Loans and Allowance for Credit Losses - Summary of Accrued Interest on Non Accrual Loans Reversed Through Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest reversed through interest income	$ 466	$ 54	$ 581	$ 133
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest reversed through interest income	371	13	435	32
Construction, land development, land
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest reversed through interest income	1	0	1	9
1-4 family residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest reversed through interest income	21	0	31	12
Farmland
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest reversed through interest income	36	26	36	27
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest reversed through interest income	37	13	76	50
Factored receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest reversed through interest income	0	0	0	0
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest reversed through interest income	0	2	2	3
Mortgage warehouse
Financing Receivable, Allowance for Credit Loss [Line Items]
Accrued interest reversed through interest income	$ 0	$ 0	$ 0	$ 0