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Federal Home Loan Bank Advances - Additional Information (Details) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) advance | Sep. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
Federal Home Loan Bank, Advances [Line Items] |  |  |
Weighted-average rates of FHLB advances |  | 1.30% | 1.32%
Modifications, amount | $ 50.0 |  |
Modifications, number of contracts | advance | 2 |  |
Weighted average interest rate | 0.33% |  | 1.53%
Modifications, unamortized prepayment fees |  | $ 27.7 | $ 30.0
FHLB Advances |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Percentage of borrowings collateralized by investment securities and residential real estate loans |  | 140.00% |

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- Definition Advances From Federal Home Loan Banks, Modifications, Amount + References No definition available. + Details
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- Definition Advances From Federal Home Loan Banks, Modifications, Number Of Contracts + References No definition available. + Details
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- Definition Advances From Federal Home Loan Banks, Modifications, Unamortized Prepayment Fees + References No definition available. + Details
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- Definition Amount of collateral pledged as a percentage of outstanding secured debt. + References No definition available. + Details
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- Definition The calculated weighted average interest rate for Federal Home Loan Bank advances outstanding as of the Balance Sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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