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Commitments and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]  
Activity in Recorded Environmental Liabilities
We had the following activity in our recorded environmental liabilities for the nine months ended September 30, 2018, as follows (in thousands):
Beginning balance at December 31, 2017
$
39,808

Expenditures
(3,564
)
Accretion of discount
669

Additions and changes in estimates
16,236

Foreign currency translation adjustments
(346
)
Ending balance at September 30, 2018
52,803

Less amounts reported in Accrued expenses
5,012

Amounts reported in Other noncurrent liabilities
$
47,791