DERIVATIVE FINANCIAL INSTRUMENTS - Effects of offsetting (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Gross amounts offset in the consolidated balance sheets
Gross amounts of recognized assets or Gross amounts offset in the condensed consolidated balance sheets		$ 566
Gross amounts of recognized liabilities or Gross amounts offset in the consolidated balance sheets	$ 340
Net amounts of assets presented in the consolidated balance sheets	340	566
Gross amounts not offset in the consolidated balance sheets
Net amount	$ 340	$ 566

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The net amount as of the balance sheet date of the fair value of derivative assets and derivative liabilities that in accordance with the entity's accounting policy were offset against collateral under a master netting arrangement.

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Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, after effects of master netting arrangements, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against an obligation to return collateral. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after effects of master netting arrangements, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against the right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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