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Federal Home Loan Bank Advances and Other Borrowings (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022 | Sep. 01, 2022 | Aug. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | ---
Loan and Security Agreement | Revolving Line of Credit |  |  |  |  |
Federal Home Loan Bank Advances and Other Borrowings |  |  |  |  |
Bank stock (as a percent) |  |  |  |  | 100.00%
Borrowing capacity |  |  | $ 40.0 | $ 25.0 |
Outstanding balance under the revolving line of credit | $ 13.8 | $ 13.8 |  |  |
Federal Home Loan Bank Advances |  |  |  |  |
Federal Home Loan Bank Advances and Other Borrowings |  |  |  |  |
Principal balances | 1,370.0 | 1,200.0 |  |  |
Remaining available borrowings | $ 516.5 | $ 390.9 |  |  |

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- Definition Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480876/942-470-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22 (b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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