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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Debt) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Carrying Value |  |
Fair value disclosure |  |
Debt obligations | $ 282,054 | $ 291,409
Fair Value |  |
Fair value disclosure |  |
Debt obligations | 285,456 | 291,560
Credit Facility | Level 2 | Carrying Value |  |
Fair value disclosure |  |
Debt obligations | 70,000 | 70,000
Credit Facility | Level 2 | Fair Value |  |
Fair value disclosure |  |
Debt obligations | 70,000 | 70,000
Accounts receivable securitization borrowings | Level 2 | Carrying Value |  |
Fair value disclosure |  |
Debt obligations | 40,000 | 40,000
Accounts receivable securitization borrowings | Level 2 | Fair Value |  |
Fair value disclosure |  |
Debt obligations | 40,000 | 40,000
Notes payable | Level 2 | Carrying Value |  |
Fair value disclosure |  |
Debt obligations | 172,054 | 181,409
Notes payable | Level 2 | Fair Value |  |
Fair value disclosure |  |
Debt obligations | $ 175,456 | $ 181,560

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 + Details
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