Loans - Loan Portfolio by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,059,503	$ 968,814
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	641,484	636,336
Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	183,021	194,796
Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	213,380	114,360
Consumer & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	21,618	23,322
Construction, land & land development
Loans and Leases Receivable Disclosure [Line Items]
Loans	121,093	96,097
Construction, land & land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	121,093	96,097
Other commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	520,391	540,239
Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	520,391	540,239
Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	974,573	847,100
Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	587,022	564,979
Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	167,714	171,341
Legacy Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	200,800	91,535
Legacy Loans | Consumer & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	19,037	19,245
Legacy Loans | Construction, land & land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	109,577	83,036
Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	477,445	481,943
Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	84,930	121,714
Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	54,462	71,357
Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	15,307	23,455
Purchased Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	12,580	22,825
Purchased Loans | Consumer & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,581	4,077
Purchased Loans | Construction, land & land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	11,516	13,061
Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	42,946	58,296
Pass | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	903,355	806,021
Pass | Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	529,945	541,386
Pass | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	157,927	159,194
Pass | Legacy Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	196,749	86,558
Pass | Legacy Loans | Consumer & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	18,734	18,883
Pass | Legacy Loans | Construction, land & land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	99,430	82,322
Pass | Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	430,515	459,064
Pass | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	79,571	117,494
Pass | Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	52,100	70,877
Pass | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	14,909	23,097
Pass | Purchased Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	10,198	19,443
Pass | Purchased Loans | Consumer & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,364	4,077
Pass | Purchased Loans | Construction, land & land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	11,275	12,996
Pass | Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	40,825	57,881
Special Mention | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	43,368	20,636
Special Mention | Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	36,519	13,883
Special Mention | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,855	4,632
Special Mention | Legacy Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,870	1,973
Special Mention | Legacy Loans | Consumer & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	124	148
Special Mention | Legacy Loans | Construction, land & land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,940	445
Special Mention | Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	33,579	13,438
Special Mention | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,434	3,579
Special Mention | Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	294	381
Special Mention | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	312	249
Special Mention | Purchased Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,803	2,949
Special Mention | Purchased Loans | Consumer & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	25	0
Special Mention | Purchased Loans | Construction, land & land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	241	0
Special Mention | Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	53	381
Substandard | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	27,850	20,443
Substandard | Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	20,558	9,710
Substandard | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	5,932	7,515
Substandard | Legacy Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,181	3,004
Substandard | Legacy Loans | Consumer & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	179	214
Substandard | Legacy Loans | Construction, land & land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	7,207	269
Substandard | Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	13,351	9,441
Substandard | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,925	641
Substandard | Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,068	99
Substandard | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	86	109
Substandard | Purchased Loans | Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	579	433
Substandard | Purchased Loans | Consumer & other
Loans and Leases Receivable Disclosure [Line Items]
Loans	192	0
Substandard | Purchased Loans | Construction, land & land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	0	65
Substandard | Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 2,068	$ 34