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Other Derivatives - Hedging instruments on statements of operations (Details) - Other income / (expense) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain or (Loss) Recognized in Income on Derivative | $ 5,398 | $ 245
Interest rate products |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain or (Loss) Recognized in Income on Derivative | 153 | (8)
Mortgage banking derivatives |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain or (Loss) Recognized in Income on Derivative | 5,213 | 280
Other contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain or (Loss) Recognized in Income on Derivative | $ 32 | $ (27)

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