Loans (Changes In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	$ 2,858,843	$ 2,479,034	$ 2,858,843	$ 2,479,034	$ 2,694,922
Loans, Individually Evaluated for impairment	6,792	9,422	6,792	9,422
Loans, Collectively Evaluated for impairment	2,852,051	2,469,612	2,852,051	2,469,612
Ending balance	33,955	33,159	33,955	33,159
Allowance for loan losses, Individually Evaluated for impairment	1,743	2,803	1,743	2,803
Allowance for loan losses, Collectively Evaluated for impairment	32,212	30,356	32,212	30,356
Beginning balance	35,594	31,081	34,672	30,934
Charge-offs	(3,209)	(3,133)	(6,858)	(7,334)
Recoveries	1,530	1,379	3,152	2,946
Provision (credit)	40	3,832	2,989	6,613
Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	506,265	397,802	506,265	397,802	449,763
Loans, Individually Evaluated for impairment	4,164	7,258	4,164	7,258
Loans, Collectively Evaluated for impairment	502,101	390,544	502,101	390,544
Ending balance	14,242	14,622	14,242	14,622
Allowance for loan losses, Individually Evaluated for impairment	1,226	2,683	1,226	2,683
Allowance for loan losses, Collectively Evaluated for impairment	13,016	11,939	13,016	11,939
Beginning balance	14,942	14,003	15,668	7,225
Charge-offs	(336)	(656)	(441)	(1,778)
Recoveries	77	88	197	246
Provision (credit)	(441)	1,187	(1,182)	8,929
Commercial Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	869,192	725,793	869,192	725,793	810,851
Loans, Individually Evaluated for impairment	2,628	2,164	2,628	2,164
Loans, Collectively Evaluated for impairment	866,564	723,629	866,564	723,629
Ending balance	5,371	3,906	5,371	3,906
Allowance for loan losses, Individually Evaluated for impairment	517	120	517	120
Allowance for loan losses, Collectively Evaluated for impairment	4,854	3,786	4,854	3,786
Beginning balance	5,473	3,667	3,696	10,315
Charge-offs			(4)	(10)
Recoveries	1	38	8	252
Provision (credit)	(103)	201	1,671	(6,651)
Residential Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	481,841	425,285	481,841	425,285	457,761
Loans, Collectively Evaluated for impairment	481,841	425,285	481,841	425,285
Ending balance	1,255	1,247	1,255	1,247
Allowance for loan losses, Collectively Evaluated for impairment	1,255	1,247	1,255	1,247
Beginning balance	1,400	1,440	1,322	1,478
Charge-offs	(10)	(86)	(29)	(100)
Recoveries	63	8	132	48
Provision (credit)	(198)	(115)	(170)	(179)
Residential Real Estate Lines [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	110,319	115,768	110,319	115,768	113,422
Loans, Collectively Evaluated for impairment	110,319	115,768	110,319	115,768
Ending balance	248	232	248	232
Allowance for loan losses, Collectively Evaluated for impairment	248	232	248	232
Beginning balance	218	214	180	303
Charge-offs	(7)		(101)	(43)
Recoveries	12	46	15	56
Provision (credit)	25	(28)	154	(84)
Consumer Indirect [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	874,718	797,469	874,718	797,469	845,682
Loans, Collectively Evaluated for impairment	874,718	797,469	874,718	797,469
Ending balance	12,520	12,833	12,520	12,833
Allowance for loan losses, Collectively Evaluated for impairment	12,520	12,833	12,520	12,833
Beginning balance	13,232	11,462	13,415	11,311
Charge-offs	(2,621)	(2,204)	(5,615)	(5,013)
Recoveries	1,304	1,122	2,634	2,173
Provision (credit)	605	2,453	2,086	4,362
Other Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, Ending balance	16,508	16,917	16,508	16,917	$ 17,443
Loans, Collectively Evaluated for impairment	16,508	16,917	16,508	16,917
Ending balance	319	319	319	319
Allowance for loan losses, Collectively Evaluated for impairment	319	319	319	319
Beginning balance	329	295	391	302
Charge-offs	(235)	(187)	(668)	(390)
Recoveries	73	77	166	171
Provision (credit)	$ 152	$ 134	$ 430	$ 236

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
-Topic 942
-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
-Section 50
-Paragraph 11B
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