Note 8 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Feb. 07, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill, Ending Balance		$ 375,696	$ 372,189
Amortization of Intangible Assets		1,892	687	$ 687
Core Deposits [Member]
Amortization of Intangible Assets		1,900	687	687
Core Deposits [Member] | Amortization of Core Deposit Intangibles [Member]
Impairment of Intangible Assets, Finite-Lived		918	$ 0	$ 0
HSBC Bank USA West Coast Mass Market Consumer and Retail Banking Business [Member]
Goodwill, Ending Balance	$ 3,507
Goodwill, Acquired During Period	$ 3,500
HSBC Bank USA West Coast Mass Market Consumer and Retail Banking Business [Member] | Core Deposits [Member]
Finite-Lived Intangible Assets Acquired		$ 3,100