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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Business Combination (Details) $ / shares in Units, $ in Thousands | Feb. 07, 2025 USD ($) $ / shares shares | Dec. 31, 2025 shares | Feb. 06, 2025 shares | Dec. 31, 2024 shares
--- | --- | --- | --- | ---
Business Combination[Line Items] |  |  |  |
Common stock outstanding (in shares) |  | 48,524,809 |  | 40,787,007
Queen |  |  |  |
Business Combination[Line Items] |  |  |  |
Per share ratio | 2.45 |  |  |
Equivalent Bally’s common stock to be issued (in shares) | 26,909,895 |  |  |
Bally’s common stock issued to settle Queen’s outstanding warrant and restricted stock awards (in shares) | 3,542,201 |  |  |
Total Bally’s shares issued for Queen shares outstanding | 30,452,096 |  |  |
Share price per Merger Agreement (in dollars per share) | $ / shares | $ 18.25 |  |  |
Total purchase price | $ | $ 555,751 |  |  |
Less: Queen net assets assumed | $ | 217,027 |  |  |
Equity adjustment associated with the Queen merger | $ | $ 338,724 |  |  |
Queen |  |  |  |
Business Combination[Line Items] |  |  |  |
Common stock outstanding (in shares) | 10,967,117 |  | 52,364,192 |

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