Note 27 - Segments (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Mar. 07, 2022	Dec. 31, 2021
Goodwill, Ending Balance	$ 194,074	$ 194,074	$ 194,074		$ 135,830
Goodwill, Written off Related to Sale of Business Unit	(0)	(0)	8,450
Commonwealth [Member]
Goodwill, Ending Balance	58,244	58,244
Commercial Banking [Member]
Goodwill, Ending Balance	172,000	172,000
WM&T [Member]
Goodwill, Ending Balance	22,000	22,000
Investment Management and Trust [Member]
Assets under Management, Carrying Amount	7,070,000	$ 7,160,000	$ 6,590,000
Operating Segments [Member] | Commercial Banking [Member]
Goodwill, Ending Balance	172,000
Operating Segments [Member] | WM&T [Member]
Goodwill, Ending Balance	$ 22,000
Operating Segments [Member] | WM&T [Member] | Commonwealth [Member]
Goodwill, Ending Balance				$ 67,000