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Investment Securities - Narrative (Details) | Sep. 30, 2024 USD ($) security | Dec. 31, 2023 USD ($) security
--- | --- | ---
Debt and Equity Securities, FV-NI [Line Items] |  |
Accrued interest receivable | $ 52,228,000 | $ 52,715,000
Trade date receivables settled after period end | 365,000 | 0
Trade date payables settled after period end | 0 | 0
Allowance for credit losses on investments | $ 0 | $ 0
Number of securities in securities portfolio | security | 266 | 439
Number of securities in securities portfolio, unrealized loss position | security | 207 | 370
Equity securities without readily determinable market value | $ 23,301,000 | $ 25,191,000
Equity method investments | 20,000,000 |
Federal home loan bank stock | 32,859,000 | 34,190,000
Collateral Pledged |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Securities pledged | 1,057,384,000 | 929,546,000
Debt Securities |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Accrued interest receivable | $ 5,848,000 | $ 7,212,000

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