Goodwill and Other Intangibles Changes in Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 243,262
Foreign currency translation adjustments	(118,916)
Balance at end of period	2,811,086
Rockwood Holdings, Inc.
Goodwill [Roll Forward]
Acquisition of goodwill	2,677,465
Other significant projects
Goodwill [Roll Forward]
Acquisition of goodwill	$ 9,275