Loans and Allowance - Summary of Troubled Debt Restructurings by Modification (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Total Modification	$ 5,378	$ 1,263
Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification	2,815	319
Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	439	318
Combination
Financing Receivable, Modifications [Line Items]
Total Modification	2,124	626
Commercial and industrial loans
Financing Receivable, Modifications [Line Items]
Total Modification	1,814
Commercial and industrial loans | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification	761
Commercial and industrial loans | Combination
Financing Receivable, Modifications [Line Items]
Total Modification	1,053
Commercial and farmland
Financing Receivable, Modifications [Line Items]
Total Modification	2,257	288
Commercial and farmland | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification	1,231	$ 288
Commercial and farmland | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification
Commercial and farmland | Combination
Financing Receivable, Modifications [Line Items]
Total Modification	1,026
Residential
Financing Receivable, Modifications [Line Items]
Total Modification	1,038	$ 609
Residential | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification	823	31
Residential | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	170	218
Residential | Combination
Financing Receivable, Modifications [Line Items]
Total Modification	45	360
Home equity
Financing Receivable, Modifications [Line Items]
Total Modification	242	$ 343
Home equity | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification
Home equity | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	$ 242	$ 100
Home equity | Combination
Financing Receivable, Modifications [Line Items]
Total Modification		243
Individuals' loans for household and other personal expenditures
Financing Receivable, Modifications [Line Items]
Total Modification	$ 27	$ 23
Individuals' loans for household and other personal expenditures | Term Modification
Financing Receivable, Modifications [Line Items]
Total Modification
Individuals' loans for household and other personal expenditures | Rate Modification
Financing Receivable, Modifications [Line Items]
Total Modification	$ 27
Individuals' loans for household and other personal expenditures | Combination
Financing Receivable, Modifications [Line Items]
Total Modification		$ 23