STOCKHOLDERS' EQUITY - Assumptions Used in Fair Value Determination (Details)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Options
Weighted Average Assumptions [Abstract]
Expected Volatility	26.90%	24.00%	26.80%
Expected Term (in years)	3 years 10 months 24 days	4 years	4 years 4 months 24 days
Risk-Free Interest Rate	1.30%	2.50%	2.60%
Dividend Yield	0.50%	0.60%	0.60%
Vesting period	3 years
Performance Shares \| Employee
Weighted Average Assumptions [Abstract]
Expected Volatility	24.00%	24.00%	27.00%
Risk-Free Interest Rate	1.40%	2.50%	2.40%
Dividend Yield	0.50%	0.50%	0.50%
Initial total shareholder return percentage	10.90%	(5.90%)	(10.50%)
Cliff vesting percentage	100.00%
Vesting period	3 years
Restricted Stock \| Employee \| Minimum
Weighted Average Assumptions [Abstract]
Vesting period	3 years
Restricted Stock \| Employee \| Maximum
Weighted Average Assumptions [Abstract]
Vesting period	4 years
Restricted Stock \| Non-employee Director \| Minimum
Weighted Average Assumptions [Abstract]
Vesting period	3 years
Restricted Stock \| Non-employee Director \| Maximum
Weighted Average Assumptions [Abstract]
Vesting period	4 years

The initial percentage of total shareholder return.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Percentage of vesting of award under share-based payment arrangement.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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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 (f)(2)(i)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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