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Share Capital, Option Plans and Share-Based Payments (Tables) | 6 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [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,
| 2018 |  | 2017 |  | 2018 |  | 2017
Stock options | $ | 2,319 |  |  | $ | 2,729 |  |  | $ | 4,921 |  |  | $ | 6,031 |
Performance Share Units (issued under LTIP) | 851 |  |  | 937 |  |  | 1,694 |  |  | 1,972 |
Restricted Share Units (issued under LTIP) | 1,626 |  |  | 1,513 |  |  | 3,011 |  |  | 3,399 |
Restricted Share Units (other) | 52 |  |  | 198 |  |  | 133 |  |  | 677 |
Deferred Share Units (directors) | 1,032 |  |  | 945 |  |  | 1,693 |  |  | 1,492 |
Employee Share Purchase Plan | 1,005 |  |  | 836 |  |  | 1,988 |  |  | 1,822 |
Total share-based compensation expense | $ | 6,885 |  |  | $ | 7,158 |  |  | $ | 13,440 |  |  | $ | 15,393 |
Summary of Option Activity | A summary of activity under our stock option plans for the six months ended December 31, 2018 is as follows:
| Options |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value ($’000s)
Outstanding at June 30, 2018 | 7,078,435 |  |  | $ | 28.41 |  |  |  |  |
Granted | 865,340 |  |  | 38.56 |  |  |  |  |
Exercised | (555,952 | ) |  | 25.48 |  |  |  |  |
Forfeited or expired | (269,296 | ) |  | 31.60 |  |  |  |  |
Outstanding at December 31, 2018 | 7,118,527 |  |  | $ | 29.75 |  |  | 4.28 |  | $ | 28,080 |
Exercisable at December 31, 2018 | 2,626,538 |  |  | $ | 25.41 |  |  | 2.92 |  | $ | 19,291 |
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,
| 2018 |  | 2017 |  | 2018 |  | 2017
Weighted–average fair value of options granted | $ | 7.37 |  |  | $ | 7.49 |  |  | $ | 8.55 |  |  | $ | 7.46 |
Weighted-average assumptions used: |  |  |  |  |  |  |
Expected volatility | 25.95 | % |  | 26.64 | % |  | 26.05 | % |  | 27.11 | %
Risk–free interest rate | 2.97 | % |  | 1.95 | % |  | 2.82 | % |  | 1.81 | %
Expected dividend yield | 1.73 | % |  | 1.48 | % |  | 1.49 | % |  | 1.45 | %
Expected life (in years) | 4.32 |  |  | 4.58 |  |  | 4.32 |  |  | 4.42 |
Forfeiture rate (based on historical rates) | 6 | % |  | 6 | % |  | 6 | % |  | 6 | %
Average exercise share price | $ | 33.97 |  |  | $ | 34.48 |  |  | $ | 38.56 |  |  | $ | 34.49 |

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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=109197908&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=109197908&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=109197908&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=109197908&loc=d3e5070-113901 + Details
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