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LOSS AND LOSS ADJUSTMENT EXPENSE RESERVES - Schedule of Net Prior Year Reserve Development by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Liability for Claims and Claims Adjustment Expense |  |  |  |
Prior years | $ (3,047) | $ 689 | $ (7,265) | $ (4,712)
Operating Segments |  |  |  |
Liability for Claims and Claims Adjustment Expense |  |  |  |
Prior years |  |  | (5,919) | 109
Operating Segments | Open Market |  |  |  |
Liability for Claims and Claims Adjustment Expense |  |  |  |
Prior years | 941 | (60) | (3,955) | (1,533)
Operating Segments | Innovations |  |  |  |
Liability for Claims and Claims Adjustment Expense |  |  |  |
Prior years | (2,531) | 1,641 | (1,964) | 1,642
Corporate |  |  |  |
Liability for Claims and Claims Adjustment Expense |  |  |  |
Prior years | $ (1,457) | $ (892) | $ (1,346) | $ (4,821)

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- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 + Details
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