GOODWILL AND OTHER INTANGIBLE ASSETS (Goodwill) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Goodwill
Goodwill, beginning balance	$ 199,609
Acquisitions	34,000
Foreign currency translation	3,400
Goodwill, ending balance	236,981
Water Systems
Goodwill
Goodwill, beginning balance	136,300
Acquisitions	0
Foreign currency translation	3,100
Goodwill, ending balance	139,400
Fueling Systems
Goodwill
Goodwill, beginning balance	63,300
Acquisitions	0
Foreign currency translation	300
Goodwill, ending balance	63,600
Distribution
Goodwill
Goodwill, beginning balance	0
Acquisitions	34,000
Foreign currency translation	0
Goodwill, ending balance	$ 34,000