PENSION, POST-RETIREMENT AND OTHER LONG-TERM EMPLOYEE BENEFIT PLANS - Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Disclosure of defined benefits plan
Defined benefit obligations	$ 94,055	$ 83,476
Fair value of plan assets	(79,003)	(68,578)
Deficit in plans	15,052	14,898
U.S.
Disclosure of defined benefits plan
Defined benefit obligations	75,571	68,411
Fair value of plan assets	(63,877)	(56,186)
Deficit in plans	11,694	12,225
Canada
Disclosure of defined benefits plan
Defined benefit obligations	18,484	15,065
Fair value of plan assets	(15,126)	(12,392)
Deficit in plans	$ 3,358	$ 2,673

The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2019-01-01
-Paragraph 57
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_57_a&doctype=Standard
-URIDate 2019-03-27

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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.

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The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]]

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- Definition

The fair value of any plan assets, less the present value of the defined benefit obligation. [Refer: Plan assets [member]]

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