Investments, Securities with Continuous Unrealized Loss Position (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) Securities	Dec. 31, 2021 USD ($) Securities
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	$ 159,874	$ 33,467
12 months or longer	33,773	4,761
Total	193,647	38,228
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]
Less than 12 months	20,326	465
12 months or longer	8,464	252
Total	28,790	717
Gross OTTI losses charged to realized gains	$ 0	$ 0
Number of securities in unrealized loss position | Securities	237	61
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	$ 23,763	$ 30,141
12 months or longer	19,259	0
Total	43,022	30,141
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]
Less than 12 months	2,410	416
12 months or longer	3,516	0
Total	5,926	416
Obligations of States and Political Subdivisions [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	8,183
12 months or longer	0
Total	8,183
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]
Less than 12 months	1,702
12 months or longer	0
Total	1,702
Corporate Securities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	127,928	3,326
12 months or longer	14,514	4,761
Total	142,442	8,087
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract]
Less than 12 months	16,214	49
12 months or longer	4,948	252
Total	$ 21,162	$ 301