Segmented Information (Narrative) (Details)	6 Months Ended
Jun. 30, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Description Of Effect On Previously Reported Segment Information For Change In Composition Of Reportable Segments	Effective the first quarter of 2018, the Company transferred certain of its specialty ingredient operations from the Raw Material Sourcing and Supply operating segment to the Healthy Beverages platform of the Consumer Products operating segment. This realignment reflects a change in commercial responsibilities for these operations, and resulting changes in reporting and accountability to the Company’s Chief Executive Officer. These operations produce liquid bases, including for the Company’s non-dairy aseptic beverage operations, as well as spray-dried ingredients. For the quarter ended June 30, 2018, these operations generated revenues of $1.1 million (July 1, 2017 – $3.3 million) and gross profit of $0.2 million (July 1, 2017 – $0.5 million). For the two quarters ended June 30, 2018, these operations generated revenues of $4.5 million (July 1, 2017 – $6.9 million) and gross profit of $0.7 million (July 1, 2017 – $1.0 million). The segment information presented below for the quarter and two quarters ended July 1, 2017 has been restated to reflect this realignment.

Segmented Information (Narrative) (Details)

6 Months Ended

Jun. 30, 2018

Segment Reporting, Revenue Reconciling Item [Line Items]

Description Of Effect On Previously Reported Segment Information For Change In Composition Of Reportable Segments

Effective the first quarter of 2018, the Company transferred certain of its specialty ingredient operations from the Raw Material Sourcing and Supply operating segment to the Healthy Beverages platform of the Consumer Products operating segment. This realignment reflects a change in commercial responsibilities for these operations, and resulting changes in reporting and accountability to the Company’s Chief Executive Officer. These operations produce liquid bases, including for the Company’s non-dairy aseptic beverage operations, as well as spray-dried ingredients. For the quarter ended June 30, 2018, these operations generated revenues of $1.1 million (July 1, 2017 – $3.3 million) and gross profit of $0.2 million (July 1, 2017 – $0.5 million). For the two quarters ended June 30, 2018, these operations generated revenues of $4.5 million (July 1, 2017 – $6.9 million) and gross profit of $0.7 million (July 1, 2017 – $1.0 million). The segment information presented below for the quarter and two quarters ended July 1, 2017 has been restated to reflect this realignment.