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Reinsurance - Schedule of Total Assets and Maximum Exposure Loss (Details) $ in Thousands	Sep. 30, 2025 USD ($)
VIE
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	$ (12,250)
Maximum Exposure to Loss, Off - Balance Sheet	164
Maximum Exposure to Loss, Total	(12,086)
VIE | Radnor Re 2021-1 Ltd.
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	(5,637)
Maximum Exposure to Loss, Off - Balance Sheet	7
Maximum Exposure to Loss, Total	(5,630)
VIE | Radnor Re 2021-2 Ltd.
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	(6,301)
Maximum Exposure to Loss, Off - Balance Sheet	32
Maximum Exposure to Loss, Total	(6,269)
VIE | Radnor Re 2022-1 Ltd.
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	(403)
Maximum Exposure to Loss, Off - Balance Sheet	23
Maximum Exposure to Loss, Total	(380)
VIE | Radnor Re 2023-1 Ltd.
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	56
Maximum Exposure to Loss, Off - Balance Sheet	40
Maximum Exposure to Loss, Total	96
VIE | Radnor Re 2024-1 Ltd.
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	35
Maximum Exposure to Loss, Off - Balance Sheet	62
Maximum Exposure to Loss, Total	97
Radnor Re 2021-1 Ltd. | Reinsurance Policy, Type [Axis]: Vintage Year Aug 2020 - Mar 2021
Variable Interest Entity [Line Items]
Total VIE Assets	114,739
Radnor Re 2021-2 Ltd. | Reinsurance Policy, Type [Axis]: Vintage Year Apr 2021 - Sep 2021
Variable Interest Entity [Line Items]
Total VIE Assets	209,214
Radnor Re 2022-1 Ltd. | Reinsurance Policy, Type [Axis]: Vintage Year Oct 2021 - Jul 2022
Variable Interest Entity [Line Items]
Total VIE Assets	140,407
Radnor Re 2023-1 Ltd. | Reinsurance Policy, Type [Axis]: Vintage Year August 2022- June 2023
Variable Interest Entity [Line Items]
Total VIE Assets	227,315
Radnor Re 2024-1 Ltd. | Reinsurance Policy, Type [Axis]: Vintage Year July 2023- July 2024
Variable Interest Entity [Line Items]
Total VIE Assets	$ 282,240

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