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Stock-Based Compensation
 9 Months Ended
Sep. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Stock-Based Compensation
The Company’s 2016 Stock Option and Incentive Plan (the “2016 Plan”) provides for the grant of stock options, restricted stock units (“RSUs”), restricted stock awards, stock appreciation rights, unrestricted stock awards, performance share awards, dividend equivalent rights and cash-based awards by the Company to its employees, directors and consultants. Certain of the Company’s outstanding equity awards were granted under equity incentive plans that are no longer active but continue to govern the outstanding equity awards granted thereunder.
In the first quarter of 2025, the Company granted to certain of its executive employees performance-based restricted stock units (“PSUs”) covering 185,899 shares of Class A common stock that had an aggregate grant date fair value of $27.1 million. The PSUs will vest if certain operational performance or market conditions, as defined in the grant agreements, are met during the performance achievement period, which expires on December 31, 2027. The fair value of the portion of the PSUs with an operational performance target equals the closing price of the Company’s Class A common stock on the date of grant. For this portion, the expense is recognized on a straight-line basis when it is probable that the performance target will be achieved during the performance period. The probability of achievement is assessed each reporting period and cumulative adjustments are recorded in periods in which the probability assessment changes. The fair value of the portion of the PSUs with market conditions was determined using a Monte-Carlo simulation model, and the expense is recognized on a straight-line basis over the performance achievement period. At the end of the vesting period, the number of shares actually issued may range from 0% to 200% of the target based on levels of performance.
The Company’s 2016 Employee Stock Purchase Plan (“ESPP”) allows eligible employees to purchase shares of the Company’s Class A common stock at a discount of 15% through payroll deductions of their eligible compensation. The ESPP provides for separate six-month offering periods beginning in May and November of each year.
As of September 30, 2025, total unrecognized compensation cost related to unvested RSUs was $1.1 billion, which will be amortized over a weighted-average period of 2.3 years. As of September 30, 2025, total unrecognized compensation cost related to unvested stock options and the ESPP was not significant.
Stock-Based Compensation Expense
The Company recorded total stock-based compensation expense as follows:
Three Months Ended
September 30,		Nine Months Ended
September 30,
2025202420252024
(In thousands)
Cost of revenue$4,305 $5,436 $12,663 $16,830 
Research and development86,020 85,047 244,676 249,398 
Sales and marketing36,304 34,000 102,076 102,315 
General and administrative31,540 30,078 87,278 92,281 
Total$158,169 $154,561 $446,693 $460,824