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v3.23.1

Available-for-Sale and Held-to-Maturity Securities (Narrative) (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 USD ($) Security | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($)
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items] |  |  |
Accrued interest receivable | $ 82,600,000 |  | $ 65,700,000
Proceeds from sale of available-for-sale securities | 10,000,000.0 |  |
Net realized gains (loss) resulting from sale of available-for-sale securities | 7,600,000 | $ 0 |
Financial instruments pledged as collateral | $ 796,600,000 |  | 796,200,000
Number of available for sale securities whose amortized costs exceeded their fair values | Security | 273 |  |
Available-for-sale Securities, Continuous | $ 196,861,000 |  |
Available-for-sale Securities, Continuous Unrealized | 188,738,000 |  |
Available-for-sale Securities, Continuous | $ 1,580,709,000 |  |
Percentage of available-for-sale portfolio | 97.30% |  |
Pledged [Member] |  |  |
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items] |  |  |
Trading securities pledged | $ 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 | $ 84,600,000 |  | $ 82,300,000

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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
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