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SHARE CAPITAL, OPTION PLANS AND SHARE-BASED PAYMENTS - Long-Term Incentive Plans (Details) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Issuance of treasury stock (in shares) 292,401 255,502 486,081 255,502
Payments for repurchase of common stock $ 0 $ 0 $ 41,870,000 $ 12,424,000
Long Term Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Term of plan     3 years  
Compensation cost related to unvested awards not yet recognized $ 40,500,000   $ 40,500,000  
Unvested stock awards compensation cost, weighted average recognition period     2 years 1 month 6 days  
Issuance of treasury stock (in shares) 292,401      
Payments for repurchase of common stock $ 11,200,000