FINANCIAL INSTRUMENTS - Notional and Carrying Amounts of the Senior Unsecured Notes (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about hedging instruments [line items]
Carrying Amount	$ 489,964	$ 508,810
Senior Unsecured Notes
Disclosure of detailed information about hedging instruments [line items]
Carrying Amount	246,236	245,681
Senior Unsecured Notes \| Hedges of net investment
Disclosure of detailed information about hedging instruments [line items]
Notional Amount	250,000	250,000
Carrying Amount	$ 246,236	$ 245,681

The amount of outstanding funds that the entity is obligated to repay.

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- Definition

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

+ References

No definition available.

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- Definition

The amount of a hedging instrument, recognised as a liability. [Refer: Hedging instruments [member]]

+ References

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