| Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] |
| |
|
|
|
|
|
Gross |
|
|
Gross |
|
|
|
|
|
| |
|
Amortized |
|
|
Unrealized |
|
|
Unrealized |
|
|
Fair |
|
| |
|
Cost |
|
|
Gains |
|
|
Losses |
|
|
Value |
|
| March 31, 2024 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Available for Sale |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury and federal agency securities |
|
$ |
245,896 |
|
|
$ |
— |
|
|
$ |
(10,815 |
) |
|
$ |
235,081 |
|
| Agency MBS and CMOs |
|
|
120,328 |
|
|
|
35 |
|
|
|
(13,331 |
) |
|
|
107,032 |
|
| Tax-exempt state and municipal bonds |
|
|
30,800 |
|
|
|
— |
|
|
|
(519 |
) |
|
|
30,281 |
|
| Taxable state and municipal bonds |
|
|
112,976 |
|
|
|
53 |
|
|
|
(5,528 |
) |
|
|
107,501 |
|
| Corporate bonds and other debt securities |
|
|
11,555 |
|
|
|
— |
|
|
|
(236 |
) |
|
|
11,319 |
|
| |
|
$ |
521,555 |
|
|
$ |
88 |
|
|
$ |
(30,429 |
) |
|
$ |
491,214 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Held to Maturity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury |
|
$ |
221,211 |
|
|
$ |
— |
|
|
$ |
(7,945 |
) |
|
$ |
213,266 |
|
| Tax-exempt state and municipal bonds |
|
|
79,540 |
|
|
|
230 |
|
|
|
(1,385 |
) |
|
|
78,385 |
|
| |
|
$ |
300,751 |
|
|
$ |
230 |
|
|
$ |
(9,330 |
) |
|
$ |
291,651 |
|
| |
|
|
|
|
|
Gross |
|
|
Gross |
|
|
|
|
|
| |
|
Amortized |
|
|
Unrealized |
|
|
Unrealized |
|
|
Fair |
|
| |
|
Cost |
|
|
Gains |
|
|
Losses |
|
|
Value |
|
| December 31, 2023 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Available for Sale: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury and federal agency securities |
|
$ |
256,234 |
|
|
$ |
25 |
|
|
$ |
(10,767 |
) |
|
$ |
245,492 |
|
| Agency MBS and CMOs |
|
|
123,767 |
|
|
|
173 |
|
|
|
(12,604 |
) |
|
|
111,336 |
|
| Tax-exempt state and municipal bonds |
|
|
30,850 |
|
|
|
31 |
|
|
|
(284 |
) |
|
|
30,597 |
|
| Taxable state and municipal bonds |
|
|
115,516 |
|
|
|
105 |
|
|
|
(5,545 |
) |
|
|
110,076 |
|
| Corporate bonds and other debt securities |
|
|
11,527 |
|
|
|
3 |
|
|
|
(233 |
) |
|
|
11,297 |
|
| |
|
$ |
537,894 |
|
|
$ |
337 |
|
|
$ |
(29,433 |
) |
|
$ |
508,798 |
|
| Held to Maturity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury |
|
$ |
251,229 |
|
|
$ |
— |
|
|
$ |
(8,520 |
) |
|
$ |
242,709 |
|
| Tax-exempt state and municipal bonds |
|
|
80,294 |
|
|
|
284 |
|
|
|
(1,189 |
) |
|
|
79,389 |
|
| |
|
$ |
331,523 |
|
|
$ |
284 |
|
|
$ |
(9,709 |
) |
|
$ |
322,098 |
|
| |
|
Held–to-Maturity Securities |
|
|
Available-for-Sale Securities |
|
| |
|
Amortized |
|
|
Fair |
|
|
Amortized |
|
|
Fair |
|
| |
|
Cost |
|
|
Value |
|
|
Cost |
|
|
Value |
|
| Due in one year or less |
|
$ |
133,656 |
|
|
$ |
132,252 |
|
|
$ |
141,534 |
|
|
$ |
140,076 |
|
| Due from one to five years |
|
|
155,020 |
|
|
|
147,346 |
|
|
|
253,495 |
|
|
|
238,070 |
|
| Due from five to ten years |
|
|
12,075 |
|
|
|
12,053 |
|
|
|
6,198 |
|
|
|
6,036 |
|
| Due after ten years |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
| Agency MBS and CMOs |
|
|
— |
|
|
|
— |
|
|
|
120,328 |
|
|
|
107,032 |
|
| |
|
$ |
300,751 |
|
|
$ |
291,651 |
|
|
$ |
521,555 |
|
|
$ |
491,214 |
|
|
| Unrealized Gain (Loss) on Investments [Table Text Block] |
| |
|
Less than 12 Months |
|
|
12 Months or More |
|
|
Total |
|
| |
|
Fair |
|
|
Unrealized |
|
|
Fair |
|
|
Unrealized |
|
|
Fair |
|
|
Unrealized |
|
| March 31, 2024 |
|
Value |
|
|
Loss |
|
|
Value |
|
|
Loss |
|
|
Value |
|
|
Loss |
|
| Available for Sale |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury and federal agency securities |
|
$ |
28,390 |
|
|
$ |
(53 |
) |
|
$ |
206,691 |
|
|
$ |
(10,761 |
) |
|
$ |
235,081 |
|
|
$ |
(10,814 |
) |
| Agency MBS and CMOs |
|
|
15,544 |
|
|
|
(150 |
) |
|
|
84,892 |
|
|
|
(13,181 |
) |
|
|
100,436 |
|
|
|
(13,331 |
) |
| Tax-exempt state and municipal bonds |
|
|
11,316 |
|
|
|
(98 |
) |
|
|
18,965 |
|
|
|
(423 |
) |
|
|
30,281 |
|
|
|
(521 |
) |
| Taxable state and municipal bonds |
|
|
8,442 |
|
|
|
(29 |
) |
|
|
92,753 |
|
|
|
(5,499 |
) |
|
|
101,195 |
|
|
|
(5,528 |
) |
| Corporate bonds and other debt securities |
|
|
471 |
|
|
|
(3 |
) |
|
|
10,848 |
|
|
|
(232 |
) |
|
|
11,319 |
|
|
|
(235 |
) |
| |
|
$ |
64,163 |
|
|
$ |
(333 |
) |
|
$ |
414,149 |
|
|
$ |
(30,096 |
) |
|
$ |
478,312 |
|
|
$ |
(30,429 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Held to Maturity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury |
|
$ |
— |
|
|
$ |
— |
|
|
$ |
213,266 |
|
|
$ |
(7,945 |
) |
|
$ |
213,266 |
|
|
$ |
(7,945 |
) |
| Tax-exempt state and municipal bonds |
|
|
20,118 |
|
|
|
(53 |
) |
|
|
48,402 |
|
|
|
(1,332 |
) |
|
|
68,520 |
|
|
|
(1,385 |
) |
| |
|
$ |
20,118 |
|
|
$ |
(53 |
) |
|
$ |
261,668 |
|
|
$ |
(9,277 |
) |
|
$ |
281,786 |
|
|
$ |
(9,330 |
) |
| |
|
Less than 12 Months |
|
|
12 Months or More |
|
|
Total |
|
| |
|
Fair |
|
|
Unrealized |
|
|
Fair |
|
|
Unrealized |
|
|
Fair |
|
|
Unrealized |
|
| December 31, 2023 |
|
Value |
|
|
Loss |
|
|
Value |
|
|
Loss |
|
|
Value |
|
|
Loss |
|
| Available for Sale: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury and federal agency securities |
|
$ |
15,615 |
|
|
$ |
(41 |
) |
|
$ |
215,712 |
|
|
$ |
(10,726 |
) |
|
$ |
231,327 |
|
|
$ |
(10,767 |
) |
| Agency MBS and CMOs |
|
|
8,574 |
|
|
|
(52 |
) |
|
|
83,893 |
|
|
|
(12,552 |
) |
|
|
92,467 |
|
|
|
(12,604 |
) |
| Tax-exempt state and municipal bonds |
|
|
8,472 |
|
|
|
(50 |
) |
|
|
13,296 |
|
|
|
(234 |
) |
|
|
21,768 |
|
|
|
(284 |
) |
| Taxable state and municipal bonds |
|
|
4,667 |
|
|
|
(18 |
) |
|
|
93,900 |
|
|
|
(5,527 |
) |
|
|
98,567 |
|
|
|
(5,545 |
) |
| Corporate bonds and other debt securities |
|
|
— |
|
|
|
— |
|
|
|
10,822 |
|
|
|
(233 |
) |
|
|
10,822 |
|
|
|
(233 |
) |
| |
|
$ |
37,328 |
|
|
$ |
(161 |
) |
|
$ |
417,623 |
|
|
$ |
(29,272 |
) |
|
$ |
454,951 |
|
|
$ |
(29,433 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Held to Maturity: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury |
|
$ |
— |
|
|
$ |
— |
|
|
$ |
242,709 |
|
|
$ |
(8,520 |
) |
|
$ |
242,709 |
|
|
$ |
(8,520 |
) |
| Tax-exempt state and municipal bonds |
|
|
673 |
|
|
|
(2 |
) |
|
|
45,513 |
|
|
|
(1,187 |
) |
|
|
46,186 |
|
|
|
(1,189 |
) |
| |
|
$ |
673 |
|
|
$ |
(2 |
) |
|
$ |
288,222 |
|
|
$ |
(9,707 |
) |
|
$ |
288,895 |
|
|
$ |
(9,709 |
) |
|