Loans - Age Analysis of Past Due Loans and Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans	$ 1,062,775	$ 1,059,503
Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	789	2,408
Nonaccrual Loans	8,698	6,610
Current Loans	983,506	965,555
Loans	992,993	974,573
Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	44	684
Nonaccrual Loans	1,979	2,518
Current Loans	67,760	81,728
Loans	69,783	84,930
30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	789	2,408
30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	44	684
90 Days or More Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
90 Days or More Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Construction, land and land development
Financing Receivable, Past Due [Line Items]
Loans	115,967	121,093
Other commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	538,080	520,391
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	654,047	641,484
Commercial real estate | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	132	1,543
Nonaccrual Loans	5,228	2,625
Current Loans	603,829	582,854
Loans	609,189	587,022
Commercial real estate | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	544
Nonaccrual Loans	1,883	2,185
Current Loans	42,977	51,733
Loans	44,860	54,462
Commercial real estate | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	132	1,543
Commercial real estate | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	544
Commercial real estate | 90 Days or More Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Commercial real estate | 90 Days or More Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Commercial real estate | Construction, land and land development
Financing Receivable, Past Due [Line Items]
Loans	115,967	121,093
Commercial real estate | Construction, land and land development | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	24	1,314
Nonaccrual Loans	74	80
Current Loans	109,487	108,183
Loans	109,585	109,577
Commercial real estate | Construction, land and land development | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Nonaccrual Loans	0	117
Current Loans	6,383	11,399
Loans	6,383	11,516
Commercial real estate | Construction, land and land development | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	24	1,314
Commercial real estate | Construction, land and land development | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Commercial real estate | Construction, land and land development | 90 Days or More Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Commercial real estate | Construction, land and land development | 90 Days or More Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Commercial real estate | Other commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	538,080	520,391
Commercial real estate | Other commercial real estate | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	108	229
Nonaccrual Loans	5,154	2,545
Current Loans	494,342	474,671
Loans	499,604	477,445
Commercial real estate | Other commercial real estate | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	544
Nonaccrual Loans	1,883	2,068
Current Loans	36,594	40,334
Loans	38,477	42,946
Commercial real estate | Other commercial real estate | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	108	229
Commercial real estate | Other commercial real estate | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	544
Commercial real estate | Other commercial real estate | 90 Days or More Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Commercial real estate | Other commercial real estate | 90 Days or More Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans	178,211	183,021
Residential real estate | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	471	667
Nonaccrual Loans	2,572	2,873
Current Loans	162,844	164,174
Loans	165,887	167,714
Residential real estate | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	17	15
Nonaccrual Loans	69	85
Current Loans	12,238	15,207
Loans	12,324	15,307
Residential real estate | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	471	667
Residential real estate | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	17	15
Residential real estate | 90 Days or More Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Residential real estate | 90 Days or More Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Commercial, financial & agricultural
Financing Receivable, Past Due [Line Items]
Loans	210,315	213,380
Commercial, financial & agricultural | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	149	150
Nonaccrual Loans	810	1,010
Current Loans	198,903	199,640
Loans	199,862	200,800
Commercial, financial & agricultural | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	27	125
Nonaccrual Loans	27	55
Current Loans	10,398	12,400
Loans	10,452	12,580
Commercial, financial & agricultural | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	149	150
Commercial, financial & agricultural | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	27	125
Commercial, financial & agricultural | 90 Days or More Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Commercial, financial & agricultural | 90 Days or More Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Consumer and other
Financing Receivable, Past Due [Line Items]
Loans	20,202	21,618
Consumer and other | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	37	48
Nonaccrual Loans	88	102
Current Loans	17,930	18,887
Loans	18,055	19,037
Consumer and other | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Nonaccrual Loans	0	193
Current Loans	2,147	2,388
Loans	2,147	2,581
Consumer and other | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	37	48
Consumer and other | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Consumer and other | 90 Days or More Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Consumer and other | 90 Days or More Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	$ 0	$ 0