| Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] |
| | | March 31, 2025 | |
| | | | | | | Gross | | | Gross | | | | | |
| | | Amortized | | | Unrealized | | | Unrealized | | | Fair | |
| (in thousands) | | Cost | | | Gains | | | Losses | | | Value | |
| State and municipals | | $ | 151,123 | | | $ | 9 | | | $ | (17,573 | ) | | $ | 133,559 | |
| Pass-through mortgage securities | | | 156,532 | | | | 31 | | | | (25,368 | ) | | | 131,195 | |
| Collateralized mortgage obligations | | | 159,799 | | | | 853 | | | | (19,365 | ) | | | 141,287 | |
| SBA agency obligations | | | 95,216 | | | | 250 | | | | (1,022 | ) | | | 94,444 | |
| Corporate bonds | | | 119,000 | | | | — | | | | (4,135 | ) | | | 114,865 | |
| | | $ | 681,670 | | | $ | 1,143 | | | $ | (67,463 | ) | | $ | 615,350 | |
| | | December 31, 2024 | |
| State and municipals | | $ | 151,909 | | | $ | 8 | | | $ | (16,374 | ) | | $ | 135,543 | |
| Pass-through mortgage securities | | | 158,789 | | | | 8 | | | | (29,357 | ) | | | 129,440 | |
| Collateralized mortgage obligations | | | 166,014 | | | | 595 | | | | (21,550 | ) | | | 145,059 | |
| SBA agency obligations | | | 102,308 | | | | 262 | | | | (1,143 | ) | | | 101,427 | |
| Corporate bonds | | | 119,000 | | | | — | | | | (5,690 | ) | | | 113,310 | |
| | | $ | 698,020 | | | $ | 873 | | | $ | (74,114 | ) | | $ | 624,779 | |
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| Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] |
| | | March 31, 2025 | |
| | | Less than | | | 12 Months | | | | | | | | | |
| | | 12 Months | | | or More | | | Total | |
| | | Fair | | | Unrealized | | | Fair | | | Unrealized | | | Fair | | | Unrealized | |
| (in thousands) | | Value | | | Loss | | | Value | | | Loss | | | Value | | | Loss | |
| State and municipals | | $ | 14,051 | | | $ | (441 | ) | | $ | 116,155 | | | $ | (17,132 | ) | | $ | 130,206 | | | $ | (17,573 | ) |
| Pass-through mortgage securities | | | 7,639 | | | | (47 | ) | | | 120,123 | | | | (25,321 | ) | | | 127,762 | | | | (25,368 | ) |
| Collateralized mortgage obligations | | | — | | | | — | | | | 92,361 | | | | (19,365 | ) | | | 92,361 | | | | (19,365 | ) |
| SBA agency obligations | | | — | | | | — | | | | 77,636 | | | | (1,022 | ) | | | 77,636 | | | | (1,022 | ) |
| Corporate bonds | | | — | | | | — | | | | 114,865 | | | | (4,135 | ) | | | 114,865 | | | | (4,135 | ) |
| Total temporarily impaired | | $ | 21,690 | | | $ | (488 | ) | | $ | 521,140 | | | $ | (66,975 | ) | | $ | 542,830 | | | $ | (67,463 | ) |
| | | December 31, 2024 | |
| State and municipals | | $ | 14,719 | | | $ | (318 | ) | | $ | 117,168 | | | $ | (16,056 | ) | | $ | 131,887 | | | $ | (16,374 | ) |
| Pass-through mortgage securities | | | 9,364 | | | | (179 | ) | | | 119,191 | | | | (29,178 | ) | | | 128,555 | | | | (29,357 | ) |
| Collateralized mortgage obligations | | | 3,726 | | | | (33 | ) | | | 92,366 | | | | (21,517 | ) | | | 96,092 | | | | (21,550 | ) |
| SBA agency obligations | | | — | | | | — | | | | 83,439 | | | | (1,143 | ) | | | 83,439 | | | | (1,143 | ) |
| Corporate bonds | | | — | | | | — | | | | 113,310 | | | | (5,690 | ) | | | 113,310 | | | | (5,690 | ) |
| Total temporarily impaired | | $ | 27,809 | | | $ | (530 | ) | | $ | 525,474 | | | $ | (73,584 | ) | | $ | 553,283 | | | $ | (74,114 | ) |
Following is a discussion of unrealized losses by type of security, none of which are considered impaired at March 31, 2025.
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