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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Financial Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Carrying Value
Fair value disclosure
Debt obligations	$ 291,409	$ 268,441
Fair Value
Fair value disclosure
Debt obligations	291,560	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	40,000	45,000
Level 2 | Accounts receivable securitization borrowings | Fair Value
Fair value disclosure
Debt obligations	40,000	45,000
Level 2 | Notes payable | Carrying Value
Fair value disclosure
Debt obligations	181,409	153,441
Level 2 | Notes payable | Fair Value
Fair value disclosure
Debt obligations	$ 181,560	$ 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

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