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LONG-TERM DEBT - Extinguishment and Modification of Previously Existing Credit Agreement (Details) - Original Term Loan Agreement - Secured Debt $ in Millions | 12 Months Ended |
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Dec. 31, 2020 USD ($) | Dec. 23, 2020 USD ($) rate
Debt Instrument [Line Items] |  |
Deferred financing costs |  | $ 3.0
Original issue discount |  | $ 4.1
Write-off of debt issuance costs and third-party fees | $ 5.4 |
Discounted cash flow |  |
Debt Instrument [Line Items] |  |
Debt measurement input | rate |  | 0.10

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