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STOCK-BASED COMPENSATION - Valuation Assumptions and Other Information (Details) - Stock options - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Option valuation assumptions for options granted
Weighted average expected volatility for options granted (as a percent)	45.72%	40.87%	30.13%
Weighted average risk free rate (as a percent)	0.93%	0.48%	1.83%
Weighted average grant date fair value per share of options granted (in dollars per share)	$ 26.37	$ 17.33	$ 12.19
Total fair value of shares vested	$ 5,389	$ 3,852	$ 2,407
Total intrinsic value of options exercised	16,028	15,258	5,932
Cash received for all stock option exercises	10,435	7,813	4,060
Tax benefit realized from stock awards exercised	$ 3,366	$ 3,204	$ 1,246
Directors
Option valuation assumptions for options granted
Expected life	3 years 10 months 24 days	3 years 3 months 3 days	3 years 14 days
Executives
Option valuation assumptions for options granted
Expected life	5 years 4 months 17 days	5 years 2 months 19 days	5 years 25 days
Employees
Option valuation assumptions for options granted
Expected life	4 years 2 months 12 days	4 years 1 month 17 days	4 years 2 months 4 days

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Amount of tax benefit from exercise of option under share-based payment arrangement.

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The cash inflow associated with the amount received from the stock plan during the period.

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

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Rate of weighted-average expected volatility for award under share-based payment arrangement.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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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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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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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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