SEGMENT INFORMATION - Total Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
SEGMENT INFORMATION
Assets	$ 1,346,647	$ 1,218,190
Operating segment | Water Services
SEGMENT INFORMATION
Assets	544,480	629,815
Operating segment | Water Infrastructure
SEGMENT INFORMATION
Assets	614,992	364,587
Operating segment | Chemical Technologies
SEGMENT INFORMATION
Assets	131,931	152,437
Corporate
SEGMENT INFORMATION
Assets	$ 55,244	$ 71,351