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SEGMENT INFORMATION - Schedule of Total Assets by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 1,087,871	$ 1,411,507
North America
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	801,090	971,110
International
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	286,781	440,397
United States | North America
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	788,300	948,100
Switzerland | International
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		$ 151,700
LUXEMBOURG | International
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 126,600

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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