Reinsurance and Policy Benefits and Losses Claims and Loss Expenses Payable (Policy Benefits and Losses, Claims and Loss Expenses Payable for Property and Casualty Insurance) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reinsurance:
Unpaid losses and loss adjustment expense		$ 159,162
Total	$ 978,254		$ 997,701
Property and Casualty Insurance [Member]
Reinsurance:
Unpaid losses and loss adjustment expense		159,162		$ 177,963	$ 209,127	$ 228,970
Operating Segments [Member] | Property and Casualty Insurance [Member]
Reinsurance:
Unpaid losses and loss adjustment expense		159,162		177,963
Reinsurance losses payable		1,217		979
Total	$ 160,379	$ 160,379	$ 178,942	$ 178,942