Loans - Nonperforming Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 3,371,789	$ 2,809,197
1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2020	16,081
2019	11,547
2018	140
2017	0
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	27,768
Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2020	19,764
2019	12,823
2018	12,842
2017	9,095
2016	8,215
Prior	42,864
Revolving Loans Amortized Cost Basis	3,841
Revolving Loans Converted to Term	0
Loans	109,444
Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
2020	211,910
2019	136,265
2018	94,475
2017	99,663
2016	62,373
Prior	166,817
Revolving Loans Amortized Cost Basis	5,527
Revolving Loans Converted to Term	0
Loans	777,030
Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
2020	14,552
2019	12,255
2018	7,031
2017	5,660
2016	3,366
Prior	10,484
Revolving Loans Amortized Cost Basis	378
Revolving Loans Converted to Term	0
Loans	53,726
Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	4,088
2019	4,516
2018	3,324
2017	3,149
2016	1,301
Prior	9,129
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	25,507
Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
2020	8,965
2019	8,599
2018	4,652
2017	1,641
2016	764
Prior	723
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	25,344
Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	24,939
2019	11,447
2018	3,654
2017	809
2016	218
Prior	1,724
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	42,792
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans		$ 124,785
Farmland
Financing Receivable, Credit Quality Indicator [Line Items]
2020	2,773
2019	4,448
2018	3,767
2017	3,699
2016	1,476
Prior	6,491
Revolving Loans Amortized Cost Basis	662
Revolving Loans Converted to Term	0
Loans	23,316
Farmland | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,617
2019	4,448
2018	3,767
2017	3,648
2016	894
Prior	5,280
Revolving Loans Amortized Cost Basis	662
Revolving Loans Converted to Term	0
Performing | 1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2020	16,081
2019	11,547
2018	140
2017	0
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	27,768
Performing | Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2020	19,764
2019	12,823
2018	12,842
2017	8,793
2016	8,182
Prior	42,514
Revolving Loans Amortized Cost Basis	3,841
Revolving Loans Converted to Term	0
Loans	108,759
Performing | Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
2020	211,910
2019	136,181
2018	93,588
2017	99,520
2016	62,312
Prior	163,556
Revolving Loans Amortized Cost Basis	5,505
Revolving Loans Converted to Term	0
Loans	772,572
Performing | Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
2020	14,552
2019	12,255
2018	7,031
2017	5,660
2016	3,347
Prior	10,389
Revolving Loans Amortized Cost Basis	378
Revolving Loans Converted to Term	0
Loans	53,612
Performing | Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	4,088
2019	4,516
2018	3,320
2017	3,149
2016	1,301
Prior	9,127
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	25,501
Performing | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
2020	8,965
2019	8,595
2018	4,652
2017	1,635
2016	764
Prior	701
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	25,312
Performing | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	24,857
2019	11,183
2018	3,579
2017	796
2016	218
Prior	1,654
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	42,288
Nonperforming | 1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	0
Nonperforming | Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	302
2016	33
Prior	350
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	685
Nonperforming | Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	84
2018	887
2017	143
2016	61
Prior	3,261
Revolving Loans Amortized Cost Basis	22
Revolving Loans Converted to Term	0
Loans	4,458
Nonperforming | Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	19
Prior	95
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	114
Nonperforming | Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	4
2017	0
2016	0
Prior	2
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	6
Nonperforming | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	4
2018	0
2017	6
2016	0
Prior	22
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	32
Nonperforming | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	82
2019	264
2018	75
2017	13
2016	0
Prior	70
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Loans	$ 504