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(Income Statement) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
DERIVATIVES |  |  |
Amount of Gain (Loss) Recognized in Earnings on Derivatives | $ 83 | $ (324) | $ 294
Derivative instruments not designated as hedging instruments. | Derivatives - Interest rate contracts |  |  |
DERIVATIVES |  |  |
Amount of Gain (Loss) Recognized in Earnings on Derivatives | $ 83 | $ (324) |

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