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Derivative Financial Instruments - Summary of the interest-rate swaps designated as cash flow hedges (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Interest Rate Swap |  |  |  |  |
Balances carried in AOCI |  |  |  |  |
Unrealized gains (losses) on cash flow hedges, net of tax | $ 0 | $ 0 | $ 0 | $ 0 |
Cash Flow Hedging | Interest Rate Swap |  |  |  |  |
Balances carried in AOCI |  |  |  |  |
Unrealized gains (losses) on cash flow hedges, net of tax |  |  | (25,092) |  | $ (20,985)
Cash Flow Hedging | Interest Rate Swap | Other assets |  |  |  |  |
Gross aggregate fair value of the swaps |  |  |  |  |
Gross aggregate fair value of swap assets | 1,886 |  | 1,886 |  | 2,535
Cash Flow Hedging | Interest Rate Swap | Other liabilities |  |  |  |  |
Gross aggregate fair value of the swaps |  |  |  |  |
Gross aggregate fair value of swap liabilities | 37,725 |  | 37,725 |  | 32,367
Cash Flow Hedging | Debt Swap |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional amount | $ 50,000 |  | $ 50,000 |  | $ 50,000
Weighted average fixed pay/receive rates | 1.79% |  | 1.79% |  | 1.79%
Weighted average variable interest rates | 5.55% |  | 5.55% |  | 4.77%
Weighted average maturity |  |  | 11 months 15 days |  | 1 year 8 months 15 days
Cash Flow Hedging | Loan Swap |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional amount | $ 300,000 |  | $ 300,000 |  | $ 300,000
Weighted average fixed pay/receive rates | 4.81% |  | 4.81% |  | 4.81%
Weighted average variable interest rates | 8.50% |  | 8.50% |  | 7.32%
Weighted average maturity |  |  | 5 years 4 months 6 days |  | 6 years 1 month 6 days

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