Note 12 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Commitments To Extend Notional Amount	$ 3,297,362	$ 2,977,528
Commitments to Fund Fixed Rate Loans	111,400	59,900
Commitments to Fund Adjustable Rate Loans	$ 3,200,000	$ 2,900,000