SHARE-BASED COMPENSATION - Stock Option Activity (Detail) - $ / shares shares in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock Option Shares
Beginning Balance	7,304	12,680	15,836
Granted	67	626	1,328
Canceled	(167)	(236)	(362)
Exercised	(1,874)	(5,766)	(4,122)
Ending Balance	5,330	7,304	12,680
Weighted-Average Exercise Price Per Share
Beginning Balance	$ 28.03	$ 26.28	$ 25.47
Granted	44.59	35.80	30.70
Canceled	32.11	24.95	27.82
Exercised	26.78	30.11	24.46
Ending Balance	$ 28.54	$ 28.03	$ 26.28

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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