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Acquisition and Divestiture (Divestiture Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jan. 30, 2015
Mar. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Pre-tax gain on sale     $ 18,647 $ 0 $ 0
Vital Fluids          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Business sold cash received $ 30,100        
Pre-tax gain on sale   $ 18,600      
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Vital Fluids          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Business sold cash received $ 30,100        
Gain on disposal of business   11,800      
Life Sciences Vital Fluids | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Gain on disposal of business   $ 11,800