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Equity-based Compensation - Equity-Based Compensation Expense - Additional Information (Detail) - 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]
Stock-based compensation expense	$ 66,018	$ 49,524	$ 39,260
Total unrecognized compensation expense related to stock options	132,500
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation expense	$ 45,700
Unrecognized compensation expense, remaining weighted-average period for recognition	2 years 1 month 6 days
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense, remaining weighted-average period for recognition	2 years 9 months 18 days

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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