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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 USD ($) shares | Jun. 30, 2024 USD ($) | Jun. 30, 2025 USD ($) segment shares | Jun. 30, 2024 USD ($) | Dec. 31, 2024 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of reportable segment | segment |  |  | 1 |  |
Deferred policy acquisition cost | $ 38.7 |  | $ 38.7 |  | $ 29.3
Deferred policy acquisition costs, amortization expense | $ 18.3 | $ 9.1 | $ 29.7 | $ 15.7 |
Performance-based Restricted Stock Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted (in shares) | shares | 0.2 |  | 0.2 |  |
Performance-based Restricted Stock Units | Tranche 1 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 1 year |  |  |  |
Performance-based Restricted Stock Units | Tranche 2 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 2 years |  |  |  |
Performance-based Restricted Stock Units | Tranche 3 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 3 years |  |  |  |
Performance-based Restricted Stock Units | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity Instruments other than options, percentage | 0.00% |  |  |  |
Performance-based Restricted Stock Units | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation arrangement by share-based payment award, equity Instruments other than options, percentage | 200.00% |  |  |  |

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