Loans (Summary Of Average Impaired Loans And Related Interest Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	$ 21,600	$ 17,225
Impaired Loans, With No Related Allowance, Total Interest Income	292	159
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	14	14
Impaired Loans, With A Related Allowance, Average Recorded Investment	530	2,038
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	22,130	19,263
Impaired Loans, Total, Total Interest Income	292	159
Impaired Loans, Total, Cash Basis Interest Income	14	14
Total Commercial Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	20,650	16,553
Impaired Loans, With No Related Allowance, Total Interest Income	285	157
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	7	12
Impaired Loans, With A Related Allowance, Average Recorded Investment	530	2,038
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	21,180	18,591
Impaired Loans, Total, Total Interest Income	285	157
Impaired Loans, Total, Cash Basis Interest Income	7	12
Total Consumer Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	950	672
Impaired Loans, With No Related Allowance, Total Interest Income	7	2
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	7	2
Impaired Loans, With A Related Allowance, Average Recorded Investment	0	0
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	950	672
Impaired Loans, Total, Total Interest Income	7	2
Impaired Loans, Total, Cash Basis Interest Income	7	2
Builder & Developer [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	2,486	3,284
Impaired Loans, With No Related Allowance, Total Interest Income	6	54
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, With A Related Allowance, Average Recorded Investment	0	384
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	2,486	3,668
Impaired Loans, Total, Total Interest Income	6	54
Impaired Loans, Total, Cash Basis Interest Income	0	0
Commercial Real Estate Investor [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	4,552	5,328
Impaired Loans, With No Related Allowance, Total Interest Income	60	63
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	4	7
Impaired Loans, With A Related Allowance, Average Recorded Investment	530	0
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	5,082	5,328
Impaired Loans, Total, Total Interest Income	60	63
Impaired Loans, Total, Cash Basis Interest Income	4	7
Residential Real Estate Investor [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	1,366	1,402
Impaired Loans, With No Related Allowance, Total Interest Income	12	14
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	3	5
Impaired Loans, With A Related Allowance, Average Recorded Investment	0	460
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	1,366	1,862
Impaired Loans, Total, Total Interest Income	12	14
Impaired Loans, Total, Cash Basis Interest Income	3	5
Hotel/Motel [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	0	180
Impaired Loans, With No Related Allowance, Total Interest Income	0	0
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, With A Related Allowance, Average Recorded Investment	0	18
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	0	198
Impaired Loans, Total, Total Interest Income	0	0
Impaired Loans, Total, Cash Basis Interest Income	0	0
Wholesale & Retail [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	7,092	3,768
Impaired Loans, With No Related Allowance, Total Interest Income	100	3
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, With A Related Allowance, Average Recorded Investment	0	0
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	7,092	3,768
Impaired Loans, Total, Total Interest Income	100	3
Impaired Loans, Total, Cash Basis Interest Income	0	0
Manufacturing [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	3,752	1,281
Impaired Loans, With No Related Allowance, Total Interest Income	91	9
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, With A Related Allowance, Average Recorded Investment	0	637
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	3,752	1,918
Impaired Loans, Total, Total Interest Income	91	9
Impaired Loans, Total, Cash Basis Interest Income	0	0
Agriculture [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	378	284
Impaired Loans, With No Related Allowance, Total Interest Income	1	0
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, With A Related Allowance, Average Recorded Investment	0	356
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	378	640
Impaired Loans, Total, Total Interest Income	1	0
Impaired Loans, Total, Cash Basis Interest Income	0	0
Residential Mortgages [Member] | Total Consumer Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	261	117
Impaired Loans, With No Related Allowance, Total Interest Income	0	0
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, With A Related Allowance, Average Recorded Investment	0	0
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	261	117
Impaired Loans, Total, Total Interest Income	0	0
Impaired Loans, Total, Cash Basis Interest Income	0	0
Home Equity [Member] | Total Consumer Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	454	320
Impaired Loans, With No Related Allowance, Total Interest Income	2	1
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	2	1
Impaired Loans, With A Related Allowance, Average Recorded Investment	0	0
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	454	320
Impaired Loans, Total, Total Interest Income	2	1
Impaired Loans, Total, Cash Basis Interest Income	2	1
Other [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	1,024	1,026
Impaired Loans, With No Related Allowance, Total Interest Income	15	14
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, With A Related Allowance, Average Recorded Investment	0	183
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	1,024	1,209
Impaired Loans, Total, Total Interest Income	15	14
Impaired Loans, Total, Cash Basis Interest Income	0	0
Other [Member] | Total Consumer Related Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans, With No Related Allowance, Average Recorded Investment	235	235
Impaired Loans, With No Related Allowance, Total Interest Income	5	1
Impaired Loans, With No Related Allowance, Cash Basis Interest Income	5	1
Impaired Loans, With A Related Allowance, Average Recorded Investment	0	0
Impaired Loans, With A Related Allowance, Total Interest Income	0	0
Impaired Loans, With A Related Allowance, Cash Basis Interest Income	0	0
Impaired Loans, Total, Average Recorded Investment	235	235
Impaired Loans, Total, Total Interest Income	5	1
Impaired Loans, Total, Cash Basis Interest Income	$ 5	$ 1