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Commitments and Contingencies (Tables) | 3 Months Ended
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Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract] |
Summary of Outstanding Commitments to Extend Credit and Letters of Credit | The following table presents the Corporation's commitments to extend credit and letters of credit:
| March 31, 2021 |  | December 31, 2020
| (in thousands)
Commitments to extend credit | $ | 9,018,523 |  |  | $ | 8,651,055 |
Standby letters of credit | 295,516 |  |  | 298,750 |
Commercial letters of credit | 57,917 |  |  | 56,229 |

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