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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2016
Asset Retirement Obligations  
Changes In Asset Retirement Obligation Liability

 

 

 

 

 

 

 

 

 

December 31, 2016

 

December 31, 2015

 

 

(In thousands)

Asset retirement obligation as of the beginning of the period

 

$
54,727

 

$
55,136

Additional obligations

 

 
8,720

 

 
7,660

Accretion expense

 

 
1,803

 

 
2,210

Change in estimates

 

 
(1,638)

 

 
(4,878)

Payments

 

 
(4,351)

 

 
(3,499)

Foreign currency translation adjustments

 

 
(4,354)

 

 
(1,902)

Total asset retirement obligation at the end of the period

 

 
54,907

 

 
54,727

Less: current portion of asset retirement obligation

 

 
9,821

 

 
3,042

Asset retirement obligation, excluding current portion

 

$
45,086

 

$
51,685