CASH DISTRIBUTIONS - General Partner Distribution Incentives (Details)	12 Months Ended
	Dec. 31, 2020 $ / shares
Minimum Quarterly Distribution
Partners' Equity
Total Quarterly Distribution Per Unit Target Amount (in dollars per unit)	$ 0.45
Thereafter
Partners' Equity
Total Quarterly Distribution Per Unit Target Amount (in dollars per unit)	0.88
Minimum | First Target Distribution
Partners' Equity
Total Quarterly Distribution Per Unit Target Amount (in dollars per unit)	0.45
Minimum | Second Target Distribution
Partners' Equity
Total Quarterly Distribution Per Unit Target Amount (in dollars per unit)	0.81
Maximum | First Target Distribution
Partners' Equity
Total Quarterly Distribution Per Unit Target Amount (in dollars per unit)	0.81
Maximum | Second Target Distribution
Partners' Equity
Total Quarterly Distribution Per Unit Target Amount (in dollars per unit)	$ 0.88
Limited Partners | Common units | Minimum Quarterly Distribution
Partners' Equity
Marginal Percentage Interest in Distribution, Common Unitholders (as a percent)	98.00%
Limited Partners | Common units | First Target Distribution
Partners' Equity
Marginal Percentage Interest in Distribution, Common Unitholders (as a percent)	98.00%
Limited Partners | Common units | Second Target Distribution
Partners' Equity
Marginal Percentage Interest in Distribution, Common Unitholders (as a percent)	85.00%
Limited Partners | Common units | Thereafter
Partners' Equity
Marginal Percentage Interest in Distribution, Common Unitholders (as a percent)	75.00%
General Partner | Minimum Quarterly Distribution
Partners' Equity
Marginal Percentage Interest in Distribution, General Partner (includes IDRs)	2.00%
General Partner | First Target Distribution
Partners' Equity
Marginal Percentage Interest in Distribution, General Partner (includes IDRs)	2.00%
General Partner | Second Target Distribution
Partners' Equity
Marginal Percentage Interest in Distribution, General Partner (includes IDRs)	15.00%
General Partner | Thereafter
Partners' Equity
Marginal Percentage Interest in Distribution, General Partner (includes IDRs)	25.00%