Loans and Allowance - Summary of Troubled Debt Restructurings by Modification Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	$ 2,641	$ 184	$ 3,663	$ 433
Term Modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	2,495		3,186	0
Rate Modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	146		256	88
Combination
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	0	184	221	345
Commercial and industrial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification			585
Commercial and industrial loans | Term Modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification			585
Commercial and industrial loans | Combination
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification			0
Commercial and farmland
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification			106
Commercial and farmland | Term Modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification			106
Commercial and farmland | Combination
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification			0
Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	2,317	184	2,648	433
Residential | Term Modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	2,266		2,266
Residential | Rate Modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	51		161	88
Residential | Combination
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification		$ 184	221	$ 345
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	307		307
Home equity | Term Modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	212		212
Home equity | Rate Modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	95		95
Individuals' loans for household and other personal expenditures
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	17		17
Individuals' loans for household and other personal expenditures | Term Modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	17		17
Individuals' loans for household and other personal expenditures | Rate Modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modification	$ 0		$ 0