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Divestitures Divestitures - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Feb. 01, 2016
Jan. 04, 2016
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Jun. 17, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Cash proceeds from divestitures, net         $ 310,599 $ 6,133  
Gain (loss) on sales of businesses, net     $ 0 $ 0 122,298 $ 0  
Chemetall Surface Treatment              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Cash consideration             $ 3,200,000
Metal Sulfides Business              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Cash proceeds from divestitures, net   $ 137,000          
Gain (loss) on sales of businesses, net         11,500    
Mineral Flame Retardants and Specialty Chemicals Businesses              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Cash proceeds from divestitures, net $ 187,000            
Gain (loss) on sales of businesses, net         112,300    
Magnifin Magnesiaprodukte GmbH & Co. KG              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Ownership Percentage 50.00%            
Corporate | Wafer Reclaim              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Gain (loss) on sales of businesses, net         (1,500)    
United States | Chemetall Surface Treatment              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Discrete non-cash (charge) benefit         (381,500)    
Foreign | Chemetall Surface Treatment              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Discrete non-cash (charge) benefit     $ 5,400   (29,800)    
Deferred tax liability              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Discrete non-cash (charge) benefit         $ (411,300)