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ASSET RETIREMENT OBLIGATIONS (Tables)
9 Months Ended
Sep. 30, 2019
ASSET RETIREMENT OBLIGATIONS  
Schedule of reconciliation of asset retirement obligations

    

September 30, 2019

    

December 31, 2018

Asset retirement obligation liability, beginning balance

$

29,402

$

24,722

Settlements

 

(324)

 

(392)

Accretion of liability

 

1,295

 

1,205

Adjustment reflecting updated estimates

 

(1,053)

 

5,024

Foreign exchange revaluation

434

(1,157)

Asset retirement obligation liability, ending balance

$

29,754

$

29,402

Current portion

(1,435)

(734)

Long-term portion

$

28,319

$

28,668