Loans - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
2021	$ 644,847
2020	781,780
2019	344,893
2018	246,720
2017	166,154
Prior	329,865
Revolving Loans Amortized Cost Basis	140,492
Revolving Loan Converted to Term	0
Total	2,654,751	$ 2,595,030	$ 2,592,455
Total Loans	2,627,795	2,565,798	2,564,009
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	85,489
2020	44,118
2019	14,653
2018	12,860
2017	8,542
Prior	9,711
Revolving Loans Amortized Cost Basis	12,818
Revolving Loan Converted to Term	0
Total	188,191
Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2021	103,667
2020	317,973
2019	52,782
2018	41,361
2017	22,800
Prior	73,563
Revolving Loans Amortized Cost Basis	2,935
Revolving Loan Converted to Term	0
Total	615,081
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	331,155
2020	265,282
2019	175,780
2018	97,723
2017	37,142
Prior	13,630
Revolving Loans Amortized Cost Basis	477
Revolving Loan Converted to Term	0
Total	921,189	859,768	849,526
Mortgage loans in process of foreclosure, amount	1,300
Residential
Financing Receivable, Credit Quality Indicator [Line Items]
2021	124,536
2020	154,407
2019	101,678
2018	94,776
2017	97,670
Prior	232,961
Revolving Loans Amortized Cost Basis	124,262
Revolving Loan Converted to Term	0
Total	930,290	922,921	925,775
Satisfactory
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans		754,960	758,076
Satisfactory | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	81,914
2020	38,970
2019	13,966
2018	12,860
2017	8,511
Prior	3,917
Revolving Loans Amortized Cost Basis	12,796
Revolving Loan Converted to Term	0
Total	172,934
Total Loans		229,351	264,094
Satisfactory | Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2021	96,419
2020	290,785
2019	47,605
2018	41,215
2017	22,661
Prior	62,203
Revolving Loans Amortized Cost Basis	2,935
Revolving Loan Converted to Term	0
Total	563,823
Total Loans		525,609	493,982
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans		17,787	14,105
Special Mention | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	652
2019	51
2018	0
2017	0
Prior	5,499
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	6,202
Total Loans		1,574	1,485
Special Mention | Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	16,829
2019	1,227
2018	0
2017	139
Prior	1,976
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	20,171
Total Loans		16,213	12,620
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans		39,594	44,973
Substandard | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	3,575
2020	4,496
2019	636
2018	0
2017	31
Prior	295
Revolving Loans Amortized Cost Basis	22
Revolving Loan Converted to Term	0
Total	9,055
Total Loans		9,629	10,342
Substandard | Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2021	7,248
2020	10,359
2019	3,950
2018	146
2017	0
Prior	9,384
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	31,087
Total Loans		29,965	34,631
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans		0	0
Doubtful | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	0
Total Loans		0	0
Doubtful | Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	0
Total Loans		0	0
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans		1,778,165	1,770,723
Performing | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	330,952
2020	264,963
2019	175,448
2018	97,563
2017	37,112
Prior	13,572
Revolving Loans Amortized Cost Basis	477
Revolving Loan Converted to Term	0
Total	920,087
Total Loans		858,298	847,967
Performing | Residential
Financing Receivable, Credit Quality Indicator [Line Items]
2021	124,536
2020	154,071
2019	101,678
2018	94,621
2017	97,457
Prior	231,375
Revolving Loans Amortized Cost Basis	124,231
Revolving Loan Converted to Term	0
Total	927,969
Total Loans		919,867	922,756
Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans		4,524	4,578
Nonperforming | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	203
2020	319
2019	332
2018	160
2017	30
Prior	58
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	1,102
Total Loans		1,470	1,559
Nonperforming | Residential
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	336
2019	0
2018	155
2017	213
Prior	1,586
Revolving Loans Amortized Cost Basis	31
Revolving Loan Converted to Term	0
Total	$ 2,321
Total Loans		$ 3,054	$ 3,019