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Equity-Based Compensation - Stock Option Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Options outstanding, Beginning balance 1,510,306 1,360,068  
Options granted 282,320 507,600  
Options exercised (352,297) (68,700)  
Options cancelled (34,725) (288,662)  
Options outstanding, Ending balance 1,405,604 1,510,306 1,360,068
Options exercisable, Ending balance 524,509 596,606  
Options outstanding, Weighted Average Exercise Price, Beginning balance $ 37.56 $ 39.40  
Options granted, Weighted Average Exercise Price 57.14 33.13  
Options exercised, Weighted Average Exercise Price 36.16 29.15  
Options cancelled, Weighted Average Exercise Price 37.44 39.67  
Options outstanding, Weighted Average Exercise Price, Ending balance 41.85 37.56 $ 39.40
Options exercisable, Weighted Average Exercise Price, Ending balance $ 44.58 $ 45.37  
Options outstanding, Weighted Average Remaining Contractual Term 7 years 10 months 17 days 7 years 4 months 6 days 7 years 6 months 25 days
Options granted, Weighted Average Remaining Contractual Term 10 years 3 days 9 years 2 months 4 days  
Options exercisable, Weighted Average Remaining Contractual Term, Ending balance 6 years 1 month 2 days 5 years 6 months 18 days  
Options outstanding, Aggregate Intrinsic Value $ 19,300 $ 1,414 $ 1,650
Options granted, Aggregate Intrinsic Value   157  
Options exercised, Aggregate Intrinsic Value 7,300 854  
Options exercisable, Aggregate Intrinsic Value, Ending balance $ 6,183 $ 543