Note 7 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill	$ 375,696	$ 375,696
Goodwill, Impairment Loss	0	0
Impairment of Intangible Assets, Finite-Lived	0	100	$ 300
Amortization of Intangible Assets	946	1,098	$ 1,310
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]			Amortization of Intangible Assets
Core Deposits [Member]
Amortization of Intangible Assets	$ 900	$ 1,100	$ 1,300