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Note 2 - Business Combination (Details Textual) - First of Long Island Corporation [Member] $ / shares in Units, $ in Millions	Sep. 04, 2024 USD ($) $ / shares
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 14,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans	11,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits	$ 11,000
Business Acquisition, Equity Interest Issued or Issuable, Share Exchange Ratio	0.5175
Business Combination, Consideration Transferred	$ 288
Share Price (in dollars per share) | $ / shares	$ 24.31

X

- Definition

Represents the ratio of shares exchanged as part of a business acquisition.

+ References

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X

- Definition

Amount of deposits acquired at acquisition date.

+ References

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X

- Definition

Amount of loans assumed at the acquisition date.

+ References

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X

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
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- Definition

Amount of asset acquired in business combination and recognized at acquisition date.

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- Definition

Price of a single share of a number of saleable stocks of a company.

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