Investments in Securities and Fair Value Investments in Securities (Schedule of Earnings on Investments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest and dividends	$ 9,055	$ 4,704
Fixed maturity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest and dividends	2,317	1,902
Equity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest and dividends	1,078	1,425
Invested cash and other short-term investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest and dividends	5,659	1,375
Miscellaneous interest
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest and dividends	$ 1	$ 2