Investments, Securities with Continuous Unrealized Loss Position (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) Securities	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Securities	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) Securities
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	$ 23,399		$ 23,399		$ 29,783
12 months or longer	0		0		6,037
Total	23,399		23,399		35,820
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	1,506		1,506		220
12 months or longer	0		0		127
Total	1,506		1,506		$ 347
Gross OTTI losses charged to realized gains	$ 0	$ 0	$ 0	$ 0
Number of securities in unrealized loss position | Securities	17		17		30
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	$ 887		$ 887		$ 3,432
12 months or longer	0		0		3,533
Total	887		887		6,965
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	25		25		22
12 months or longer	0		0		31
Total	25		25		53
Obligations of States and Political Subdivisions [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months					3,106
12 months or longer					0
Total					3,106
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months					53
12 months or longer					0
Total					53
Corporate Securities [Member]
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract]
Less than 12 months	22,512		22,512		23,245
12 months or longer	0		0		2,504
Total	22,512		22,512		25,749
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	1,481		1,481		145
12 months or longer	0		0		96
Total	$ 1,481		$ 1,481		$ 241