Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Investment Company, Financial Highlights [Line Items]
Revenues	$ 63,474	$ 61,731	$ 62,084	$ 57,712	$ 66,849	$ 59,390	$ 58,527	$ 55,914	$ 245,001	$ 240,680
Benefits and expenses	59,758	58,694	58,782	52,787	58,075	54,749	52,483	49,199	230,021	214,506
Federal income tax expense (benefit)	95	247	(657)	383	(1,967)	1,943	(82)	1,843	68	1,737
Net income (loss)	3,621	2,790	3,959	4,542	10,741	2,698	6,126	4,872	$ 14,912	$ 24,437
Common Stock [Member]
Investment Company, Financial Highlights [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 3,621	$ 2,790	$ 3,959	$ 4,542	$ 10,741	$ 2,698	$ 6,126	$ 4,872
Common Stock Class A [Member]
Investment Company, Financial Highlights [Line Items]
Earnings Per Share, Basic	$ 0.07	$ 0.06	$ 0.08	$ 0.09	$ 0.21	$ 0.06	$ 0.12	$ 0.10	$ 0.30	$ 0.49
Earnings Per Share, Diluted	$ 0.07	$ 0.05	$ 0.08	$ 0.09	$ 0.21	$ 0.05	$ 0.12	$ 0.10	$ 0.29	$ 0.48