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Investment Securities (Tables) | 6 Months Ended
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Jun. 30, 2025
Investments, Debt and Equity Securities [Abstract] |
Summary of amortized cost and estimated fair value | The following summarizes the amortized cost and fair value of securities available-for-sale at June 30, 2025 and December 31, 2024 with gross unrealized gains and losses therein:
|  | June 30, 2025 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (In thousands) |
Available-for-sale |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities - U.S. government sponsored enterprises (GSEs) |  | $ | 175,736 |  |  | $ | 743 |  |  | $ | (6,033 | ) |  | $ | 170,445 |
U.S. government agency securities |  |  | 11,260 |  |  |  | 1 |  |  |  | (919 | ) |  |  | 10,341 |
Obligations of state and political subdivisions |  |  | 43,220 |  |  |  | 1 |  |  |  | (3,635 | ) |  |  | 39,587 |
Small business association (SBA) securities |  |  | 1,481 |  |  |  | 8 |  |  |  | (1 | ) |  |  | 1,487 |
U.S. treasury securities |  |  | 2,905 |  |  |  | — |  |  |  | (2 | ) |  |  | 2,903 |
Total |  | $ | 234,602 |  |  | $ | 753 |  |  | $ | (10,590 | ) |  | $ | 224,763 |
|  | December 31, 2024 |
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  |  |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
|  |  |  |  | (In thousands) |  |  |  |
Available -for-sale |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities - U.S. government sponsored enterprises (GSEs) |  | $ | 197,792 |  |  | $ | 422 |  |  | $ | (7,669 | ) |  | $ | 190,545 |
U.S. government agency securities |  |  | 11,260 |  |  |  | 17 |  |  |  | (1,077 | ) |  |  | 10,200 |
Obligations of state and political subdivisions |  |  | 43,895 |  |  |  | 1 |  |  |  | (4,166 | ) |  |  | 39,730 |
Small business association (SBA) securities |  |  | 1,856 |  |  |  | 5 |  |  |  | (4 | ) |  |  | 1,857 |
U.S. treasury securities |  |  | 4,855 |  |  |  | 1 |  |  |  | (17 | ) |  |  | 4,839 |
Total |  | $ | 259,658 |  |  | $ | 446 |  |  | $ | (12,933 | ) |  | $ | 247,171 |
Summary of fair value of related securities available-for-sale | The unrealized losses, categorized by the length of time of continuous loss position, and the fair value of related securities available-for-sale at June 30, 2025 and December 31, 2024 are as follows:
|  | Less than 12 Months |  |  | More than 12 Months |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
|  | (In thousands) |
June 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities - U.S. government sponsored enterprises (GSEs) |  | $ | 41,075 |  |  | $ | (278 | ) |  | $ | 28,055 |  |  | $ | (5,755 | ) |  | $ | 69,130 |  |  | $ | (6,033 | )
U.S. government agency securities |  |  | 4,879 |  |  |  | (60 | ) |  |  | 5,400 |  |  |  | (859 | ) |  |  | 10,279 |  |  |  | (919 | )
Obligations of state and political subdivisions |  |  | 2,205 |  |  |  | (4 | ) |  |  | 34,816 |  |  |  | (3,631 | ) |  |  | 37,021 |  |  |  | (3,635 | )
Small business association (SBA) securities |  |  | 165 |  |  |  | — |  |  |  | 85 |  |  |  | (1 | ) |  |  | 250 |  |  |  | (1 | )
U.S. Treasuries |  |  | 2,903 |  |  |  | (2 | ) |  |  | — |  |  |  | — |  |  |  | 2,903 |  |  |  | (2 | )
Total |  | $ | 51,227 |  |  | $ | (344 | ) |  | $ | 68,356 |  |  | $ | (10,246 | ) |  | $ | 119,583 |  |  | $ | (10,590 | )
|  | Less than 12 Months |  |  | More than 12 Months |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
|  | (In thousands) |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities - U.S. government sponsored enterprises (GSEs) |  | $ | 122,763 |  |  | $ | (1,157 | ) |  | $ | 29,229 |  |  | $ | (6,512 | ) |  | $ | 151,992 |  |  | $ | (7,669 | )
U.S. government agency securities |  |  | 129 |  |  |  | — |  |  |  | 5,183 |  |  |  | (1,077 | ) |  |  | 5,312 |  |  |  | (1,077 | )
Obligations of state and political subdivisions |  |  | 3,664 |  |  |  | (39 | ) |  |  | 34,320 |  |  |  | (4,127 | ) |  |  | 37,984 |  |  |  | (4,166 | )
Small business association (SBA) securities |  |  | 447 |  |  |  | (1 | ) |  |  | 449 |  |  |  | (3 | ) |  |  | 896 |  |  |  | (4 | )
U.S. Treasuries |  |  | 2,846 |  |  |  | (17 | ) |  |  | — |  |  |  | — |  |  |  | 2,846 |  |  |  | (17 | )
|  | $ | 129,849 |  |  | $ | (1,214 | ) |  | $ | 69,181 |  |  | $ | (11,719 | ) |  | $ | 199,030 |  |  | $ | (12,933 | )
Summary of securities available-for-sale by contractual maturity | The amortized cost and fair value of securities available-for-sale at June 30, 2025 by contractual maturity are shown below. Expected maturities will differ from contractual maturities as borrowers may have the right to call or prepay obligations with or without call or prepayment penalties:
|  | Amortized |  |  |  |
|  | Cost |  |  | Fair Value |
|  | (In thousands) |
Due in one year or less |  | $ | 2,122 |  |  | $ | 2,122 |
Due after one year through five years |  |  | 9,427 |  |  |  | 9,334 |
Due after five years through ten years |  |  | 41,975 |  |  |  | 38,369 |
Due after ten years |  |  | 5,342 |  |  |  | 4,493 |
Mortgage-backed securities (GSEs) |  |  | 175,736 |  |  |  | 170,445 |
|  | $ | 234,602 |  |  | $ | 224,763 |

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