OTHER ASSETS - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]
OpenText share in net income of equity investees (note 9)	$ 6,221	$ 682
Minimum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	4.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	20.00%

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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