Stock-Based Compensation - Summary of The Activity of Restricted Stock And Restricted Stock Units Granted By The Company (Parenthetical) (Detail) - shares	6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Unvested restricted stock	68,217,540		65,208,870
Restricted Stock [Member]
Number of shares available for grant	6,730,505
Number of shares forfeited during period	901,847
Unvested Restricted Stock [Member]
Unvested restricted stock	1,339,124
Restricted Stock Units (RSUs) [Member]
Number of shares available for grant	171,268
Number of shares forfeited during period	58,943
Unvested Class A Restricted Stock [Member]
Unvested restricted stock	47,616,581	47,962,958	44,518,304
Unvested Class B Restricted Stock [Member]
Unvested restricted stock	19,261,835	19,436,835	19,436,835