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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Debt) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Carrying Value |  |
Fair value disclosure |  |
Debt obligations | $ 290,206 | $ 268,441
Fair Value |  |
Fair value disclosure |  |
Debt obligations | 288,309 | 267,131
Level 2 | Credit Facility | Carrying Value |  |
Fair value disclosure |  |
Debt obligations | 70,000 | 70,000
Level 2 | Credit Facility | Fair Value |  |
Fair value disclosure |  |
Debt obligations | 70,000 | 70,000
Level 2 | Accounts receivable securitization borrowings | Carrying Value |  |
Fair value disclosure |  |
Debt obligations | 45,000 | 45,000
Level 2 | Accounts receivable securitization borrowings | Fair Value |  |
Fair value disclosure |  |
Debt obligations | 45,000 | 45,000
Level 2 | Notes payable | Carrying Value |  |
Fair value disclosure |  |
Debt obligations | 175,206 | 153,441
Level 2 | Notes payable | Fair Value |  |
Fair value disclosure |  |
Debt obligations | $ 173,309 | $ 152,131

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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=109250915&loc=d3e13433-108611 + Details
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