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Goodwill And Intangible Assets, Net (Schedule Of Goodwill) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segments Of Goodwill [Line Items] |  |  |
Beginning balance | $ 178,934 | $ 184,450 | $ 180,521
Business Combinations | 1,720 | 5,047 | 13,077
Impact of Changes in Foreign Currency Exchange Rates | (2,426) | (10,563) | (9,148)
Ending balance | 178,228 | 178,934 | 184,450
CAG [Member] |  |  |
Segments Of Goodwill [Line Items] |  |  |
Beginning balance | 145,191 | 148,151 | 141,408
Business Combinations | 1,720 | 5,047 | 13,077
Impact of Changes in Foreign Currency Exchange Rates | (717) | (8,007) | (6,334)
Ending balance | 146,194 | 145,191 | 148,151
Water Segment [Member] |  |  |
Segments Of Goodwill [Line Items] |  |  |
Beginning balance | 13,038 | 13,689 | 14,515
Impact of Changes in Foreign Currency Exchange Rates | (2,148) | (651) | (826)
Ending balance | 10,890 | 13,038 | 13,689
LPD [Member] |  |  |
Segments Of Goodwill [Line Items] |  |  |
Beginning balance | 14,174 | 16,079 | 18,067
Impact of Changes in Foreign Currency Exchange Rates | 439 | (1,905) | (1,988)
Ending balance | 14,613 | 14,174 | 16,079
Other Segment [Member] |  |  |
Segments Of Goodwill [Line Items] |  |  |
Beginning balance | 6,531 | 6,531 | 6,531
Ending balance | $ 6,531 | $ 6,531 | $ 6,531

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