Note 4 - Securities (Tables)
|
3 Months Ended |
Mar. 31, 2024 |
Notes Tables |
|
Unrealized Gain (Loss) on Investments [Table Text Block] |
|
|
|
|
|
|
Gross |
|
|
Gross |
|
|
|
|
|
|
|
Amortized |
|
|
Unrealized |
|
|
Unrealized |
|
|
Market |
|
|
|
Cost |
|
|
Gain |
|
|
Loss |
|
|
Value |
|
March 31, 2024 |
|
(In Thousands) |
|
Debt Securities Available-for-Sale |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury Securities |
|
$ |
494,156 |
|
|
$ |
10 |
|
|
$ |
(197 |
) |
|
$ |
493,969 |
|
Mortgage-backed securities |
|
|
281,343 |
|
|
|
249 |
|
|
|
(26,677 |
) |
|
|
254,915 |
|
State and municipal securities |
|
|
11,142 |
|
|
|
1 |
|
|
|
(1,186 |
) |
|
|
9,958 |
|
Corporate debt |
|
|
352,684 |
|
|
|
60 |
|
|
|
(37,657 |
) |
|
|
315,086 |
|
Total |
|
$ |
1,139,325 |
|
|
$ |
320 |
|
|
$ |
(65,716 |
) |
|
$ |
1,073,929 |
|
Debt Securities Held-to-Maturity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury Securities |
|
$ |
393,932 |
|
|
$ |
- |
|
|
$ |
(25,065 |
) |
|
$ |
368,868 |
|
Mortgage-backed securities |
|
|
465,695 |
|
|
|
5 |
|
|
|
(56,634 |
) |
|
|
409,066 |
|
State and municipal securities |
|
|
8,069 |
|
|
|
- |
|
|
|
(733 |
) |
|
|
7,336 |
|
Total |
|
$ |
867,696 |
|
|
$ |
5 |
|
|
$ |
(82,431 |
) |
|
$ |
785,270 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
December 31, 2023 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Securities Available-for-Sale |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury Securities |
|
$ |
340,556 |
|
|
$ |
251 |
|
|
$ |
- |
|
|
$ |
340,807 |
|
Mortgage-backed securities |
|
|
241,458 |
|
|
|
6 |
|
|
|
(25,979 |
) |
|
|
215,485 |
|
State and municipal securities |
|
|
11,400 |
|
|
|
1 |
|
|
|
(1,178 |
) |
|
|
10,223 |
|
Corporate debt |
|
|
375,676 |
|
|
|
- |
|
|
|
(42,009 |
) |
|
|
333,667 |
|
Total |
|
$ |
969,090 |
|
|
$ |
258 |
|
|
$ |
(69,166 |
) |
|
$ |
900,183 |
|
Debt Securities Held-to-Maturity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury Securities |
|
$ |
508,985 |
|
|
$ |
- |
|
|
$ |
(24,718 |
) |
|
$ |
484,267 |
|
Mortgage-backed securities |
|
|
465,615 |
|
|
|
3 |
|
|
|
(50,025 |
) |
|
|
415,593 |
|
State and municipal securities |
|
|
8,063 |
|
|
|
- |
|
|
|
(732 |
) |
|
|
7,331 |
|
Total |
|
$ |
982,664 |
|
|
$ |
3 |
|
|
$ |
(75,475 |
) |
|
$ |
907,191 |
|
|
Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
|
|
March 31, 2024 |
|
|
December 31, 2023 |
|
|
|
Amortized Cost |
|
|
Market Value |
|
|
Amortized Cost |
|
|
Market Value |
|
|
|
(In Thousands) |
|
Debt securities available-for-sale |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Due within one year |
|
$ |
430,857 |
|
|
$ |
430,760 |
|
|
$ |
350,400 |
|
|
$ |
350,396 |
|
Due from one to five years |
|
|
132,967 |
|
|
|
129,779 |
|
|
|
70,016 |
|
|
|
67,334 |
|
Due from five to ten years |
|
|
291,157 |
|
|
|
256,407 |
|
|
|
304,216 |
|
|
|
264,893 |
|
Due after ten years |
|
|
3,000 |
|
|
|
2,068 |
|
|
|
3,000 |
|
|
|
2,076 |
|
Mortgage-backed securities |
|
|
281,343 |
|
|
|
254,915 |
|
|
|
241,458 |
|
|
|
215,485 |
|
|
|
$ |
1,139,325 |
|
|
$ |
1,073,929 |
|
|
$ |
969,090 |
|
|
$ |
900,183 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt securities held-to-maturity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Due within one year |
|
$ |
144,940 |
|
|
$ |
144,283 |
|
|
$ |
260,047 |
|
|
$ |
257,835 |
|
Due from one to five years |
|
|
253,772 |
|
|
|
229,043 |
|
|
|
203,481 |
|
|
|
185,741 |
|
Due from five to ten years |
|
|
3,289 |
|
|
|
2,878 |
|
|
|
53,521 |
|
|
|
48,022 |
|
Mortgage-backed securities |
|
|
465,695 |
|
|
|
409,066 |
|
|
|
465,615 |
|
|
|
415,593 |
|
|
|
$ |
867,696 |
|
|
$ |
785,270 |
|
|
$ |
982,664 |
|
|
$ |
907,191 |
|
|
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, 2024 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Securities available-for-sale |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury Securities |
|
$ |
(197 |
) |
|
$ |
479,762 |
|
|
$ |
- |
|
|
$ |
- |
|
|
$ |
(197 |
) |
|
$ |
479,762 |
|
Government Agency Securities |
|
|
- |
|
|
|
- |
|
|
|
- |
|
|
|
- |
|
|
|
- |
|
|
|
- |
|
Mortgage-backed securities |
|
|
(2 |
) |
|
|
161 |
|
|
|
(26,674 |
) |
|
|
205,195 |
|
|
|
(26,677 |
) |
|
|
205,356 |
|
State and municipal securities |
|
|
- |
|
|
|
- |
|
|
|
(1,186 |
) |
|
|
9,512 |
|
|
|
(1,186 |
) |
|
|
9,512 |
|
Corporate debt |
|
|
(2,392 |
) |
|
|
11,108 |
|
|
|
(35,265 |
) |
|
|
294,003 |
|
|
|
(37,657 |
) |
|
|
305,111 |
|
Total |
|
$ |
(2,591 |
) |
|
$ |
491,031 |
|
|
$ |
(63,125 |
) |
|
$ |
508,710 |
|
|
$ |
(65,716 |
) |
|
$ |
999,741 |
|
Debt Securities held-to-maturity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury Securities |
|
$ |
- |
|
|
$ |
- |
|
|
$ |
(25,065 |
) |
|
$ |
368,868 |
|
|
$ |
(25,065 |
) |
|
$ |
368,868 |
|
Mortgage-backed securities |
|
|
(162 |
) |
|
|
9,895 |
|
|
|
(56,471 |
) |
|
|
393,887 |
|
|
|
(56,634 |
) |
|
|
405,323 |
|
State and municipal securities |
|
|
- |
|
|
|
- |
|
|
|
(733 |
) |
|
|
7,086 |
|
|
|
(733 |
) |
|
|
7,086 |
|
Total |
|
$ |
(162 |
) |
|
$ |
9,895 |
|
|
$ |
(82,269 |
) |
|
$ |
771,382 |
|
|
$ |
(82,431 |
) |
|
$ |
779,735 |
|
December 31, 2023 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Securities available-for-sale |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Mortgage-backed securities |
|
$ |
(6 |
) |
|
$ |
704 |
|
|
$ |
(25,973 |
) |
|
$ |
214,393 |
|
|
$ |
(25,979 |
) |
|
$ |
215,097 |
|
State and municipal securities |
|
|
- |
|
|
|
- |
|
|
|
(1,178 |
) |
|
|
9,777 |
|
|
|
(1,178 |
) |
|
|
9,777 |
|
Corporate debt |
|
|
(794 |
) |
|
|
15,141 |
|
|
|
(41,214 |
) |
|
|
311,666 |
|
|
|
(42,009 |
) |
|
|
326,807 |
|
Total |
|
$ |
(801 |
) |
|
$ |
15,845 |
|
|
$ |
(68,365 |
) |
|
$ |
535,836 |
|
|
$ |
(69,166 |
) |
|
$ |
551,681 |
|
Debt Securities held-to-maturity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
U.S. Treasury Securities |
|
$ |
- |
|
|
$ |
- |
|
|
$ |
(24,718 |
) |
|
$ |
484,267 |
|
|
$ |
(24,718 |
) |
|
$ |
484,267 |
|
Mortgage-backed securities |
|
|
(1 |
) |
|
|
430 |
|
|
|
(50,024 |
) |
|
|
411,585 |
|
|
|
(50,025 |
) |
|
|
412,015 |
|
State and municipal securities |
|
|
- |
|
|
|
- |
|
|
|
(732 |
) |
|
|
7,081 |
|
|
|
(732 |
) |
|
|
7,081 |
|
Total |
|
$ |
(1 |
) |
|
$ |
430 |
|
|
$ |
(75,474 |
) |
|
$ |
902,933 |
|
|
$ |
(75,475 |
) |
|
$ |
903,363 |
|
|