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EARNINGS (LOSS) PER SHARE - Narrative (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Stock Options and RSUs
Anti-dilutive shares not included in the computation of diluted earnings per share
Dilutive effect of potential common shares (in shares)			5,221	3,144
Time-based RSUs, Performance-based RSUs and Stock Options
Anti-dilutive shares not included in the computation of diluted earnings per share
Dilutive effect of potential common shares (in shares)	3,103	10,489	3,453	10,604
Performance-Based Restricted Stock Units
Anti-dilutive shares not included in the computation of diluted earnings per share
Excluded from computation of earnings per share, performance conditions not met (in shares)	156		156

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- Definition

Securities Excluded From Computation Of Earnings Per Share, Performance Conditions Not Met, Amount

+ References

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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