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Loans - Narrative (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) risk-ratingGrade loan | Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($)
Loans and Allowance for Loan Losses (Additional Textual) [Abstract] |  |  |
Number of restructured loans | loan | 0 | 1,000 |
Restructured loans discontinued past due period | 90 days | 90 days |
Outstanding balance of restructured loans | $ 11,386,214,000 | $ 9,856,743,000 |
Modifications, recorded investment | 22,624,000 | 20,259,000 | $ 20,448,000
Modifications, subsequent default, recorded investment | 491,000 | 117,000 | 522,000
Allowance for credit losses on interest deferred | 192,090,000 | 164,171,000 | $ 176,144,000
Remaining availability under commitments to lend additional funds on restructured loans | 0 | 307,000 |
Unfunded commitment | 7,387,000 | 10,471,000 |
Acquisition, at fair value | $ 105,610,000 |  |
Special Mention |  |  |
Loans and Allowance for Loan Losses (Additional Textual) [Abstract] |  |  |
Financing receivable, credit quality risk rating grade | risk-ratingGrade | 70 |  |
Minimum | Internal Investment Grade |  |  |
Loans and Allowance for Loan Losses (Additional Textual) [Abstract] |  |  |
Financing receivable, credit quality risk rating grade | risk-ratingGrade | 10 |  |
Minimum | Pass |  |  |
Loans and Allowance for Loan Losses (Additional Textual) [Abstract] |  |  |
Financing receivable, credit quality risk rating grade | risk-ratingGrade | 10 |  |
Minimum | Substandard |  |  |
Loans and Allowance for Loan Losses (Additional Textual) [Abstract] |  |  |
Financing receivable, credit quality risk rating grade | risk-ratingGrade | 80 |  |
Maximum | Internal Investment Grade |  |  |
Loans and Allowance for Loan Losses (Additional Textual) [Abstract] |  |  |
Financing receivable, credit quality risk rating grade | risk-ratingGrade | 95 |  |
Maximum | Pass |  |  |
Loans and Allowance for Loan Losses (Additional Textual) [Abstract] |  |  |
Financing receivable, credit quality risk rating grade | risk-ratingGrade | 60 |  |
Maximum | Substandard |  |  |
Loans and Allowance for Loan Losses (Additional Textual) [Abstract] |  |  |
Financing receivable, credit quality risk rating grade | risk-ratingGrade | 95 |  |
Nonaccruing Loans |  |  |
Loans and Allowance for Loan Losses (Additional Textual) [Abstract] |  |  |
Outstanding balance of restructured loans |  | 36,000 |
Restructured Loans |  |  |
Loans and Allowance for Loan Losses (Additional Textual) [Abstract] |  |  |
Outstanding balance of restructured loans | $ 20,765,000 | 25,702,000 |
Allowance for credit losses on interest deferred | $ 625,000 | $ 389,000 |

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