Loans and Allowance - Summary of Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 loan	Mar. 31, 2013 loan
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 146	$ 644
Post-Modification Recorded Balance	149	565
Number of Loans	4	6
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance		96
Post-Modification Recorded Balance		96
Number of Loans		3
Real estate loans - Commercial and farm land
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance		511
Post-Modification Recorded Balance		431
Number of Loans		2
Real estate loans - Residential
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	131	37
Post-Modification Recorded Balance	134	38
Number of Loans	3	1
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	15
Post-Modification Recorded Balance	$ 15
Number of Loans	1