STATUTORY REQUIREMENTS - Schedule Of Assets Held Under Trust And Minimum (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Statutory Accounting Practices [Line Items]
Assets held in trust	$ 8,600,000	$ 10,300,000
Multi-Beneficiary Reinsurance Trust \| RREAG
Statutory Accounting Practices [Line Items]
Assets held in trust	1,395,468	1,463,275
Multi-Beneficiary Reinsurance Trust \| RREAG \| Minimum
Statutory Accounting Practices [Line Items]
Assets held in trust	1,184,741	1,312,796
Multi-Beneficiary Reinsurance Trust \| Renaissance Reinsurance
Statutory Accounting Practices [Line Items]
Assets held in trust	581,595	954,114
Multi-Beneficiary Reinsurance Trust \| Renaissance Reinsurance \| Minimum
Statutory Accounting Practices [Line Items]
Assets held in trust	413,673	554,119
Multi-Beneficiary Reinsurance Trust \| DaVinci Reinsurance
Statutory Accounting Practices [Line Items]
Assets held in trust	60,634	179,849
Multi-Beneficiary Reinsurance Trust \| DaVinci Reinsurance \| Minimum
Statutory Accounting Practices [Line Items]
Assets held in trust	$ 32,421	$ 47,179

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-5

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-3

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

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