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Derivative Financial Instruments (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Customers |  |
Derivative Asset |  |
Estimated Fair Value | $ 9,500 | $ 25,400
Third Parties |  |
Derivative Asset |  |
Estimated Fair Value |  | (25,900)
Derivative Liability |  |
Estimated Fair Value | (9,700) |
Interest rate swap |  |
Derivative Asset |  |
Estimated Fair Value | 16,955 |
Derivative Liability |  |
Estimated Fair Value | (17,133) |
Interest rate swap | Non-hedging interest rate derivatives |  |
Derivative Asset |  |
Notional Amounts | 315,681 | 308,126
Estimated Fair Value |  | 25,740
Derivative Liability |  |
Notional Amounts | $ 315,681 | 308,126
Estimated Fair Value |  | $ (26,162)

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