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v3.25.4

Note 2 - Debt Securities (Tables) | 12 Months Ended
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Dec. 31, 2025
Notes Tables |
Unrealized Gain (Loss) on Investments [Table Text Block] |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Market |
|  | Cost |  |  | Gain |  |  | Loss |  |  | Value |
December 31, 2025 |  | (In Thousands) |
Debt Securities Available-for-Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 520,100 |  |  | $ | 2,823 |  |  | $ | - |  |  | $ | 522,923 |
Mortgage-backed securities |  |  | 133,126 |  |  |  | 1,030 |  |  |  | (852 | ) |  |  | 133,304 |
State and municipal securities |  |  | 10,362 |  |  |  | 1 |  |  |  | (554 | ) |  |  | 9,809 |
Corporate debt |  |  | 409,725 |  |  |  | 2,274 |  |  |  | (9,210 | ) |  |  | 402,789 |
Total |  | $ | 1,073,313 |  |  | $ | 6,128 |  |  | $ | (10,616 | ) |  | $ | 1,068,825 |
Debt Securities Held-to-Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 249,621 |  |  | $ | - |  |  | $ | (9,589 | ) |  | $ | 240,032 |
Mortgage-backed securities |  |  | 402,097 |  |  |  | 743 |  |  |  | (34,395 | ) |  |  | 368,445 |
State and municipal securities |  |  | 8,358 |  |  |  | - |  |  |  | (300 | ) |  |  | 8,058 |
Total |  | $ | 660,076 |  |  | $ | 743 |  |  | $ | (44,284 | ) |  | $ | 616,535 |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Securities Available-for-Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 617,350 |  |  | $ | 580 |  |  | $ | (444 | ) |  | $ | 617,486 |
Mortgage-backed securities |  |  | 243,435 |  |  |  | 49 |  |  |  | (24,210 | ) |  |  | 219,274 |
State and municipal securities |  |  | 10,516 |  |  |  | 1 |  |  |  | (1,000 | ) |  |  | 9,517 |
Corporate debt |  |  | 335,758 |  |  |  | 38 |  |  |  | (20,673 | ) |  |  | 315,123 |
Total |  | $ | 1,207,059 |  |  | $ | 668 |  |  | $ | (46,327 | ) |  | $ | 1,161,400 |
Debt Securities Held-to-Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 249,403 |  |  | $ | - |  |  | $ | (19,632 | ) |  | $ | 229,771 |
Mortgage-backed securities |  |  | 457,365 |  |  |  | 14 |  |  |  | (55,150 | ) |  |  | 402,229 |
State and municipal securities |  |  | 8,085 |  |  |  | - |  |  |  | (589 | ) |  |  | 7,496 |
Total |  | $ | 714,853 |  |  | $ | 14 |  |  | $ | (75,371 | ) |  | $ | 639,496 |
Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
|  | December 31, 2025 |  |  | December 31, 2024 |
|  | Amortized Cost |  |  | Market Value |  |  | Amortized Cost |  |  | Market Value |
|  | (In Thousands) |
Debt securities available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due within one year |  | $ | 441,619 |  |  | $ | 443,833 |  |  | $ | 223,145 |  |  | $ | 223,477 |
Due from one to five years |  |  | 147,475 |  |  |  | 147,058 |  |  |  | 478,868 |  |  |  | 475,985 |
Due from five to ten years |  |  | 332,436 |  |  |  | 325,957 |  |  |  | 258,611 |  |  |  | 240,114 |
Due after ten years |  |  | 18,657 |  |  |  | 18,673 |  |  |  | 3,000 |  |  |  | 2,550 |
Mortgage-backed securities |  |  | 133,126 |  |  |  | 133,304 |  |  |  | 243,435 |  |  |  | 219,274 |
|  | $ | 1,073,313 |  |  | $ | 1,068,825 |  |  | $ | 1,207,059 |  |  | $ | 1,161,400 |
Debt securities held-to-maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due within one year |  | $ | 53,787 |  |  | $ | 52,811 |  |  | $ | 250 |  |  | $ | 250 |
Due from one to five years |  |  | 204,192 |  |  |  | 195,279 |  |  |  | 256,743 |  |  |  | 236,586 |
Due from five to ten years |  |  | - |  |  |  | - |  |  |  | 495 |  |  |  | 431 |
Due after ten years |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Mortgage-backed securities |  |  | 402,097 |  |  |  | 368,445 |  |  |  | 457,365 |  |  |  | 402,229 |
|  | $ | 660,076 |  |  | $ | 616,535 |  |  | $ | 714,853 |  |  | $ | 639,496 |
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) |
December 31, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Securities available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | - |  |  | $ | - |  |  | $ | (852 | ) |  | $ | 22,662 |  |  | $ | (852 | ) |  | $ | 22,662 |
State and municipal securities |  |  | - |  |  |  | - |  |  |  | (554 | ) |  |  | 9,363 |  |  |  | (554 | ) |  |  | 9,363 |
Corporate debt |  |  | (984 | ) |  |  | 77,583 |  |  |  | (8,226 | ) |  |  | 155,724 |  |  |  | (9,210 | ) |  |  | 233,307 |
Total |  | $ | (984 | ) |  | $ | 77,583 |  |  | $ | (9,632 | ) |  | $ | 187,749 |  |  | $ | (10,616 | ) |  | $ | 265,332 |
Debt Securities held-to-maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | - |  |  | $ | - |  |  | $ | (9,589 | ) |  | $ | 240,032 |  |  | $ | (9,589 | ) |  | $ | 240,032 |
Mortgage-backed securities |  |  | - |  |  |  | - |  |  |  | (34,395 | ) |  |  | 325,307 |  |  |  | (34,395 | ) |  |  | 325,307 |
State and municipal securities |  |  | (34 | ) |  |  | 2,954 |  |  |  | (266 | ) |  |  | 4,604 |  |  |  | (300 | ) |  |  | 7,558 |
Total |  | $ | (34 | ) |  | $ | 2,954 |  |  | $ | (44,250 | ) |  | $ | 569,943 |  |  | $ | (44,284 | ) |  | $ | 572,897 |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Securities available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | (445 | ) |  | $ | 250,547 |  |  | $ | - |  |  | $ | - |  |  | $ | (445 | ) |  | $ | 250,547 |
Mortgage-backed securities |  | $ | (6 | ) |  | $ | 577 |  |  | $ | (24,204 | ) |  | $ | 179,178 |  |  | $ | (24,210 | ) |  | $ | 179,755 |
State and municipal securities |  |  | - |  |  |  | - |  |  |  | (1,000 | ) |  |  | 9,072 |  |  |  | (1,000 | ) |  |  | 9,072 |
Corporate debt |  |  | (1,307 | ) |  |  | 25,596 |  |  |  | (19,366 | ) |  |  | 284,489 |  |  |  | (20,673 | ) |  |  | 310,085 |
Total |  | $ | (1,758 | ) |  | $ | 276,720 |  |  | $ | (44,570 | ) |  | $ | 472,739 |  |  | $ | (46,328 | ) |  | $ | 749,459 |
U.S. Treasury securities |  | $ | - |  |  | $ | - |  |  | $ | (19,632 | ) |  | $ | 229,771 |  |  | $ | (19,632 | ) |  | $ | 229,771 |
Mortgage-backed securities |  |  | (536 | ) |  |  | 40,115 |  |  |  | (54,614 | ) |  |  | 356,215 |  |  |  | (55,150 | ) |  |  | 396,330 |
State and municipal securities |  |  | - |  |  |  | - |  |  |  | (589 | ) |  |  | 7,247 |  |  |  | (589 | ) |  |  | 7,247 |
Total |  | $ | (536 | ) |  | $ | 40,115 |  |  | $ | (74,835 | ) |  | $ | 593,233 |  |  | $ | (75,371 | ) |  | $ | 633,348 |
Debt Securities, Available-for-Sale [Table Text Block] |
|  | Years Ended December 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
|  | (In Thousands) |
Sale proceeds |  | $ | 159,499 |  |  | $ | - |  |  | $ | - |
Gross realized gains |  | $ | - |  |  | $ | - |  |  | $ | - |
Gross realized losses |  |  | (16,375 | ) |  |  | - |  |  |  | - |
Net realized (loss) gain |  | $ | (16,375 | ) |  | $ | - |  |  | $ | - |

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