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Goodwill And Intangible Assets (Schedule Of Goodwill) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
CAG [Member]
Dec. 31, 2012
CAG [Member]
Dec. 31, 2011
CAG [Member]
Dec. 31, 2013
Water Segment [Member]
Dec. 31, 2012
Water Segment [Member]
Dec. 31, 2011
Water Segment [Member]
Dec. 31, 2013
LPD [Member]
Dec. 31, 2012
LPD [Member]
Dec. 31, 2011
LPD [Member]
Dec. 31, 2013
Other Segment [Member]
Dec. 31, 2012
Other Segment [Member]
Dec. 31, 2011
Other Segment [Member]
Dec. 31, 2010
Other Segment [Member]
Segments Of Goodwill [Line Items]                                
Beginning balance $ 174,994 $ 172,610 $ 149,112 $ 143,155 $ 141,677 $ 118,131 $ 14,179 $ 13,576 $ 13,648 $ 11,129 $ 10,826 $ 10,802 $ 6,531 $ 6,531 $ 6,531 $ 6,531
Business Combinations 6,741   24,689 250   24,689       6,491            
Impact of Changes in Foreign Currency Exchange Rates (1,214) 2,384 (1,191) (1,997) 1,478 (1,143) 336 603 (72) 447 303 24        
Ending balance $ 180,521 $ 174,994 $ 172,610 $ 141,408 $ 143,155 $ 141,677 $ 14,515 $ 14,179 $ 13,576 $ 18,067 $ 11,129 $ 10,826 $ 6,531 $ 6,531 $ 6,531 $ 6,531