Loans - Loan Portfolio by Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,309,860	$ 1,059,503
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	905,624	641,484
Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	218,224	183,021
Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	166,228	213,380
Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	19,784	21,618
Construction, land and land development
Loans and Leases Receivable Disclosure [Line Items]
Loans	152,991	121,093
Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	152,991	121,093
Other commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	752,633	520,391
Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	752,633	520,391
Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	950,696	974,573
Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	645,316	587,022
Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	163,750	167,714
Legacy Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	125,213	200,800
Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	16,417	19,037
Legacy Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	101,433	109,577
Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	543,883	477,445
Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	359,164	84,930
Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	260,308	54,462
Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	54,474	15,307
Purchased Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	41,015	12,580
Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,367	2,581
Purchased Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	51,558	11,516
Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	208,750	42,946
Pass | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	896,591	903,355
Pass | Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	603,570	529,945
Pass | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	153,983	157,927
Pass | Legacy Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	122,991	196,749
Pass | Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	16,047	18,734
Pass | Legacy Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	98,619	99,430
Pass | Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	504,951	430,515
Pass | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	335,899	79,571
Pass | Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	245,409	52,100
Pass | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	47,407	14,909
Pass | Purchased Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	39,965	10,198
Pass | Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,118	2,364
Pass | Purchased Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	50,713	11,275
Pass | Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	194,696	40,825
Special Mention | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	29,221	43,368
Special Mention | Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	24,185	36,519
Special Mention | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,560	3,855
Special Mention | Legacy Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,332	2,870
Special Mention | Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	144	124
Special Mention | Legacy Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,078	2,940
Special Mention | Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	22,107	33,579
Special Mention | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	16,174	2,434
Special Mention | Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	11,605	294
Special Mention | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,886	312
Special Mention | Purchased Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	666	1,803
Special Mention | Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	17	25
Special Mention | Purchased Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	803	241
Special Mention | Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	10,802	53
Substandard | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	24,884	27,850
Substandard | Legacy Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	17,561	20,558
Substandard | Legacy Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	6,207	5,932
Substandard | Legacy Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	890	1,181
Substandard | Legacy Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	226	179
Substandard | Legacy Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	736	7,207
Substandard | Legacy Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	16,825	13,351
Substandard | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	7,091	2,925
Substandard | Purchased Loans | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,294	2,068
Substandard | Purchased Loans | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,181	86
Substandard | Purchased Loans | Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	384	579
Substandard | Purchased Loans | Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	232	192
Substandard | Purchased Loans | Construction, land and land development | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	42	0
Substandard | Purchased Loans | Other commercial real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 3,252	$ 2,068