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Note 2 - Business Combination - Schedule of PCD Loans Acquired (Details) - USD ($) $ in Thousands		6 Months Ended
	Jun. 01, 2025	Jun. 30, 2025
Unpaid principal balance		$ 237,841
First of Long Island Corporation [Member]
Unpaid principal balance	$ 271,904
Discount at acquisition	(34,394)
Allowance for credit losses at acquisition	(43,336)
Fair value of PCD loans	194,174
First of Long Island Corporation [Member] | Accruing [Member]
Unpaid principal balance	255,152
Discount at acquisition	(32,570)
Allowance for credit losses at acquisition	(38,231)
Fair value of PCD loans	184,351
First of Long Island Corporation [Member] | Nonaccrual Loans [Member]
Unpaid principal balance	16,752
Discount at acquisition	(1,824)
Allowance for credit losses at acquisition	(5,105)
Fair value of PCD loans	$ 9,823

X

- Definition

Amount of allowance for credit loss at acquisition date of 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 (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-19

+ Details

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Balance Type:	credit
Period Type:	duration

X

- Definition

Amount at par value of 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 (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-19

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X

- Definition

Amount at purchase price of 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 (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-19

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X

- 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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