Loans and Allowance for Credit Losses (ALLL Rollforward) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Allowance for Loan and Lease Losses [Roll Forward] | ||||
| Beginning balance | $ 208,790 | $ 219,747 | $ 219,825 | $ 223,153 |
| Provision (recovery) | 15,098 | 15,694 | 40,200 | 31,657 |
| Charge-offs | (10,390) | (14,259) | (47,186) | (37,016) |
| Recoveries | 4,018 | 1,548 | 4,677 | 4,936 |
| Ending balance | 217,516 | 222,730 | 217,516 | 222,730 |
| Commercial | ||||
| Allowance for Loan and Lease Losses [Roll Forward] | ||||
| Beginning balance | 198,459 | 204,180 | 208,412 | 211,203 |
| Provision (recovery) | 13,054 | 17,292 | 39,238 | 29,638 |
| Charge-offs | (10,390) | (14,051) | (47,186) | (36,808) |
| Recoveries | 4,018 | 1,540 | 4,677 | 4,928 |
| Ending balance | 205,141 | 208,961 | 205,141 | 208,961 |
| Residential | ||||
| Allowance for Loan and Lease Losses [Roll Forward] | ||||
| Beginning balance | 10,331 | 15,567 | 11,413 | 11,950 |
| Provision (recovery) | 2,044 | (1,598) | 962 | 2,019 |
| Charge-offs | 0 | (208) | 0 | (208) |
| Recoveries | 0 | 8 | 0 | 8 |
| Ending balance | $ 12,375 | $ 13,769 | $ 12,375 | $ 13,769 |