Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Securities (Tables)

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Note 4 - Securities (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Unrealized Gain (Loss) on Investments [Table Text Block]
           

Gross

   

Gross

         
   

Amortized

   

Unrealized

   

Unrealized

   

Market

 
   

Cost

   

Gain

   

Loss

   

Value

 

March 31, 2024

 

(In Thousands)

 

Debt Securities Available-for-Sale

                               

U.S. Treasury Securities

  $ 494,156     $ 10     $ (197 )   $ 493,969  

Mortgage-backed securities

    281,343       249       (26,677 )     254,915  

State and municipal securities

    11,142       1       (1,186 )     9,958  

Corporate debt

    352,684       60       (37,657 )     315,086  

Total

  $ 1,139,325     $ 320     $ (65,716 )   $ 1,073,929  

Debt Securities Held-to-Maturity

                               

U.S. Treasury Securities

  $ 393,932     $ -     $ (25,065 )   $ 368,868  

Mortgage-backed securities

    465,695       5       (56,634 )     409,066  

State and municipal securities

    8,069       -       (733 )     7,336  

Total

  $ 867,696     $ 5     $ (82,431 )   $ 785,270  
                                 

December 31, 2023

                               

Debt Securities Available-for-Sale

                               

U.S. Treasury Securities

  $ 340,556     $ 251     $ -     $ 340,807  

Mortgage-backed securities

    241,458       6       (25,979 )     215,485  

State and municipal securities

    11,400       1       (1,178 )     10,223  

Corporate debt

    375,676       -       (42,009 )     333,667  

Total

  $ 969,090     $ 258     $ (69,166 )   $ 900,183  

Debt Securities Held-to-Maturity

                               

U.S. Treasury Securities

  $ 508,985     $ -     $ (24,718 )   $ 484,267  

Mortgage-backed securities

    465,615       3       (50,025 )     415,593  

State and municipal securities

    8,063       -       (732 )     7,331  

Total

  $ 982,664     $ 3     $ (75,475 )   $ 907,191  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
   

March 31, 2024

   

December 31, 2023

 
   

Amortized Cost

   

Market Value

   

Amortized Cost

   

Market Value

 
   

(In Thousands)

 

Debt securities available-for-sale

                               

Due within one year

  $ 430,857     $ 430,760     $ 350,400     $ 350,396  

Due from one to five years

    132,967       129,779       70,016       67,334  

Due from five to ten years

    291,157       256,407       304,216       264,893  

Due after ten years

    3,000       2,068       3,000       2,076  

Mortgage-backed securities

    281,343       254,915       241,458       215,485  
    $ 1,139,325     $ 1,073,929     $ 969,090     $ 900,183  
                                 

Debt securities held-to-maturity

                               

Due within one year

  $ 144,940     $ 144,283     $ 260,047     $ 257,835  

Due from one to five years

    253,772       229,043       203,481       185,741  

Due from five to ten years

    3,289       2,878       53,521       48,022  

Mortgage-backed securities

    465,695       409,066       465,615       415,593  
    $ 867,696     $ 785,270     $ 982,664     $ 907,191  
Gain (Loss) on Securities [Table Text Block]
   

Less Than Twelve Months

   

Twelve Months or More

   

Total

 
   

Gross

           

Gross

           

Gross

         
   

Unrealized

           

Unrealized

           

Unrealized

         
   

Losses

   

Fair Value

   

Losses

   

Fair Value

   

Losses

   

Fair Value

 
   

(In Thousands)

 

March 31, 2024

                                               

Debt Securities available-for-sale

                                               

U.S. Treasury Securities

  $ (197 )   $ 479,762     $ -     $ -     $ (197 )   $ 479,762  

Government Agency Securities

    -       -       -       -       -       -  

Mortgage-backed securities

    (2 )     161       (26,674 )     205,195       (26,677 )     205,356  

State and municipal securities

    -       -       (1,186 )     9,512       (1,186 )     9,512  

Corporate debt

    (2,392 )     11,108       (35,265 )     294,003       (37,657 )     305,111  

Total

  $ (2,591 )   $ 491,031     $ (63,125 )   $ 508,710     $ (65,716 )   $ 999,741  

Debt Securities held-to-maturity

                                               

U.S. Treasury Securities

  $ -     $ -     $ (25,065 )   $ 368,868     $ (25,065 )   $ 368,868  

Mortgage-backed securities

    (162 )     9,895       (56,471 )     393,887       (56,634 )     405,323  

State and municipal securities

    -       -       (733 )     7,086       (733 )     7,086  

Total

  $ (162 )   $ 9,895     $ (82,269 )   $ 771,382     $ (82,431 )   $ 779,735  

December 31, 2023

                                               

Debt Securities available-for-sale

                                               

Mortgage-backed securities

  $ (6 )   $ 704     $ (25,973 )   $ 214,393     $ (25,979 )   $ 215,097  

State and municipal securities

    -       -       (1,178 )     9,777       (1,178 )     9,777  

Corporate debt

    (794 )     15,141       (41,214 )     311,666       (42,009 )     326,807  

Total

  $ (801 )   $ 15,845     $ (68,365 )   $ 535,836     $ (69,166 )   $ 551,681  

Debt Securities held-to-maturity

                                               

U.S. Treasury Securities

  $ -     $ -     $ (24,718 )   $ 484,267     $ (24,718 )   $ 484,267  

Mortgage-backed securities

    (1 )     430       (50,024 )     411,585       (50,025 )     412,015  

State and municipal securities

    -       -       (732 )     7,081       (732 )     7,081  

Total

  $ (1 )   $ 430     $ (75,474 )   $ 902,933     $ (75,475 )   $ 903,363