Goodwill And Intangible Assets, Net (Schedule Of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segments Of Goodwill [Line Items]
Beginning balance	$ 178,228	$ 178,934	$ 184,450
Business Combinations	13,541	1,720	5,047
Impact of Changes in Foreign Currency Exchange Rates	8,104	(2,426)	(10,563)
Ending balance	199,873	178,228	178,934
CAG [Member]
Segments Of Goodwill [Line Items]
Beginning balance	146,194	145,191	148,151
Business Combinations	13,541	1,720	5,047
Impact of Changes in Foreign Currency Exchange Rates	6,501	(717)	(8,007)
Ending balance	166,236	146,194	145,191
Water [Member]
Segments Of Goodwill [Line Items]
Beginning balance	10,890	13,038	13,689
Impact of Changes in Foreign Currency Exchange Rates	1,061	(2,148)	(651)
Ending balance	11,951	10,890	13,038
LPD [Member]
Segments Of Goodwill [Line Items]
Beginning balance	14,613	14,174	16,079
Impact of Changes in Foreign Currency Exchange Rates	542	439	(1,905)
Ending balance	15,155	14,613	14,174
Other [Member]
Segments Of Goodwill [Line Items]
Beginning balance	6,531	6,531	6,531
Ending balance	$ 6,531	$ 6,531	$ 6,531