Derivatives (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) agreement	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Derivative [Line Items]
Notional Amount	$ 37,800
Cash collateral	1,300	$ 251
Fair value of outstanding derivatives	$ (232)
Interest Rate Swap [Member]
Derivative [Line Items]
Number of interest rate swap agreements | agreement	6
Fair value adjustment on derivatives, gain	$ 1,900	647	$ 1,800
Receivable under agreements	$ 232
Payable under agreements		$ 1,700