Loans (Changes In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	$ 2,946,668	$ 2,577,068	$ 2,946,668	$ 2,577,068	$ 2,694,922
Loans, Individually Evaluated for impairment	4,701	9,585	4,701	9,585
Loans, Collectively Evaluated for impairment	2,941,967	2,567,483	2,941,967	2,567,483
Ending balance	33,955	34,347	33,955	34,347
Allowance for loan losses, Individually Evaluated for impairment	891	2,829	891	2,829
Allowance for loan losses, Collectively Evaluated for impairment	33,064	31,518	33,064	31,518
Beginning balance	33,955	33,159	34,672	30,934
Charge-offs	(3,607)	(2,909)	(10,465)	(10,243)
Recoveries	1,546	1,295	4,698	4,241
Provision (credit)	2,061	2,802	5,050	9,415
Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	537,160	418,873	537,160	418,873	449,763
Loans, Individually Evaluated for impairment	2,338	7,126	2,338	7,126
Loans, Collectively Evaluated for impairment	534,822	411,747	534,822	411,747
Ending balance	14,231	15,749	14,231	15,749
Allowance for loan losses, Individually Evaluated for impairment	431	2,658	431	2,658
Allowance for loan losses, Collectively Evaluated for impairment	13,800	13,091	13,800	13,091
Beginning balance	14,242	14,622	15,668	7,225
Charge-offs	(672)	(130)	(1,113)	(1,908)
Recoveries	241	86	438	332
Provision (credit)	420	1,171	(762)	10,100
Commercial Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	907,107	759,898	907,107	759,898	810,851
Loans, Individually Evaluated for impairment	2,363	2,459	2,363	2,459
Loans, Collectively Evaluated for impairment	904,744	757,439	904,744	757,439
Ending balance	5,422	3,727	5,422	3,727
Allowance for loan losses, Individually Evaluated for impairment	460	171	460	171
Allowance for loan losses, Collectively Evaluated for impairment	4,962	3,556	4,962	3,556
Beginning balance	5,371	3,906	3,696	10,315
Charge-offs	(113)		(117)	(10)
Recoveries	3	5	11	257
Provision (credit)	161	(184)	1,832	(6,835)
Residential Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	498,883	438,936	498,883	438,936	457,761
Loans, Collectively Evaluated for impairment	498,883	438,936	498,883	438,936
Ending balance	1,305	1,161	1,305	1,161
Allowance for loan losses, Collectively Evaluated for impairment	1,305	1,161	1,305	1,161
Beginning balance	1,255	1,247	1,322	1,478
Charge-offs	(24)	(198)	(53)	(298)
Recoveries	8	37	140	85
Provision (credit)	66	75	(104)	(104)
Residential Real Estate Lines [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	108,227	114,747	108,227	114,747	113,422
Loans, Collectively Evaluated for impairment	108,227	114,747	108,227	114,747
Ending balance	212	157	212	157
Allowance for loan losses, Collectively Evaluated for impairment	212	157	212	157
Beginning balance	248	232	180	303
Charge-offs	(23)	(21)	(124)	(64)
Recoveries	2	2	17	58
Provision (credit)	(15)	(56)	139	(140)
Consumer Indirect [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	878,316	827,154	878,316	827,154	845,682
Loans, Collectively Evaluated for impairment	878,316	827,154	878,316	827,154
Ending balance	12,355	13,217	12,355	13,217
Allowance for loan losses, Collectively Evaluated for impairment	12,355	13,217	12,355	13,217
Beginning balance	12,520	12,833	13,415	11,311
Charge-offs	(2,474)	(2,330)	(8,089)	(7,343)
Recoveries	1,228	1,086	3,862	3,259
Provision (credit)	1,081	1,628	3,167	5,990
Other Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	16,975	17,460	16,975	17,460	$ 17,443
Loans, Collectively Evaluated for impairment	16,975	17,460	16,975	17,460
Ending balance	430	336	430	336
Allowance for loan losses, Collectively Evaluated for impairment	430	336	430	336
Beginning balance	319	319	391	302
Charge-offs	(301)	(230)	(969)	(620)
Recoveries	64	79	230	250
Provision (credit)	$ 348	$ 168	$ 778	$ 404

A valuation allowance for financing receivables that are expected to be uncollectible.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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Amount of direct write-downs of financing receivables charged against the allowance.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
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-Paragraph 11B
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