Supplemental Disclosures of Cash Flow Data (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Non-cash transactions:
Establishment of funds withheld liability in connection with a reinsurance transaction	$ (6,000)	$ 0
Net increase (decrease) in fixed maturity AFS securities and accrued investment income in connection with reinsurance activity	$ (193,000)	$ 286,000