Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Jan. 01, 2021
Operating Lease, Right-of-Use Asset	$ 22,451	$ 22,454
Operating Lease, Liability, Total	23,314	$ 23,282
Loans Held for Investment and Held for Sale, Gross	$ 3,000,000
Loans Held for Investment and Held for Sale, Gross, Percentage with a LIBOR-based Reference Rate	6.80%
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset			$ 26,800
Operating Lease, Liability, Total			$ 26,800