Investments, Securities with Continuous Unrealized Loss Position (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) Securities	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) Securities
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	$ 102,473		$ 33,467
12 months or longer	10,019		4,761
Total	112,492		38,228
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	4,350		465
12 months or longer	1,293		252
Total	5,643		$ 717
Gross OTTI losses charged to realized gains	$ 0	$ 0
Number of securities in unrealized loss position | Securities	141		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	$ 33,399		$ 30,141
12 months or longer	5,041		0
Total	38,440		30,141
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	1,555		416
12 months or longer	543		0
Total	2,098		416
Obligations of States and Political Subdivisions [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	3,394
12 months or longer	0
Total	3,394
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	63
12 months or longer	0
Total	63
Corporate Securities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	65,680		3,326
12 months or longer	4,978		4,761
Total	70,658		8,087
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	2,732		49
12 months or longer	750		252
Total	$ 3,482		$ 301