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Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Customers
Derivative Asset
Estimated Fair Value	$ 13,000	$ 25,400
Third Parties
Derivative Asset
Estimated Fair Value		(25,900)
Derivative Liability
Estimated Fair Value	(13,200)
Interest rate swap
Derivative Asset
Estimated Fair Value	17,843
Derivative Liability
Estimated Fair Value	(17,970)
Interest rate swap | Non-hedging interest rate derivatives
Derivative Asset
Notional Amounts	323,706	308,126
Estimated Fair Value		25,740
Derivative Liability
Notional Amounts	$ 323,706	308,126
Estimated Fair Value		$ (26,162)

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Nominal or face amount used to calculate payments on the derivative asset.

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-Publisher FASB
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