Investments Equity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	$ 16,033	$ 15,068
Equity Funds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	3,274	2,906
Bond Mutual Funds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	12,311	11,774
Common Stock [Member]
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	134	94
Nonredeemable Preferred Stock [Member]
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	$ 314	$ 294