Investments, Securities with Continuous Unrealized Loss Position (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($) Securities	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) Securities	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) Securities
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	$ 18,486		$ 18,486		$ 6,878
12 months or longer	177,600		177,600		183,695
Total	196,086		196,086		190,573
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	702		702		53
12 months or longer	24,769		24,769		21,638
Total	$ 25,471		$ 25,471		$ 21,691
Number of securities in unrealized loss position | Securities	225		225		222
Allowance for expected credit losses on available-for-sale fixed maturities	$ 0		$ 0		$ 0
Realized investment gains	13	$ 70	13	$ 70
U.S. Treasury Securities and Obligations of U.S. Government Agencies and Authorities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	2,807		2,807		5,194
12 months or longer	37,897		37,897		39,476
Total	40,704		40,704		44,670
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	41		41		37
12 months or longer	4,814		4,814		4,907
Total	4,855		4,855		4,944
Allowance for expected credit losses on available-for-sale fixed maturities	0		0		0
Obligations of States and Political Subdivisions [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	0		0		1,145
12 months or longer	6,699		6,699		5,936
Total	6,699		6,699		7,081
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	0		0		3
12 months or longer	1,426		1,426		1,421
Total	1,426		1,426		1,424
Allowance for expected credit losses on available-for-sale fixed maturities	0		0		0
Corporate Securities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	15,679		15,679		539
12 months or longer	133,004		133,004		138,283
Total	148,683		148,683		138,822
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	661		661		13
12 months or longer	18,529		18,529		15,310
Total	19,190		19,190		15,323
Allowance for expected credit losses on available-for-sale fixed maturities	$ 0		$ 0		$ 0