Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Activity in Recorded Environmental Liabilities

We had the following activity in our recorded environmental liabilities for the three months endedMarch 31, 2015, as follows (in thousands):

Beginning balance at December 31, 2014	$	9,235
Expenditures	(975		)
Acquisition of Rockwood	31,391
Accretion of discount	111
Revisions of estimates	8
Foreign currency translation	(2,426		)
Ending balance at March 31, 2015	37,344
Less amounts reported in Accrued expenses	5,009
Amounts reported in Other noncurrent liabilities	$	32,335

Schedule of Change in Asset Retirement Obligation

The following is a summary of the activity in our asset retirement obligations for the three months endedMarch 31, 2015 (in thousands):

Beginning Balance at December 31, 2014	$	15,085
Acquisition of Rockwood	17,362
Accretion of discount	230
Revisions of estimates	52
Foreign currency translation	(49		)
Ending balance at March 31, 2015	$	32,680