Commitments and Contingencies Activity in Recorded Environmental Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of period	$ 9,235
Expenditures	(1,538)
Accretion of discount	239
Revisions of estimates	10
Foreign currency translation adjustments	(1,737)
Balance at end of period	9,235	$ 37,764
Less amounts reported in Accrued expenses		5,645
Amounts reported in Other noncurrent liabilities		$ 32,119
Rockwood Holdings, Inc.
Accrual for Environmental Loss Contingencies [Roll Forward]
Acquisition of Rockwood	$ 31,555