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Segment and Geographic Area Information Summarized Financial Information by Reportable Segments (Footnote) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Segment Reporting Information [Line Items]      
Restructuring and other $ 19,597 $ 5,877 $ 3,838
Multiemployer Plan, Employer Contribution, Cost 1,500 1,400 1,500
Gain on sale of property 0 (14,411) 0
Loss on early extinguishment of debt 0 4,829 0
Asset retirement obligation charges   3,600  
Non-operating pension and OPEB items $ 40,668 26,970 5,285
Charitable contribution     15,000
Jordan Bromine Company Limited      
Segment Reporting Information [Line Items]      
Ownership percentage 50.00%    
Cost of goods sold      
Segment Reporting Information [Line Items]      
Restructuring and other $ 700   100
Expense Relating to a Legal Matter 1,300    
Non-routine Chilean labor costs   700 8,800
Write-off of fixed assets     4,900
Selling, general and administrative expenses      
Segment Reporting Information [Line Items]      
Restructuring and other 19,200 5,900 3,700
Accrual for Environmental Loss Contingencies, Revision in Estimates 3,800    
Revision of tax indemnification expense   800  
Gain on sale of property   (3,300)  
Write-off of uncollectable accounts receivable   900  
Settlement of terminated agreements   1,000  
Charitable contribution     1,200
Gain related to a refund form Chilean authorities     1,500
Other expenses, net      
Segment Reporting Information [Line Items]      
Gain (Loss) on Disposition of Other Assets 3,600    
Settlement of a legal claim 2,500    
Revision of tax indemnification expense 9,600 9,800 19,700
Non-routine Chilean labor costs   1,200  
Gain on sale of property   (11,100)  
Unrecoverable vendor costs   3,100  
Asset retirement obligation charges   3,600  
Revision of previously recorded expenses of a disposed business     5,500
Reversal of a liability from previous business     1,500
Other expenses, net | Jordan Bromine Company Limited      
Segment Reporting Information [Line Items]      
Non-operating pension and OPEB items   1,200  
Noncontrolling Interests      
Segment Reporting Information [Line Items]      
Restructuring and other 300    
Financial Improvement Plan | Selling, general and administrative expenses      
Segment Reporting Information [Line Items]      
Multiemployer Plan, Employer Contribution, Cost $ 3,100 $ 1,800 $ 2,300
Windfield Holdings      
Segment Reporting Information [Line Items]      
Ownership percentage 49.00% 49.00% 49.00%
Saudi Organometallic Chemicals Company LLC [Domain] | Other expenses, net      
Segment Reporting Information [Line Items]      
Gain on Sale of Investments $ 7,200