Fair Value Measurements (Schedule of assets, which are measured on a recurring basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Total fixed income securities	$ 364,651	$ 320,410
Total equity securities	77,690	69,952
Cash equivalents	45,741	65,354
Total assets at fair value	488,082	455,716
Fair Value, Inputs, Level 1 [Member]
Total fixed income securities
Total equity securities	77,690	69,952
Cash equivalents	45,741	65,354
Total assets at fair value	123,431	135,306
Fair Value, Inputs, Level 2 [Member]
Total fixed income securities	364,651	320,410
Total equity securities
Cash equivalents
Total assets at fair value	364,651	320,410
Fair Value, Inputs, Level 3 [Member]
Total fixed income securities
Total equity securities
Cash equivalents
Total assets at fair value
U.S. Government and agencies [Member]
Total fixed income securities	13,498	14,383
U.S. Government and agencies [Member] | Fair Value, Inputs, Level 1 [Member]
Total fixed income securities
U.S. Government and agencies [Member] | Fair Value, Inputs, Level 2 [Member]
Total fixed income securities	13,498	14,383
U.S. Government and agencies [Member] | Fair Value, Inputs, Level 3 [Member]
Total fixed income securities
States, territories and possessions and political subdivisions [Member]
Total fixed income securities	87,294	64,244
States, territories and possessions and political subdivisions [Member] | Fair Value, Inputs, Level 1 [Member]
Total fixed income securities
States, territories and possessions and political subdivisions [Member] | Fair Value, Inputs, Level 2 [Member]
Total fixed income securities	87,294	64,244
States, territories and possessions and political subdivisions [Member] | Fair Value, Inputs, Level 3 [Member]
Total fixed income securities
Corporate securities [Member]
Total fixed income securities	147,621	126,030
Corporate securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total fixed income securities
Corporate securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total fixed income securities	147,621	126,030
Corporate securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total fixed income securities
Residential mortgage-backed securities [Member]
Total fixed income securities	26,156	36,494
Residential mortgage-backed securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total fixed income securities
Residential mortgage-backed securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total fixed income securities	26,156	36,494
Residential mortgage-backed securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total fixed income securities
Commercial mortgage-backed securities [Member]
Total fixed income securities	33,532	25,655
Commercial mortgage-backed securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total fixed income securities
Commercial mortgage-backed securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total fixed income securities	33,532	25,655
Commercial mortgage-backed securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total fixed income securities
Asset-backed securities [Member]
Total fixed income securities	52,422	51,200
Asset-backed securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total fixed income securities
Asset-backed securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total fixed income securities	52,422	51,200
Asset-backed securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total fixed income securities
Redeemable Preferred Stock [Member]
Total fixed income securities	4,128	2,404
Redeemable Preferred Stock [Member] | Fair Value, Inputs, Level 1 [Member]
Total fixed income securities
Redeemable Preferred Stock [Member] | Fair Value, Inputs, Level 2 [Member]
Total fixed income securities	4,128	2,404
Redeemable Preferred Stock [Member] | Fair Value, Inputs, Level 3 [Member]
Total fixed income securities
Basic materials [Member]
Total equity securities	653	1,285
Basic materials [Member] | Fair Value, Inputs, Level 1 [Member]
Total equity securities	653	1,285
Basic materials [Member] | Fair Value, Inputs, Level 2 [Member]
Total equity securities
Basic materials [Member] | Fair Value, Inputs, Level 3 [Member]
Total equity securities
Communications [Member]
Total equity securities	4,379	7,455
Communications [Member] | Fair Value, Inputs, Level 1 [Member]
Total equity securities	4,379	7,455
Communications [Member] | Fair Value, Inputs, Level 2 [Member]
Total equity securities
Communications [Member] | Fair Value, Inputs, Level 3 [Member]
Total equity securities
Consumer, cyclical [Member]
Total equity securities	12,685	9,929
Consumer, cyclical [Member] | Fair Value, Inputs, Level 1 [Member]
Total equity securities	12,685	9,929
Consumer, cyclical [Member] | Fair Value, Inputs, Level 2 [Member]
Total equity securities
Consumer, cyclical [Member] | Fair Value, Inputs, Level 3 [Member]
Total equity securities
Consumer, non-cyclical [Member]
Total equity securities	16,075	14,633
Consumer, non-cyclical [Member] | Fair Value, Inputs, Level 1 [Member]
Total equity securities	16,075	14,633
Consumer, non-cyclical [Member] | Fair Value, Inputs, Level 2 [Member]
Total equity securities
Consumer, non-cyclical [Member] | Fair Value, Inputs, Level 3 [Member]
Total equity securities
Energy [Member]
Total equity securities	2,477	1,499
Energy [Member] | Fair Value, Inputs, Level 1 [Member]
Total equity securities	2,477	1,499
Energy [Member] | Fair Value, Inputs, Level 2 [Member]
Total equity securities
Energy [Member] | Fair Value, Inputs, Level 3 [Member]
Total equity securities
Financial [Member]
Total equity securities	4,694	6,235
Financial [Member] | Fair Value, Inputs, Level 1 [Member]
Total equity securities	4,694	6,235
Financial [Member] | Fair Value, Inputs, Level 2 [Member]
Total equity securities
Financial [Member] | Fair Value, Inputs, Level 3 [Member]
Total equity securities
Industrial [Member]
Total equity securities	16,658	12,733
Industrial [Member] | Fair Value, Inputs, Level 1 [Member]
Total equity securities	16,658	12,733
Industrial [Member] | Fair Value, Inputs, Level 2 [Member]
Total equity securities
Industrial [Member] | Fair Value, Inputs, Level 3 [Member]
Total equity securities
Technology [Member]
Total equity securities	17,522	16,145
Technology [Member] | Fair Value, Inputs, Level 1 [Member]
Total equity securities	17,522	16,145
Technology [Member] | Fair Value, Inputs, Level 2 [Member]
Total equity securities
Technology [Member] | Fair Value, Inputs, Level 3 [Member]
Total equity securities
Perpetual preferred stocks [Member]
Total equity securities	2,547
Perpetual preferred stocks [Member] | Fair Value, Inputs, Level 1 [Member]
Total equity securities	2,547
Perpetual preferred stocks [Member] | Fair Value, Inputs, Level 2 [Member]
Total equity securities
Perpetual preferred stocks [Member] | Fair Value, Inputs, Level 3 [Member]
Total equity securities
Utility [Member]
Total equity securities		38
Utility [Member] | Fair Value, Inputs, Level 1 [Member]
Total equity securities		38
Utility [Member] | Fair Value, Inputs, Level 2 [Member]
Total equity securities
Utility [Member] | Fair Value, Inputs, Level 3 [Member]
Total equity securities