COMMITMENTS AND CONTINGENCIES (Building Acquisition Commitments) (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($)
Office Space Purchase Commitment \| Ukraine
Other Commitments [Line Items]
Total commitment amount	$ 36,900

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.

No definition available.

Name:	us-gaap_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration