SHARE-BASED COMPENSATION - Stock Option Activity (Detail) - $ / shares shares in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Option Shares
Beginning Balance	3,706	5,330	7,304
Granted	59	0	67
Canceled	(82)	(40)	(167)
Exercised	(638)	(1,584)	(1,874)
Ending Balance	3,045	3,706	5,330
Weighted-Average Exercise Price Per Share
Beginning Balance	$ 29.65	$ 28.54	$ 28.03
Granted	35.75	0.00	44.59
Canceled	26.31	27.28	32.11
Exercised	27.82	25.97	26.78
Ending Balance	$ 30.25	$ 29.65	$ 28.54

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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

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