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Securities - Additional Information (Details) |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2021 USD ($) security | Mar. 31, 2022 USD ($) security | Dec. 31, 2023 USD ($) security | Dec. 31, 2022 USD ($) security | Dec. 31, 2021 USD ($) security
Investments, Debt and Equity Securities [Abstract] |  |  |  |  |
Number of securities | security | 475 | 793 |  |  | 475
Aggregate fair value of securities | $ 490,200,000 | $ 120,900,000 |  |  | $ 490,200,000
Unrealized gains (losses) on securities | $ 5,900,000 | $ (814,000) | $ 41,150,000 | $ (118,006,000) | (24,117,000)
Number of securities in unrealized loss positions | security |  |  | 2,290 | 2,828 |
Unrealized loss positions |  |  | $ 2,100,000,000 | $ 2,600,000,000 |
Percentage of portfolio |  |  | 85.00% | 86.00% |
Allowance for credit losses for available for sale debt securities |  |  | $ 0 | $ 0 |
Allowance for credit loss |  |  | 157,000 |  |
Accrued interest receivable on available for sale debt securities |  |  | 14,700,000 | 17,800,000 |
Tax effect of the proceeds from sale of securities |  |  | 6,700,000 | $ 0 | $ 192,000
Pledged of fair value of securities as collateral |  |  | 145,200,000 |  |
Amortization cost of securities as collateral not separately reported |  |  | 170,300,000 |  |
Debt instrument repurchase agreement |  |  | 136,000,000 |  |
Securities pledged for federal home loan bank at fair value |  |  | 1,400,000,000 |  |
Securities for federal home loan bank not separately reported |  |  | 1,700,000,000 |  |
Debt instrument federal home loan bank |  |  | 430,000,000 |  |
Securities pledged for derivative at fair value |  |  | 20,200,000 |  |
Securities pledged for derivative at amortized cost |  |  | 23,000,000 |  |
Debt instrument derivative swap agreement |  |  | $ 26,600,000 |  |

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