Loans and Allowance - Summary of Troubled Debt Restructurings by Modification (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Financing Receivable, Modifications [Line Items]
Modification	$ 149	$ 552
Troubled Debt Restructurings, Term Modifications
Financing Receivable, Modifications [Line Items]
Modification		31
Troubled Debt Restructurings Rate Modifications
Financing Receivable, Modifications [Line Items]
Modification	134
Troubled Debt Restructurings, Combination
Financing Receivable, Modifications [Line Items]
Modification	15	521
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Modification		100
Commercial and industrial loans | Troubled Debt Restructurings, Term Modifications
Financing Receivable, Modifications [Line Items]
Modification		31
Commercial and industrial loans | Troubled Debt Restructurings, Combination
Financing Receivable, Modifications [Line Items]
Modification		69
Real estate loans - Commercial and farm land
Financing Receivable, Modifications [Line Items]
Modification		415
Real estate loans - Commercial and farm land | Troubled Debt Restructurings, Combination
Financing Receivable, Modifications [Line Items]
Modification		415
Real estate loans - Residential
Financing Receivable, Modifications [Line Items]
Modification	134	37
Real estate loans - Residential | Troubled Debt Restructurings Rate Modifications
Financing Receivable, Modifications [Line Items]
Modification	134
Real estate loans - Residential | Troubled Debt Restructurings, Combination
Financing Receivable, Modifications [Line Items]
Modification		37
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Modification	15
Individuals' loans for household and other personal expenditures | Troubled Debt Restructurings, Combination
Financing Receivable, Modifications [Line Items]
Modification	$ 15