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v3.25.2

Available-for-Sale and Held-to-Maturity Securities (Narrative) (Details) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2025 USD ($) Security | Jun. 30, 2024 USD ($) | Jun. 30, 2025 USD ($) Security | Jun. 30, 2024 USD ($) | Dec. 31, 2024 USD ($) | Dec. 21, 2024 USD ($)
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items] |  |  |  |  |  |
Allowance for credit losses | $ 0 |  | $ 0 |  |  |
Accrued interest receivable | 90,600,000 |  | 90,600,000 |  |  | $ 92,600,000
Proceeds from sale of available-for-sale securities | 0 | $ 0 | 0 | $ 0 |  |
Financial instruments pledged as collateral | $ 818,300,000 |  | $ 818,300,000 |  | $ 842,300,000 |
Number of available for sale securities whose amortized costs exceeded their fair values | Security | 227 |  | 227 |  |  |
Available-for-sale Securities, Continuous | $ 132,065,000 |  | $ 132,065,000 |  |  |
Available-for-sale Securities, Continuous Unrealized | 131,460,000 |  | 131,460,000 |  |  |
Available-for-sale Securities, Continuous | $ 1,206,523,000 |  | $ 1,206,523,000 |  |  |
Percentage of available-for-sale portfolio | 78.00% |  | 78.00% |  |  |
Pledged [Member] |  |  |  |  |  |
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items] |  |  |  |  |  |
Trading securities pledged | $ 2,500,000,000 |  | $ 2,500,000,000 |  | 2,200,000,000 |
Other Assets [Member] |  |  |  |  |  |
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items] |  |  |  |  |  |
Accrued interest receivable | $ 95,500,000 |  | $ 95,500,000 |  | $ 106,800,000 |

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