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Investment Securities
12 Months Ended
Dec. 31, 2025
Investment Securities [Abstract]  
Investment Securities
Note 2—Investment Securities

The amortized cost, fair values, and unrealized gains and losses of the securities available-for-sale are as follows:

         
Gross Unrealized
       
(Dollars in thousands)
 
Amortized
Cost
   
Gains
   
Losses
   
Fair Value
 
As of December 31, 2025
                       
U.S. Government-sponsored securities
 
$
2,046
   
$
2
   
$
10
   
$
2,038
 
Mortgage-backed securities(1)
   
834,820
     
9,140
     
17,720
     
826,240
 
Commercial mortgage-backed obligations(1)
   
1,231
     
22
     
-
     
1,253
 
Collateralized mortgage obligations(1)
   
21,087
     
5
     
362
     
20,730
 
Municipal securities
   
66,142
     
4,703
     
-
     
70,845
 
Corporate securities
   
29,567
     
171
     
-
     
29,738
 
Other
   
310
     
-
     
-
     
310
 
Total available-for-sale securities
 
$
955,203
   
$
14,043
   
$
18,092
   
$
951,154
 

(1) All mortgage-backed securities and collateralized mortgage obligations were issued by an agency or government sponsored entity of the U.S. Government.

         
Gross Unrealized
       
(Dollars in thousands)
 
Amortized
Cost
   
Gains
   
Losses
   
Fair Value
 
As of December 31, 2024
                       
U.S. Government-sponsored securities
 
$
2,657
   
$
4
   
$
17
   
$
2,644
 
Mortgage-backed securities(1)
   
466,302
     
464
     
26,908
     
439,858
 
Commercial mortgage-backed obligations(1)
   
1,228
     
-
     
16
     
1,212
 
Collateralized mortgage obligations(1)
   
5,653
     
-
     
156
     
5,497
 
Corporate securities
   
14,800
     
56
     
-
     
14,856
 
Other
   
352
     
-
     
5
     
347
 
Total available-for-sale securities
 
$
490,992
   
$
524
   
$
27,102
   
$
464,414
 

(1) All mortgage-backed securities and collateralized mortgage obligations were issued by an agency or government sponsored entity of the U.S. Government.

The book values, estimated fair values, and unrecognized gains and losses of investments classified as held-to-maturity are as follows:

         
Gross Unrecognized
         
Allowance
 
   
Amortized
   
         
for Credit
 
(Dollars in thousands)
 
Cost
   
Gains
   
Losses
   
Fair Value
   
Losses
 
As of December 31, 2025
                             
Mortgage-backed securities(1)
 
$
586,001
   
$
88
   
$
115,773
   
$
470,316
   
$
-
 
Collateralized mortgage obligations(1)
   
62,476
     
-
     
10,234
     
52,242
     
-
 
Municipal securities
   
70,164
     
1,011
     
997
     
70,178
     
450
 
Total held-to-maturity securities
 
$
718,641
   
$
1,099
   
$
127,004
   
$
592,736
   
$
450
 

(1) All mortgage-backed securities and collateralized mortgage obligations were issued by an agency or government sponsored entity of the U.S. Government.
                           
Allowance
 
   
Amortized
   
Gross Unrecognized
         
for Credit
 
(Dollars in thousands)
 
Cost
   
Gains
   
Losses
   
Fair Value
   
Losses
 
As of December 31, 2024
                             
Mortgage-backed securities(1)
 
$
626,427
   
$
-
   
$
143,544
   
$
482,883
   
$
-
 
Collateralized mortgage obligations(1)
   
68,377
     
-
     
13,876
     
54,501
     
-
 
Municipal securities
   
74,639
     
46
     
1,116
     
73,569
     
450
 
Total held-to-maturity securities
 
$
769,443
   
$
46
   
$
158,536
   
$
610,953
   
$
450
 

(1) All mortgage-backed securities and collateralized mortgage obligations were issued by an agency or government sponsored entity of the U.S. Government.

The allowance for credit losses on held-to-maturity securities is a contra-asset valuation account that is deducted from the amortized cost basis of held-to-maturity securities to present the net amount expected to be collected. Management measures expected credit losses on held-to-maturity securities on a collective basis by major security type with each type sharing similar risk characteristics, and considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. With regard to residential mortgage-backed securities issued by the U.S. government, or agencies thereof, it is expected that the securities will not be settled at prices less than the amortized cost basis of the securities as such securities are backed by the full faith and credit of and/or guaranteed by the U.S. government. Accordingly, no allowance for credit losses has been recorded for these securities. With regard to securities issued by States and political subdivisions and other held-to-maturity securities, management considers (i) issuer bond ratings, (ii) historical loss rates for given bond ratings, (iii) whether issuers continue to make timely principal and interest payments under the contractual terms of the securities, (iv) internal forecasts and (v) whether or not such securities are guaranteed or pre-refunded by the issuers.

Fair values are based on quoted market prices or dealer quotes. If a quoted market price or dealer quote is not available, fair value is estimated using quoted market prices for similar securities.

The following tables show the gross unrealized losses for available-for-sale securities, for which an allowance for credit losses has not been recorded, that have been in an unrealized loss position for less than 12 months or 12 months or more:

               
December 31, 2025
             
   
Less Than 12 Months
   
12 Months or More
   
Total
 
(Dollars in thousands)
 
Fair Value
   
Unrealized
Losses
   
Fair Value
   
Unrealized
Losses
   
Fair Value
   
Unrealized
Losses
 
Available-for-Sale Securities
                                   
U.S. Government-sponsored securities
 
$
461
   
$
2
   
$
676
   
$
8
   
$
1,137
   
$
10
 
Mortgage-backed securities(1)
   
60,935
     
244
     
75,647
     
17,476
     
136,582
     
17,720
 
Collateralized mortgage obligations(1)
   
13,262
     
230
     
5,511
     
132
     
18,773
     
362
 
Total available-for-sale securities
 
$
74,658
   
$
476
   
$
81,834
   
$
17,616
   
$
156,492
   
$
18,092
 

(1) All mortgage-backed securities and collateralized mortgage obligations were issued by an agency or government sponsored entity of the U.S. Government.
               
December 31, 2024
             
   
Less Than 12 Months
   
12 Months or More
   
Total
 
(Dollars in thousands)
 
Fair Value
   
Unrealized
Losses
   
Fair Value
   
Unrealized
Losses
   
Fair Value
   
Unrealized
Losses
 
Available-for-Sale Securities
                                   
U.S. Government-sponsored securities
 
$
600
   
$
1
   
$
888
   
$
16
   
$
1,488
   
$
17
 
Mortgage-backed securities(1)
   
324,202
     
5,772
     
67,319
     
21,136
     
391,521
     
26,908
 
Commerical mortgage-backed securities(1)
   
1,212
     
16
     
-
     
-
     
1,212
     
16
 
Collateralized mortgage obligations(1)
   
5,043
     
147
     
454
     
9
     
5,497
     
156
 
Other
   
347
     
5
     
-
     
-
     
347
     
5
 
Total available-for-sale securities
 
$
331,404
   
$
5,941
   
$
68,661
   
$
21,161
   
$
400,065
   
$
27,102
 

(1) All mortgage-backed securities and collateralized mortgage obligations were issued by an agency or government sponsored entity of the U.S. Government.

As of December 31, 2025, the Company held 324 available-for-sale securities of which 14 securities were in an unrealized loss position for less than twelve months and 104 securities were in an unrealized loss position for twelve months or more without an allowance for credit losses. Because the decline in fair value is attributable to changes in interest rates and not credit quality and because the Company does not have the intent to sell and it is likely that the Company will not be required to sell the securities prior to their anticipated recovery at maturity, it has been determined that there is no expected credit loss on these securities. Management evaluates the available-for-sale securities in an unrealized loss position, relying primarily on industry analyst reports and observations of market conditions and interest rate fluctuations.

The following tables present the activity in the allowance for credit losses for held-to-maturity securities by major type:

   
December 31, 2025
 
(Dollars in thousands)
 
Municipal
securities
   
Mortgage-backed
securities
   
Collateralized
mortgage
obligations
   
Total
 
Allowance for credit losses - securities
                       
Beginning balance
 
$
450
   
$
-
   
$
-
   
$
450
 
Provision for credit losses
   
-
     
-
     
-
     
-
 
Ending balance
 
$
450
   
$
-
   
$
-
   
$
450
 

   
December 31, 2024
 
(Dollars in thousands)
 
Municipal securities
   
Mortgage-backed securities
   
Collateralized
mortgage
obligations
   
Total
 
Allowance for credit losses - securities
                       
Beginning balance
 
$
450
   
$
-
   
$
-
   
$
450
 
Provision for credit losses
   
-
     
-
     
-
     
-
 
Ending balance
 
$
450
   
$
-
   
$
-
   
$
450
 
The amortized cost and estimated fair values of investment securities at December 31, 2025 by contractual final maturity are shown in the following table:

   
Available-for-Sale
   
Held-to-Maturity
 
(Dollars in thousands)
 
Amortized Cost
   
Fair Value
   
Amortized Cost
   
Fair Value
 
Securities maturing in:
                       
One year or less
 
$
5,670
   
$
5,672
   
$
1,918
   
$
1,911
 
After one year through five years
   
25,577
     
25,733
     
18,411
     
18,389
 
After five years through ten years
   
24,394
     
25,778
     
18,653
     
17,843
 
After ten years
   
899,562
     
893,971
     
679,659
     
554,593
 
Total
 
$
955,203
   
$
951,154
   
$
718,641
   
$
592,736
 

Maturities are based on the final contractual payment dates, and do not reflect the impact of contractual monthly principal payments, prepayments or early redemptions that may occur. Expected maturities of mortgage-backed and CMO securities may differ from contractual maturities because borrowers have the right to call or prepay obligations with or without call or prepayment penalties.

The Company monitors the credit quality of those held-to-maturity securities not issued by the U.S. government or one of its agencies or government sponsored entities, through the use of credit ratings. Credit ratings are reviewed and updated quarterly. Nonrated municipal investments consist primarily of bonds issued by political subdivisions such as housing authorities and reclamation districts. Nonrated municipal investments are monitored through financial covenants and review of repayment history. As of December 31, 2025, there were no past due principal or interest payments associated with held-to-maturity municipal securities. There were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of shareholders’ equity.

The following tables summarize the amortized cost of held-to-maturity municipal securities by credit rating as of the dates indicated:

   
Held-to-Maturity
       
   
Amortized Cost
       
(Dollars in thousands)
 
AAA/AA/A
   
BBB/BB/B
   
Not Rated
   
Total
 
December 31, 2025
                       
                         
Municipal securities
 
$
18,562
   
$
935
   
$
50,667
   
$
70,164
 
Total
 
$
18,562
   
$
935
   
$
50,667
   
$
70,164
 

   
Held-to-Maturity
       
   
Amortized Cost
       
(Dollars in thousands)
 
AAA/AA/A
   
BBB/BB/B
   
Not Rated
   
Total
 
December 31, 2024
                       
                         
Municipal securities
 
$
19,022
   
$
403
   
$
55,214
   
$
74,639
 
Total
 
$
19,022
   
$
403
   
$
55,214
   
$
74,639
 
During 2025, the Company sold securities with a book value of $24.8 million for a net gain of $44,287. Included in the sales were $3.2 million of securities that were in the held-to-maturity portfolio and were sold for a loss of $145,367 for the year ended December 31, 2025. All held-to-maturity securities sold were mortgage-backed securities with a remaining book value of less than 15% of the original principal balance at the time of purchase and, as allowed under ASC 320-10-25-14, the sales were considered maturities for purposes of security classification.

Proceeds from sales and calls of investment securities were as follows:

   
For the Year Ended December 31,
 
(Dollars in thousands)
 
2025
   
2024
   
2023
 
Gross proceeds
 
$
25,797
   
$
70,721
   
$
39,901
 
Gross gains
   
189
     
839
     
-
 
Gross losses
   
145
     
96
     
8,199
 

Pledged Securities

As of December 31, 2025, investment securities carried at $673.8 million were pledged to secure public deposits, Federal Home Loan Bank (“FHLB”) borrowings, and other government agency deposits as required by law. This amount was $712.5 million at December 31, 2024.