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Mine restoration provisions (Tables)
 12 Months Ended
Dec. 31, 2019
Disclosure Of Provisions [Abstract]  
Disclosure of other provisions
The following table shows the movement in the provision for mine restoration provisions:
 
 
2019

 
2018

 
 
$

 
$

 
 
 
 
 
Balance, beginning of year
 
117,221

 
98,446

Reclamation spending at continuing operations
 
(124
)
 
(374
)
Reclamation spending at discontinued operations
 
(1,016
)
 
(666
)
Accretion expense
 
2,459

 
2,641

Change in obligation
 
9,790

 
17,174

Obligations sold with Nicaraguan Group (Note 6)
 
(52,911
)
 
—

Balance, end of year
 
75,419

 
117,221

Less: current portion
 
—

 
(3,170
)
 
 
75,419

 
114,051