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Note 2 - Business Combination - Pro Forma Information (Details) - First of Long Island Corporation [Member] - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Net interest income	$ 300,771	$ 262,608
Net income	$ 104,766	$ 58,690

X

- Definition

The pro forma net interest income for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

No definition available.

+ Details

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X

- Definition

Amount, after tax, of pro forma income (loss) of combined entity as if acquisition date of business combination occurred as of beginning of period.

+ References

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