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v3.19.1

Share Capital (Schedule of Stock Options Range for Outstanding and Exercisable Shares) (Details) | Dec. 31, 2018 CAD ($) shares year | Dec. 31, 2018 USD ($) shares year | Dec. 31, 2017 CAD ($) shares | Dec. 31, 2016 CAD ($) shares
--- | --- | --- | --- | ---
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Number of options outstanding (in shares) | shares | 6,655,455 | 6,655,455 | 10,429,345 | 9,511,636
Outstanding weighted average exercise price (CAD per share) | $ 7.38 |  | $ 7.94 | $ 10.87
Weighted average remaining contractual life of options outstanding (years) | year | 2.65 | 2.65 |  |
Number of options exercisable (in shares) | shares | 4,737,738 | 4,737,738 |  |
Exercisable weighted average exercise price (CAD per share)) | $ 7.79 |  |  |
$0.82 - $3.00 |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Number of options outstanding (in shares) | shares | 213,108 | 213,108 |  |
Outstanding weighted average exercise price (CAD per share) | $ 2.67 |  |  |
Weighted average remaining contractual life of options outstanding (years) | year | 0.04 | 0.04 |  |
Number of options exercisable (in shares) | shares | 213,108 | 213,108 |  |
Exercisable weighted average exercise price (CAD per share)) | $ 2.67 |  |  |
$3.01 - $7.00 |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Number of options outstanding (in shares) | shares | 2,668,070 | 2,668,070 |  |
Outstanding weighted average exercise price (CAD per share) | $ 4.97 |  |  |
Weighted average remaining contractual life of options outstanding (years) | year | 4.52 | 4.52 |  |
Number of options exercisable (in shares) | shares | 1,136,011 | 1,136,011 |  |
Exercisable weighted average exercise price (CAD per share)) | $ 4.18 |  |  |
$7.01 - $11.00 |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Number of options outstanding (in shares) | shares | 3,159,640 | 3,159,640 |  |
Outstanding weighted average exercise price (CAD per share) | $ 8.24 |  |  |
Weighted average remaining contractual life of options outstanding (years) | year | 1.66 | 1.66 |  |
Number of options exercisable (in shares) | shares | 2,773,982 | 2,773,982 |  |
Exercisable weighted average exercise price (CAD per share)) | $ 8.05 |  |  |
$11.01 - $15.00 |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Number of options outstanding (in shares) | shares | 249,777 | 249,777 |  |
Outstanding weighted average exercise price (CAD per share) | $ 13.15 |  |  |
Weighted average remaining contractual life of options outstanding (years) | year | 0.67 | 0.67 |  |
Number of options exercisable (in shares) | shares | 249,777 | 249,777 |  |
Exercisable weighted average exercise price (CAD per share)) | $ 13.15 |  |  |
$15.01 - $19.00 |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Number of options outstanding (in shares) | shares | 364,860 | 364,860 |  |
Outstanding weighted average exercise price (CAD per share) | $ 16.42 |  |  |
Weighted average remaining contractual life of options outstanding (years) | year | 0.56 | 0.56 |  |
Number of options exercisable (in shares) | shares | 364,860 | 364,860 |  |
Exercisable weighted average exercise price (CAD per share)) | $ 16.42 |  |  |
Bottom of range [member] | $0.82 - $3.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | $ 0.82 |  |
Bottom of range [member] | $3.01 - $7.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | 3.01 |  |
Bottom of range [member] | $7.01 - $11.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | 7.011 |  |
Bottom of range [member] | $11.01 - $15.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | 11.01 |  |
Bottom of range [member] | $15.01 - $19.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | 15.01 |  |
Bottom of range [member] | $19.01 - $23.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | 19.01 |  |
Top of range [member] | $0.82 - $3.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | 3.00 |  |
Top of range [member] | $3.01 - $7.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | 7.00 |  |
Top of range [member] | $7.01 - $11.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | 11.00 |  |
Top of range [member] | $11.01 - $15.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | 15.00 |  |
Top of range [member] | $15.01 - $19.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | 19.00 |  |
Top of range [member] | $19.01 - $23.00 |  |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |  |
Exercise price of outstanding share options |  | $ 23.00 |  |

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