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MARKETABLE SECURITIES | 12 Months Ended
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Dec. 31, 2018
Disclosure Of Detailed Information About Marketable Securities [Abstract] |
MARKETABLE SECURITIES | MARKETABLE SECURITIES
| December 31, 2018 |  | December 31, 2017 |
| $ |  | $ |
Balance, beginning of year | 114,001 |  | 148,944 |
Additions | 22,674 |  | 5,295 |
Disposals | (63,445 | ) | (72,132 | )
Fair value adjustments | (43,688 | ) | 31,894 |
Balance, end of year | 29,542 |  | 114,001 |
During 2018, we purchased 8.2 million common shares of SilverCrest Metals Inc. ("SilverCrest") for total consideration of $23.1 million and sold our remaining position of 9.0 million common shares of Pretium Resources Inc. ("Pretium") for pre-tax cash proceeds of approximately $63.4 million. The fair value adjustments in 2018 related primarily to the Pretium shares. On acquisition of the SilverCrest shares, we recognized an expense of $2.8 million related to the premium paid for the shares over the prevailing market price. Due to the subsequent increase in the SilverCrest share price, we recognized a gain of $4.3 million in Other Comprehensive Income at December 31, 2018. The SilverCrest common shares are subject to a hold period of four months from their December 7, 2018 acquisition date.

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