Reinsurance - Summary of Total Assets and Maximum Exposure Loss (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Radnor Re 2021-1 Ltd. | Reinsurance Policy, Type [Axis]: Vintage Year Aug 2020 - Mar 2021
Variable Interest Entity [Line Items]
Total VIE Assets	$ 220,532
Radnor Re 2021-2 Ltd. | Reinsurance Policy, Type [Axis]: Vintage Year Apr 2021 - Sep 2021
Variable Interest Entity [Line Items]
Total VIE Assets	286,439
Radnor Re 2022-1 Ltd. | Reinsurance Policy, Type [Axis]: Vintage Year Oct 2021 - Jul 2022
Variable Interest Entity [Line Items]
Total VIE Assets	191,938
Radnor Re 2024-1 Ltd. | Reinsurance Policy, Type [Axis]: Vintage July 2023- July 2024
Variable Interest Entity [Line Items]
Total VIE Assets	363,366
Radnor Re, Total
Variable Interest Entity [Line Items]
Total VIE Assets	1,343,737
VIE
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	(11,417)
Maximum Exposure to Loss, Off - Balance Sheet	294
Maximum Exposure to Loss, Total	(11,123)
VIE | Radnor Re 2021-1 Ltd.
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	(5,407)
Maximum Exposure to Loss, Off - Balance Sheet	28
Maximum Exposure to Loss, Total	(5,379)
VIE | Radnor Re 2021-2 Ltd.
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	(5,911)
Maximum Exposure to Loss, Off - Balance Sheet	56
Maximum Exposure to Loss, Total	(5,855)
VIE | Radnor Re 2022-1 Ltd.
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	(210)
Maximum Exposure to Loss, Off - Balance Sheet	37
Maximum Exposure to Loss, Total	(173)
VIE | Radnor Re 2023-1 Ltd.
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	111
Maximum Exposure to Loss, Off - Balance Sheet	73
Maximum Exposure to Loss, Total	184
VIE | Radnor Re 2024-1 Ltd.
Variable Interest Entity [Line Items]
Maximum Exposure to Loss, On - Balance Sheet	0
Maximum Exposure to Loss, Off - Balance Sheet	100
Maximum Exposure to Loss, Total	$ 100