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