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SHARE-BASED COMPENSATION PLANS - Summary of outstanding and exercisable stock options (Details)	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number of Options Outstanding | shares	1,125,383
Options Outstanding, Weighted Average Remaining Contractual Life (in Years)	5 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 25.62
Options Exercisable, Number Of Options Exercisable | shares	640,012
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 26.77
$18.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, Lower Range Limit (in dollars per share)	$ 18.00
Options Outstanding, Number of Options Outstanding | shares	188,600
Options Outstanding, Weighted Average Remaining Contractual Life (in Years)	9 years 8 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 18.00
Exercise Price Range From $23.38 to $25.86 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, Lower Range Limit (in dollars per share)	23.38
Exercise Prices, Upper Range Limit (in dollars per share)	$ 25.86
Options Outstanding, Number of Options Outstanding | shares	623,050
Options Outstanding, Weighted Average Remaining Contractual Life (in Years)	3 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 24.93
Options Exercisable, Number Of Options Exercisable | shares	477,884
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 25.40
Exercise Price Range From $27.04 to $37.22 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, Lower Range Limit (in dollars per share)	27.04
Exercise Prices, Upper Range Limit (in dollars per share)	$ 37.22
Options Outstanding, Number of Options Outstanding | shares	313,733
Options Outstanding, Weighted Average Remaining Contractual Life (in Years)	7 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 31.55
Options Exercisable, Number Of Options Exercisable | shares	162,128
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 30.80

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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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No definition available.

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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-Publisher FASB
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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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