Loans and Allowance for Credit Losses (Effect on Loan Loss Provision as a Result of Changes in Methodology) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for credit losses	$ 290	$ 1,500	$ 1,365	$ 2,850
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for credit losses	77	456	127	778
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for credit losses	(73)	1,002	37	1,668
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for credit losses	2	(126)	(197)	295
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for credit losses	398	112	970	140
Construction Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for credit losses			$ 428	$ (31)
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for credit losses	$ (114)	$ 56