Loans (Schedule of the Activity Regarding TDRs by Loan Type) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	$ 28,623
Additions	3,871
Charge-offs	(65)
Net (paydowns) advances	(3,716)
Transfer into OREO	0
Refinance out of TDR status	(350)
Troubled debt restructurings, ending balance	28,363
Allowance related to troubled debt restructurings	1,027
Land And Land Improvements [Member]
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	3,337
Additions	438
Charge-offs	0
Net (paydowns) advances	(732)
Transfer into OREO	0
Refinance out of TDR status	0
Troubled debt restructurings, ending balance	3,043
Allowance related to troubled debt restructurings	453
Construction [Member]
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	0
Additions	0
Charge-offs	0
Net (paydowns) advances	0
Transfer into OREO	0
Refinance out of TDR status	0
Troubled debt restructurings, ending balance	0
Allowance related to troubled debt restructurings	0
Commercial Loan [Member]
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	711
Additions	0
Charge-offs	0
Net (paydowns) advances	(299)
Transfer into OREO	0
Refinance out of TDR status	0
Troubled debt restructurings, ending balance	412
Allowance related to troubled debt restructurings	252
Owner Occupied [Member]
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	7,384
Additions	2,302
Charge-offs	0
Net (paydowns) advances	(141)
Transfer into OREO	0
Refinance out of TDR status	0
Troubled debt restructurings, ending balance	9,545
Allowance related to troubled debt restructurings	125
Non Owner Occupied [Member]
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	6,714
Additions	489
Charge-offs	(65)
Net (paydowns) advances	(1,904)
Transfer into OREO	0
Refinance out of TDR status	0
Troubled debt restructurings, ending balance	5,234
Allowance related to troubled debt restructurings	25
Non Jumbo [Member]
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	5,417
Additions	642
Charge-offs	0
Net (paydowns) advances	(514)
Transfer into OREO	0
Refinance out of TDR status	(350)
Troubled debt restructurings, ending balance	5,195
Allowance related to troubled debt restructurings	158
Jumbo [Member]
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	4,493
Additions	0
Charge-offs	0
Net (paydowns) advances	(100)
Transfer into OREO	0
Refinance out of TDR status	0
Troubled debt restructurings, ending balance	4,393
Allowance related to troubled debt restructurings	14
Home Equity Line of Credit [Member]
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	523
Additions	0
Charge-offs	0
Net (paydowns) advances	0
Transfer into OREO	0
Refinance out of TDR status	0
Troubled debt restructurings, ending balance	523
Allowance related to troubled debt restructurings	0
Mortgage Warehouse Lines [Member]
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	0
Additions	0
Charge-offs	0
Net (paydowns) advances	0
Transfer into OREO	0
Refinance out of TDR status	0
Troubled debt restructurings, ending balance	0
Allowance related to troubled debt restructurings	0
Consumer Portfolio Segment [Member]
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	44
Additions	0
Charge-offs	0
Net (paydowns) advances	(26)
Transfer into OREO	0
Refinance out of TDR status	0
Troubled debt restructurings, ending balance	18
Allowance related to troubled debt restructurings	0
Other Loans [Member]
Troubled Debt Restructurings [Roll Forward]
Troubled debt restructurings, beginning balance	0
Additions	0
Charge-offs	0
Net (paydowns) advances	0
Transfer into OREO	0
Refinance out of TDR status	0
Troubled debt restructurings, ending balance	0
Allowance related to troubled debt restructurings	$ 0