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, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reinsurance:
Unpaid losses and loss adjustment expense		$ 151,874
Total	$ 875,034		$ 890,254
Property and Casualty Insurance [Member]
Reinsurance:
Unpaid losses and loss adjustment expense		151,874		$ 159,162	$ 177,963	$ 209,127
Operating Segments [Member] | Property and Casualty Insurance [Member]
Reinsurance:
Unpaid losses and loss adjustment expense		151,874		159,162
Reinsurance losses payable		1,133		1,217
Total	$ 153,007	$ 153,007	$ 160,379	$ 160,379