Loans And Allowance For Loan Losses (Schedule Of Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Impaired loans, with no related allowance, Recorded Investment	$ 5,445		$ 5,445			$ 6,603
Impaired loans, with no related allowance, Recorded Investment, Subtotal	3,261		3,261			4,244
Impaired loans, with no related allowance, Unpaid Principal Balance	7,865		7,865			9,192
Impaired loans, with no related allowance, Unpaid Principal Balance, Subtotal	3,756		3,756			4,863
Impaired loans, with related allowance, Recorded Investment, Subtotal	2,184		2,184			2,359
Impaired loans, with related allowance, Unpaid Principal Balance, Subtotal	4,109		4,109			4,329
Impaired loans, Related Allowance, Subtotal	14		14			120
Impaired loans, Related Allowance	14		14			120
Impaired loans, with no related allowance, Average Recorded Investment	3,515	7,561		7,806
Impaired loans, with no related allowance, Average Recorded Investment, Subtotal			3,763
Impaired loans, with no related allowance, Interest Recorded			40
Impaired loans, with no related allowance, Interest Recorded, Subtotal	20			49
Impaired loans, with related allowance, Average Recorded Investment	5,751	8,599		8,844
Impaired loans, with related allowance, Average Recorded Investment, Subtotal	2,236	1,038	2,354	1,038
Impaired loans, with related allowance, Interest Recorded			40
Impaired loans, with related allowance, Interest Recorded, Subtotal
Impaired loans, Average Recorded Investment, Total			6,117
Impaired loans, Interest Recorded, Total	20			49
Commercial Real Estate Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, with no related allowance, Recorded Investment	2,331		2,331			2,662
Impaired loans, with no related allowance, Unpaid Principal Balance	2,714		2,714			3,072
Impaired loans, with related allowance, Recorded Investment	155		155
Impaired loans, with related allowance, Unpaid Principal Balance	155		155
Impaired loans, Related Allowance	8		8
Impaired loans, with no related allowance, Average Recorded Investment	2,294	3,202	2,253	3,290
Impaired loans, with no related allowance, Interest Recorded	17		34	49
Impaired loans, with related allowance, Average Recorded Investment	207	177	223	177
Impaired loans, with related allowance, Interest Recorded
Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, with no related allowance, Recorded Investment	479		479			841
Impaired loans, with no related allowance, Unpaid Principal Balance	539		539			966
Impaired loans, with no related allowance, Average Recorded Investment	597	596	757	752
Impaired loans, with no related allowance, Interest Recorded	1		3
Impaired loans, with related allowance, Average Recorded Investment		100		100
Impaired loans, with related allowance, Interest Recorded
Commercial Construction And Land Development [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, with related allowance, Recorded Investment	2,029		2,029			2,359
Impaired loans, with related allowance, Unpaid Principal Balance	3,954		3,954			4,329
Impaired loans, Related Allowance	6		6			120
Impaired loans, with no related allowance, Average Recorded Investment		3,011		3,018
Impaired loans, with no related allowance, Interest Recorded
Impaired loans, with related allowance, Average Recorded Investment	2,029	761	2,131	761
Impaired loans, with related allowance, Interest Recorded
Agriculture And Other Loans To Farmers [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, with no related allowance, Recorded Investment	151		151			664
Impaired loans, with no related allowance, Unpaid Principal Balance	170		170			748
Impaired loans, with related allowance, Recorded Investment
Impaired loans, with related allowance, Unpaid Principal Balance
Impaired loans, Related Allowance
Impaired loans, with no related allowance, Average Recorded Investment	323	612	452	606
Impaired loans, with no related allowance, Interest Recorded
Impaired loans, with related allowance, Average Recorded Investment
Impaired loans, with related allowance, Interest Recorded
Residential Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, with no related allowance, Recorded Investment	265		265			77
Impaired loans, with no related allowance, Unpaid Principal Balance	295		295			77
Impaired loans, with related allowance, Recorded Investment
Impaired loans, with related allowance, Unpaid Principal Balance
Impaired loans, Related Allowance
Impaired loans, with no related allowance, Average Recorded Investment	266	140	267	140
Impaired loans, with no related allowance, Interest Recorded	1		1
Impaired loans, with related allowance, Interest Recorded
Home Equity Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, with no related allowance, Recorded Investment	21		21
Impaired loans, with no related allowance, Unpaid Principal Balance	21		21
Impaired loans, with no related allowance, Average Recorded Investment	21		20
Impaired loans, with no related allowance, Interest Recorded	1		1
Impaired loans, with related allowance, Interest Recorded
Other Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, with no related allowance, Recorded Investment	14		14
Impaired loans, with no related allowance, Unpaid Principal Balance	17		17
Impaired loans, with no related allowance, Average Recorded Investment	14		14
Impaired loans, with no related allowance, Interest Recorded			1
Impaired loans, with related allowance, Interest Recorded