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STOCK-BASED COMPENSATION - Outstanding and Exercisable (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Options Outstanding
Total Options (in shares)	1,114,200	1,396,794
Weighted-Average Exercise Price (in dollars per share)	$ 15.86	$ 15.36
Options Exercisable
Total Options (in shares)	822,063
Weighted-Average Exercise Price (in dollars per share)	$ 14.52
Stock options
Options Outstanding
Intrinsic Value (in millions)	$ 28.6
Weighted-Average Remaining Life	4 years 11 months 23 days
Options Exercisable
Intrinsic Value (in millions)	$ 22.2
Weighted-Average Remaining Life	4 years 2 months 1 day

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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

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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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