Loans and Allowance - Summary of Troubled Debt Restructurings by Modification (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Modifications [Line Items]
Modification	$ 486	$ 1,766	$ 1,068	$ 4,271
Troubled Debt Restructurings, Term Modifications
Financing Receivable, Modifications [Line Items]
Modification		1,732	283	1,785
Troubled Debt Restructurings Rate Modifications
Financing Receivable, Modifications [Line Items]
Modification		34	155	94
Troubled Debt Restructurings, Combination
Financing Receivable, Modifications [Line Items]
Modification	486		630	2,392
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Modification		175		291
Commercial and industrial loans | Troubled Debt Restructurings, Term Modifications
Financing Receivable, Modifications [Line Items]
Modification		175		228
Commercial and industrial loans | Troubled Debt Restructurings, Combination
Financing Receivable, Modifications [Line Items]
Modification				63
Real estate loans - Commercial and farm land
Financing Receivable, Modifications [Line Items]
Modification		1,399	283	3,349
Real estate loans - Commercial and farm land | Troubled Debt Restructurings, Term Modifications
Financing Receivable, Modifications [Line Items]
Modification		1,399	283	1,399
Real estate loans - Commercial and farm land | Troubled Debt Restructurings, Combination
Financing Receivable, Modifications [Line Items]
Modification				1,950
Real estate loans - Residential
Financing Receivable, Modifications [Line Items]
Modification	241	192	421	605
Real estate loans - Residential | Troubled Debt Restructurings, Term Modifications
Financing Receivable, Modifications [Line Items]
Modification		158		158
Real estate loans - Residential | Troubled Debt Restructurings Rate Modifications
Financing Receivable, Modifications [Line Items]
Modification		34	60	94
Real estate loans - Residential | Troubled Debt Restructurings, Combination
Financing Receivable, Modifications [Line Items]
Modification	241		361	353
Real estate loans - Home equity
Financing Receivable, Modifications [Line Items]
Modification	245		340
Real estate loans - Home equity | Troubled Debt Restructurings Rate Modifications
Financing Receivable, Modifications [Line Items]
Modification			95
Real estate loans - Home equity | Troubled Debt Restructurings, Combination
Financing Receivable, Modifications [Line Items]
Modification	245		245
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Modification			24	26
Individuals' loans for household and other personal expenditures | Troubled Debt Restructurings, Combination
Financing Receivable, Modifications [Line Items]
Modification			$ 24	$ 26