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Loans and Allowance for Loan Losses - Past due aging analysis (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Past due aging analysis of loans
Accruing Current	$ 1,826,085	$ 1,969,285
Nonaccrual	6,960	5,050
Loans and Leases Receivable, Gross, Total	1,835,312	1,979,375
30 - 89 Days Past Due
Past due aging analysis of loans
Past due	2,267	5,010
90 Days or More Past Due
Past due aging analysis of loans
Past due		30
Commercial
Past due aging analysis of loans
Accruing Current	1,170,357	1,291,918
Nonaccrual	6,601	4,419
Loans and Leases Receivable, Gross, Total	1,177,270	1,299,316
Commercial | 30 - 89 Days Past Due
Past due aging analysis of loans
Past due	312	2,949
Commercial | 90 Days or More Past Due
Past due aging analysis of loans
Past due		30
Commercial | Commercial and industrial
Past due aging analysis of loans
Accruing Current	570,287	689,340
Nonaccrual	2,135	1,988
Loans and Leases Receivable, Gross, Total	572,734	691,858
Commercial | Commercial and industrial | 30 - 89 Days Past Due
Past due aging analysis of loans
Past due	312	500
Commercial | Commercial and industrial | 90 Days or More Past Due
Past due aging analysis of loans
Past due		30
Commercial | Real estate construction
Past due aging analysis of loans
Accruing Current	36,549	44,451
Loans and Leases Receivable, Gross, Total	36,549	44,451
Commercial | Commercial real estate
Past due aging analysis of loans
Accruing Current	563,521	558,127
Nonaccrual	4,466	2,431
Loans and Leases Receivable, Gross, Total	567,987	563,007
Commercial | Commercial real estate | 30 - 89 Days Past Due
Past due aging analysis of loans
Past due		2,449
Consumer
Past due aging analysis of loans
Accruing Current	655,728	677,367
Nonaccrual	359	631
Loans and Leases Receivable, Gross, Total	658,042	680,059
Consumer | 30 - 89 Days Past Due
Past due aging analysis of loans
Past due	1,955	2,061
Consumer | Residential | Real estate first mortgage
Past due aging analysis of loans
Accruing Current	469,273	461,179
Nonaccrual	23	439
Loans and Leases Receivable, Gross, Total	470,822	463,370
Consumer | Residential | Real estate first mortgage | 30 - 89 Days Past Due
Past due aging analysis of loans
Past due	1,526	1,752
Consumer | Residential | Real estate junior lien
Past due aging analysis of loans
Accruing Current	129,698	143,060
Nonaccrual	323	165
Loans and Leases Receivable, Gross, Total	130,180	143,416
Consumer | Residential | Real estate junior lien | 30 - 89 Days Past Due
Past due aging analysis of loans
Past due	159	191
Consumer | Other revolving and installment
Past due aging analysis of loans
Accruing Current	56,757	73,128
Nonaccrual	13	27
Loans and Leases Receivable, Gross, Total	57,040	73,273
Consumer | Other revolving and installment | 30 - 89 Days Past Due
Past due aging analysis of loans
Past due	$ 270	$ 118

X

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