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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Debt) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Carrying Value |  |
Fair value disclosure |  |
Debt obligations | $ 211,703 | $ 126,759
Fair Value |  |
Fair value disclosure |  |
Debt obligations | 211,495 | 126,743
Level 2 | Credit Facility | Carrying Value |  |
Fair value disclosure |  |
Debt obligations | 70,000 |
Level 2 | Credit Facility | Fair Value |  |
Fair value disclosure |  |
Debt obligations | 70,000 |
Level 2 | Term Loan | Carrying Value |  |
Fair value disclosure |  |
Debt obligations |  | 70,000
Level 2 | Term Loan | Fair Value |  |
Fair value disclosure |  |
Debt obligations |  | 70,000
Level 2 | Accounts receivable securitization program | Carrying Value |  |
Fair value disclosure |  |
Debt obligations | 35,000 |
Level 2 | Accounts receivable securitization program | Fair Value |  |
Fair value disclosure |  |
Debt obligations | 35,000 |
Level 2 | Notes payable | Carrying Value |  |
Fair value disclosure |  |
Debt obligations | 106,703 | 56,759
Level 2 | Notes payable | Fair Value |  |
Fair value disclosure |  |
Debt obligations | $ 106,495 | $ 56,743

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