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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 |  |

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