Loans and Allowance - Summary of Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014 loan	Jun. 30, 2013 loan	Jun. 30, 2014 loan	Jun. 30, 2013 loan
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 512	$ 4,986	$ 657	$ 5,629
Post-Modification Recorded Balance	512	4,051	661	4,616
Number of Loans	5	10	9	16
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance		36		133
Post-Modification Recorded Balance		36		133
Number of Loans		1		4
Real estate loans - Commercial and farm land
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	259	4,474	259	4,985
Post-Modification Recorded Balance	259	3,550	259	3,981
Number of Loans	1	2	1	4
Real estate loans - Residential
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	242	432	372	467
Post-Modification Recorded Balance	242	420	376	457
Number of Loans	3	5	6	6
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	11	44	26	44
Post-Modification Recorded Balance	$ 11	$ 45	$ 26	$ 45
Number of Loans	1	2	2	2