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Commitments and Contingencies (Tables) | 9 Months Ended
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Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Commitments and Letters of Credit | The following table sets forth our commitments and letters of credit as of the dates presented:
(dollars in thousands) | September 30, 2021 |  | December 31, 2020 |
Commitments to extend credit |  | $ | 2,500,541 |  |  |  | $ | 2,185,752 |  |
Standby letters of credit |  | 90,250 |  |  |  | 89,095 |  |
Total |  | $ | 2,590,791 |  |  |  | $ | 2,274,847 |  |
Allowance for Credit Loss for Unfunded Loan Commitments | The following table presents activity in the allowance for credit losses on unfunded loan commitments as of the dates presented:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(dollars in thousands) | 2021 |  | 2020 |  | 2021 |  | 2020
Balance at beginning of period |  | $ | 4,858 |  |  |  | $ | 7,004 |  |  |  | $ | 4,467 |  |  |  | $ | 3,112 |
Impact of adopting ASU 2016-13 at January 1, 2020 |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,349 |
Balance after adoption of ASU 2016-13 |  | 4,858 |  |  |  | 7,004 |  |  |  | 4,467 |  |  |  | 4,461 |
Provision for credit losses |  | 1,085 |  |  |  | (1,816) |  |  |  | 1,476 |  |  |  | 727 |
Total |  | $ | 5,943 |  |  |  | $ | 5,188 |  |  |  | $ | 5,943 |  |  |  | $ | 5,188 |

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