Loans (Summary Of Activity In Allowance For Loan And Lease Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Troubled Debt Restructurings during prior 12 months that subsequently defaulted [Table Text Block]	March 31, 2018
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for (recoveries of) loan losses	$ (263)	$ 1,983
Acquired Nonimpaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	383	0
Charge-offs	(3)	0
Ending balance	380	0
Period-end amount allocated to:
Ending balance	383	0	$ 380	$ 0
Total loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	19,659	18,685
Charge-offs	(1,000)	(2,299)
Recoveries	2,010	321
Net (charge-offs ) recoveries	1,010	(1,978)
Provision for (recoveries of) loan losses	(263)	1,983
Ending balance	20,406	18,690
Period-end amount allocated to:
Loans individually evaluated for impairment			915	356
Loans collectively evaluated for impairment			19,491	18,334
Ending balance	19,659	18,685	20,406	18,690
Commercial real estate, other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	8,003	7,797
Charge-offs	(110)	(842)
Recoveries	10	15
Net (charge-offs ) recoveries	(100)	(827)
Provision for (recoveries of) loan losses	394	1,092
Ending balance	8,297	8,062
Period-end amount allocated to:
Loans individually evaluated for impairment			476	1
Loans collectively evaluated for impairment			7,821	8,061
Ending balance	8,003	7,797	8,297	8,062
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	6,178	5,813
Charge-offs	(63)	(31)
Recoveries	1,784	0
Net (charge-offs ) recoveries	1,721	(31)
Provision for (recoveries of) loan losses	(1,156)	(513)
Ending balance	6,743	5,269
Period-end amount allocated to:
Loans individually evaluated for impairment			266	224
Loans collectively evaluated for impairment			6,477	5,045
Ending balance	6,178	5,813	6,743	5,269
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	1,214	904
Charge-offs	(109)	(145)
Recoveries	31	26
Net (charge-offs ) recoveries	(78)	(119)
Provision for (recoveries of) loan losses	77	301
Ending balance	1,213	1,086
Period-end amount allocated to:
Loans individually evaluated for impairment			57	57
Loans collectively evaluated for impairment			1,156	1,029
Ending balance	1,214	904	1,213	1,086
Home equity lines of credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	618	693
Charge-offs	(9)	(37)
Recoveries	1	7
Net (charge-offs ) recoveries	(8)	(30)
Provision for (recoveries of) loan losses	(2)	27
Ending balance	608	690
Period-end amount allocated to:
Loans individually evaluated for impairment			71	15
Loans collectively evaluated for impairment			537	675
Ending balance	618	693	608	690
Consumer, indirect
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	3,214	2,944
Charge-offs	(473)	(929)
Recoveries	115	134
Net (charge-offs ) recoveries	(358)	(795)
Provision for (recoveries of) loan losses	277	885
Ending balance	3,133	3,034
Period-end amount allocated to:
Loans individually evaluated for impairment			15	20
Loans collectively evaluated for impairment			3,118	3,014
Ending balance	3,214	2,944	3,133	3,034
Consumer, direct
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	351	464
Charge-offs	(63)	(110)
Recoveries	13	69
Net (charge-offs ) recoveries	(50)	(41)
Provision for (recoveries of) loan losses	50	50
Ending balance	351	473
Period-end amount allocated to:
Loans individually evaluated for impairment			30	39
Loans collectively evaluated for impairment			321	434
Ending balance	351	464	351	473
Deposit account overdrafts
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	81	70
Charge-offs	(173)	(205)
Recoveries	56	70
Net (charge-offs ) recoveries	(117)	(135)
Provision for (recoveries of) loan losses	97	141
Ending balance	61	76
Period-end amount allocated to:
Loans individually evaluated for impairment			0	0
Loans collectively evaluated for impairment			61	76
Ending balance	$ 81	$ 70	$ 61	$ 76