SHARE-BASED AWARDS - RESTRICTED STOCK UNIT ACTIVITY (Details) - Restricted Stock Units shares in Thousands	12 Months Ended
Dec. 31, 2021 $ / shares shares
Non-vested restricted stock unit activity
Outstanding, beginning of period (in shares)	792
Granted (in shares)	239
Vested (in shares)	(509)
Cancelled (in shares)	(3)
Added by performance factor (in shares)	172
Outstanding, end of period (in shares)	691
Weighted Average Grant-Date Fair Value
Outstanding, weighted average grant-date fair value, beginning of period (in dollars per share) \| $ / shares	$ 35.14
Granted, weighted average grant-date fair value (in dollars per share) \| $ / shares	68.41
Vested, weighted average grant-date fair value (in dollars per share) \| $ / shares	32.54
Cancelled, weighted average grant-date fair value (in dollars per shares) \| $ / shares	44.27
Added by performance factor , weighted average grant-date fair value (in dollars per share) \| $ / shares	31.48
Outstanding, weighted average grant-date fair value, end of period (in dollars per shares) \| $ / shares	$ 47.61
2007 Plan
Non-vested restricted stock unit activity
Outstanding, beginning of period (in shares)	3
Vested (in shares)	(2)
Outstanding, end of period (in shares)	1
2016 Plan
Non-vested restricted stock unit activity
Outstanding, beginning of period (in shares)	789
Granted (in shares)	239
Vested (in shares)	(507)
Cancelled (in shares)	(3)
Added by performance factor (in shares)	172
Outstanding, end of period (in shares)	690

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).

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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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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.

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

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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