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Equity and Stock-based Compensation - Stock Plans - Summary of Stock Option Transactions (Detail)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
$ / shares
shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Outstanding, Beginning Balance, Shares | shares 10,018
Granted, Shares | shares 2,692
Exercised, Shares | shares (3,113)
Expired, Shares | shares (73)
Forfeited, Shares | shares (234)
Outstanding, Ending Balance, Shares | shares 9,290
Vested and expected to vest, Shares | shares 8,929
Exercisable, Shares | shares 5,576
Outstanding, Beginning Balance, Weighted Average Exercise per Share | $ / shares $ 26.63
Granted, Weighted Average Exercise per Share | $ / shares 31.55
Exercised, Weighted Average Exercise per Share | $ / shares 10.73
Expired, Weighted Average Exercise per Share | $ / shares 39.92
Forfeited, Weighted Average Exercise per Share | $ / shares 40.11
Outstanding, Ending Balance, Weighted Average Exercise per Share | $ / shares 32.94
Vested and expected to vest, Weighted Average Exercise per Share | $ / shares 32.76
Exercisable, Weighted Average Exercise per Share | $ / shares $ 29.50
Outstanding, Weighted Average Remaining Contractual Life 6 years 7 months 6 days
Vested and expected to vest, Weighted Average Remaining Contractual Life 6 years 6 months
Exercisable, Weighted Average Remaining Contractual Life 5 years 1 month 6 days
Outstanding, Aggregate Intrinsic Value | $ $ 86,013
Vested and expected to vest, Aggregate Intrinsic Value | $ 84,125
Exercisable, Aggregate Intrinsic Value | $ $ 66,943