EARNINGS PER UNIT (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net (loss) income attributable to the period	$ (142,169)	$ 33,779
Less: net income allocated to participating securities(1)	(20)	(42)
Net (loss) income attributable to common unitholders	$ (142,189)	$ 33,737
Basic weighted average common units outstanding (in shares)	67,822,000	55,448,000
Effect of dilutive securities:
Effect of dilutive securities: Potential common units issuable (in shares)	1,000	27,000
Diluted weighted average common units outstanding (in shares)	67,823,000	55,475,000
Net income per common unit, basic (in USD per share)	$ (2.10)	$ 0.61
Net income per common unit, diluted (in USD per share)	$ (2.10)	$ 0.61
Anti-dilutive for potentially dilute basic earnings per common unit (in shares)	18,169	0