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v3.23.3

Borrowing Arrangements Narrative (Details) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 USD ($) credit_line oustanding_letters_of_credit | Dec. 31, 2022 USD ($)
Line of Credit Facility [Line Items] |  |
Number of credit lines maintained by the Company | credit_line | 3 |
Federal funds purchased | $ 0 | $ 0
Letters of Credit, Federal Home Loan Bank, as collateral | $ 0 |
Maturity of repurchase agreements (less than) | 2 years |
Securities sold under repurchase agreements | $ 103,900,000 | 33,200,000
Federal Home Loan Bank borrowings, additional funding available | 1,710,000,000 |
Frost Bank |  |
Line of Credit Facility [Line Items] |  |
Line of credit, maximum borrowing capacity | 40,000,000 |
Line of credit, capacity available for issuance of letters of credit | $ 5,000,000 |
Number of outstanding letters of credit | oustanding_letters_of_credit | 1 |
Letters of Credit Outstanding, Amount | $ 155,000 |
TIB - The Independent Bankers Bank |  |
Line of Credit Facility [Line Items] |  |
Line of credit, maximum borrowing capacity | 15,000,000 |
Comerica Bank |  |
Line of Credit Facility [Line Items] |  |
Line of credit, maximum borrowing capacity | 7,500,000 |
Federal Reserve Discount Window |  |
Line of Credit Facility [Line Items] |  |
Additional funding available | 636,900,000 |
Federal Reserve Bank Term Funding Program |  |
Line of Credit Facility [Line Items] |  |
Additional funding available | $ 6,000 |
Minimum |  |
Line of Credit Facility [Line Items] |  |
Federal Home Loan Bank borrowings interest rates | 0.74% |
Federal Home Loan Bank borrowings maturities | 20 days |
Maximum |  |
Line of Credit Facility [Line Items] |  |
Federal Home Loan Bank borrowings interest rates | 4.80% |
Federal Home Loan Bank borrowings maturities | 4 years 9 months 18 days |
Federal Reserve Discount Window |  |
Line of Credit Facility [Line Items] |  |
Other borrowings | $ 0 | $ 188,000,000
Federal Reserve Bank Term Funding Program |  |
Line of Credit Facility [Line Items] |  |
Other borrowings | $ 291,300,000 |

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