Loans - Age Analysis of Past Due Loans and Nonaccrual (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Loans	$ 1,059,503	$ 968,814
Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	2,408	1,914
Nonaccrual Loans	6,610	9,179
Current Loans	965,555	836,007
Loans	974,573	847,100
Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	684	701
Nonaccrual Loans	2,518	648
Current Loans	81,728	120,365
Loans	84,930	121,714
Financing Receivables, 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	2,408	1,914
Financing Receivables, 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	684	701
Financial Asset, Equal to or Greater than 90 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Construction, land & land development
Financing Receivable, Past Due [Line Items]
Loans	121,093	96,097
Other commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	520,391	540,239
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	641,484	636,336
Commercial real estate | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	1,543	385
Nonaccrual Loans	2,625	3,770
Current Loans	582,854	560,824
Loans	587,022	564,979
Commercial real estate | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	544	83
Nonaccrual Loans	2,185	130
Current Loans	51,733	71,144
Loans	54,462	71,357
Commercial real estate | Financing Receivables, 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	1,543	385
Commercial real estate | Financing Receivables, 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	544	83
Commercial real estate | Financial Asset, Equal to or Greater than 90 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Commercial real estate | Financial Asset, Equal to or Greater than 90 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Commercial real estate | Construction, land & land development
Financing Receivable, Past Due [Line Items]
Loans	121,093	96,097
Commercial real estate | Construction, land & land development | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	1,314	50
Nonaccrual Loans	80	32
Current Loans	108,183	82,954
Loans	109,577	83,036
Commercial real estate | Construction, land & land development | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Nonaccrual Loans	117	96
Current Loans	11,399	12,965
Loans	11,516	13,061
Commercial real estate | Construction, land & land development | Financing Receivables, 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	1,314	50
Commercial real estate | Construction, land & land development | Financing Receivables, 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Commercial real estate | Construction, land & land development | Financial Asset, Equal to or Greater than 90 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Commercial real estate | Construction, land & land development | Financial Asset, Equal to or Greater than 90 Days 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	520,391	540,239
Commercial real estate | Other commercial real estate | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	229	335
Nonaccrual Loans	2,545	3,738
Current Loans	474,671	477,870
Loans	477,445	481,943
Commercial real estate | Other commercial real estate | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	544	83
Nonaccrual Loans	2,068	34
Current Loans	40,334	58,179
Loans	42,946	58,296
Commercial real estate | Other commercial real estate | Financing Receivables, 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	229	335
Commercial real estate | Other commercial real estate | Financing Receivables, 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	544	83
Commercial real estate | Other commercial real estate | Financial Asset, Equal to or Greater than 90 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Commercial real estate | Other commercial real estate | Financial Asset, Equal to or Greater than 90 Days 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	213,380	114,360
Commercial, financial, & agricultural | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	150	212
Nonaccrual Loans	1,010	1,628
Current Loans	199,640	89,695
Loans	200,800	91,535
Commercial, financial, & agricultural | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	125	553
Nonaccrual Loans	55	433
Current Loans	12,400	21,839
Loans	12,580	22,825
Commercial, financial, & agricultural | Financing Receivables, 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	150	212
Commercial, financial, & agricultural | Financing Receivables, 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	125	553
Commercial, financial, & agricultural | Financial Asset, Equal to or Greater than 90 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Commercial, financial, & agricultural | Financial Asset, Equal to or Greater than 90 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Consumer & other
Financing Receivable, Past Due [Line Items]
Loans	21,618	23,322
Consumer & other | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	48	21
Nonaccrual Loans	102	138
Current Loans	18,887	19,086
Loans	19,037	19,245
Consumer & other | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	8
Nonaccrual Loans	193	0
Current Loans	2,388	4,069
Loans	2,581	4,077
Consumer & other | Financing Receivables, 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	48	21
Consumer & other | Financing Receivables, 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	8
Consumer & other | Financial Asset, Equal to or Greater than 90 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Consumer & other | Financial Asset, Equal to or Greater than 90 Days 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	183,021	194,796
Residential real estate | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	667	1,296
Nonaccrual Loans	2,873	3,643
Current Loans	164,174	166,402
Loans	167,714	171,341
Residential real estate | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	15	57
Nonaccrual Loans	85	85
Current Loans	15,207	23,313
Loans	15,307	23,455
Residential real estate | Financing Receivables, 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	667	1,296
Residential real estate | Financing Receivables, 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	15	57
Residential real estate | Financial Asset, Equal to or Greater than 90 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	0	0
Residential real estate | Financial Asset, Equal to or Greater than 90 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due	$ 0	$ 0