Allowance for Credit Losses, Loans by Class Modified as Troubled Debt Restructured Loans (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 Loan	Dec. 31, 2012 Loan
Financing Receivable, Modifications [Line Items]
Specific reserves	$ 1,200,000	$ 401,000
Troubled debt restructured loans	6,800,000	2,600,000
Commitments to lend additional amounts to customers with outstanding loans that are classified as troubled debt restructurings	0	0
Period of modifications involving a reduction of stated interest rate of the loan	5 years
Loans by class modified as troubled debt restructured loans [Abstract]
Number of Loans	12	18
Pre-Modification Outstanding Recorded Investment	5,736,000	2,033,000
Post-Modification Recorded Outstanding Investment	5,693,000	1,969,000
Increase in allowance for loan losses due to TDR	0	53,000
TDR's charge-offs	43,000	64,000
Period after which loan is considered to be in payment default	90 days
Charge offs on troubled debt restructurings that subsequently defaulted	0
Payment defaults on loans modified as troubled debt restructurings	174,000	0
Minimum [Member]
Financing Receivable, Modifications [Line Items]
Period of modifications involving extension of maturity date	6 months
Maximum [Member]
Financing Receivable, Modifications [Line Items]
Period of modifications involving extension of maturity date	10 years
Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans, performing	4,600,000	2,300,000
Commercial Real Estate [Member]
Loans by class modified as troubled debt restructured loans [Abstract]
Number of Loans		1
Pre-Modification Outstanding Recorded Investment		116,000
Post-Modification Recorded Outstanding Investment		116,000
Agricultural Real Estate [Member]
Loans by class modified as troubled debt restructured loans [Abstract]
Number of Loans		0
Pre-Modification Outstanding Recorded Investment		0
Post-Modification Recorded Outstanding Investment		0
Real Estate Construction [Member]
Loans by class modified as troubled debt restructured loans [Abstract]
Number of Loans		0
Pre-Modification Outstanding Recorded Investment		0
Post-Modification Recorded Outstanding Investment		0
Residential 1st Mortgages [Member]
Loans by class modified as troubled debt restructured loans [Abstract]
Number of Loans	4	2
Pre-Modification Outstanding Recorded Investment	306,000	216,000
Post-Modification Recorded Outstanding Investment	290,000	201,000
Home Equity Lines & Loans [Member]
Loans by class modified as troubled debt restructured loans [Abstract]
Number of Loans	4	7
Pre-Modification Outstanding Recorded Investment	414,000	529,000
Post-Modification Recorded Outstanding Investment	387,000	480,000
Agricultural [Member]
Loans by class modified as troubled debt restructured loans [Abstract]
Number of Loans		4
Pre-Modification Outstanding Recorded Investment		858,000
Post-Modification Recorded Outstanding Investment		858,000
Commercial [Member]
Loans by class modified as troubled debt restructured loans [Abstract]
Number of Loans	4	3
Pre-Modification Outstanding Recorded Investment	5,016,000	273,000
Post-Modification Recorded Outstanding Investment	5,016,000	273,000
Consumer & Other [Member]
Loans by class modified as troubled debt restructured loans [Abstract]
Number of Loans		1
Pre-Modification Outstanding Recorded Investment		41,000
Post-Modification Recorded Outstanding Investment		$ 41,000