Loans - Loan Portfolio by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,062,775	$ 1,059,503
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	654,047	641,484
Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	178,211	183,021
Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	210,315	213,380
Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	20,202	21,618
Construction, land and land development
Loans and Leases Receivable Disclosure [Line Items]
Loans	115,967	121,093
Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	115,967	121,093
Other commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	538,080	520,391
Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	538,080	520,391
Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	992,993	974,573
Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	609,189	587,022
Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	165,887	167,714
Legacy Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	199,862	200,800
Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	18,055	19,037
Legacy Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	109,585	109,577
Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	499,604	477,445
Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	69,783	84,930
Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	44,860	54,462
Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	12,324	15,307
Purchased Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	10,452	12,580
Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,147	2,581
Purchased Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	6,383	11,516
Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	38,477	42,946
Pass | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	921,469	903,355
Pass | Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	550,990	529,945
Pass | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	156,665	157,927
Pass | Legacy Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	196,052	196,749
Pass | Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	17,762	18,734
Pass | Legacy Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	98,634	99,430
Pass | Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	452,356	430,515
Pass | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	61,024	79,571
Pass | Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	38,654	52,100
Pass | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	11,944	14,909
Pass | Purchased Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	8,283	10,198
Pass | Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,143	2,364
Pass | Purchased Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	6,263	11,275
Pass | Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	32,391	40,825
Special Mention | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	39,559	43,368
Special Mention | Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	33,545	36,519
Special Mention | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,090	3,855
Special Mention | Legacy Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,795	2,870
Special Mention | Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	129	124
Special Mention | Legacy Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,244	2,940
Special Mention | Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	30,301	33,579
Special Mention | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	5,538	2,434
Special Mention | Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,543	294
Special Mention | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	301	312
Special Mention | Purchased Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,690	1,803
Special Mention | Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	4	25
Special Mention | Purchased Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	120	241
Special Mention | Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,423	53
Substandard | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	31,964	27,850
Substandard | Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	24,653	20,558
Substandard | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	6,132	5,932
Substandard | Legacy Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,015	1,181
Substandard | Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	164	179
Substandard | Legacy Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	7,707	7,207
Substandard | Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	16,946	13,351
Substandard | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,221	2,925
Substandard | Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,663	2,068
Substandard | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	78	86
Substandard | Purchased Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	480	579
Substandard | Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	0	192
Substandard | Purchased Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	0	0
Substandard | Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 2,663	$ 2,068