Segmented Information (Disclosure of Segment Revenues and Operating Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment revenues from external customers	$ 310,944	$ 293,004	$ 646,893	$ 598,279
Segment operating income (loss)	16,506	2,203	33,771	5,669
Other income, net	333	(445)	1,631	43,067
Interest expense, net	(7,936)	(8,254)	(16,216)	(16,993)
Earnings (loss) before income taxes	1,229	(11,236)	5,706	23,857
Global Ingredients [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment revenues from external customers	126,543	120,892	254,895	255,734
Segment operating income (loss)	8,038	3,667	16,152	10,210
Plant-Based Foods And Beverages [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment revenues from external customers	91,705	81,940	197,947	163,216
Segment operating income (loss)	10,484	4,496	24,337	7,024
Fruit-Based Foods And Beverages [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment revenues from external customers	92,696	90,172	194,051	179,329
Segment operating income (loss)	(2,016)	(5,960)	(6,718)	(11,565)
Corporate Services [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment operating income (loss)	$ (7,674)	$ (4,740)	$ (13,480)	$ (7,886)