| Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] |
| |
|
|
|
|
|
Gross |
|
|
Gross |
|
|
|
|
|
| |
|
Amortized |
|
|
Unrealized |
|
|
Unrealized |
|
|
Fair |
|
| |
|
Cost |
|
|
Gains |
|
|
Losses |
|
|
Value |
|
| September 30, 2023 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Available for Sale |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury and federal agency securities |
|
$ |
255,887 |
|
|
$ |
— |
|
|
$ |
(15,774 |
) |
|
$ |
240,113 |
|
| U.S. Agency MBS and CMOs |
|
|
127,040 |
|
|
|
— |
|
|
|
(17,078 |
) |
|
|
109,962 |
|
| Tax-exempt state and municipal bonds |
|
|
34,614 |
|
|
|
— |
|
|
|
(1,365 |
) |
|
|
33,249 |
|
| Taxable state and municipal bonds |
|
|
116,132 |
|
|
|
4 |
|
|
|
(7,927 |
) |
|
|
108,209 |
|
| Corporate bonds and other debt securities |
|
|
12,161 |
|
|
|
— |
|
|
|
(417 |
) |
|
|
11,744 |
|
| |
|
$ |
545,834 |
|
|
$ |
4 |
|
|
$ |
(42,561 |
) |
|
$ |
503,277 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Held to Maturity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury |
|
$ |
251,248 |
|
|
$ |
— |
|
|
$ |
(12,277 |
) |
|
$ |
238,971 |
|
| Tax-exempt state and municipal bonds |
|
|
78,755 |
|
|
|
55 |
|
|
|
(3,323 |
) |
|
|
75,487 |
|
| |
|
$ |
330,003 |
|
|
$ |
55 |
|
|
$ |
(15,600 |
) |
|
$ |
314,458 |
|
| |
|
|
|
|
|
Gross |
|
|
Gross |
|
|
|
|
|
| |
|
Amortized |
|
|
Unrealized |
|
|
Unrealized |
|
|
Fair |
|
| |
|
Cost |
|
|
Gains |
|
|
Losses |
|
|
Value |
|
| December 31, 2022 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Available for Sale: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury and federal agency securities |
|
$ |
240,921 |
|
|
$ |
23 |
|
|
$ |
(16,310 |
) |
|
$ |
224,634 |
|
| U.S. 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 |
|
|
Fair |
|
|
Amortized |
|
|
Fair |
|
| |
|
Cost |
|
|
Value |
|
|
Cost |
|
|
Value |
|
| Due in one year or less |
|
$ |
133,471 |
|
|
$ |
131,195 |
|
|
$ |
96,702 |
|
|
$ |
95,025 |
|
| Due from one to five years |
|
|
179,098 |
|
|
|
166,829 |
|
|
|
304,828 |
|
|
|
283,371 |
|
| Due from five to ten years |
|
|
17,434 |
|
|
|
16,434 |
|
|
|
18,656 |
|
|
|
16,224 |
|
| Due after ten years |
|
|
— |
|
|
|
— |
|
|
|
125,648 |
|
|
|
108,657 |
|
| |
|
$ |
330,003 |
|
|
$ |
314,458 |
|
|
$ |
545,834 |
|
|
$ |
503,277 |
|
|
| Schedule of Unrealized Loss on Investments [Table Text Block] |
| |
|
Less than 12 Months |
|
|
12 Months or More |
|
|
Total |
|
| |
|
Fair |
|
|
Unrealized |
|
|
Fair |
|
|
Unrealized |
|
|
Fair |
|
|
Unrealized |
|
| September 30, 2023 |
|
Value |
|
|
Loss |
|
|
Value |
|
|
Loss |
|
|
Value |
|
|
Loss |
|
| Available for Sale |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury and federal agency securities |
|
$ |
32,037 |
|
|
$ |
(293 |
) |
|
$ |
208,077 |
|
|
$ |
(15,481 |
) |
|
$ |
240,114 |
|
|
$ |
(15,774 |
) |
| U.S. Agency MBS and CMOs |
|
|
27,594 |
|
|
|
(646 |
) |
|
|
82,369 |
|
|
|
(16,432 |
) |
|
|
109,963 |
|
|
|
(17,078 |
) |
| Tax-exempt state and municipal bonds |
|
|
18,452 |
|
|
|
(692 |
) |
|
|
14,796 |
|
|
|
(673 |
) |
|
|
33,248 |
|
|
|
(1,365 |
) |
| Taxable state and municipal bonds |
|
|
12,611 |
|
|
|
(153 |
) |
|
|
93,537 |
|
|
|
(7,774 |
) |
|
|
106,148 |
|
|
|
(7,927 |
) |
| Corporate bonds and other debt securities |
|
|
460 |
|
|
|
(10 |
) |
|
|
11,284 |
|
|
|
(407 |
) |
|
|
11,744 |
|
|
|
(417 |
) |
| |
|
$ |
91,154 |
|
|
$ |
(1,794 |
) |
|
$ |
410,063 |
|
|
$ |
(40,767 |
) |
|
$ |
501,217 |
|
|
$ |
(42,561 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Held to Maturity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury |
|
$ |
— |
|
|
$ |
— |
|
|
$ |
238,972 |
|
|
$ |
(12,277 |
) |
|
$ |
238,972 |
|
|
$ |
(12,277 |
) |
| Tax-exempt state and municipal bonds |
|
|
14,869 |
|
|
|
(206 |
) |
|
|
53,122 |
|
|
|
(3,117 |
) |
|
|
67,991 |
|
|
|
(3,323 |
) |
| |
|
$ |
14,869 |
|
|
$ |
(206 |
) |
|
$ |
292,094 |
|
|
$ |
(15,394 |
) |
|
$ |
306,963 |
|
|
$ |
(15,600 |
) |
| |
|
Less than 12 Months |
|
|
12 Months or More |
|
|
Total |
|
| |
|
Fair |
|
|
Unrealized |
|
|
Fair |
|
|
Unrealized |
|
|
Fair |
|
|
Unrealized |
|
| December 31, 2022 |
|
Value |
|
|
Loss |
|
|
Value |
|
|
Loss |
|
|
Value |
|
|
Loss |
|
| Available for Sale: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury and federal agency securities |
|
$ |
144,796 |
|
|
$ |
(6,230 |
) |
|
$ |
66,008 |
|
|
$ |
(10,080 |
) |
|
$ |
210,804 |
|
|
$ |
(16,310 |
) |
| U.S. 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 |
) |
|