Loans And Allowance For Loan Losses (Schedule Of Allowance For Loan Losses By Portfolio Segment) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 9,814	$ 9,478	$ 9,439	$ 8,969	$ 8,969
Charged off	(99)	(789)	(263)	(958)	(1,619)
Recoveries	26	10	100	193	304
Provision	150	400	615	895	1,785
Ending Balance	9,891	9,099	9,891	9,099	9,439
Amount for loans individually evaluated for impairment	370	676	370	676	373
Amount for loans collectively evaluated for impairment	9,521	8,423	9,521	8,423	9,066
Loans individually evaluated for impairment	5,435	6,076	5,435	6,076	5,739
Loans collectively evaluated for impairment	1,043,456	977,045	1,043,456	977,045	984,227
Commercial Real Estate Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	4,667	4,500	4,246	4,468	4,468
Charged off		(181)	(34)	(206)	(667)
Recoveries	7	5	13	39	98
Provision	(9)	(35)	440	(12)	347
Ending Balance	4,665	4,289	4,665	4,289	4,246
Amount for loans individually evaluated for impairment	43	419	43	419	43
Amount for loans collectively evaluated for impairment	4,622	3,870	4,622	3,870	4,203
Loans individually evaluated for impairment	2,436	2,992	2,436	2,992	2,223
Loans collectively evaluated for impairment	387,597	351,137	387,597	351,137	368,779
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,233	1,074	1,236	929	929
Charged off	(1)	(213)	(90)	(288)	(323)
Recoveries	3	1	4	2	36
Provision	32	285	117	504	594
Ending Balance	1,267	1,147	1,267	1,147	1,236
Amount for loans individually evaluated for impairment	175	169	175	169	175
Amount for loans collectively evaluated for impairment	1,092	978	1,092	978	1,061
Loans individually evaluated for impairment	309	469	309	469	426
Loans collectively evaluated for impairment	80,440	87,733	80,440	87,733	79,485
Commercial Construction And Land Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	231	107	184	145	145
Charged off
Recoveries
Provision	(36)	38	11		39
Ending Balance	195	145	195	145	184
Amount for loans individually evaluated for impairment	60		60		58
Amount for loans collectively evaluated for impairment	135	145	135	145	126
Loans individually evaluated for impairment	813	1,260	813	1,260	1,111
Loans collectively evaluated for impairment	24,654	33,160	24,654	33,160	23,815
Agriculture And Other Loans To Farmers [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	365	334	307	277	277
Charged off				(18)	(72)
Recoveries			40	12	18
Provision	18	38	36	101	84
Ending Balance	383	372	383	372	307
Amount for loans individually evaluated for impairment		47		47
Amount for loans collectively evaluated for impairment	383	325	383	325	307
Loans individually evaluated for impairment	127	166	127	166	106
Loans collectively evaluated for impairment	32,954	33,368	32,954	33,368	30,897
Residential Real Estate Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,621	2,875	2,747	2,714	2,714
Charged off	(91)	(70)	(122)	(70)	(70)
Recoveries	8		28	129	129
Provision	145	(320)	30	(288)	(26)
Ending Balance	2,683	2,485	2,683	2,485	2,747
Amount for loans individually evaluated for impairment	54	40	54	40	97
Amount for loans collectively evaluated for impairment	2,629	2,445	2,629	2,445	2,650
Loans individually evaluated for impairment	1,540	1,180	1,540	1,180	1,847
Loans collectively evaluated for impairment	445,393	392,575	445,393	392,575	404,805
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	108	145	111	94	94
Charged off	(7)	(14)	(17)	(25)	(111)
Recoveries	7	4	13	11	22
Provision	(8)	(25)	(7)	30	106
Ending Balance	100	110	100	110	111
Amount for loans individually evaluated for impairment	38		38
Amount for loans collectively evaluated for impairment	62	110	62	110	111
Loans individually evaluated for impairment	7	9	7	9	8
Loans collectively evaluated for impairment	6,939	11,132	6,939	11,132	9,690
Home Equity Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	539	367	561	271	271
Charged off		(311)		(351)	(376)
Recoveries	1		2		1
Provision	7	416	(16)	552	665
Ending Balance	547	472	547	472	561
Amount for loans individually evaluated for impairment		1		1
Amount for loans collectively evaluated for impairment	547	471	547	471	561
Loans individually evaluated for impairment	203		203		18
Loans collectively evaluated for impairment	49,127	51,794	49,127	51,794	51,512
Tax Exempt [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	50	76	47	71	71
Charged off
Recoveries
Provision	1		4	8	(24)
Ending Balance	51	79	51	79	47
Amount for loans collectively evaluated for impairment	51	79	51	79	47
Loans collectively evaluated for impairment	$ 16,352	$ 16,146	$ 16,352	$ 16,146	$ 15,244

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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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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