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Investments (Schedule of aggregate fair value and gross unrealized loss) (Details) - Fixed income securities [Member] - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months Fair Value | $ 128,694 | $ 12,908
Less than 12 months Gross Unrealized Losses | (2,197) | (191)
Greater than 12 months Fair Value | 4,762 | 4,922
Greater than 12 months Gross Unrealized Losses | (102) | (105)
Fair Value, Total | 133,456 | 17,830
Gross Unrealized Losses, Total | (2,299) | (296)
U.S. Government and agencies [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months Fair Value | 3,125 | 931
Less than 12 months Gross Unrealized Losses | (87) | (6)
Greater than 12 months Fair Value |  |
Greater than 12 months Gross Unrealized Losses |  |
Fair Value, Total | 3,125 | 931
Gross Unrealized Losses, Total | (87) | (6)
States, territories and possessions and political subdivisions [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months Fair Value | 19,769 | 1,806
Less than 12 months Gross Unrealized Losses | (350) | (35)
Greater than 12 months Fair Value | 222 |
Greater than 12 months Gross Unrealized Losses | (3) |
Fair Value, Total | 19,991 | 1,806
Gross Unrealized Losses, Total | (353) | (35)
Corporate securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months Fair Value | 46,816 | 3,215
Less than 12 months Gross Unrealized Losses | (1,015) | (97)
Greater than 12 months Fair Value | 1,895 | 734
Greater than 12 months Gross Unrealized Losses | (54) | (50)
Fair Value, Total | 48,711 | 3,949
Gross Unrealized Losses, Total | (1,069) | (147)
Residential mortgage-backed securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months Fair Value | 17,407 | 68
Less than 12 months Gross Unrealized Losses | (261) | (1)
Greater than 12 months Fair Value | 1,434 |
Greater than 12 months Gross Unrealized Losses | (39) |
Fair Value, Total | 18,841 | 68
Gross Unrealized Losses, Total | (300) | (1)
Commercial mortgage-backed securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months Fair Value | 11,287 | 1,103
Less than 12 months Gross Unrealized Losses | (160) | (21)
Greater than 12 months Fair Value | 216 |
Greater than 12 months Gross Unrealized Losses | (1) |
Fair Value, Total | 11,503 | 1,103
Gross Unrealized Losses, Total | (161) | (21)
Asset-backed securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months Fair Value | 28,797 | 5,785
Less than 12 months Gross Unrealized Losses | (308) | (31)
Greater than 12 months Fair Value | 995 | 4,188
Greater than 12 months Gross Unrealized Losses | (5) | (55)
Fair Value, Total | 29,792 | 9,973
Gross Unrealized Losses, Total | (313) | $ (86)
Redeemable Preferred Stock [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months Fair Value | 1,493 |
Less than 12 months Gross Unrealized Losses | (16) |
Greater than 12 months Fair Value |  |
Greater than 12 months Gross Unrealized Losses |  |
Fair Value, Total | 1,493 |
Gross Unrealized Losses, Total | $ (16) |

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