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v3.23.3

Available-for-Sale and Held-to-Maturity Securities (Narrative) (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 USD ($) Security | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) Security | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($)
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items] |  |  |  |  |
Accrued interest receivable | $ 78,200,000 |  | $ 78,200,000 |  | $ 65,700,000
Proceeds from sale of available-for-sale securities | 0 | $ 80,000,000 | 10,000,000 | $ 80,000,000 |
Net realized gains (loss) resulting from sale of available-for-sale securities |  | $ 100,000 | (7,600,000) | $ 100,000 |
Financial instruments pledged as collateral | $ 721,000,000 |  | $ 721,000,000 |  | 796,200,000
Number of available for sale securities whose amortized costs exceeded their fair values | Security | 284 |  | 284 |  |
Available-for-sale Securities, Continuous | $ 250,511,000 |  | $ 250,511,000 |  |
Available-for-sale Securities, Continuous Unrealized | 247,335,000 |  | 247,335,000 |  |
Available-for-sale Securities, Continuous | $ 1,509,735,000 |  | $ 1,509,735,000 |  |
Percentage of available-for-sale portfolio | 99.80% |  | 99.80% |  |
Held-to-Maturity, allowance for credit Loss | $ 0 |  | $ 0 |  |
Available-for-Sale, allowance for credit Loss | 0 |  | 0 |  |
Pledged [Member] |  |  |  |  |
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items] |  |  |  |  |
Trading securities pledged | 1,300,000,000 |  | 1,300,000,000 |  | 1,300,000,000
Other Assets [Member] |  |  |  |  |
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items] |  |  |  |  |
Accrued interest receivable | $ 94,800,000 |  | $ 94,800,000 |  | $ 82,300,000

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