| Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] |
| |
|
Amortized Cost |
|
|
Gross Unrealized Gains |
|
|
Gross Unrealized Losses |
|
|
Fair 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 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| December 31, 2022 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Available for Sale: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury and federal agency securities |
|
$ |
240,921 |
|
|
$ |
23 |
|
|
$ |
(16,310 |
) |
|
$ |
224,634 |
|
| Agency MBS and CMOs |
|
|
128,165 |
|
|
|
— |
|
|
|
(14,347 |
) |
|
|
113,818 |
|
| Tax-exempt state and municipal bonds |
|
|
37,198 |
|
|
|
10 |
|
|
|
(498 |
) |
|
|
36,710 |
|
| Taxable state and municipal bonds |
|
|
120,647 |
|
|
|
49 |
|
|
|
(8,525 |
) |
|
|
112,171 |
|
| Corporate bonds and other debt securities |
|
|
12,387 |
|
|
|
— |
|
|
|
(463 |
) |
|
|
11,924 |
|
| |
|
$ |
539,318 |
|
|
$ |
82 |
|
|
$ |
(40,143 |
) |
|
$ |
499,257 |
|
| Held to Maturity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury |
|
$ |
251,307 |
|
|
$ |
— |
|
|
$ |
(13,677 |
) |
|
|
237,630 |
|
| Tax-exempt state and municipal bonds |
|
|
97,458 |
|
|
|
415 |
|
|
|
(2,853 |
) |
|
|
95,020 |
|
| |
|
$ |
348,765 |
|
|
$ |
415 |
|
|
$ |
(16,530 |
) |
|
$ |
332,650 |
|
| |
|
Held–to-Maturity Securities |
|
|
Available-for-Sale Securities |
|
| |
|
Amortized Cost |
|
|
Fair Value |
|
|
Amortized Cost |
|
|
Fair Value |
|
| Due in one year or less |
|
$ |
153,581 |
|
|
$ |
151,849 |
|
|
$ |
126,515 |
|
|
$ |
124,986 |
|
| Due from one to five years |
|
|
165,867 |
|
|
|
158,034 |
|
|
|
281,413 |
|
|
|
266,356 |
|
| Due from five to ten years |
|
|
12,075 |
|
|
|
12,215 |
|
|
|
6,199 |
|
|
|
6,120 |
|
| Due after ten years |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
| Agency MBS and CMOs |
|
|
— |
|
|
|
— |
|
|
|
123,767 |
|
|
|
111,336 |
|
| |
|
$ |
331,523 |
|
|
$ |
322,098 |
|
|
$ |
537,894 |
|
|
$ |
508,798 |
|
|
| Unrealized Gain (Loss) on Investments [Table Text Block] |
| |
|
Less than 12 Months |
|
|
12 Months or More |
|
|
Total |
|
| December 31, 2023 |
|
Fair Value |
|
|
Unrealized Loss |
|
|
Fair Value |
|
|
Unrealized Loss |
|
|
Fair Value |
|
|
Unrealized 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 |
) |
| |
|
Less than 12 Months |
|
|
12 Months or More |
|
|
Total |
|
| December 31, 2022 |
|
Fair Value |
|
|
Unrealized Loss |
|
|
Fair Value |
|
|
Unrealized Loss |
|
|
Fair Value |
|
|
Unrealized Loss |
|
| Available for Sale: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury and federal agency securities |
|
$ |
144,796 |
|
|
$ |
(6,230 |
) |
|
$ |
66,008 |
|
|
$ |
(10,080 |
) |
|
$ |
210,804 |
|
|
$ |
(16,310 |
) |
| Agency MBS and CMOs |
|
|
64,427 |
|
|
|
(4,789 |
) |
|
|
41,340 |
|
|
|
(9,558 |
) |
|
|
105,767 |
|
|
|
(14,347 |
) |
| Tax-exempt state and municipal bonds |
|
|
31,337 |
|
|
|
(498 |
) |
|
|
— |
|
|
|
— |
|
|
|
31,337 |
|
|
|
(498 |
) |
| Taxable state and municipal bonds |
|
|
71,165 |
|
|
|
(3,337 |
) |
|
|
33,452 |
|
|
|
(5,188 |
) |
|
|
104,617 |
|
|
|
(8,525 |
) |
| Corporate bonds and other debt securities |
|
|
10,668 |
|
|
|
(357 |
) |
|
|
1,256 |
|
|
|
(106 |
) |
|
|
11,924 |
|
|
|
(463 |
) |
| |
|
$ |
322,393 |
|
|
$ |
(15,211 |
) |
|
$ |
142,056 |
|
|
$ |
(24,932 |
) |
|
$ |
464,449 |
|
|
$ |
(40,143 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Held to Maturity: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury |
|
$ |
237,630 |
|
|
$ |
(13,677 |
) |
|
$ |
— |
|
|
$ |
— |
|
|
$ |
237,630 |
|
|
$ |
(13,677 |
) |
| Tax-exempt state and municipal bonds |
|
|
57,671 |
|
|
|
(2,314 |
) |
|
|
21,721 |
|
|
|
(539 |
) |
|
|
79,392 |
|
|
|
(2,853 |
) |
| |
|
$ |
295,301 |
|
|
$ |
(15,991 |
) |
|
$ |
21,721 |
|
|
$ |
(539 |
) |
|
$ |
317,022 |
|
|
$ |
(16,530 |
) |
|