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Derivatives, Hedging Activities, and Other Financial Instruments - Notional and Fair Value of Derivatives Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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Other assets |  |
Derivative [Line Items] |  |
Credit risk derivative asset, fair value | $ 56,087 | $ 10,141
Other liabilities |  |
Derivative [Line Items] |  |
Credit risk derivative liability, fair value | $ 56,306 | $ 10,708

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