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BENEFIT PLANS - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Maximum percentage of employees income available for contribution |  |  | 100.00% |
Employer contribution expense | $ 1,900,000 | $ 800,000 | $ 3,900,000 | $ 1,300,000
Dover Downs Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Minimum required pension contributions | 0 |  | 0 |
Contributions to plan | 0 | $ 200,000 | 0 | $ 200,000
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year | $ 0 |  | $ 0 |

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