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SHARE CAPITAL, OPTION PLANS AND SHARE-BASED PAYMENTS (Tables)
3 Months Ended
Sep. 30, 2021
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 September 30,
 20212020
Stock options$4,267 $3,294 
Performance Share Units (issued under LTIP)3,445 2,484 
Restricted Share Units (issued under LTIP)2,166 2,002 
Restricted Share Units (other)1,728 1,986 
Deferred Share Units (directors)830 738 
Employee Stock Purchase Plan1,498 1,232 
Total share-based compensation expense$13,934 $11,736 
Summary of Option Activity
A summary of activity under our stock option plans for the three months ended September 30, 2021 is as follows:
OptionsWeighted-
Average Exercise
Price
Weighted-
Average
Remaining
Contractual Term
(years)
Aggregate Intrinsic Value
($’000's)
Outstanding at June 30, 20218,113,574 $40.16 4.88$86,297 
Granted950,360 52.62 
Exercised(796,187)34.29 
Forfeited or expired(183,483)44.93 
Outstanding at September 30, 20218,084,264 $42.10 5.03$57,378 
Exercisable at September 30, 20212,343,797 $36.22 3.59$29,347 
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 estimated under the Black-Scholes option-pricing model were as follows:
 Three Months Ended September 30,
 20212020
Weighted–average fair value of options granted$9.75 $8.50 
Weighted-average assumptions used:
Expected volatility26.62 %26.12 %
Risk–free interest rate0.55 %0.20 %
Expected dividend yield1.56 %1.52 %
Expected life (in years)4.164.72
Forfeiture rate (based on historical rates)%%
Average exercise share price$52.62 $45.81