COMMON UNIT-BASED COMPENSATION PLANS - SERP and Directors (Details) - SERP and Deferred Compensation Plans - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Number of units
Balance at the beginning of the period (in units)	811,946
Granted (in units)	27,879
Balance at the end of the period (in units)	839,825
Weighted average grant date fair value per unit
Balance at the beginning of the period (in dollars per unit)	$ 20.44
Granted (in dollars per unit)	19.90
Balance at the end of the period (in dollars per unit)	$ 20.42
Intrinsic value (in dollars)
Intrinsic value of outstanding grants (in dollars)	$ 16,838		$ 17,197
Other information
Unit-based compensation expense	700	$ 600
Total unit-based obligation recorded	$ 17,100