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Equity-based Compensation Plans - Summary of Equity-based Compensation Cost Recognized (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Equity-based compensation expense $ 25,536 $ 3,594 $ 824
Total income tax benefit recognized related to equity-based compensation 3,088    
QLH Class B Units      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Equity-based compensation expense 5,556 $ 3,594 $ 824
QLH Restricted Class B-1 Units      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Equity-based compensation expense 90    
Restricted Class A Shares      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Equity-based compensation expense 211    
Restricted Stock Units      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Equity-based compensation expense $ 19,679