Commitments and Contingencies Commitments (Details) $ in Thousands |
Sep. 30, 2026
USD ($)
|
|---|---|
| Lending related commitments [Line Items] | |
| Unused Commitments to Extend Credit | $ 5,519,341 |
| Commitments to fund loans | |
| Lending related commitments [Line Items] | |
| Unused Commitments to Extend Credit | 269,330 |
| Unfunded commitments under lines of credit | |
| Lending related commitments [Line Items] | |
| Unused Commitments to Extend Credit | 5,049,423 |
| Commercial and standby letters of credit | |
| Lending related commitments [Line Items] | |
| Unused Commitments to Extend Credit | $ 200,588 |