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DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Oct. 16, 2019
Line of Credit Facility [Line Items]
Unamortized debt issuance costs	$ (2,237)	$ (2,458)
Unamortized discount costs	(6,694)	(7,268)
Total long-term debt	630,507	586,774
5.375 % Senior Notes due 2027
Line of Credit Facility [Line Items]
Long term debt gross	485,938	500,000
5.375 % Senior Notes due 2027 \| Senior Notes
Line of Credit Facility [Line Items]
Long term debt gross	485,900
Debt instrument, interest rate, stated percentage			5.375%
Revolving credit facility
Line of Credit Facility [Line Items]
Long term debt gross	$ 153,500	$ 96,500