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RETIREMENT BENEFIT PLAN (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Contribution Plan Disclosure [Line Items]
Employer contribution amount	$ 3.9	$ 3.8	$ 5.5
Tranche One
Defined Contribution Plan Disclosure [Line Items]
Percentage of employer matching	100.00%
Defined contribution plan automatic enrollment percent	3.00%
Tranche Two
Defined Contribution Plan Disclosure [Line Items]
Percentage of employer matching	50.00%
Defined contribution plan automatic enrollment percent	2.00%

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- Definition

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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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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- Definition

Percentage employer matches of the employee's percentage contribution matched.

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