Investments Realized Gain (Loss) on Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Gain (Loss) on Securities [Line Items]
Credit valuation loss on fixed maturities AFS	$ 0	$ 0
Proceeds of Investments [Abstract]
Sale of fixed maturities, available-for-sale	29,883,000	33,914,000	$ 8,238,000
Debt Securities, Available-for-sale, Realized Gain	53,000	120,000	189,000
Debt Securities, Available-for-sale, Realized Loss	602,000	112,000	1,000
Sales of equity securities	6,631,000	500,000	7,383,000
Equity Securities, FV-NI, Realized Gain	568,000	44,000	0
Equity Securities, FV-NI, Realized Loss	55,000	0	149,000
Net Realized Investment Gains (Losses) [Abstract]
Gain (Loss) on Sale of Properties	0	0	981,000
Gain (Loss) on Disposition of Property Plant Equipment	0	0	13,000
Proceeds from Sale of Long-term Investments	342,000	2,320,000	1,892,000
Gain (Loss) on Investments	99,000	2,278,000	2,977,000
Unrealized GL in fair value of equity securities	(190,000)	(2,665,000)	376,000
Change in fair value of limited partnerships	912,000	(9,667,000)	7,452,000
Change in credit loss allowance	(61,000)	(237,000)	186,000
Investment related gains (losses), net	760,000	(10,291,000)	10,991,000
Sale of other long-term investments	5,394,000	5,033,000	24,238,000
Gain (Loss) on Sale of Properties	0	0	981,000
Debt Securities [Member]
Net Realized Investment Gains (Losses) [Abstract]
Gain (Loss) on Sales, Calls and Maturities of Fixed Maturities	(756,000)	(104,000)	243,000
Equity Securities [Member]
Net Realized Investment Gains (Losses) [Abstract]
Equity Securities, FV-NI, Realized Gain (Loss)	513,000	62,000	(152,000)
Investment related gains (losses), net	$ (200,000)	$ (2,700,000)	400,000
Other Non-Insurance Enterprises [Member] | Land and Land Improvements
Net Realized Investment Gains (Losses) [Abstract]
Gain (Loss) on Sale of Properties			1,000,000
Sale of other long-term investments			3,800,000
Gain (Loss) on Sale of Properties			$ 1,000,000