COMMITMENTS AND CONTINGENCIES (Building Acquisition Commitment) (Details) - Office Space Purchase Commitment - Ukraine $ in Thousands	3 Months Ended
Sep. 30, 2019 USD ($)
Other Commitments [Line Items]
Total commitment amount	$ 48,900
Other Noncurrent Assets
Other Commitments [Line Items]
Amount paid	$ 12,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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