Loans - Loan Portfolio by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,101,606	$ 968,814
Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	638,283	636,336
Construction, land and land development
Loans and Leases Receivable Disclosure [Line Items]
Loans	128,291	96,097
Construction, land and land development | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	128,291	96,097
Other commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	509,992	540,239
Other commercial real estate | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	509,992	540,239
Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	185,118	194,796
Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	254,915	114,360
Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	23,290	23,322
Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,005,172	847,100
Legacy Loans | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	574,262	564,979
Legacy Loans | Construction, land and land development | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	110,162	83,036
Legacy Loans | Other commercial real estate | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	464,100	481,943
Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	168,139	171,341
Legacy Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	242,351	91,535
Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	20,420	19,245
Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	96,434	121,714
Purchased Loans | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	64,021	71,357
Purchased Loans | Construction, land and land development | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	18,129	13,061
Purchased Loans | Other commercial real estate | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	45,892	58,296
Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	16,979	23,455
Purchased Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	12,564	22,825
Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,870	4,077
Pass | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	938,307	806,021
Pass | Legacy Loans | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	521,770	541,386
Pass | Legacy Loans | Construction, land and land development | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	99,109	82,322
Pass | Legacy Loans | Other commercial real estate | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	422,661	459,064
Pass | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	157,809	159,194
Pass | Legacy Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	238,613	86,558
Pass | Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	20,115	18,883
Pass | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	89,930	117,494
Pass | Purchased Loans | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	59,940	70,877
Pass | Purchased Loans | Construction, land and land development | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	16,430	12,996
Pass | Purchased Loans | Other commercial real estate | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	43,510	57,881
Pass | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	16,585	23,097
Pass | Purchased Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	10,637	19,443
Pass | Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,768	4,077
Special Mention | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	47,334	20,636
Special Mention | Legacy Loans | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	41,171	13,883
Special Mention | Legacy Loans | Construction, land and land development | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,930	445
Special Mention | Legacy Loans | Other commercial real estate | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	37,241	13,438
Special Mention | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,720	4,632
Special Mention | Legacy Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,320	1,973
Special Mention | Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	123	148
Special Mention | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	4,216	3,579
Special Mention | Purchased Loans | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,992	381
Special Mention | Purchased Loans | Construction, land and land development | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,620	0
Special Mention | Purchased Loans | Other commercial real estate | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	372	381
Special Mention | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	316	249
Special Mention | Purchased Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,889	2,949
Special Mention | Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	19	0
Substandard | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	19,531	20,443
Substandard | Legacy Loans | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	11,321	9,710
Substandard | Legacy Loans | Construction, land and land development | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	7,123	269
Substandard | Legacy Loans | Other commercial real estate | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	4,198	9,441
Substandard | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	6,610	7,515
Substandard | Legacy Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,418	3,004
Substandard | Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	182	214
Substandard | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,288	641
Substandard | Purchased Loans | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,089	99
Substandard | Purchased Loans | Construction, land and land development | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	79	65
Substandard | Purchased Loans | Other commercial real estate | Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,010	34
Substandard | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	78	109
Substandard | Purchased Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	38	433
Substandard | Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 83	$ 0