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Note 12 - Fair Value (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

(in thousands)

                       
   

Quoted Prices

                 
   

in Active

   

Significant

         
   

Markets for

   

Other

   

Significant

 
   

Identical

   

Observable

   

Unobservable

 
   

Assets

   

Inputs

   

Inputs

 
   

(Level 1)

   

(Level 2)

   

(Level 3)

 

June 30, 2023

                       

Mortgage-backed securities

  $ -     $ 4,373,972     $ -  

U.S. Treasury Notes

    37,195       -       -  

Interest rate swaps

    -       30,093       -  

Payer swaptions

    -       7,673       -  

Interest rate caps

    -       211       -  

Interest rate floors

          1,271        

TBA securities

    -       201       -  

December 31, 2022

                       

Mortgage-backed securities

  $ -     $ 3,540,002     $ -  

U.S. Treasury Notes

    36,382       -       -  

Interest rate swaps

    -       4,983       -  

Payer swaptions

    -       27,416       -  

Interest rate caps

    -       1,119       -  

TBA securities

    -       (507 )     -