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Derivative Instruments and Hedge Activities - Summary of Cash Flow Hedges (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Derivative [Line Items] |  |
Notional Amount | $ 866,486 | $ 391,847
Gross amounts recognized | 13,463 | 17,149
Derivative liabilities fair value | 12,348 | $ 18,133
Cash Flow Hedges |  |
Derivative [Line Items] |  |
Notional Amount | 400,000 |
Gross amounts recognized | 1,799 |
Derivative liabilities fair value | $ 192 |
Weighted average pay rates | 0.98% |
Weighted average maturity | 5 years 2 months 12 days |

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