Stock-Based Compensation - Additional Information (Detail) $ in Millions	1 Months Ended						6 Months Ended
	Jun. 30, 2024 shares	Jun. 30, 2023 shares	Jun. 30, 2022 shares	Jun. 30, 2021 shares	Jun. 30, 2020 shares	Jun. 30, 2019 shares	Jun. 30, 2024 USD ($) Period shares	Dec. 31, 2023 shares
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, option to be granted at percentage of fair value of common stock							85.00%
Employee Stock Purchase Plan, offering period							12 months
Number of purchase periods within each offering period | Period							2
Increase in shares of common stock authorized for issuance	2,000,000.0				1,500,000
Aggregate number of shares of common stock reserved for future issuance	600,000						600,000
2008 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, option to be granted at percentage of fair value of common stock							100.00%
Increase in shares of common stock authorized for issuance		7,000,000	12,000,000	7,600,000	5,000,000	11,800,000
Stock-based compensation, award term							10 years
Performance-based stock options, outstanding	2,600,000						2,600,000
Outstanding options and other stock based awards	12,789,000						12,789,000	14,515,000
Number of additional awards granted	0						0
2008 Equity Incentive Plan | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, vesting period							4 years
2008 Equity Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unvested Restricted Stock Units	13,712,000						13,712,000	10,686,000
2008 Equity Incentive Plan | Performance-based Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Purchase Plan, authorized shares for issuance	500,000						500,000
2008 Equity Incentive Plan | Performance-based Cash Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option plan granted on cash award | $							$ 1.0
2008 Equity Incentive Plan | Minimum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, vesting period							3 years
2008 Equity Incentive Plan | Maximum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, vesting period							4 years
2024 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares of common stock reserved for future issuance	26,500,000						26,500,000
Outstanding options and other stock based awards	12,800,000						12,800,000
Number of shares available for future issuance	12,500,000						12,500,000
Number of additional shares available for grant and issurance	5,000,000						5,000,000
2024 Equity Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unvested Restricted Stock Units	13,700,000						13,700,000