STOCK-BASED COMPENSATION - Summary of RSU Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended
Sep. 30, 2022 USD ($) $ / shares shares
Shares (in thousands)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	4,490,000
Restricted stock units
Shares (in thousands)
Unvested — Beginning balance (in shares)	2,294,000
Granted (in shares)	4,260,000
Vested (in shares)	(681,000)
Forfeited (in shares)	(786,000)
Unvested — Ending balance (in shares)	5,087,000
Weighted-Average Grant Date Fair Value
Unvested — Beginning balance (in usd per share) \| $ / shares	$ 60.58
Granted (in usd per share) \| $ / shares	31.81
Vested (in usd per share) \| $ / shares	53.13
Forfeited (in usd per share) \| $ / shares	67.52
Unvested — Ending balance (in usd per share) \| $ / shares	$ 36.41
Unvested, weighted-average remaining contractual term	3 years 10 days
Unvested, unamortized compensation costs \| $	$ 138,807

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Amount of noncash expense for option under share-based payment arrangement.

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