GOODWILL AND OTHER INTANGIBLE ASSETS (Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Goodwill
Goodwill, beginning balance	$ 248,748	$ 236,800
Acquisitions	8,200	16,000
Foreign currency translation	(800)	(4,100)
Goodwill, ending balance	256,059	248,748
Water Systems
Goodwill
Goodwill, beginning balance	145,500	139,300
Acquisitions	6,400	10,100
Foreign currency translation	(900)	(3,900)
Goodwill, ending balance	151,000	145,500
Fueling Systems
Goodwill
Goodwill, beginning balance	67,500	63,600
Acquisitions	0	4,100
Foreign currency translation	100	(200)
Goodwill, ending balance	67,600	67,500
Distribution
Goodwill
Goodwill, beginning balance	35,700	33,900
Acquisitions	1,800	1,800
Foreign currency translation	0	0
Goodwill, ending balance	$ 37,500	$ 35,700