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Share-Based Compensation And Other Related Information (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Disclosure of number and weighted average exercise prices of share options | The following table summarizes changes in stock options for the years ended December 31:
| Stock Options
| Shares | Weighted Average Exercise Price CAD$
As at December 31, 2018 | 698,387 |  | $ | 15.00 |
Granted | 22,788 |  | $ | 26.54 |
Granted pursuant to the Tahoe Acquisition (Note 8) | 835,874 |  | $ | 48.47 |
Exercised | (244,299) |  | $ | 15.10 |
Expired | (141,604) |  | $ | 58.45 |
Forfeited | (27,798) |  | $ | 34.00 |
As at December 31, 2019 | 1,143,348 |  | $ | 33.84 |
Granted | 7,605 |  | 39.48 |
Exercised | (329,711) |  | $ | 19.23 |
Expired | (482,438) |  | 53.41 |
Forfeited | (21,387) |  | $ | 43.08 |
As at December 31, 2020 | 317,417 |  | $ | 18.78 |
Disclosure of range of exercise prices of outstanding share options | The following table summarizes information about the Company's stock options outstanding at December 31, 2020:
| Options Outstanding | Options Exercisable
Range of Exercise Prices CAD$ | Number Outstanding as at December 31, 2020 | Weighted Average Remaining Contractual Life (months) | Weighted Average Exercise Price CAD$ | Number Outstanding as at December 31, 2020 | Weighted Average Exercise Price CAD$
$9.76 - $23.61 | 269,727 |  | 41.49 |  | $ | 15.75 |  | 269,727 |  | $ | 15.75 |
$23.62 - $35.21 | 22,788 |  | 71.16 |  | $ | 26.54 |  | 11,396 |  | $ | 26.54 |
$35.22 - $46.53 | 22,019 |  | 37.60 |  | $ | 41.68 |  | 14,414 |  | $ | 42.85 |
$46.54 - $65.71 | 2,883 |  | 10.09 |  | $ | 65.71 |  | 2,883 |  | $ | 65.71 |
| 317,417 |  | 43.07 |  | $ | 18.78 |  | 298,420 |  | $ | 17.95 |
Disclosure of assumptions used in determining fair value of options granted | The following assumptions were used in the Black-Scholes option pricing model in determining the fair value of options granted during the years ended December 31:
| 2020 | 2019
Expected life | 4.0 |  | 4.0 |
Expected volatility | 37.9 | % | 37.1 | %
Expected dividend yield | 1.1 | % | 1.0 | %
Risk-free interest rate | 0.8 | % | 2.0 | %
Weighted average exercise price (CAD$) | $ | 39.45 |  | $ | 26.54 |
Weighted average fair value (CAD$) | $ | 15.80 |  | $ | 8.34 |
Disclosure of dividends | The Company declared the following dividends for the years ended December 31, 2020 and 2019:
Declaration Date | Record date | Dividend per common share
February 17, 2021 (1) | March 1, 2021 | $ | 0.0700 |
November 4, 2020 | November 16, 2020 | $ | 0.0700 |
August 5, 2020 | August 17, 2020 | $ | 0.0500 |
May 6, 2020 | May 19, 2020 | $ | 0.0500 |
February 19, 2020 | March 2, 2020 | $ | 0.0500 |
November 6, 2019 | November 18, 2019 | $ | 0.0350 |
August 7, 2019 | August 19, 2019 | $ | 0.0350 |
May 8, 2019 | May 21, 2019 | $ | 0.0350 |
February 20, 2019 | March 4, 2019 | $ | 0.0350 |
(1)These dividends were declared subsequent to the year end and have not been recognized as distributions to owners during the period presented.
Performance Share Units [member] |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Disclosure of number and aggregate fair value of other equity instruments | At December 31, 2020, the following PSUs were outstanding:
PSU | Number Outstanding | Fair Value
As at December 31, 2018 | 210,409 |  | $ | 3,091 |
Granted | 75,311 |  | 1,784 |
Paid out | (38,119) |  | (903) |
Change in value | — |  | 1,924 |
As at December 31, 2019 | 247,601 |  | $ | 5,896 |
Granted | 62,920 |  | 1,942 |
Paid out | (54,962) |  | (2,626) |
Forfeited | — |  | — |
Change in value | — |  | 3,658 |
As at December 31, 2020 | 255,559 |  | $ | 8,870 |
Restricted Share Units [member] |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Disclosure of number and aggregate fair value of other equity instruments | At December 31, 2020, the following RSUs were outstanding:
RSU | Number Outstanding | Fair Value
As at December 31, 2018 | 328,823 |  | $ | 3,624 |
Granted | 146,594 |  | 3,891 |
Paid out | (157,584) |  | (3,140) |
Forfeited | (18,617) |  | (441) |
Change in value | — |  | 3,173 |
As at December 31, 2019 | 299,216 |  | $ | 7,107 |
Granted | 261,224 |  | 6,302 |
Paid out | (148,049) |  | (4,762) |
Forfeited | (15,819) |  | (545) |
Change in value | — |  | 5,628 |
As at December 31, 2020 | 396,572 |  | $ | 13,730 |

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