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Investments Equity Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity securities | $ 11,590 | $ 14,844
Equity Funds [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity securities | 2,615 | 3,571
Bond Mutual Funds [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity securities | 4,337 | 5,060
Common Stock [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity securities | 857 | 990
Nonredeemable Preferred Stock [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity securities | 8 | 161
Nonredeemable Preferred Stock Fund |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity securities | $ 3,773 | $ 5,062

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