Commitments and Off-balance Sheet Items (Summary of Commitments and Contingencies) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Commitment to Sell Loans, Mandatory
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	$ 254	$ 681
Variable Rate	0	0
Commitment to Sell Loans, Non-Mandatory
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	24,095	24,628
Variable Rate	1,718	188
Standby Letters of Credit
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	3,284	959
Variable Rate	5,863	4,736
Commitments to Fund Loans:
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	46,734	47,519
Variable Rate	672,897	569,970
Consumer Lines | Commitments to Fund Loans:
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	11,356	10,997
Variable Rate	343,666	260,934
Residential Mortgages | Commitments to Fund Loans:
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	16,640	17,255
Variable Rate	3,559	655
Commercial Operating Lines | Commitments to Fund Loans:
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	18,738	19,267
Variable Rate	$ 325,672	$ 308,381