Troubled Debt Restructurings (Schedule Of Loans Modified As Troubled Debt Restructurings) (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 loan	Mar. 31, 2012 loan
Financing Receivable, Modifications [Line Items]
# of Loans	2	12
Pre-Mod. Recorded Investment	$ 65,000	$ 1,125,000
Post-Mod. Recorded Investment	63,000	1,122,000
Commercial [Member]
Financing Receivable, Modifications [Line Items]
# of Loans	1
Pre-Mod. Recorded Investment	51,000
Post-Mod. Recorded Investment	49,000
Agriculture [Member]
Financing Receivable, Modifications [Line Items]
# of Loans
Pre-Mod. Recorded Investment
Post-Mod. Recorded Investment
Consumer Installment Loans [Member]
Financing Receivable, Modifications [Line Items]
# of Loans	1	3
Pre-Mod. Recorded Investment	14,000	25,000
Post-Mod. Recorded Investment	14,000	24,000
All Other Loans [Member]
Financing Receivable, Modifications [Line Items]
# of Loans
Pre-Mod. Recorded Investment
Post-Mod. Recorded Investment
Real Estate [Member]
Financing Receivable, Modifications [Line Items]
# of Loans		9
Pre-Mod. Recorded Investment		1,100,000
Post-Mod. Recorded Investment		1,098,000
Real Estate [Member] | Commercial [Member]
Financing Receivable, Modifications [Line Items]
# of Loans		7
Pre-Mod. Recorded Investment		991,000
Post-Mod. Recorded Investment		989,000
Real Estate [Member] | Construction And Land Development [Member]
Financing Receivable, Modifications [Line Items]
# of Loans
Pre-Mod. Recorded Investment
Post-Mod. Recorded Investment
Real Estate [Member] | Residential 1-4 Family [Member]
Financing Receivable, Modifications [Line Items]
# of Loans		2
Pre-Mod. Recorded Investment		109,000
Post-Mod. Recorded Investment		109,000
Real Estate [Member] | Multifamily [Member]
Financing Receivable, Modifications [Line Items]
# of Loans
Pre-Mod. Recorded Investment
Post-Mod. Recorded Investment
Real Estate [Member] | Farmland [Member]
Financing Receivable, Modifications [Line Items]
# of Loans
Pre-Mod. Recorded Investment
Post-Mod. Recorded Investment