DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Unamortized debt issuance costs	$ (2,380)	$ (2,458)
Unamortized discount costs	(7,080)	(7,268)
Total long-term debt	664,040	586,774
5.375 % Senior Notes due 2027
Line of Credit Facility [Line Items]
Long term debt gross	500,000	500,000
Revolving credit facility
Line of Credit Facility [Line Items]
Long term debt gross	$ 173,500	$ 96,500