| Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
| | | Three Months Ended June 30, 2026 | | | Three Months Ended June 30, 2025 | |
| | | Pre-tax | | | Tax expense | | | Net-of-tax | | | Pre-tax | | | Tax expense | | | Net-of-tax | |
| | | ($ In thousands) | |
| Beginning balance, loss, net of tax | | | | | | | | | | | | | | | | | | | | | | | | |
| Securities AFS | | | | | | | | | | $ | (44,178 | ) | | | | | | | | | | $ | (71,747 | ) |
| Total | | | | | | | | | | $ | (44,178 | ) | | | | | | | | | | $ | (71,747 | ) |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Net unrealized (losses)/gains on AFS securities arising during the period | | | (2,229 | ) | | | (659 | ) | | | (1,570 | ) | | | 3,585 | | | | 1,060 | | | | 2,525 | |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Reclassification adjustment for net losses on AFS securities in net income | | | 10,554 | | | | 3,120 | | | | 7,434 | | | | - | | | | - | | | | - | |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Ending balance, loss, net of tax | | | | | | | | | | | | | | | | | | | | | | | | |
| Securities AFS | | | | | | | | | | $ | (38,314 | ) | | | | | | | | | | $ | (69,222 | ) |
| Total | | | | | | | | | | $ | (38,314 | ) | | | | | | | | | | $ | (69,222 | ) |
| | | Six Months Ended June 30, 2026 | | | Six Months Ended June 30, 2025 | |
| | | Pre-tax | | | Tax expense | | | Net-of-tax | | | Pre-tax | | | Tax expense/ (benefit) | | | Net-of-tax | |
| | | ($ In thousands) | |
| Beginning balance, (loss)/gain, net of tax | | | | | | | | | | | | | | | | | | | | | | | | |
| Securities AFS | | | | | | | | | | $ | (54,400 | ) | | | | | | | | | | $ | (85,607 | ) |
| Total | | | | | | | | | | $ | (54,400 | ) | | | | | | | | | | $ | (85,607 | ) |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Net unrealized (losses)/ gains on AFS securities arising during the period | | | (3,403 | ) | | | (1,006 | ) | | | (2,397 | ) | | $ | 23,261 | | | $ | 6,876 | | | $ | 16,385 | |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Reclassification adjustment for net losses on AFS securities in net income | | | 26,239 | | | | 7,756 | | | | 18,483 | | | | - | | | | - | | | | - | |
| | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Ending balance, loss, net of tax | | | | | | | | | | | | | | | | | | | | | | | | |
| Securities AFS | | | | | | | | | | $ | (38,314 | ) | | | | | | | | | | $ | (69,222 | ) |
| Total | | | | | | | | | | $ | (38,314 | ) | | | | | | | | | | $ | (69,222 | ) |
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