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SHARE CAPITAL, OPTION PLANS AND SHARE-BASED PAYMENTS (Tables)
6 Months Ended
Dec. 31, 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 December 31,Six Months Ended December 31,
 2021202020212020
Stock options$4,748 $4,575 $9,015 $7,869 
Performance Share Units (issued under LTIP)3,726 2,555 7,171 5,039 
Restricted Share Units (issued under LTIP)1,930 1,956 4,096 3,958 
Restricted Share Units (other)1,019 3,084 2,747 5,070 
Deferred Share Units (directors)1,324 1,075 2,154 1,813 
Employee Stock Purchase Plan1,662 1,281 3,160 2,513 
Total share-based compensation expense$14,409 $14,526 $28,343 $26,262 
Summary of Option Activity
A summary of activity under our stock option plans for the six months ended December 31, 2021 is as follows:
OptionsWeighted-
Average Exercise
Price
Weighted-
Average
Remaining
Contractual Term
(years)
Aggregate Intrinsic Value
($’000's)
Outstanding at June 30, 20218,113,574 $40.16 4.88$86,297 
Granted1,304,110 52.35 
Exercised(852,569)34.33 
Forfeited or expired(352,755)44.41 
Outstanding at December 31, 20218,212,360 $42.52 4.87$47,275 
Exercisable at December 31, 20212,448,802 $36.40 3.41$27,144 
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 December 31,Six Months Ended December 31,
 2021202020212020
Weighted–average fair value of options granted$9.73 $7.33 $9.74 $8.38 
Weighted-average assumptions used:
Expected volatility26.66 %26.64 %26.63 %26.18 %
Risk–free interest rate0.90 %0.26 %0.64 %0.20 %
Expected dividend yield1.63 %1.75 %1.58 %1.54 %
Expected life (in years)4.134.154.154.66
Forfeiture rate (based on historical rates)%%%%
Average exercise share price$51.61 $41.44 $52.35 $45.36