SHARE CAPITAL, OPTION PLANS AND SHARE-BASED PAYMENTS - Schedule of Share-Based Payments (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 11,736	$ 6,891
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	3,294	2,010
Performance Share Units | Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	2,484	1,400
Restricted Stock Units (RSUs) | Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	2,002	1,660
Restricted Stock Units (RSUs) | Other plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	1,986	10
Deferred Share Units (directors)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	738	751
Employee Share Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 1,232	$ 1,060