Loans - Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,101,606	$ 968,814
Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,005,172	847,100
Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	96,434	121,714
Construction, land and land development
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
Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	185,118	194,796
Residential real estate | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	168,139	171,341
Residential real estate | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	16,979	23,455
Commercial, financial, & agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	254,915	114,360
Commercial, financial, & agricultural | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	242,351	91,535
Commercial, financial, & agricultural | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	12,564	22,825
Consumer and other
Loans and Leases Receivable Disclosure [Line Items]
Loans	23,290	23,322
Consumer and other | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	20,420	19,245
Consumer and other | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,870	4,077
Commercial Real Estate Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Loans	638,283	636,336
Commercial Real Estate Portfolio Segment | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	574,262	564,979
Commercial Real Estate Portfolio Segment | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	64,021	71,357
Commercial Real Estate Portfolio Segment | Construction, land and land development
Loans and Leases Receivable Disclosure [Line Items]
Loans	128,291	96,097
Commercial Real Estate Portfolio Segment | Construction, land and land development | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	110,162	83,036
Commercial Real Estate Portfolio Segment | Construction, land and land development | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	18,129	13,061
Commercial Real Estate Portfolio Segment | Other commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans	509,992	540,239
Commercial Real Estate Portfolio Segment | Other commercial real estate | Legacy Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	464,100	481,943
Commercial Real Estate Portfolio Segment | Other commercial real estate | Purchased Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 45,892	$ 58,296