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Note 16 - Segment Information - Reconciliation of Segment Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Assets	$ 5,157,040	$ 5,118,924
Operating Segments [Member]
Assets	5,158,140	5,121,216
Operating Segments [Member] | Trust Segment [Member]
Assets	16,193	17,204
Operating Segments [Member] | Bank Segment [Member]
Assets	5,141,947	5,104,012
Consolidation, Eliminations [Member]
Assets	$ (1,100)	$ (2,292)

X

- Definition

Amount of asset recognized for present right to economic benefit.

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