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RETIREMENT BENEFIT PLAN (Details) - USD ($) $ in Millions | 12 Months Ended
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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. + References No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Details
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