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Asset Retirement Obligations (Tables)
 3 Months Ended
Mar. 31, 2016
Asset Retirement and Reclamation Liabilities  
Summary of activity in the Velardena Properties ARO

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

 

 

March 31,

 

 

    

2016

    

2015

 

 

 

(in thousands)

 

Beginning balance

 

$
2,480

 

$
2,582

 

 

 

 

 

 

 

 

 

Changes in estimates, and other

 

 
(293)

 

 
(300)

 

Accretion expense

 

 
50

 

 
52

 

Ending balance

 

$
2,237

 

$
2,334