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v3.22.2.2

Investment Securities - Additional Information (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 USD ($) security | Sep. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) security | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($)
Summary of Investment Holdings [Line Items] |  |  |  |  |
Investment securities held to maturity | $ 3,096,567,000 |  | $ 3,096,567,000 |  | $ 0
Fair value of securities transferred to held-for-maturity |  |  | 3,000,000,000 |  |
Unrealized loss |  |  | 125,200,000 |  |
Transferred from available-for-sale to held-for-maturity | 154,700,000 |  | 154,700,000 |  |
Allowance for credit losses for available-for-sale debt securities | 0 |  | 0 |  | 0
Allowance for securities held-to-maturity | (150,000) |  | (150,000) |  |
Accrued interest receivable | $ 39,900,000 |  | $ 39,900,000 |  | 35,500,000
Number of securities in security portfolio | security | 3,201 |  | 3,201 |  |
Number of securities in unrealized loss position | security | 2,970 |  | 2,970 |  |
Equity securities, at fair value | $ 51,846,000 |  | $ 51,846,000 |  | 13,211,000
(Losses) gains on equity securities | (700,000) | $ 100,000 | (4,900,000) | $ 300,000 |
Impairments on equity securities without readily determinable fair value |  |  | 0 | $ 0 |
Other Assets |  |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |  |
Equity securities without readily determinable fair value | 322,300,000 |  | 322,300,000 |  | $ 186,000,000
Other Assets | Partnership Interest |  |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |  |
Equity securities without readily determinable fair value | 185,900,000 |  | 185,900,000 |  |
Other Assets | Initiatives in Low-to-Moderate Income Neighborhoods |  |  |  |  |
Summary of Investment Holdings [Line Items] |  |  |  |  |
Equity securities without readily determinable fair value | $ 136,400,000 |  | $ 136,400,000 |  |

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