UNITHOLDERS' EQUITY AND PARTNERSHIP DISTRIBUTIONS (Details) - USD ($)	1 Months Ended	3 Months Ended
	Jan. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019
Common units
Units issued (in units)				34,378,849	23,518,652
Units outstanding (in units)	23,518,652	34,378,849		34,378,849	23,518,652
Repayment of debt		$ 70,000,000
Capital rollforward
Unitholders' capital, beginning balance (in units)	23,518,652	23,518,652
Unitholders' capital, ending balance (in units)		34,378,849
Cash distributions declared and paid (in dollars per unit)		$ 0.17	$ 0.37
Common Units
Common units
Units issued (in units)				34,378,849
Units outstanding (in units)	23,518,652	34,378,849		34,378,849	23,518,652
Capital rollforward
Unitholders' capital, beginning balance (in units)	23,518,652	23,518,652
Common units issued for equity offering (in units)		5,000,000
Conversion of Class B Units (in units)		4,913,559
Common units issued under the LTIP (in units)		946,638
Unitholders' capital, ending balance (in units)		34,378,849
Class B
Common units
Units outstanding (in units)	25,557,606	20,644,047		20,644,047	25,557,606
Capital rollforward
Unitholders' capital, beginning balance (in units)	25,557,606	25,557,606
Conversion of Class B Units (in units)		(4,913,559)
Unitholders' capital, ending balance (in units)		20,644,047
Cash distributions (as a percent)		2.00%
Class B Common Units
Capital rollforward
Additional consideration paid per unit (in dollars per unit)		$ 0.05
Public Offering
Common units
Units issued (in units)	5,000,000
Proceeds from equity offering	$ 73,600,000
Repayment of debt	$ 70,000,000
Underwriters option to purchase additional units
Common units
Units issued (in units)	750,000