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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]  
Activity in Recorded Environmental Liabilities Activity
We had the following activity in our recorded environmental liabilities for the years ended December 31, 2015, 2014 and 2013 (in thousands):
 
Year Ended December 31,
 
2015
 
2014
 
2013
Balance, beginning of year
$
9,235

 
$
16,599

 
$
20,322

Expenditures
(4,178
)
 
(4,548
)
 
(3,013
)
Acquisition of Rockwood
38,666

 
—

 
—

Divestitures
(1,826
)
 
(1,954
)
 
—

Accretion of discount
984

 
—

 
—

Revisions of estimates
150

 
34

 
(902
)
Reclass to liabilities held for sale
(5,253
)
 
—

 
—

Foreign currency translation
(2,480
)
 
(896
)
 
192

Balance, end of year
35,298

 
9,235

 
16,599

Less amounts reported in Accrued expenses
1,493

 
4,394

 
7,386

Amounts reported in Other noncurrent liabilities
$
33,805

 
$
4,841

 
$
9,213
Schedule of Change in Asset Retirement Obligation
The following is a reconciliation of our beginning and ending asset retirement obligation balances for 2015 and 2014 (in thousands):
 
Year Ended December 31,
 
2015
 
2014
Balance, beginning of year
$
15,085

 
$
16,930

Acquisition of Rockwood
17,265

 
—

Liabilities incurred
3,636

 
—

Accretion of discount
1,289

 
323

Liabilities settled
—

 
(333
)
Divestitures
—

 
(1,816
)
Foreign currency translation adjustments
(45
)
 
(19
)
Balance, end of year
$
37,230

 
$
15,085
Future Non-Cancelable Minimum Lease Payments for Next Five Years and Thereafter
The following schedule details the future non-cancelable minimum lease payments for the next five years and thereafter (in thousands):
 
Operating Leases
 
Capital Leases
2016
$
14,643

 
$
3,163

2017
$
10,664

 
$
3,178

2018
$
9,217

 
$
3,193

2019
$
7,436

 
$
10,201

2020
$
6,665

 
$
—

Thereafter
$
21,124

 
$
—

 
 
 
19,735

Less: amount representing interest
 
 
2,928

Present value of net minimum obligations
 
 
$
16,807
Letters of Credit and Guarantee Agreements
The following table summarizes our letters of credit and guarantee agreements (in thousands):
 
2016
 
2017
 
2018
 
2019
 
2020
 
Thereafter
Letters of credit and other guarantees
$
24,789

 
$
11,248

 
$
3,190

 
$
14

 
$
210

 
$
24,356