Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Activity in the Liability for Unpaid Losses and Loss Adjustment Expenses for Property and Casualty Insurance) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Balance at January 1					$ 131,187
Less: reinsurance recoverables		$ 42,362
Paid related to:
Plus: reinsurance recoverables		37,864
Property and Casualty Insurance [Member]
Balance at January 1	$ 151,874	151,874	$ 159,162	$ 177,963
Less: reinsurance recoverables	41,329		47,394	64,873
Net balance at January 1	110,545		111,768	113,090
Incurred related to:
Current year	25,396		27,570	28,980
Prior years	(13,153)		(5,828)	(6,290)
Total incurred	12,243		21,742	22,690
Paid related to:
Current year	9,414		10,572	11,040
Prior years	18,369		12,393	12,972
Total paid	27,783		22,965	24,012
Net balance at December 31	95,004		110,545	111,768
Plus: reinsurance recoverables	36,188		41,329	47,394
Adjusted balance, beginning of year April 1, 2021	$ 131,192	$ 131,192	$ 151,874	$ 159,162