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DEBT (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Feb. 16, 2017
Current and long-term debt
Long-term debt, current	$ 105,000
Long-term debt, non-current	613,493	$ 613,105
Debt	718,493	613,105
Unamortized debt issuance costs	10,700	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	$ 613,493	$ 613,105
Interest rate (as a percent)	6.75%	6.75%	6.75%
Unamortized discount	$ 7,000	$ 7,200
Unamortized premium related to debt issued	5,200	5,400
Additional 2025 Notes
Current and long-term debt
Unamortized debt issuance costs	9,700	$ 10,100
Unamortized premium related to debt issued	5,200
Senior revolving credit facility
Current and long-term debt
Long-term debt, current	$ 105,000

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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