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Loans and Allowance for Loan Losses - Past due aging analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Past due aging analysis of loans
Loans	$ 2,486,625	$ 2,443,994
Nonaccrual	2,118	3,794
30 - 89 Days Past Due
Past due aging analysis of loans
Loans	1,785	4,963
Current
Past due aging analysis of loans
Loans	2,482,722	2,435,237
Commercial
Past due aging analysis of loans
Loans	1,596,678	1,563,356
Nonaccrual	1,693	3,074
Commercial | 30 - 89 Days Past Due
Past due aging analysis of loans
Loans	462	2,794
Commercial | Current
Past due aging analysis of loans
Loans	1,594,523	1,557,488
Commercial | Commercial and industrial
Past due aging analysis of loans
Loans	553,578	583,876
Nonaccrual	357	1,162
Commercial | Commercial and industrial | 30 - 89 Days Past Due
Past due aging analysis of loans
Loans	300	2,426
Commercial | Commercial and industrial | Current
Past due aging analysis of loans
Loans	552,921	580,288
Commercial | Real estate construction
Past due aging analysis of loans
Loans	108,776	97,810
Nonaccrual	440	440
Commercial | Real estate construction | Current
Past due aging analysis of loans
Loans	108,336	97,370
Commercial | Commercial real estate
Past due aging analysis of loans
Loans	934,324	881,670
Nonaccrual	896	1,472
Commercial | Commercial real estate | 30 - 89 Days Past Due
Past due aging analysis of loans
Loans	162	368
Commercial | Commercial real estate | Current
Past due aging analysis of loans
Loans	933,266	879,830
Consumer
Past due aging analysis of loans
Loans	889,947	880,638
Nonaccrual	425	720
Consumer | 30 - 89 Days Past Due
Past due aging analysis of loans
Loans	1,323	2,169
Consumer | Current
Past due aging analysis of loans
Loans	888,199	877,749
Consumer | Residential | Real estate first mortgage
Past due aging analysis of loans
Loans	698,002	679,551
Nonaccrual	424	535
Consumer | Residential | Real estate first mortgage | 30 - 89 Days Past Due
Past due aging analysis of loans
Loans	566	1,545
Consumer | Residential | Real estate first mortgage | Current
Past due aging analysis of loans
Loans	697,012	677,471
Consumer | Residential | Real estate junior lien
Past due aging analysis of loans
Loans	152,281	150,479
Nonaccrual		184
Consumer | Residential | Real estate junior lien | 30 - 89 Days Past Due
Past due aging analysis of loans
Loans	578	377
Consumer | Residential | Real estate junior lien | Current
Past due aging analysis of loans
Loans	151,703	149,918
Consumer | Other revolving and installment
Past due aging analysis of loans
Loans	39,664	50,608
Nonaccrual	1	1
Consumer | Other revolving and installment | 30 - 89 Days Past Due
Past due aging analysis of loans
Loans	179	247
Consumer | Other revolving and installment | Current
Past due aging analysis of loans
Loans	$ 39,484	$ 50,360

X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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