Goodwill And Intangible Assets, Net (Schedule Of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segments Of Goodwill [Line Items]
Beginning balance	$ 184,450	$ 180,521	$ 174,994
Business Combinations	5,047	13,077	6,741
Impact of Changes in Foreign Currency Exchange Rates	(10,563)	(9,148)	(1,214)
Ending balance	178,934	184,450	180,521
CAG [Member]
Segments Of Goodwill [Line Items]
Beginning balance	148,151	141,408	143,155
Business Combinations	5,047	13,077	250
Impact of Changes in Foreign Currency Exchange Rates	(8,007)	(6,334)	(1,997)
Ending balance	145,191	148,151	141,408
Water Segment [Member]
Segments Of Goodwill [Line Items]
Beginning balance	13,689	14,515	14,179
Impact of Changes in Foreign Currency Exchange Rates	(651)	(826)	336
Ending balance	13,038	13,689	14,515
LPD [Member]
Segments Of Goodwill [Line Items]
Beginning balance	16,079	18,067	11,129
Business Combinations			6,491
Impact of Changes in Foreign Currency Exchange Rates	(1,905)	(1,988)	447
Ending balance	14,174	16,079	18,067
Other Segment [Member]
Segments Of Goodwill [Line Items]
Beginning balance	6,531	6,531	6,531
Ending balance	$ 6,531	$ 6,531	$ 6,531