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RESERVE FOR LOSSES AND LOSS EXPENSES - Prior Year Development (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Prior years - net favorable (adverse) effect | $ 8,012 | $ 2,762 | $ 8,011 | $ 13,118
Insurance |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Prior years - net favorable (adverse) effect | 4,009 | 1,609 | 4,008 | 5,433
Reinsurance |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Prior years - net favorable (adverse) effect | $ 4,003 | $ 1,153 | $ 4,003 | $ 7,685

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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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