Quarterly report pursuant to Section 13 or 15(d)

Incentive Compensation - Additional Information (Detail)

v3.21.2
Incentive Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2021
Apr. 01, 2021
Oct. 28, 2020
Sep. 30, 2021
Mar. 31, 2021
Sep. 30, 2021
Sep. 30, 2021
Dec. 31, 2020
Replacement RS Us [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share-based compensation expense       $ 9.6 $ 0.0 $ 56.7    
Unrecognized share-based compensation expense             $ 83.6  
Share-based compensation arrangement by share-based payment award, Shares outstanding in period               0
Replacement RS Us [Member] | Amended And Restated Long Term Incentive Plan [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share-based compensation arrangement by share-based payment award, Award vesting rights, Percentage     25.00%          
Replacement RS Us [Member] | Amended And Restated Long Term Incentive Plan [Member] | Maximum [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share-based compensation arrangement by share-based payment award, Award vesting rights, Percentage     75.00%          
Earnout Rights RS Us [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share-based compensation expense       $ 2.4 $ 0.0 $ 4.6    
Unrecognized share-based compensation expense             $ 9.2  
Share-based compensation arrangement by share-based payment award, Shares outstanding in period               0
Earnout Rights RS Us [Member] | Amended And Restated Long Term Incentive Plan [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share-based compensation arrangement by share-based payment award, Fair value assumptions, Expected volatility rate 60.00%              
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 1.14%              
Phantom Share Units (PSUs) [Member] | Long Term Incentive Plan [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share-based compensation arrangement by share-based payment award, Shares outstanding in period 1,077     1,077   1,077 1,077  
Share-based compensation arrangement by share-based payment award, Cash used to settle award   $ 24.0            
Share-based Payment Arrangement, Tranche One [Member] | Common Class A [Member] | Share Price Greater Than Or Equal To Twelve Point Five Zero USD [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share price $ 12.50     $ 12.50   $ 12.50 $ 12.50  
Number of trading days determining common stock share price             20 days  
Number of consecutive trading days determining common stock share price             30 days  
Share-based Payment Arrangement, Tranche One [Member] | Amended And Restated Long Term Incentive Plan [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share-based compensation arrangement by share-based payment award, Award vesting rights, Percentage     25.00%          
Share-based Payment Arrangement, Tranche One [Member] | Earnout Rights RS Us [Member] | Amended And Restated Long Term Incentive Plan [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 1 year 21 days              
Share-based compensation arrangement by share-based payment award,Vesting period             6 years  
Share-based Payment Arrangement, Tranche Two [Member] | Common Class A [Member] | Share Price Greater Than Or Equal To Fifteen USD [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share price $ 15.00     $ 15.00   $ 15.00 $ 15.00  
Number of trading days determining common stock share price             20 days  
Number of consecutive trading days determining common stock share price             30 days  
Share-based Payment Arrangement, Tranche Two [Member] | Amended And Restated Long Term Incentive Plan [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share-based compensation arrangement by share-based payment award, Award vesting rights, Percentage     25.00%          
Share-based Payment Arrangement, Tranche Two [Member] | Earnout Rights RS Us [Member] | Amended And Restated Long Term Incentive Plan [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 1 year 6 months 7 days              
Share-based compensation arrangement by share-based payment award,Vesting period             6 years  
Share-based Payment Arrangement, Tranche Three [Member] | Amended And Restated Long Term Incentive Plan [Member]                
Share-based compensation arrangement by share-based payment award,Vesting period                
Share-based compensation arrangement by share-based payment award, Award vesting rights, Percentage     25.00%