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Acquisitions (Narrative) (Details) - USD ($)
$ in Thousands
1 Months Ended 9 Months Ended
Feb. 05, 2016
Dec. 31, 2016
Dec. 31, 2016
Mar. 31, 2016
Business Acquisition [Line Items]        
Goodwill   $ 345,485 $ 345,485 $ 360,191
DenTek Oral Care, Inc.        
Business Acquisition [Line Items]        
Purchase price $ 226,900      
Non-amortizable intangible assets 179,800      
Amortizable intangible assets $ 26,900      
Purchased amortizable intangible assets, weighted average useful life 18 years 6 months      
Purchased amortizable intangible assets, weighted average remaining period     17 years 8 months  
Reduction to Goodwill   $ 2,800    
Goodwill $ 73,737