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Regulatory Capital - Narrative (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 01, 2020 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |  |
Allowance for credit losses on loans and leases |  | $ 1,435,920 | $ 1,339,772 | $ 1,357,075 | $ 1,165,335
Liability for unfunded commitments |  | 84,568 | 112,962 | 124,924 | $ 72,713
Deferred tax asset |  | 465,379 | 433,581 |  |
Unrealized gain (loss) |  | (83,000) | (115,000) |  |
Gain (loss) OCI after adjustment tax |  | (27,000) | (37,000) |  |
Dividends |  | $ 570,000 | $ 550,000 | $ 700,000 |
Accounting Standards Update 2016-13 |  |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |  |
Period of deferment | 2 years |  |  |  |
Amount deferred | 25.00% |  |  |  |
Allowance for credit losses on loans and leases | $ 1,100,000 |  |  |  |
Liability for unfunded commitments | 116,000 |  |  |  |
Deferred tax asset | 306,000 |  |  |  |
Reduction to retained earnings | $ 953,000 |  |  |  |

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