SEGMENT REPORTING - Financial Information of Company's Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information, Profit (Loss) [Abstract]
Total Sales	$ 412,635	$ 424,267
Total Segments Operating Income	52,552	60,524
Service Centers
Segment Reporting Information, Profit (Loss) [Abstract]
Total Sales	288,435	305,813
Total Segments Operating Income	40,320	45,820
Innovative Pumping Solutions
Segment Reporting Information, Profit (Loss) [Abstract]
Total Sales	62,216	51,411
Total Segments Operating Income	6,970	9,190
Supply Chain Services
Segment Reporting Information, Profit (Loss) [Abstract]
Total Sales	61,984	67,043
Total Segments Operating Income	$ 5,262	$ 5,514