DERIVATIVES (Details) - Non Designated Derivative Instruments [Member] - USD ($) $ in Thousands |
Jun. 30, 2018 |
Dec. 31, 2017 |
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| Cash Collateral Balance [Member] | ||
| Derivative assets | $ 5,746 | $ 3,813 |
| Commodity Contracts [Member] | ||
| Derivative assets | 7,634 | 998 |
| Derivative liabilities | $ 10,157 | $ 2,307 |
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- Definition Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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