Note 5 - Premises, Equipment, Other Assets and Other Liabilities - Summary of Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Net deferred tax liability	$ 2,501	$ 25,778
Securities purchases pending settlement	0	29,000
Other liabilities	53,241	38,988
Total other liabilities	73,722	112,598
Other Liabilities [Member]
Operating lease liability	$ 17,980	$ 18,832