STOCK-BASED AWARDS - Stock Option Activity (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares
Stock Options Outstanding, Shares
Shares outstanding, beginning of period (in shares) \| shares	2,851
Exercised (in shares) \| shares	(774)
Forfeited (in shares) \| shares	(174)
Shares outstanding, period end (in shares) \| shares	1,903	2,851
Stock Options Outstanding, Weighted Average Exercise Price
Weighted-average exercise price, outstanding at beginning of period (USD per share)	$ 30.97
Weighted average exercise price, exercised (USD per share)	12.09
Weighted average exercise price, forfeited (USD per share)	42.43
Weighted-average exercise price, outstanding at end of period (USD per share)	$ 37.62	$ 30.97
Stock Options, Additional Disclosures
Weighted-average remaining contractual term, outstanding	2 years 10 months 24 days	3 years 1 month 6 days
Aggregate intrinsic value, outstanding \| $	$ 9,347	$ 78,580
Exercisable at end of period (in shares) \| shares	1,903
Weighted average exercise price, exercisable at end of period (USD per share)	$ 37.62
Weighted-average remaining contractual term, exercisable	2 years 10 months 24 days
Aggregate intrinsic value, exercisable at end of period \| $	$ 9,347
Stock Options Vested and Expected to Vest
Vested and expected to vest at end of period (in shares) \| shares	1,903
Weighted average exercise price, vested and expected to vest at end of period (USD per share)	$ 37.62
Weighted-average remaining contractual term, vested and expected to vest	2 years 10 months 24 days
Aggregate intrinsic value, vested and expected to vest at end of period \| $	$ 9,347
Closing stock price (USD per share)	$ 36.36	$ 58.55

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. 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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Number of fully vested and expected to vest exercisable options that may 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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Price of a single share of a number of saleable stocks of a company.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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