SEGMENT INFORMATION - Total Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Assets	$ 1,323,120	$ 1,218,190
Operating segment | Water Services
Segment Reporting Information [Line Items]
Assets	535,848	629,815
Operating segment | Water Infrastructure
Segment Reporting Information [Line Items]
Assets	582,695	364,587
Operating segment | Chemical Technologies
Segment Reporting Information [Line Items]
Assets	143,917	152,437
Corporate
Segment Reporting Information [Line Items]
Assets	$ 60,660	$ 71,351