FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Carrying Value
Fair value disclosure
Debt obligations	$ 533,908	$ 323,504
Fair Value
Fair value disclosure
Debt obligations	541,437	326,432
Credit Facility | Level 2 | Carrying Value
Fair value disclosure
Debt obligations	250,000	70,000
Credit Facility | Level 2 | Fair Value
Fair value disclosure
Debt obligations	250,000	70,000
Accounts receivable securitization borrowings | Level 2 | Carrying Value
Fair value disclosure
Debt obligations	85,000	40,000
Accounts receivable securitization borrowings | Level 2 | Fair Value
Fair value disclosure
Debt obligations	85,000	40,000
Notes payable | Level 2 | Carrying Value
Fair value disclosure
Debt obligations	198,908	213,504
Notes payable | Level 2 | Fair Value
Fair value disclosure
Debt obligations	$ 206,437	$ 216,432