Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Activity in Recorded Environmental Liabilities

We had the following activity in our recorded environmental liabilities for the six months endedJune 30, 2015, as follows (in thousands):

Beginning balance at December 31, 2014	$	9,235
Expenditures	(1,538		)
Acquisition of Rockwood	31,555
Accretion of discount	239
Revisions of estimates	10
Foreign currency translation adjustments	(1,737		)
Ending balance at June 30, 2015	37,764
Less amounts reported in Accrued expenses	5,645
Amounts reported in Other noncurrent liabilities	$	32,119

Schedule of Change in Asset Retirement Obligation

The following is a summary of the activity in our asset retirement obligations for the six months endedJune 30, 2015 (in thousands):

Beginning balance at December 31, 2014	$	15,085
Acquisition of Rockwood	17,265
Liabilities incurred	1,025
Accretion of discount	600
Foreign currency translation adjustments	(47		)
Ending balance at June 30, 2015	$	33,928