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Equity-Based Compensation and Equity - Schedule Of Weighted Average Assumptions (Detail) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Common Series C Units [Member]      
Grant date fair value $ 201.25 $ 37.90 $ 167.40
Dividend yield 0.00% 0.00% 0.00%
Expected volatility 75.30% 41.20% 36.00%
Risk-free interest rate 0.20% 2.50% 2.30%
Lack of marketability discount 30.50% 31.30% 29.20%
Expected term (years) 1 year 1 year 1 year
Common Series C2 Units [Member]      
Grant date fair value $ 223.00 $ 284.00 $ 652.99
Dividend yield 0.00% 0.00% 0.00%
Yield Test Probability 23.30% 39.00% 97.10%
Cost of Equity Capital 11.80% 11.10% 12.30%
Expected term (years) 1 month 2 months 3 months