Borrowed Funds (Summary of Short Term Borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Short-term FHLB Advance [Member]
Short-term Debt [Line Items]
Overnight borrowings, interest rate		2.70%
Overnight borrowings		$ 40,000
Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Outstanding at end of year	$ 48,728	$ 37,707
Weighted average interest rate at year end	0.23%	0.24%
Maximum amount outstanding as of any month end	$ 50,345	$ 55,648
Average amount outstanding	$ 39,778	$ 44,045
Approximate weighted average rate during the period	0.28%	0.20%