Loans - Loans Segregated by Class (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,309,860	$ 1,059,503
Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	950,696	974,573
Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	359,164	84,930
Construction, land and land development
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
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	905,624	641,484
Commercial real estate | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	645,316	587,022
Commercial real estate | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	260,308	54,462
Commercial real estate | Construction, land and land development
Loans and Leases Receivable Disclosure [Line Items]
Loans	152,991	121,093
Commercial real estate | Construction, land and land development | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	101,433	109,577
Commercial real estate | Construction, land and land development | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	51,558	11,516
Commercial real estate | Other commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	752,633	520,391
Commercial real estate | Other commercial real estate | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	543,883	477,445
Commercial real estate | Other commercial real estate | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	208,750	42,946
Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	218,224	183,021
Residential real estate | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	163,750	167,714
Residential real estate | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	54,474	15,307
Commercial, financial & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	166,228	213,380
Commercial, financial & agricultural | Paycheck Protection Program, CARES Act
Loans and Leases Receivable Disclosure [Line Items]
Loans	17,000	101,100
Commercial, financial & agricultural | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	125,213	200,800
Commercial, financial & agricultural | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	41,015	12,580
Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	19,784	21,618
Consumer and other | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	16,417	19,037
Consumer and other | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 3,367	$ 2,581