Segment Information Summarized Financial Information by Reportable Segments (Footnote) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Jan. 12, 2015
Segment Reporting Information [Line Items]
Utilization of inventory markup	[1]	$ 154	$ 48,186
Rockwood Holdings, Inc.
Segment Reporting Information [Line Items]
Inventory markup				$ 103,000
Utilization of inventory markup			48,200
Rockwood Holdings, Inc. | Cost of Sales
Segment Reporting Information [Line Items]
Utilization of inventory markup		$ 200	40,300
Rockwood Holdings, Inc. | Equity in Net Income of Unconsolidated Investments
Segment Reporting Information [Line Items]
Utilization of inventory markup			$ 7,900

[1] In connection with the acquisition of Rockwood, the Company valued Rockwood’s existing inventory at fair value as of the Acquisition Closing Date, which resulted in a markup of the underlying net book value of the inventory totaling approximately $103 million. The inventory markup was expensed over the estimated remaining selling period. For the three-month period ended March 31, 2016, $0.2 million was included in Cost of goods sold related to the utilization of the inventory markup as a result of a measurement-period adjustment. For the three-month period ended March 31, 2015, $40.3 million was included in Cost of goods sold, and Equity in net income of unconsolidated investments was reduced by $7.9 million, respectively, related to the utilization of the inventory markup.