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Loans and Allowance for Loan Losses - Summary of Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 3,525	$ 4,170
Unpaid Principal Balance, With no related allowance recorded	4,622	4,431
Average Recorded Investment, With no related allowance recorded	3,583	4,415
Interest Income Recognized, With no related allowance recorded	52	190
Recorded Investment, With an allowance recorded	3,749	1,925
Unpaid Principal Balance, With an allowance recorded	3,752	1,925
Allocated Related Allowance, With an allowance recorded	51	6
Average Recorded Investment, With an allowance recorded	3,842	1,944
Interest Income Recognized, With an allowance recorded	170	118
Total impaired loans, Recorded Investment	7,274	6,095
Total impaired loans, Unpaid Principal Balance	8,374	6,356
Total impaired loans, Allocated Related Allowance	51	6
Total impaired loans, Average Recorded Investment	7,425	6,359
Total impaired loans, Interest Income Recognized	222	307
Commercial (Secured by Real Estate)
Financing Receivable Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,136	26
Unpaid Principal Balance, With no related allowance recorded	2,232	26
Average Recorded Investment, With no related allowance recorded	1,138	40
Interest Income Recognized, With no related allowance recorded	42	9
Recorded Investment, With an allowance recorded	1,448	1,513
Unpaid Principal Balance, With an allowance recorded	1,449	1,513
Allocated Related Allowance, With an allowance recorded	2	1
Average Recorded Investment, With an allowance recorded		1,539
Interest Income Recognized, With an allowance recorded	91	94
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Recorded Investment, With no related allowance recorded	395	395
Unpaid Principal Balance, With no related allowance recorded	395	527
Average Recorded Investment, With no related allowance recorded	395	463
Interest Income Recognized, With no related allowance recorded		29
Recorded Investment, With an allowance recorded	690
Unpaid Principal Balance, With an allowance recorded	690
Allocated Related Allowance, With an allowance recorded	35
Average Recorded Investment, With an allowance recorded	1,481
Interest Income Recognized, With an allowance recorded	6
Construction, Land and Acquisition & Development
Financing Receivable Impaired [Line Items]
Average Recorded Investment, With an allowance recorded	727
Residential Mortgage
Financing Receivable Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,986	3,749
Unpaid Principal Balance, With no related allowance recorded	1,987	3,878
Average Recorded Investment, With no related allowance recorded	2,041	3,912
Interest Income Recognized, With no related allowance recorded	9	153
Recorded Investment, With an allowance recorded	1,611	412
Unpaid Principal Balance, With an allowance recorded	1,613	412
Allocated Related Allowance, With an allowance recorded	14	5
Average Recorded Investment, With an allowance recorded		405
Interest Income Recognized, With an allowance recorded	73
Consumer Installment
Financing Receivable Impaired [Line Items]
Recorded Investment, With no related allowance recorded	8
Unpaid Principal Balance, With no related allowance recorded	8
Average Recorded Investment, With no related allowance recorded	9
Interest Income Recognized, With no related allowance recorded	1
Average Recorded Investment, With an allowance recorded	$ 1,634
Interest Income Recognized, With an allowance recorded		$ 24

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