Note 4 - Securities (Tables)
|
3 Months Ended |
Mar. 31, 2026 |
| Notes Tables |
|
| Unrealized Gain (Loss) on Investments [Table Text Block] |
| |
|
|
|
|
|
Gross
|
|
|
Gross
|
|
|
|
|
|
| |
|
Amortized
|
|
|
Unrealized
|
|
|
Unrealized
|
|
|
Fair
|
|
| |
|
Cost
|
|
|
Gain
|
|
|
Loss
|
|
|
Value
|
|
|
March 31, 2026
|
|
(In Thousands) |
|
|
Debt Securities Available-for-Sale
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury securities
|
|
$ |
470,349 |
|
|
$ |
1,344 |
|
|
$ |
- |
|
|
$ |
471,693 |
|
|
Mortgage-backed securities
|
|
|
123,874 |
|
|
|
412 |
|
|
|
(1,126 |
) |
|
|
123,160 |
|
|
State and municipal securities
|
|
|
10,360 |
|
|
|
1 |
|
|
|
(539 |
) |
|
|
9,822 |
|
|
Corporate debt
|
|
|
438,123 |
|
|
|
2,949 |
|
|
|
(8,596 |
) |
|
|
432,476 |
|
|
Total
|
|
$ |
1,042,706 |
|
|
$ |
4,706 |
|
|
$ |
(10,261 |
) |
|
$ |
1,037,151 |
|
|
Debt Securities Held-to-Maturity
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury securities
|
|
$ |
249,675 |
|
|
$ |
- |
|
|
$ |
(9,420 |
) |
|
$ |
240,255 |
|
|
Mortgage-backed securities
|
|
|
389,231 |
|
|
|
474 |
|
|
|
(35,555 |
) |
|
|
354,150 |
|
|
State and municipal securities
|
|
|
8,364 |
|
|
|
- |
|
|
|
(293 |
) |
|
|
8,071 |
|
|
Total
|
|
$ |
647,270 |
|
|
$ |
474 |
|
|
$ |
(45,268 |
) |
|
$ |
602,476 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
December 31, 2025
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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 |
|
|
| Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
| |
|
March 31, 2026
|
|
|
December 31, 2025
|
|
| |
|
Amortized Cost
|
|
|
Market Value
|
|
|
Amortized Cost
|
|
|
Market Value
|
|
| |
|
(In Thousands)
|
|
|
Debt securities available-for-sale
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Due within one year
|
|
$ |
472,351 |
|
|
$ |
473,663 |
|
|
$ |
441,619 |
|
|
$ |
443,833 |
|
|
Due from one to five years
|
|
|
73,035 |
|
|
|
72,383 |
|
|
|
147,475 |
|
|
|
147,058 |
|
|
Due from five to ten years
|
|
|
373,446 |
|
|
|
367,945 |
|
|
|
332,436 |
|
|
|
325,957 |
|
|
Due after ten years
|
|
|
- |
|
|
|
- |
|
|
|
18,657 |
|
|
|
18,673 |
|
|
Mortgage-backed securities
|
|
|
123,874 |
|
|
|
123,160 |
|
|
|
133,126 |
|
|
|
133,304 |
|
| |
|
$ |
1,042,706 |
|
|
$ |
1,037,151 |
|
|
$ |
1,073,313 |
|
|
$ |
1,068,825 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt securities held-to-maturity
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Due within one year
|
|
$ |
128,763 |
|
|
$ |
126,586 |
|
|
$ |
53,787 |
|
|
$ |
52,811 |
|
|
Due from one to five years
|
|
|
129,276 |
|
|
|
121,740 |
|
|
|
204,192 |
|
|
|
195,279 |
|
|
Mortgage-backed securities
|
|
|
389,231 |
|
|
|
354,150 |
|
|
|
402,097 |
|
|
|
368,445 |
|
| |
|
$ |
647,270 |
|
|
$ |
602,476 |
|
|
$ |
660,076 |
|
|
$ |
616,535 |
|
|
| 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, 2026
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Securities available-for-sale
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Mortgage-backed securities
|
|
$ |
(267 |
) |
|
$ |
44,592 |
|
|
$ |
(859 |
) |
|
$ |
20,018 |
|
|
$ |
(1,126 |
) |
|
$ |
64,610 |
|
|
State and municipal securities
|
|
|
- |
|
|
|
- |
|
|
|
(539 |
) |
|
|
9,376 |
|
|
|
(539 |
) |
|
|
9,376 |
|
|
Corporate debt
|
|
|
(1,441 |
) |
|
|
132,424 |
|
|
|
(7,155 |
) |
|
|
140,337 |
|
|
|
(8,596 |
) |
|
|
272,761 |
|
|
Total
|
|
$ |
(1,708 |
) |
|
$ |
177,016 |
|
|
$ |
(8,553 |
) |
|
$ |
169,731 |
|
|
$ |
(10,261 |
) |
|
$ |
346,747 |
|
|
Debt Securities held-to-maturity
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury securities
|
|
$ |
- |
|
|
$ |
- |
|
|
$ |
(9,420 |
) |
|
$ |
240,255 |
|
|
$ |
(9,420 |
) |
|
$ |
240,255 |
|
|
Mortgage-backed securities
|
|
|
(8 |
) |
|
|
2,382 |
|
|
|
(35,547 |
) |
|
|
312,274 |
|
|
|
(35,555 |
) |
|
|
314,656 |
|
|
State and municipal securities
|
|
|
- |
|
|
|
- |
|
|
|
(293 |
) |
|
|
7,571 |
|
|
|
(293 |
) |
|
|
7,571 |
|
|
Total
|
|
$ |
(8 |
) |
|
$ |
2,382 |
|
|
$ |
(45,260 |
) |
|
$ |
560,100 |
|
|
$ |
(45,268 |
) |
|
$ |
562,482 |
|
|
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 |
|
|