Loans and Allowance for Credit Losses - Loans outstanding by portfolio segment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Loans and Allowance for Loan Losses
Carrying amount	$ 2,799,475	$ 2,759,583
Deferred loan fees and costs	46,000	248,000
Accrued interest receivable	$ 12,300	$ 12,200
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Interest Receivable	Interest Receivable
MPB
Loans and Allowance for Loan Losses
Unearned discount	$ 4,700	$ 5,100
Commercial
Loans and Allowance for Loan Losses
Carrying amount	1,890,609	1,849,267
Consumer
Loans and Allowance for Loan Losses
Carrying amount	908,866	910,316
Commercial and industrial \| Commercial
Loans and Allowance for Loan Losses
Carrying amount	611,695	598,321
Real estate construction \| Commercial
Loans and Allowance for Loan Losses
Carrying amount	125,966	124,034
Residential \| Consumer \| Real estate first mortgage
Loans and Allowance for Loan Losses
Carrying amount	722,151	726,879
Residential \| Consumer \| Real estate junior lien
Loans and Allowance for Loan Losses
Carrying amount	156,882	154,134
Commercial real estate \| Commercial
Loans and Allowance for Loan Losses
Carrying amount	1,152,948	1,126,912
Other revolving and installment \| Consumer
Loans and Allowance for Loan Losses
Carrying amount	$ 29,833	$ 29,303

The amount of deferred loan fees and cost incurred during the reporting period.

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- Definition

Amount of unearned discount associated with acquisition of bank.

+ References

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+ References

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- Definition

Amount, after allowance for credit loss, of accrued interest on financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-5

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- Definition

Indicates line item in statement of financial position that includes accrued interest, after allowance for credit loss, on financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3A

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- 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/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

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-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B

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