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DEBT (Details) - USD ($) $ in Thousands	Aug. 07, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Feb. 16, 2017
Current and long-term debt
Long-term debt, current		$ 801,887
Long-term debt, non-current				$ 613,105
Debt		801,887		613,105
Unamortized debt issuance costs		10,100		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, current		$ 613,887
Long-term debt, non-current				$ 613,105
Interest rate (as a percent)	6.75%	6.75%	6.75%	6.75%	6.75%
Unamortized debt issuance costs		$ 9,400		$ 10,100
Unamortized discount		6,700		7,200
Additional 2025 Notes
Current and long-term debt
Unamortized premium related to debt issued		5,000		$ 5,400
Senior revolving credit facility
Current and long-term debt
Long-term debt, current		$ 188,000
Interest added to applicable itnerest 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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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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