Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable - (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance recoverable	$ 37,864			$ 42,362
Repwest [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance recoverable	36,200
Property and Casualty Insurance [Member]
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Reinsurance recoverable		$ 36,188	$ 41,329		$ 47,394	$ 64,873
Increase (decrease) in reinsurance recoverable	$ 20,700