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DEBT (Details) - USD ($) $ in Thousands	Sep. 07, 2017	Sep. 30, 2019	Aug. 02, 2019	Dec. 31, 2018	Feb. 16, 2017
Current and long-term debt
Long-term debt, current		$ 258,234
Long-term debt, non-current				$ 613,105
Debt		258,234		613,105
Unamortized debt issuance costs		$ 0		11,100
8.625% senior secured second lien notes due 2020
Current and long-term debt
Interest rate (as a percent)					8.625%
6.75% senior notes due 2025
Current and long-term debt
Long-term debt, non-current				$ 613,105
Interest rate (as a percent)		6.75%	6.75%	6.75%	6.75%
Unamortized discount				$ 7,200
Additional 2025 Notes
Current and long-term debt
Unamortized debt issuance costs				10,100
Unamortized premium related to debt issued				$ 5,400
DIP Credit Agreement
Current and long-term debt
Long-term debt, current		$ 35,000
Senior revolving credit facility
Current and long-term debt
Long-term debt, current		$ 223,234
Interest added to applicable interest rate in effect (as a percent)	2.00%

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Contractual interest rate for funds borrowed, under the debt agreement.

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