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Equity Plans and Stock-Based Compensation - Fair Value-Based Measurements and Weighted-Average Assumptions (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Market-Based Performance Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average fair value (in USD per share)	$ 17.23	$ 18.25	$ 11.62
Risk-free interest rate	4.30%	4.30%	1.70%
Expected life (in years)	2 years 10 months 24 days	2 years 10 months 24 days	2 years 10 months 24 days
Expected volatility	0.60%	0.90%	0.90%
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average fair value (in USD per share)	$ 4.21	$ 5.35	$ 7.37
Risk-free interest rate	4.70%	4.90%	2.10%
Expected life (in years)	1 year 2 months 12 days	1 year 3 months 18 days	1 year 3 months 18 days
Expected volatility	0.40%	0.70%	1.00%
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average fair value (in USD per share)	$ 7.75	$ 7.32	$ 7.95
Risk-free interest rate	4.20%	4.00%	2.00%
Expected life (in years)	4 years 6 months	4 years 6 months	4 years 6 months
Expected volatility	0.80%	0.80%	0.80%

X

- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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