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Loans, net and allowance for credit losses -Purchased credit deteriorated (PCD) loans (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Jul. 01, 2024	Sep. 30, 2024	Sep. 30, 2024
Financial Asset Acquired with Credit Deterioration [Member]
Accounts, Notes, Loans and Financing Receivable
PCD Allowance for Credit Losses at Acquisition		$ 1,841	$ 1,841
Financial Asset Acquired with Credit Deterioration [Member] | FNCB
Accounts, Notes, Loans and Financing Receivable
Unpaid Principal Balance	$ 106,321
Non-credit Discount at Acquisition	(6,524)
PCD Allowance for Credit Losses at Acquisition	1,841
Fair Value of PCD Loans at Acquisition	101,638
PCD accruing | FNCB
Accounts, Notes, Loans and Financing Receivable
Unpaid Principal Balance	95,851
Non-credit Discount at Acquisition	(3,626)
PCD Allowance for Credit Losses at Acquisition	1,841
Fair Value of PCD Loans at Acquisition	94,066
PCD nonaccruing | FNCB
Accounts, Notes, Loans and Financing Receivable
Unpaid Principal Balance	10,470
Non-credit Discount at Acquisition	(2,898)
Fair Value of PCD Loans at Acquisition	$ 7,572

X

- Definition

Amount of unpaid principal balance of financing receivables excluding accrued interest with related allowance for credit losses and without related allowance for credit losses.

+ References

No definition available.

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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Fair value of acquired receivable from business combination, excluding certain loans and debt securities acquired in transfer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-1

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- Definition

Amount, excluding accrued interest, of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 19
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-19

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amount of discount (premium) attributable to other factors on financing receivable purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 19
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-19

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