Loans and Allowance - Summary of Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014 loan	Sep. 30, 2013 loan	Sep. 30, 2014 loan	Sep. 30, 2013 loan
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	$ 485	$ 1,816	$ 1,047	$ 7,445
Post-Modification Recorded Balance	492	1,843	1,056	6,459
Number of Loans	12	9	20	25
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance		162		294
Post-Modification Recorded Balance		183		315
Number of Loans		1		5
Real estate loans - Commercial and farm land
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance		1,464	259	6,449
Post-Modification Recorded Balance		1,469	259	5,450
Number of Loans		6	1	10
Real estate loans - Residential
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	256	190	448	658
Post-Modification Recorded Balance	245	191	428	649
Number of Loans	5	2	7	8
Real estate loans - Home equity
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance	229		314
Post-Modification Recorded Balance	247		343
Number of Loans	7		10
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Pre-Modification Recorded Balance			26	44
Post-Modification Recorded Balance			$ 26	$ 45
Number of Loans			2	2