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Summary of Company's Stock Option Activity (Detail) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) $ / shares shares
Number of Shares |
Options Outstanding, Beginning Balance | shares | 17,427,228
Granted | shares | 1,937,006
Exercised | shares | (2,571,633)
Cancelled/forfeited | shares | (350,607)
Options Outstanding, Ending Balance | shares | 16,441,994
Vested at December 31, 2020 | shares | 9,691,855
Unvested at December 31, 2020 | shares | 6,750,139
Exercisable | shares | 9,691,855
Weighted Average Exercise Prices |
Weighted Average Exercise Prices, Beginning Balance | $ / shares | $ 28.69
Weighted Average Exercise Prices, granted | $ / shares | 43.78
Weighted Average Exercise Prices, exercised | $ / shares | 28.71
Weighted Average Exercise Prices, Cancelled/forfeited | $ / shares | 31.75
Weighted Average Exercise Prices, Ending Balance | $ / shares | 30.40
Weighted Average Exercise Prices, Vested | $ / shares | 29.71
Weighted Average Exercise Prices, Unvested | $ / shares | 31.38
Weighted Average Exercise Prices, Exercisable | $ / shares | $ 29.71
Weighted average remaining contractual term, Outstanding | 6 years 9 months 18 days
Weighted average remaining contractual term, Vested | 6 years
Weighted average remaining contractual term, Unvested | 8 years
Weighted average remaining contractual term, Exercisable | 6 years
Aggregate Intrinsic Value, Outstanding | $ | $ 379,233
Aggregate Intrinsic Value, Vested | $ | 230,156
Aggregate Intrinsic Value, Unvested | $ | 149,078
Aggregate Intrinsic Value, Exercisable | $ | $ 230,156

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