| Segment Reporting [Table Text Block] |
| | Consolidated Bank | | | Consolidated Bank | |
| | Three Months Ended September 30, | | | Nine Months Ended September 30, | |
| | 2026 | | | 2025 | | | 2026 | | | 2025 | |
(dollars in thousands) | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | |
Interest income | | $ | 200,141 | | | $ | 187,709 | | | $ | 577,445 | | | $ | 458,528 | |
Noninterest income | | | (14,339 | ) | | | 17,880 | | | | 236 | | | | 26,494 | |
Total segment income | | $ | 185,802 | | | $ | 205,589 | | | $ | 577,681 | | | $ | 485,022 | |
| | | | | | | | | | | | | | | | |
Less: | | | | | | | | | | | | | | | | |
Interest expense | | | 78,505 | | | | 79,778 | | | | 224,698 | | | | 201,299 | |
Segment net interest income and noninterest income | | | 107,297 | | | | 125,811 | | | | 352,983 | | | | 283,723 | |
Less: | | | | | | | | | | | | | | | | |
Provision for credit losses | | | 5,000 | | | | 5,500 | | | | 18,500 | | | | 44,700 | |
Salaries and employee benefits | | | 32,922 | | | | 32,401 | | | | 97,227 | | | | 80,212 | |
Other segment items* | | | 22,841 | | | | 26,540 | | | | 71,787 | | | | 90,914 | |
Income tax expense (benefit) | | | 11,032 | | | | 16,277 | | | | 41,923 | | | | 18,449 | |
Segment consolidated net income (loss) | | $ | 35,502 | | | $ | 45,093 | | | $ | 123,546 | | | $ | 49,448 | |
| | | | | | | | | | | | | | | | |
Other segment disclosures | | | | | | | | | | | | | | | | |
Interest income | | $ | 200,141 | | | $ | 187,709 | | | $ | 577,445 | | | $ | 458,528 | |
Interest expense | | | 78,505 | | | | 79,778 | | | | 224,698 | | | | 201,299 | |
Depreciation | | | 1,705 | | | | 1,841 | | | | 5,292 | | | | 4,264 | |
Amortization of core deposit intangibles | | | 2,846 | | | | 3,196 | | | | 8,536 | | | | 4,726 | |
Other significant noncash items: | | | | | | | | | | | | | | | | |
Provision for credit losses | | | 5,000 | | | | 5,500 | | | | 18,500 | | | | 44,700 | |
Segment assets | | | 14,766,626 | | | | 14,013,611 | | | | 14,766,626 | | | | 14,013,611 | |
Total expenses for segment assets | | | 150,300 | | | | 160,496 | | | | 454,135 | | | | 435,574 | |
| | | | | | | | | | | | | | | | |
Reconciliation of assets | | | | | | | | | | | | | | | | |
Total assets for segment | | $ | 14,766,626 | | | $ | 14,013,611 | | | $ | 14,766,626 | | | $ | 14,013,611 | |
Other assets | | | 12,079 | | | | 9,974 | | | | 12,079 | | | | 9,974 | |
Total consolidated assets | | $ | 14,778,705 | | | $ | 14,023,585 | | | $ | 14,778,705 | | | $ | 14,023,585 | |
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