GOODWILL AND OTHER INTANGIBLE ASSETS (Goodwill) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Goodwill
Goodwill, beginning balance	$ 199,609
Foreign currency translation	800
Goodwill, ending balance	200,407
Water Systems
Goodwill
Goodwill, beginning balance	136,300
Foreign currency translation	700
Goodwill, ending balance	137,000
Fueling Systems
Goodwill
Goodwill, beginning balance	63,300
Foreign currency translation	100
Goodwill, ending balance	$ 63,400