Investments, Securities with Continuous Unrealized Loss Position (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) Securities	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Securities	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) Securities
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	$ 170,273		$ 170,273		$ 33,467
12 months or longer	19,981		19,981		4,761
Total	190,254		190,254		38,228
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	28,168		28,168		465
12 months or longer	4,620		4,620		252
Total	32,788		32,788		$ 717
Gross OTTI losses charged to realized gains	$ 0	$ 0	$ 0	$ 0
Number of securities in unrealized loss position | Securities	235		235		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	$ 28,463		$ 28,463		$ 30,141
12 months or longer	14,606		14,606		0
Total	43,069		43,069		30,141
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	3,153		3,153		416
12 months or longer	2,797		2,797		0
Total	5,950		5,950		416
Obligations of States and Political Subdivisions [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	7,124		7,124
12 months or longer	0		0
Total	7,124		7,124
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	1,749		1,749
12 months or longer	0		0
Total	1,749		1,749
Corporate Securities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	134,686		134,686		3,326
12 months or longer	5,375		5,375		4,761
Total	140,061		140,061		8,087
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	23,266		23,266		49
12 months or longer	1,823		1,823		252
Total	$ 25,089		$ 25,089		$ 301