Securities (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($)
Schedule Of Marketable Securities [Line Items]
Proceeds from sales of securities available for sale	$ 64,600	$ 37,000
Investments held having OTTI losses	$ 0	0
Number of securities with unrealized losses | security	66
Investment grade corporate obligations comprise securities with unrealized losses | security	6
Securities with amortized costs	$ 47,300	56,000
Securities purchased from single issuer other than U.S. Treasury issue and other U.S. Government agencies	$ 0	$ 0
Minimum percentage of securities purchased from U.S. Treasury issue and other U.S. Government agencies	10.00%	10.00%
U.S. Treasury Issue and Other U.S. Gov't Agencies [Member]
Schedule Of Marketable Securities [Line Items]
Securities with investment grade | security	59
Corporate Debt Securities [Member]
Schedule Of Marketable Securities [Line Items]
Investment grade corporate obligations comprise securities with unrealized losses | security	1
Federal Reserve Bank Advances [Member]
Schedule Of Marketable Securities [Line Items]
Debt Instrument, Collateral Amount	$ 5,800	$ 7,000
Debt Instrument, Lendable Collateral Value	$ 5,700