Commitments and Contingencies - Additional Information (Details) - Jun. 30, 2015 - USD ($) $ in Thousands	Total
Loss Contingencies [Line Items]
Environmental remediation liabilities - discounted	$ 21,800
Environmental remediation liabilities - undiscounted	35,100
Potential revision on future environmental remediation costs before tax	$ 22,000
Minimum
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies, Discount Rate	2.80%
Maximum
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies, Discount Rate	4.30%
Rockwood Holdings, Inc.
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies from Rockwood Acquisition	$ 31,555