Loans and Allowance - Summary of Troubled Debt Restructurings by Modification Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Modifications [Line Items]
Modification	$ 1,212	$ 486	$ 5,378	$ 1,068
Term Modification
Financing Receivable, Modifications [Line Items]
Modification	138		2,993	283
Rate Modification
Financing Receivable, Modifications [Line Items]
Modification	255		301	155
Combination
Financing Receivable, Modifications [Line Items]
Modification	819	$ 486	2,084	630
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Modification	213		1,886
Commercial and industrial loans | Term Modification
Financing Receivable, Modifications [Line Items]
Modification	$ 138		$ 806
Commercial and industrial loans | Rate Modification
Financing Receivable, Modifications [Line Items]
Modification
Commercial and industrial loans | Combination
Financing Receivable, Modifications [Line Items]
Modification	$ 75		$ 1,080
Real estate loans - Commercial and farmland
Financing Receivable, Modifications [Line Items]
Modification	$ 744		2,341	283
Real estate loans - Commercial and farmland | Term Modification
Financing Receivable, Modifications [Line Items]
Modification			$ 1,337	$ 283
Real estate loans - Commercial and farmland | Rate Modification
Financing Receivable, Modifications [Line Items]
Modification
Real estate loans - Commercial and farmland | Combination
Financing Receivable, Modifications [Line Items]
Modification	$ 744		$ 1,004
Real estate loans - Residential
Financing Receivable, Modifications [Line Items]
Modification	$ 13	$ 241	909	$ 421
Real estate loans - Residential | Term Modification
Financing Receivable, Modifications [Line Items]
Modification			850
Real estate loans - Residential | Rate Modification
Financing Receivable, Modifications [Line Items]
Modification	$ 13		$ 59	$ 60
Real estate loans - Residential | Combination
Financing Receivable, Modifications [Line Items]
Modification		$ 241		361
Real estate loans - Home Equity
Financing Receivable, Modifications [Line Items]
Modification	$ 242	$ 245	$ 242	$ 340
Real estate loans - Home Equity | Term Modification
Financing Receivable, Modifications [Line Items]
Modification
Real estate loans - Home Equity | Rate Modification
Financing Receivable, Modifications [Line Items]
Modification	$ 242		$ 242	$ 95
Real estate loans - Home Equity | Combination
Financing Receivable, Modifications [Line Items]
Modification		$ 245		245
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Modification				$ 24
Individuals' loans for household and other personal expenditures | Rate Modification
Financing Receivable, Modifications [Line Items]
Modification
Individuals' loans for household and other personal expenditures | Combination
Financing Receivable, Modifications [Line Items]
Modification				$ 24