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STOCK-BASED COMPENSATION PLANS - Restricted Stock Activity and Incentive Stock Awards Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, beginning of period (in dollars per share)	$ 73.64	$ 75.51	$ 78.76
Granted (in dollars per share)	75.68	70.61	73.76
Vested (in dollars per share)	77.45	71.65	81.55
Adjustment for incentive stock awards expected to vest (in dollars per share)	71.32	78.04	74.62
Canceled (in dollars per share)	72.83	74.04	78.60
Outstanding, end of period (in dollars per share)	$ 73.75	$ 73.64	$ 75.51
Restricted Stock and Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, beginning of period (in shares)	791,031	445,089	399,000
Granted (in shares)	283,587	608,813	224,060
Vested (in shares)	(345,859)	(235,406)	(148,644)
Adjustment for incentive stock awards expected to vest (in shares)	0	0	0
Canceled (in shares)	(83,705)	(27,465)	(29,327)
Outstanding, end of period (in shares)	645,054	791,031	445,089
Incentive Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, beginning of period (in shares)	572,002	415,242	327,333
Granted (in shares)	250,197	259,950	175,100
Vested (in shares)	(147,069)	(119,835)	(93,312)
Adjustment for incentive stock awards expected to vest (in shares)	(331,004)	80,403	32,996
Canceled (in shares)	(73,481)	(63,758)	(26,875)
Outstanding, end of period (in shares)	270,645	572,002	415,242

X

- Definition

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

+ References

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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.

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- Definition

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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- Definition

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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- 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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- Definition

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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Share based compensation arrangement by share based payment award equity instruments other than options net performance adjustment weighted average net performance adjustment fair value.

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Share based compensation arrangement by share based payment award equity instruments other than options nonvested number expected to vest.

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