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Provisions
 12 Months Ended
Dec. 31, 2019
Disclosure of other provisions [abstract]  
Provisions [Text Block]

19. Provisions

    Decommis-sioning, restoration and similar liabilities     Deferred share units (note 24a)     Restricted share units1 (note 24a)     Other     Total  
Balance, January 1, 2019 $ 202,024   $ 4,288   $ 12,201   $ 411   $ 218,924  
Net additional provisions made   68,881     1,479     2,885     2,882     76,127  
Amounts used   (4,136 )   (1,668 )   (9,380 )   (341 )   (15,525 )
Unwinding of discount (note 6g)   4,392     -     -     -     4,392  
Effect of change in discount rate   23,635     -     -     -     23,635  
Effect of foreign exchange   7,320     99     225     4     7,648  
Effect of change in share price   -     (322 )   (454 )   -     (776 )
Balance, December 31, 2019 $ 302,116   $ 3,876   $ 5,477   $ 2,956   $ 314,425  

1 Certain amounts relating to the Arizona segment are capitalized.

Provisions are reflected in the consolidated balance sheets as follows:

December 31, 2019   Decommis-sioning, restoration and similar liabilities     Deferred share units (note 24a)     Restricted share units1 (note 24a)     Other     Total  
Current (note 14) $ 23,621   $ 3,876   $ 4,468   $ 1,610   $ 33,575  
Non-current   278,495     -     1,009     1,346     280,850  
  $ 302,116   $ 3,876   $ 5,477   $ 2,956   $ 314,425  
 
    Decommis-sioning, restoration and similar liabilities     Deferred share units (note 24a)     Restricted share units1 (note 24a)     Other     Total  
Balance, January 1, 2018 $ 200,041   $ 6,623   $ 19,409   $ 1,435   $ 227,508  
Net additional provisions made   9,031     973     7,493     -     17,497  
Amounts used   (188 )   -     (6,435 )   (770 )   (7,393 )
Unwinding of discount (note 6g)   4,684     -     -     -     4,684  
Effect of change in discount rate   (462 )   -     -     -     (462 )
Effect of foreign exchange   (11,082 )   (458 )   (973 )   (74 )   (12,587 )
Effect of change in share price   -     (2,850 )   (7,293 )   (180 )   (10,323 )
Balance, December 31, 2018 $ 202,024   $ 4,288   $ 12,201   $ 411   $ 218,924  

1 Certain amounts relating to the Arizona segment are capitalized.

December 31, 2018   Decommis-sioning, restoration and similar liabilities     Deferred share units (note 24a)     Restricted share units1 (note 24a)     Other     Total  
Current (note 14) $ 1,234   $ 4,288   $ 8,412   $ 342   $ 14,276  
Non-current   200,790     -     3,789     69     204,648  
  $ 202,024   $ 4,288   $ 12,201   $ 411   $ 218,924  

Decommissioning, restoration and similar liabilities are remeasured at each reporting date to reflect changes in discount rates, which can significantly affect the liabilities.

Decommissioning, restoration and similar liabilities

The Group's decommissioning, restoration and similar liabilities relate to the rehabilitation and closure of currently operating mines and metallurgical plants, development-phase properties and closed properties. The amount of the provision has been recorded based on estimates and assumptions that management believes are reasonable; however, actual decommissioning and restoration costs may differ from expectations.

During 2019, additional provisions were recognized as a result of higher estimates for closure activities of tailings facilities at the Manitoba operations to ensure compliance with higher industry-wide standards for tailings management safety and, to a lesser extent, increased mine activity footprints and the resulting higher disturbance at the Constancia operation.

During the year ended December 31, 2018 additional provisions were recognized as a result of increased mine activity footprints and the resulting higher disturbance at the Constancia operation.

The Group's decommissioning and restoration liabilities relate mainly to its Manitoba operations. Management anticipates that the assets in Flin Flon will be placed on care and maintenance once mining activities are completed at 777 mine in order to maintain optionality for restart should a new mine be found in the Flin Flon area. The majority of closure activities will occur once all mining activities in Manitoba are completed, which is currently anticipated in 2028. These provisions also reflect estimated post-closure cash flows that extend to 2100 for ongoing monitoring and water treatment requirements. Management anticipates most decommissioning and restoration activities for the Constancia operation will occur from 2035 to 2070, which include ongoing monitoring and water treatment requirements.

These estimates have been discounted to their present value at rates ranging from 1.59% to 2.39% per annum (2018 - 1.80% to 3.02%), using pre-tax risk-free interest rates that reflect the estimated maturity of each specific liability.