Goodwill and Other Intangibles - Changes in Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 1,665,520
Reclass to assets held for sale	(6,586)
Foreign currency translation adjustments and other	(29,765)
Balance at end of period	1,629,169
Reportable Segments | Lithium
Goodwill [Roll Forward]
Balance at beginning of period	1,441,781
Reclass to assets held for sale	0
Foreign currency translation adjustments and other	(23,110)
Balance at end of period	1,418,671
Reportable Segments | Bromine Specialties
Goodwill [Roll Forward]
Balance at beginning of period	20,319
Reclass to assets held for sale	0
Foreign currency translation adjustments and other	0
Balance at end of period	20,319
Reportable Segments | Catalysts
Goodwill [Roll Forward]
Balance at beginning of period	196,834
Reclass to assets held for sale	0
Foreign currency translation adjustments and other	(6,655)
Balance at end of period	190,179
Reportable Segments | All Other
Goodwill [Roll Forward]
Balance at beginning of period	6,586
Reclass to assets held for sale	(6,586)
Foreign currency translation adjustments and other	0
Balance at end of period	$ 0