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v3.23.1

Investment Securities - Additional Information (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 USD ($) security instrument | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($)
Summary of Investment Holdings [Line Items] |  |  |
Transferred from available-for-sale to held-for-maturity | $ 143,000,000 |  |
Allowance for credit losses for available-for-sale debt securities | 0 |  | $ 0
Allowance for securities held-to-maturity | (150,000) |  | (150,000)
Accrued interest receivable | $ 39,100,000 |  | 50,900,000
Number of securities in security portfolio | security | 3,093 |  |
Number of securities in unrealized loss position | security | 2,688 |  |
Fair Value | $ 6,687,066,000 |  | 6,773,712,000
Unrealized losses | 817,596,000 |  | 847,474,000
Equity securities, at fair value | 72,158,000 |  | 52,507,000
Losses on equity securities | (800,000) | $ (1,900,000) |
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 | 395,900,000 |  | 396,800,000
Other Assets | Partnership Interest |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Equity securities without readily determinable fair value | 243,400,000 |  |
Other Assets | Initiatives in Low-to-Moderate Income Neighborhoods |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Equity securities without readily determinable fair value | $ 152,500,000 |  |
Pooled trust preferred securities |  |  |
Summary of Investment Holdings [Line Items] |  |  |
Number of instruments held | instrument | 2 |  |
Fair Value | $ 10,849,000 |  | 10,811,000
Unrealized losses | $ 2,938,000 |  | $ 2,972,000

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