Available for Sale Securities (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($) security
Available for Sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security	14	79
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | security	18	6
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Total | $	$ 0	$ 0
Security Owned and Pledged as Collateral, Fair Value, Total | $	$ 999	$ 960