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Note 22 - Segments (Details Textual) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2024 USD ($)
Number of Reportable Segments	2
Goodwill	$ 194,074		$ 194,074
Goodwill, Written off Related to Sale of Business Unit		$ 8,500
Commonwealth [Member]
Goodwill	58,244		58,244
Commercial Banking [Member]
Goodwill	172,000		172,000
WM&T [Member]
Goodwill	22,000		22,000
Investment Management and Trust [Member]
Assets under Management, Carrying Amount	7,480,000		$ 7,070,000
Operating Segments [Member] | Commercial Banking [Member]
Goodwill	172,000
Operating Segments [Member] | WM&T [Member]
Goodwill	22,000
Operating Segments [Member] | WM&T [Member] | Commonwealth [Member]
Goodwill	$ 67,000

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