COMMON UNIT-BASED COMPENSATION PLANS - SERP and Directors (Details) - SERP and Deferred Compensation Plans - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other information
Unit-based compensation expense	$ 1,400	$ 400	$ 700
Total unit-based obligation recorded	$ 15,100	$ 13,500
Phantom Share Units (PSUs)
Number of units
Balance at the beginning of the period (in units)	668,698	760,630	631,365
Granted (in units)	73,842	46,638	129,265
Issued (in units)		(138,570)
Balance at the end of the period (in units)	742,540	668,698	760,630
Weighted average grant date fair value per unit
Balance at the beginning of the period (in dollars per unit)	$ 20.37	$ 22.04	$ 25.48
Granted (in dollars per unit)	19.44	9.45	5.25
Issued (in dollars per unit)		25.86
Balance at the end of the period (in dollars per unit)	$ 20.28	$ 20.37	$ 22.04
Intrinsic value (in dollars)
Intrinsic value of outstanding grants (in dollars)	$ 15,088	$ 8,452	$ 3,408	$ 6,831
Other information
Purchased for awards (in shares)	102,962