Loans And Allowance For Loan Losses (Schedule Of How The Loans Were Modified As Troubled Debt Restructured Loans) (Details) (USD $) In Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2011
Financing Receivable, Modifications [Line Items]
Adjusted Interest Rate
Extended Maturity	1,468	4,029
Combined Rate and Maturity		101
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Adjusted Interest Rate
Extended Maturity	82	82
Combined Rate and Maturity
Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Adjusted Interest Rate
Extended Maturity		2,479
Combined Rate and Maturity
Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Adjusted Interest Rate
Extended Maturity	1,386	1,468
Combined Rate and Maturity		101
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Adjusted Interest Rate
Extended Maturity
Combined Rate and Maturity