Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments And Contingencies Disclosure [Line Items]
Acquisitions (divestitures)	$ (1,826)	$ (1,954)	$ 0
Environmental remediation liabilities - discounted	24,500
Environmental remediation liabilities - undiscounted	64,500
Potential revision on future environmental remediation costs before tax	18,000
Rental expense	45,000	31,900	30,700
Antioxidant, Ibuprofen and Propofol Assets
Commitments And Contingencies Disclosure [Line Items]
Rental expense		1,300	1,600
Rockwood Holdings, Inc.
Commitments And Contingencies Disclosure [Line Items]
Acquisitions (divestitures)	$ 38,666	$ 0	$ 0
Maximum
Commitments And Contingencies Disclosure [Line Items]
Accrual for environmental loss contingencies - discount rate	4.30%
Minimum
Commitments And Contingencies Disclosure [Line Items]
Accrual for environmental loss contingencies - discount rate	2.80%