Commitments and Off-balance Sheet Items (Summary of Commitments and Contingencies) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Commitment to Sell Loans, Mandatory
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	$ 0	$ 254
Variable Rate	0	0
Commitment to Sell Loans, Non-Mandatory
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	19,406	24,095
Variable Rate	0	1,718
Standby Letters of Credit
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	1,138	3,284
Variable Rate	6,549	5,863
Commitments to Fund Loans:
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	88,601	46,734
Variable Rate	767,580	672,897
Consumer Lines | Commitments to Fund Loans:
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	11,637	11,356
Variable Rate	381,050	343,666
Residential Mortgages | Commitments to Fund Loans:
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	29,654	16,640
Variable Rate	2,017	3,559
Commercial Operating Lines | Commitments to Fund Loans:
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	47,310	18,738
Variable Rate	$ 384,513	$ 325,672