Troubled Debt Restructurings (Schedule Of Troubled Debt Restructurings Sebsequently Defaulted) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012 loan
Financing Receivable, Modifications [Line Items]
# of Loans	8
Recorded Investment	$ 2,891,000
Commercial [Member]
Financing Receivable, Modifications [Line Items]
# of Loans	1
Recorded Investment	327,000
Agriculture [Member]
Financing Receivable, Modifications [Line Items]
# of Loans	1
Recorded Investment	300,000
Consumer Installment Loans [Member]
Financing Receivable, Modifications [Line Items]
# of Loans
Recorded Investment
All Other Loans [Member]
Financing Receivable, Modifications [Line Items]
# of Loans
Recorded Investment
Real Estate [Member]
Financing Receivable, Modifications [Line Items]
# of Loans	6
Recorded Investment	2,264,000
Real Estate [Member] | Commercial [Member]
Financing Receivable, Modifications [Line Items]
# of Loans	5
Recorded Investment	2,151,000
Real Estate [Member] | Construction And Land Development [Member]
Financing Receivable, Modifications [Line Items]
# of Loans
Recorded Investment
Real Estate [Member] | Residential 1-4 Family [Member]
Financing Receivable, Modifications [Line Items]
# of Loans	1
Recorded Investment	113,000
Real Estate [Member] | Multifamily [Member]
Financing Receivable, Modifications [Line Items]
# of Loans
Recorded Investment
Real Estate [Member] | Farmland [Member]
Financing Receivable, Modifications [Line Items]
# of Loans
Recorded Investment