SHARE-BASED COMPENSATION - Schedule of Performance Share Units Activity (Details) - Performance share units - $ / shares shares in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Units
Balance, beginning of year	1,049
Granted	375
Vested	(91)
Forfeited	(20)
Performance adjustment	(215)
Balance, end of year	1,098	1,049
Weighted Average Grant Date Fair Value
Balance, beginning of year	$ 33.93
Granted	33.16	$ 29.66	$ 35.49
Vested	37.93
Forfeited	32.42
Performance adjustment	37.93
Balance, end of year	$ 32.58	$ 33.93

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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- Definition

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.

+ References

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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).

+ References

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- Definition

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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- Definition

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

+ References

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-Publisher FASB
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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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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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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-Publisher FASB
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The number of equity-based payment instruments, excluding stock (or unit) options, that were adjusted for the performance condition 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 adjusted for the performance condition during the reporting period.

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No definition available.

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