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INCOME TAXES (Significant components of deferred income tax assets and liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Jan. 01, 2017
Jan. 03, 2016
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Unrecognized deferred tax assets $ (67,200) $ (27,500)  
Net deferred tax assets 0 1,500  
Deferred tax liabilities (3,713) 0  
Deferred income taxes (3,713) 1,500 $ 2,793
Before Offset Amount [Member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Unrecognized deferred tax assets (67,152) (27,529)  
Net deferred tax assets 30,231 110,857  
Deferred tax liabilities (33,944) (109,357)  
Deferred income taxes (3,713) 1,500  
Before Offset Amount [Member] | Temporary differences      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 97,383 138,386  
Before Offset Amount [Member] | Non-capital losses      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 75,433 76,345  
Before Offset Amount [Member] | Non-deductible reserves and accruals      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 5,712 49,856  
Before Offset Amount [Member] | Property, plant and equipment      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 9,629 7,239  
Deferred tax liabilities (24,239) (32,703)  
Before Offset Amount [Member] | Other      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 6,609 4,946  
Before Offset Amount [Member] | Intangible assets      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax liabilities $ (9,705) $ (76,654)