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v3.25.4

Investment Securities (Tables) | 12 Months Ended
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Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract] |
Schedule of Investment Securities Available-for-sale | The following tables set forth investment securities available-for-sale at the dates indicated:
| At December 31, 2025
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
| (In Thousands)
Investment securities available-for-sale: |  |  |  |  |  |  |
GSE debentures | $ | 185,449 |  |  | $ | 512 |  |  | $ | 12,284 |  |  | $ | 173,677 |
GSE CMOs | 500,446 |  |  | 2,784 |  |  | 6,660 |  |  | 496,570 |
GSE MBSs | 334,476 |  |  | 3,009 |  |  | 11,740 |  |  | 325,745 |
Municipal obligations | 231,924 |  |  | 8,305 |  |  | 13 |  |  | 240,216 |
Corporate debt obligations | 39,209 |  |  | 863 |  | 49 |  |  | 40,023 |
U.S. Treasury bonds | 424,214 |  |  | 1,727 |  |  | 13,904 |  |  | 412,037 |
Foreign government obligations | 500 |  |  | — |  |  | — |  |  | 500 |
Total investment securities available-for-sale | $ | 1,716,218 |  |  | $ | 17,200 |  |  | $ | 44,650 |  |  | $ | 1,688,768 |
| At December 31, 2024
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
| (In Thousands)
Investment securities available-for-sale: |  |  |  |  |  |  |
GSE debentures | $ | 195,099 |  |  | $ | 225 |  |  | $ | 19,030 |  |  | $ | 176,294 |
GSE CMOs | 62,567 |  |  | 4 |  |  | 7,028 |  |  | 55,543 |
GSE MBSs | 166,843 |  |  | 63 |  |  | 18,621 |  |  | 148,285 |
Municipal obligations | 20,526 |  |  | 19 |  |  | 291 |  |  | 20,254 |
Corporate debt obligations | 12,140 |  |  | 225 |  |  | 78 |  |  | 12,287 |
U.S. Treasury bonds | 506,714 |  |  | 331 |  |  | 25,173 |  |  | 481,872 |
Foreign government obligations | 500 |  |  | — |  |  | 1 |  |  | 499 |
Total investment securities available-for-sale | $ | 964,389 |  |  | $ | 867 |  |  | $ | 70,222 |  |  | $ | 895,034 |
Schedule of Investment Securities in a Continuous Unrealized Loss Position | Investment securities as of December 31, 2025 and 2024 that have been in a continuous unrealized loss position for less than twelve months or twelve months or longer are as follows:
| At December 31, 2025
| Less than Twelve Months |  | Twelve Months or Longer |  | Total
| Estimated Fair Value |  | Unrealized Losses |  | Estimated Fair Value |  | Unrealized Losses |  | Estimated Fair Value |  | Unrealized Losses
| (In Thousands)
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |
GSE debentures | $ | 32 |  |  | $ | 1 |  |  | $ | 103,884 |  |  | $ | 12,283 |  |  | $ | 103,916 |  |  | $ | 12,284 |
GSE CMOs | 68,184 |  |  | 460 |  |  | 45,145 |  |  | 6,200 |  |  | 113,329 |  |  | 6,660 |
GSE MBSs | 79 |  |  | 1 |  |  | 114,594 |  |  | 11,739 |  |  | 114,673 |  |  | 11,740 |
Municipal obligations | 9,721 |  |  | 11 |  |  | 391 |  |  | 2 |  |  | 10,112 |  |  | 13 |
Corporate debt obligations | 4,943 |  |  | 41 |  |  | 2,666 |  |  | 8 |  |  | 7,609 |  |  | 49 |
U.S. Treasury bonds | — |  |  | — |  |  | 203,283 |  |  | 13,904 |  |  | 203,283 |  |  | 13,904 |
Foreign government obligations | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Temporarily impaired investment securities available-for-sale | 82,959 |  |  | 514 |  |  | 469,963 |  |  | 44,136 |  |  | 552,922 |  |  | 44,650 |
Total temporarily impaired investment securities | $ | 82,959 |  |  | $ | 514 |  |  | $ | 469,963 |  |  | $ | 44,136 |  |  | $ | 552,922 |  |  | $ | 44,650 |
| At December 31, 2024
| Less than Twelve Months |  | Twelve Months or Longer |  | Total
| Estimated Fair Value |  | Unrealized Losses |  | Estimated Fair Value |  | Unrealized Losses |  | Estimated Fair Value |  | Unrealized Losses
| (In Thousands)
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |
GSE debentures | $ | 30,753 |  |  | $ | 281 |  |  | $ | 107,750 |  |  | $ | 18,749 |  |  | $ | 138,503 |  |  | $ | 19,030 |
GSE CMOs | 4,664 |  |  | 107 |  |  | 50,334 |  |  | 6,921 |  |  | 54,998 |  |  | 7,028 |
GSE MBSs | 11,128 |  |  | 596 |  |  | 131,481 |  |  | 18,025 |  |  | 142,609 |  |  | 18,621 |
Municipal obligations | 3,616 |  |  | 74 |  |  | 3,568 |  |  | 217 |  |  | 7,184 |  |  | 291 |
Corporate debt obligations | — |  |  | — |  |  | 2,550 |  |  | 78 |  |  | 2,550 |  |  | 78 |
U.S. Treasury bonds | 67,290 |  |  | 285 |  |  | 291,641 |  |  | 24,888 |  |  | 358,931 |  |  | 25,173 |
Foreign government obligations | — |  |  | — |  |  | 499 |  |  | 1 |  |  | 499 |  |  | 1 |
Temporarily impaired investment securities available-for-sale | 117,451 |  |  | 1,343 |  |  | 587,823 |  |  | 68,879 |  |  | 705,274 |  |  | 70,222 |
Total temporarily impaired investment securities | $ | 117,451 |  |  | $ | 1,343 |  |  | $ | 587,823 |  |  | $ | 68,879 |  |  | $ | 705,274 |  |  | $ | 70,222 |
Schedule of Maturities of the Investments in Debt Securities | The final stated maturities of the debt securities are as follows for the periods indicated:
| At December 31,
| 2025 |  | 2024
| Amortized Cost |  | Estimated Fair Value |  | Weighted Average Rate |  | Amortized Cost |  | Estimated Fair Value |  | Weighted Average Rate
| (Dollars in Thousands)
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |
Within 1 year | $ | 145,787 |  |  | $ | 146,092 |  |  | 3.89% |  | $ | 103,337 |  |  | $ | 102,457 |  |  | 3.22%
After 1 year through 5 years | 472,284 |  |  | 454,138 |  |  | 2.76% |  | 449,289 |  |  | 434,608 |  |  | 3.32%
After 5 years through 10 years | 246,784 |  |  | 242,931 |  |  | 3.56% |  | 207,980 |  |  | 180,370 |  |  | 1.77%
Over 10 years | 851,363 |  |  | 845,607 |  |  | 4.18% |  | 203,783 |  |  | 177,599 |  |  | 3.13%
| $ | 1,716,218 |  |  | $ | 1,688,768 |  |  | 3.69% |  | $ | 964,389 |  |  | $ | 895,034 |  |  | 2.96%

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