SHARE CAPITAL, OPTION PLANS AND SHARE-BASED PAYMENTS - RSUs, DSUs and ESPP (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of treasury stock (in shares)	691,181	491,244	509,721
Issuance of treasury stock	$ (1,067)	$ 0	$ 0
Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Issuance of treasury stock (in shares)	290,971
Issuance of treasury stock	$ 12,700
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued (in shares)	400,210	141,452	0
Stock issued	$ 17,600	$ 5,900	$ 0
Restricted Stock Units (RSUs) \| Long Term Incentive Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	2 years
Restricted Stock Units (RSUs) \| Long Term Incentive Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Deferred Share Units (DSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued (in shares)		0	23,640
Issuance of treasury stock (in shares)	30,273
Issuance of treasury stock	$ 1,100	$ 0	$ 1,100
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards purchase price discount	15.00%
Common shares eligible for issuance (in shares)	1,089,120	931,036	769,031
Cash received from employee stock purchase plan	$ 31,000	$ 34,500	$ 30,500

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