Note 7 - Derivatives and Hedging Activities - Significantly Impact of operations (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivative Assets	$ 222,220	$ 222,757
Derivative Liabilities.	225,135	229,270
Interest rate swap
Derivative Assets	221,055	222,431
Derivative Liabilities.	221,055	222,431
Non Designated | Interest rate swap
Derivative Asset, Notional Amount	2,024,599	1,495,251
Derivative Assets	221,055	222,431
Derivative Liability, Notional Amount	2,024,599	1,495,251
Derivative Liabilities.	$ 221,055	$ 222,431