Loans - Age Analysis of Past Due Loans and Nonaccrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Loans	$ 1,113,977	$ 968,814
Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	3,092	1,914
Nonaccrual Loans	11,074	9,179
Current Loans	974,548	836,007
Loans	988,714	847,100
Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	230	701
Nonaccrual Loans	385	0
Current Loans	124,648	121,013
Loans	125,263	121,714
30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	3,092	1,914
30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	230	701
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
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans	188,339	194,796
Residential real estate | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	1,117	1,296
Nonaccrual Loans	3,446	3,643
Current Loans	155,855	166,402
Loans	160,418	171,341
Residential real estate | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	102	57
Nonaccrual Loans	103	0
Current Loans	27,716	23,398
Loans	27,921	23,455
Residential real estate | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	1,117	1,296
Residential real estate | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	102	57
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	250,915	114,360
Commercial, financial, & agricultural | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	471	212
Nonaccrual Loans	1,841	1,628
Current Loans	233,550	89,695
Loans	235,862	91,535
Commercial, financial, & agricultural | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	553
Nonaccrual Loans	34	0
Current Loans	15,019	22,272
Loans	15,053	22,825
Commercial, financial, & agricultural | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	471	212
Commercial, financial, & agricultural | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	553
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	24,785	23,322
Consumer and other | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	85	21
Nonaccrual Loans	115	138
Current Loans	21,308	19,086
Loans	21,508	19,245
Consumer and other | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	7	8
Nonaccrual Loans	88	0
Current Loans	3,182	4,069
Loans	3,277	4,077
Consumer and other | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	85	21
Consumer and other | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	7	8
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
Construction, land and land development
Financing Receivable, Past Due [Line Items]
Loans	131,797	96,097
Other commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	518,141	540,239
Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Loans	649,938	636,336
Commercial Real Estate Portfolio Segment | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	1,419	385
Nonaccrual Loans	5,672	3,770
Current Loans	563,835	560,824
Loans	570,926	564,979
Commercial Real Estate Portfolio Segment | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	121	83
Nonaccrual Loans	160	0
Current Loans	78,731	71,274
Loans	79,012	71,357
Commercial Real Estate Portfolio Segment | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	1,419	385
Commercial Real Estate Portfolio Segment | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	121	83
Commercial Real Estate Portfolio Segment | 90 Days or More Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Commercial Real Estate Portfolio Segment | 90 Days or More Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	0
Commercial Real Estate Portfolio Segment | Construction, land and land development
Financing Receivable, Past Due [Line Items]
Loans	131,797	96,097
Commercial Real Estate Portfolio Segment | Construction, land and land development | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	27	50
Nonaccrual Loans	27	32
Current Loans	104,099	82,954
Loans	104,153	83,036
Commercial Real Estate Portfolio Segment | Construction, land and land development | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	121	0
Nonaccrual Loans	160	0
Current Loans	27,363	13,061
Loans	27,644	13,061
Commercial Real Estate Portfolio Segment | Construction, land and land development | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	27	50
Commercial Real Estate Portfolio Segment | Construction, land and land development | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	121	0
Commercial Real Estate Portfolio Segment | 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 Portfolio Segment | 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 Portfolio Segment | Other commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	518,141	540,239
Commercial Real Estate Portfolio Segment | Other commercial real estate | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	1,392	335
Nonaccrual Loans	5,645	3,738
Current Loans	459,736	477,870
Loans	466,773	481,943
Commercial Real Estate Portfolio Segment | Other commercial real estate | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	83
Nonaccrual Loans	0	0
Current Loans	51,368	58,213
Loans	51,368	58,296
Commercial Real Estate Portfolio Segment | Other commercial real estate | 30-89 Days Past Due | Legacy Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	1,392	335
Commercial Real Estate Portfolio Segment | Other commercial real estate | 30-89 Days Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due	0	83
Commercial Real Estate Portfolio Segment | 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 Portfolio Segment | Other commercial real estate | 90 Days or More Past Due | Purchased Loans
Financing Receivable, Past Due [Line Items]
Accruing Loans Past Due		$ 0