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LONG-TERM DEBT - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Mar. 31, 2019
2018 Term Loan A | Notes Payable |  |
Debt Instrument [Line Items] |  |
New term loan |  | $ 425,000,000
2018 Term Loan A | Notes Payable | LIBOR |  |
Debt Instrument [Line Items] |  |
Spread on variable rate | 1.625% |
2018 Term Loan A | Notes Payable | Prime lending rate |  |
Debt Instrument [Line Items] |  |
Spread on variable rate | 0.625% |
2018 Revolver | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Revolving credit facility amount | $ 250,000,000 |
Letters of credit outstanding | 16,000,000 |
Revolving credit facility remaining capacity | 234,000,000 |
2018 Revolver | Swingline loan | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Revolving credit facility amount | $ 20,000,000 |

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