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Supplemental Cash Flow Information (Tables)
3 Months Ended
Mar. 31, 2018
Supplemental Cash Flow Elements [Abstract]  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Quarter ended
March 31, 2018April 1, 2017
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Changes in non-cash working capital:
Accounts receivable(12,359)(11,127)
Inventories18,30226,358
Income tax recoverable/payable3,341(1,460)
Prepaid expenses and other current assets(5,376)(4,733)
Accounts payable and accrued liabilities38112,410
Customer and other deposits(1,400)1,887
2,88923,335