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Commitments and Contingencies - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Loss Contingencies [Line Items] |  |  |  |  |
Reserve for unfunded commitments | $ 49,600,000 |  | $ 49,600,000 |  | $ 57,200,000
Minimum |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Total letters of credit and unfunded lending commitments | 0 |  | 0 |  |
Maximum |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Total letters of credit and unfunded lending commitments | 10,000,000 |  | 10,000,000 |  |
Total letters of credit and unfunded lending commitments |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Guarantor obligations, monetary amount | 28,770,000,000 | $ 27,780,000,000 | 85,830,000,000 | $ 87,280,000,000 |
Total letters of credit and unfunded lending commitments | $ 15,293,802,000 |  | $ 15,293,802,000 |  | $ 16,253,624,000

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