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Share Capital, Option Plans and Share-Based Payments (Tables) | 6 Months Ended
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Dec. 31, 2019
Share-based Payment Arrangement [Abstract] |
Summary of Share-based Compensation Costs | Total share-based compensation expense for the periods indicated below is detailed as follows:
| Three Months Ended December 31, |  | Six Months Ended December 31,
| 2019 |  | 2018 |  | 2019 |  | 2018
Stock options | $ | 2,667 |  |  | $ | 2,319 |  |  | $ | 4,677 |  |  | $ | 4,921 |
Performance Share Units (issued under LTIP) | 1,521 |  |  | 851 |  |  | 2,921 |  |  | 1,694 |
Restricted Share Units (issued under LTIP) | 1,309 |  |  | 1,626 |  |  | 2,969 |  |  | 3,011 |
Restricted Share Units (other) | 10 |  |  | 52 |  |  | 20 |  |  | 133 |
Deferred Share Units (directors) | 1,124 |  |  | 1,032 |  |  | 1,875 |  |  | 1,693 |
Employee Share Purchase Plan | 1,152 |  |  | 1,005 |  |  | 2,212 |  |  | 1,988 |
Total share-based compensation expense | $ | 7,783 |  |  | $ | 6,885 |  |  | $ | 14,674 |  |  | $ | 13,440 |
Summary of Option Activity | A summary of activity under our stock option plans for the six months ended December 31, 2019 is as follows:
| Options |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value ($’000s)
Outstanding at June 30, 2019 | 7,102,753 |  |  | $ | 31.82 |  |  |  |  |
Granted | 982,440 |  |  | 39.33 |  |  |  |  |
Exercised | (414,682 | ) |  | 27.39 |  |  |  |  |
Forfeited or expired | (158,906 | ) |  | 34.48 |  |  |  |  |
Outstanding at December 31, 2019 | 7,511,605 |  |  | $ | 32.99 |  |  | 4.02 |  | $ | 83,257 |
Exercisable at December 31, 2019 | 2,855,956 |  |  | $ | 28.42 |  |  | 2.55 |  | $ | 44,688 |
Schedule of Weighted-Average Fair Value of Options and Weighted-Average Assumptions Used | For the periods indicated, the weighted-average fair value of options and weighted-average assumptions were as follows:
| Three Months Ended December 31, |  | Six Months Ended December 31,
| 2019 |  | 2018 |  | 2019 |  | 2018
Weighted–average fair value of options granted | $ | 6.74 |  |  | $ | 7.37 |  |  | $ | 6.49 |  |  | $ | 8.55 |
Weighted-average assumptions used: |  |  |  |  |  |  |
Expected volatility | 22.03 | % |  | 25.95 | % |  | 22.09 | % |  | 26.05 | %
Risk–free interest rate | 1.55 | % |  | 2.97 | % |  | 1.65 | % |  | 2.82 | %
Expected dividend yield | 1.64 | % |  | 1.73 | % |  | 1.67 | % |  | 1.49 | %
Expected life (in years) | 4.11 |  |  | 4.32 |  |  | 4.11 |  |  | 4.32 |
Forfeiture rate (based on historical rates) | 7 | % |  | 6 | % |  | 7 | % |  | 6 | %
Average exercise share price | $ | 41.13 |  |  | $ | 33.97 |  |  | $ | 39.33 |  |  | $ | 38.56 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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