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MARKETABLE SECURITIES
 12 Months Ended
Dec. 31, 2020
Disclosure Of Detailed Information About Marketable Securities [Abstract]  
MARKETABLE SECURITIES MARKETABLE SECURITIES
  December 31, 2020 December 31, 2019
Balance, beginning of year $ 66,453  $ 29,542 
Additions 35,132  6,112 
Disposals (97,098) (3,534)
Fair value adjustments 22,261  34,333 
Balance, end of year $ 26,748  $ 66,453 

Purchases and sales of marketable securities are accounted for as of the trade date.

During the year ended December 31 2020, the Company sold 100% of its equity position in SilverCrest Metals Inc. and other securities for gross proceeds of $97.1 million, being the fair value of the investments at the dates of disposals. On disposal, the cumulative gain recognized in AOCI was $38.0 million (pre-tax).