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Note 3 - Investment Securities (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Marketable Securities [Table Text Block]
           

Gross

   

Gross

         
   

Amortized

   

Unrealized

   

Unrealized

   

Fair

 

(In thousands)

 

Cost

   

Gains

   

Losses

   

Value

 
                                 

September 30, 2024

                               

Securities available for sale:

                               

Agency mortgage-backed securities

  $ 72,785     $ 42     $ 6,315     $ 66,512  

Agency CMO

    52,335       199       222       52,312  

Other debt securities:

                               

Agency notes and bonds

    126,601       135       4,901       121,835  

Treasury notes and bonds

    34,781       -       398       34,383  

Municipal obligations

    145,903       598       13,074       133,427  
                                 

Total securities available for sale

  $ 432,405     $ 974     $ 24,910     $ 408,469  
                                 

Securities held to maturity:

                               

Other debt securities:

                               

Corporate notes

  $ 7,000     $ -     $ 2,312     $ 4,688  
                                 

Total securities held to maturity

  $ 7,000     $ -     $ 2,312     $ 4,688  
                                 

December 31, 2023

                               

Securities available for sale:

                               

Agency mortgage-backed securities

  $ 81,166     $ -     $ 9,122     $ 72,044  

Agency CMO

    25,402       94       323       25,173  

Other debt securities:

                               

Agency notes and bonds

    138,174       38       8,707       129,505  

Treasury notes and bonds

    64,758       -       1,674       63,084  

Municipal obligations

    159,049       655       12,239       147,465  
                                 

Total securities available for sale

  $ 468,549     $ 787     $ 32,065     $ 437,271  
                                 

Securities held to maturity:

                               

Other debt securities:

                               

Corporate notes

  $ 7,000     $ -     $ 2,554     $ 4,446  
                                 

Total securities held to maturity

  $ 7,000     $ -     $ 2,554     $ 4,446  
Investments Classified by Contractual Maturity Date [Table Text Block]
   

Securities Available for Sale

   

Securities Held to Maturity

 
   

Amortized

   

Fair

   

Amortized

   

Fair

 
   

Cost

   

Value

   

Cost

   

Value

 

(In thousands)

                               
                                 

Due in one year or less

  $ 60,809     $ 59,782     $ -     $ -  

Due after one year through five years

    123,645       118,416       -       -  

Due after five years through ten years

    52,663       49,010       2,000       1,354  

Due after ten years

    70,168       62,437       5,000       3,334  
      307,285       289,645       7,000       4,688  

Mortgage-backed securities and CMO

    125,120       118,824       -       -  
                                 
    $ 432,405     $ 408,469     $ 7,000     $ 4,688  
Unrealized Gain (Loss) on Investments [Table Text Block]
   

Number of

           

Gross

 
   

Investment

   

Fair

   

Unrealized

 
   

Positions

   

Value

   

Losses

 

(Dollars in thousands)

                       
                         

September 30, 2024:

                       

Securities available for sale:

                       

Continuous loss position less than twelve months:

                       

Agency CMO

    3     $ 11,844     $ 38  

Muncipal obligations

    13       6,970       153  

Total less than twelve months

    16       18,814       191  
                         

Continuous loss position more than twelve months:

                       

Agency mortgage-backed securities

    94       65,069       6,315  

Agency CMO

    22       8,315       184  

Agency notes and bonds

    47       115,349       4,901  

Treasury notes and bonds

    13       34,383       398  

Muncipal obligations

    186       101,063       12,921  

Total more than twelve months

    362       324,179       24,719  
                         

Total securities available for sale

    378     $ 342,993     $ 24,910  
                         

Securities held to maturity:

                       

Continuous loss position more than twelve months:

                       

Corporate notes

    4     $ 4,688     $ 2,312  

Total more than twelve months

    4       4,688       2,312  
                         

Total securities held to maturity

    4     $ 4,688     $ 2,312  
   

Number of

           

Gross

 
   

Investment

   

Fair

   

Unrealized

 
   

Positions

   

Value

   

Losses

 

(Dollars in thousands)

                       
                         

December 31, 2023:

                       

Securities available for sale:

                       

Continuous loss position less than twelve months:

                       

Agency CMO

    3     $ 8,019     $ 30  

Agency notes and bonds

    3       2,754       12  

Muncipal obligations

    74       32,124       2,405  

Total less than twelve months

    80       42,897       2,447  
                         

Continuous loss position more than twelve months:

                       

Agency mortgage-backed securities

    96       72,044       9,122  

Agency CMO

    22       4,998       293  

Agency notes and bonds

    52       123,416       8,695  

Treasury notes and bonds

    21       63,084       1,674  

Muncipal obligations

    130       79,643       9,834  

Total more than twelve months

    321       343,185       29,618  
                         

Total securities available for sale

    401     $ 386,082     $ 32,065  
                         

Securities held to maturity:

                       

Continuous loss position more than twelve months:

                       

Corporate notes

    4     $ 4,446     $ 2,554  

Total more than twelve months

    4       4,446       2,554  
                         

Total securities held to maturity

    4     $ 4,446     $ 2,554