GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS (Goodwill) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Goodwill
Goodwill, beginning balance	$ 248,748
Acquisitions	1,700
Foreign currency translation	(200)
Goodwill, ending balance	250,168
Water Systems
Goodwill
Goodwill, beginning balance	145,500
Acquisitions	0
Foreign currency translation	(300)
Goodwill, ending balance	145,200
Fueling Systems
Goodwill
Goodwill, beginning balance	67,500
Acquisitions	0
Foreign currency translation	100
Goodwill, ending balance	67,600
Distribution
Goodwill
Goodwill, beginning balance	35,700
Acquisitions	1,700
Foreign currency translation	0
Goodwill, ending balance	$ 37,400