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Shareholders' equity - Outstanding (Detail) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 EquityInstruments $ / shares shares | Dec. 31, 2016 EquityInstruments shares | Dec. 31, 2015 EquityInstruments
Stock-based payments |  |  |
Common share outstanding | 185,930,331 | 178,482,139 |
Stock options | EquityInstruments | 955,603 | 1,304,328 | 1,592,480
Restricted Share Units | EquityInstruments | 119,796 | 138,614 |
Warrants |  | 6,510,280 |
Special Warrant |  | 2,000,000 |
Total | 187,005,730 | 188,435,361 |
Taseko Mines Limited |  |  |
Stock-based payments |  |  |
The number of warrants granted | 1 |  |
Number of common share exchanged for each purchase share warrant | 2,000,000 |  |
Common share price per share for each purchase share warrant. | $ / shares | $ 75.00 |  |

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