| Segment Reporting [Table Text Block] |
| | | Consolidated Bank | |
| | | Three Months Ended March 31, | |
| | | 2026 | | | 2025 | |
| (dollars in thousands) | | | | | | | | |
| | | | | | | | | |
| Interest income | | $ | 184,397 | | | $ | 124,789 | |
| Noninterest income | | | 6,661 | | | | 3,749 | |
| Total segment income | | $ | 191,058 | | | $ | 128,538 | |
| | | | | | | | | |
| Less: | | | | | | | | |
| Interest expense | | | 71,208 | | | | 57,735 | |
| Segment net interest income and noninterest income | | | 119,850 | | | | 70,803 | |
| Less: | | | | | | | | |
| Provision for credit losses | | | 5,200 | | | | 3,500 | |
| Salaries and employee benefits | | | 32,768 | | | | 22,578 | |
| Other segment items* | | | 25,151 | | | | 16,332 | |
| Income tax (benefit) expense | | | 14,708 | | | | 7,160 | |
| Segment consolidated net (loss) income | | $ | 42,023 | | | $ | 21,233 | |
| | | | | | | | | |
| Other segment disclosures | | | | | | | | |
| Interest income | | $ | 184,397 | | | $ | 124,789 | |
| Interest expense | | | 71,208 | | | | 57,735 | |
| Depreciation | | | 1,806 | | | | 1,098 | |
| Amortization of core deposit intangibles | | | 2,845 | | | | 279 | |
| Other significant noncash items: | | | | | | | | |
| Provision for credit losses | | | 5,200 | | | | 3,500 | |
| Segment assets | | | 14,200,455 | | | | 9,751,832 | |
| Total expenses for segment assets | | | 149,035 | | | | 107,306 | |
| | | | | | | | | |
| Reconciliation of assets | | | | | | | | |
| Total assets for segment | | $ | 14,200,455 | | | $ | 9,751,832 | |
| Other assets | | | 9,106 | | | | 7,423 | |
| Total consolidated assets | | $ | 14,209,561 | | | $ | 9,759,255 | |
|