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Other Derivatives - Hedging instruments on statements of operations (Details) - Nonoperating Income (Expense) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Interest Rate Products |  |  |  |
Derivatives not designated as cash flow hedging instruments under Subtopic 815-20 |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | $ (40) | $ (7) | $ (326) | $ (7)
Other Contracts |  |  |  |
Derivatives not designated as cash flow hedging instruments under Subtopic 815-20 |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | (13) | (16) | (77) | (58)
Mortgage Banking |  |  |  |
Derivatives not designated as cash flow hedging instruments under Subtopic 815-20 |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | 6,015 | (380) | 6,015 | 316
Not Designated as Hedging Instrument |  |  |  |
Derivatives not designated as cash flow hedging instruments under Subtopic 815-20 |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | $ 5,962 | $ (403) | $ 5,612 | $ 251

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