Revenue (Disaggregation Of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	$ 310,944	$ 293,004	$ 646,893	$ 598,279
Global Ingredients [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	126,543	120,892	254,895	255,734
Global Ingredients [Member] | Organic and non-GMO ingredients [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	103,674	101,938	209,916	207,822
Global Ingredients [Member] | Premium juice [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	22,869	18,954	44,979	37,566
Global Ingredients [Member] | Soy and corn [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	0	0	0	10,346
Plant-Based Foods And Beverages [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	91,705	81,940	197,947	163,216
Plant-Based Foods And Beverages [Member] | Beverages and broths [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	68,451	61,036	155,221	125,818
Plant-Based Foods And Beverages [Member] | Plant-based ingredients [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	6,284	5,835	12,196	10,517
Plant-Based Foods And Beverages [Member] | Sunflower and roasted snacks [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	16,970	15,069	30,530	26,881
Fruit-Based Foods And Beverages [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	92,696	90,172	194,051	179,329
Fruit-Based Foods And Beverages [Member] | Frozen Fruit [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	75,079	65,952	150,286	131,144
Fruit-Based Foods And Beverages [Member] | Fruit-based ingredients [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	7,946	12,770	19,838	24,256
Fruit-Based Foods And Beverages [Member] | Fruit snacks [Member]
Disaggregation of Revenue [Line Items]
Segment revenues from external customers	$ 9,671	$ 11,450	$ 23,927	$ 23,929