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INTANGIBLE ASSETS AND GOODWILL (Narrative) (Details)	12 Months Ended
	Dec. 29, 2019 USD ($)	Dec. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Disclosure of detailed information about intangible assets [line items]
Write-downs and impairments	$ 0
Intangible assets	$ 383,864,000	$ 393,573,000	$ 393,573,000
Key assumption used in estimation of unit's recoverable amount, EBITDA multiple	11
Computer software
Disclosure of detailed information about intangible assets [line items]
Intangible assets	$ 26,220,000		$ 21,790,000
Computer software | Internally-generated
Disclosure of detailed information about intangible assets [line items]
Intangible assets	0	0
Computer software, assets not yet utilized in operations
Disclosure of detailed information about intangible assets [line items]
Intangible assets	$ 9,900,000	$ 5,900,000

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- Definition

The amount of impairment loss recognised in profit or loss for intangible assets and goodwill. [Refer: Impairment loss recognised in profit or loss; Intangible assets and goodwill]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2019-01-01
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