Loans (Changes In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	$ 3,114,733	$ 2,946,668	$ 3,114,733	$ 2,946,668	$ 3,044,320
Loans, Individually Evaluated for impairment	6,300	4,701	6,300	4,701
Loans, Collectively Evaluated for impairment	3,108,433	2,941,967	3,108,433	2,941,967
Ending balance	31,668	33,955	31,668	33,955
Allowance for loan losses, Individually Evaluated for impairment	1,564	891	1,564	891
Allowance for loan losses, Collectively Evaluated for impairment	30,104	33,064	30,104	33,064
Beginning balance	34,434	33,955	33,914	34,672
Charge-offs	(5,903)	(3,607)	(12,528)	(10,465)
Recoveries	1,293	1,546	4,891	4,698
Provision (credit)	1,844	2,061	5,391	5,050
Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	573,610	537,160	573,610	537,160	557,040
Loans, Individually Evaluated for impairment	3,010	2,338	3,010	2,338
Loans, Collectively Evaluated for impairment	570,600	534,822	570,600	534,822
Ending balance	12,155	14,231	12,155	14,231
Allowance for loan losses, Individually Evaluated for impairment	1,563	431	1,563	431
Allowance for loan losses, Collectively Evaluated for impairment	10,592	13,800	10,592	13,800
Beginning balance	11,717	14,242	14,312	15,668
Charge-offs	(112)	(672)	(380)	(1,113)
Recoveries	102	241	333	438
Provision (credit)	448	420	(2,110)	(762)
Commercial Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	1,037,304	907,107	1,037,304	907,107	960,265
Loans, Individually Evaluated for impairment	3,290	2,363	3,290	2,363
Loans, Collectively Evaluated for impairment	1,034,014	904,744	1,034,014	904,744
Ending balance	5,922	5,422	5,922	5,422
Allowance for loan losses, Individually Evaluated for impairment	1	460	1	460
Allowance for loan losses, Collectively Evaluated for impairment	5,921	4,962	5,921	4,962
Beginning balance	8,790	5,371	5,219	3,696
Charge-offs	(2,994)	(113)	(2,997)	(117)
Recoveries		3	17	11
Provision (credit)	126	161	3,683	1,832
Residential Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	547,839	498,883	547,839	498,883	514,981
Loans, Collectively Evaluated for impairment	547,839	498,883	547,839	498,883
Ending balance	1,183	1,305	1,183	1,305
Allowance for loan losses, Collectively Evaluated for impairment	1,183	1,305	1,183	1,305
Beginning balance	1,217	1,255	1,112	1,322
Charge-offs	(54)	(24)	(172)	(53)
Recoveries	14	8	31	140
Provision (credit)	6	66	212	(104)
Residential Real Estate Lines [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	104,545	108,227	104,545	108,227	106,712
Loans, Collectively Evaluated for impairment	104,545	108,227	104,545	108,227
Ending balance	146	212	146	212
Allowance for loan losses, Collectively Evaluated for impairment	146	212	146	212
Beginning balance	145	248	210	180
Charge-offs	(8)	(23)	(10)	(124)
Recoveries	1	2	6	17
Provision (credit)	8	(15)	(60)	139
Consumer Indirect [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	834,968	878,316	834,968	878,316	888,732
Loans, Collectively Evaluated for impairment	834,968	878,316	834,968	878,316
Ending balance	11,842	12,355	11,842	12,355
Allowance for loan losses, Collectively Evaluated for impairment	11,842	12,355	11,842	12,355
Beginning balance	12,157	12,520	12,572	13,415
Charge-offs	(2,420)	(2,474)	(8,102)	(8,089)
Recoveries	1,103	1,228	4,205	3,862
Provision (credit)	1,002	1,081	3,167	3,167
Other Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	16,467	16,975	16,467	16,975	$ 16,590
Loans, Collectively Evaluated for impairment	16,467	16,975	16,467	16,975
Ending balance	420	430	420	430
Allowance for loan losses, Collectively Evaluated for impairment	420	430	420	430
Beginning balance	408	319	489	391
Charge-offs	(315)	(301)	(867)	(969)
Recoveries	73	64	299	230
Provision (credit)	$ 254	$ 348	$ 499	$ 778

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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