Investments Equity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	$ 22,102	$ 16,033
Equity Funds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	3,174	3,274
Bond Mutual Funds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	12,354	12,311
Common Stock [Member]
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	1,143	134
Nonredeemable Preferred Stock [Member]
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	281	314
Nonredeemable Preferred Stock Fund
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	$ 5,150	$ 0