Items]      
Common stock shares issued (in shares) 70,394,686 70,394,686  
Common stock shares outstanding (in shares) 70,394,686 70,394,686  
Common Class B      
Class of Stock [Line Items]      
Common stock shares issued (in shares) 29,864,496 29,864,496  
Common stock shares outstanding (in shares) 29,864,496 29,864,496