DEBT (Margins and Floor Rates for Financing Facilities) (Details)	12 Months Ended
	Dec. 31, 2017
Base Rate [Member] | Floor [Member]
Debt instrument, basis spread on variable rate	2.00%
Base Rate [Member] | Applicable Margin [Member]
Debt instrument, basis spread on variable rate	3.25%
London Interbank Offered Rate (LIBOR) [Member] | Floor [Member]
Debt instrument, basis spread on variable rate	1.00%
London Interbank Offered Rate (LIBOR) [Member] | Applicable Margin [Member]
Debt instrument, basis spread on variable rate	4.25%
OBS ABL Facility [Member] | Base Rate [Member] | Applicable Margin [Member]
Debt instrument, basis spread on variable rate	1.25%
OBS ABL Facility [Member] | Base Rate [Member] | Maximum [Member] | Applicable Margin [Member]
Debt instrument, basis spread on variable rate	1.75%
OBS ABL Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Applicable Margin [Member]
Debt instrument, basis spread on variable rate	2.25%
OBS ABL Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Applicable Margin [Member]
Debt instrument, basis spread on variable rate	2.75%