Other Comprehensive Income (Schedule of OCI) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jul. 03, 2021	Apr. 03, 2021	Jun. 27, 2020	Mar. 28, 2020	Jul. 03, 2021	Jun. 27, 2020
Before-Tax Amount:
Amortization of prior service cost	$ 6		$ 8		$ 11	$ 16
Amortization of actuarial loss	1,053		854		2,105	1,708
Total defined benefit pension plans	1,059		862		2,116	1,724
Foreign currency translation	22,560		20,852		(17,177)	(45,035)
Other Comprehensive income (loss)	30,559		20,911		(15,127)	(42,771)
Tax (Expense) or Benefit:
Amortization of prior service cost	(2)		(2)		(3)	(4)
Amortization of actuarial loss	(265)		(213)		(529)	(425)
Total defined benefit pension plans	(267)		(215)		(532)	(429)
Foreign currency translation	(176)		(713)		1,339	(62)
Other Comprehensive income (loss)	(3,113)		(1,582)		744	(633)
Net-of-Tax Amount:
Amortization of prior service cost	4		6		8	12
Amortization of actuarial loss	788		641		1,576	1,283
Total defined benefit pension plans	792		647		1,584	1,295
Foreign currency translation	22,384	$ (38,222)	20,139	$ (65,236)	(15,838)	(45,097)
Total other comprehensive income/(loss), net of tax	27,446		19,329		(14,383)	(43,404)
Soybean Meal
Before-Tax Amount:
Loss (gain) reclassified to net income	32		0		(248)	0
Gain (loss) activity recognized in other comprehensive loss	(55)		0		(119)	0
Total swap derivatives	(23)		0		(367)	0
Tax (Expense) or Benefit:
Loss (gain) reclassified to net income	8		0		(63)	0
Gain (loss) activity recognized in other comprehensive loss	(14)		0		(30)	0
Total swap derivatives	(6)		0		(93)	0
Net-of-Tax Amount:
Loss (gain) reclassified to net income	24		0		(185)	0
Gain (loss) activity recognized in other comprehensive loss	(41)		0		(89)	0
Total swap derivatives	(17)	(257)	0		(274)	0
Corn Option
Before-Tax Amount:
Loss (gain) reclassified to net income	6,743		639		10,663	939
Gain (loss) activity recognized in other comprehensive loss	(7,220)		1,768		(12,213)	1,649
Total swap derivatives	(477)		2,407		(1,550)	2,588
Tax (Expense) or Benefit:
Loss (gain) reclassified to net income	(1,712)		(160)		(2,708)	(235)
Gain (loss) activity recognized in other comprehensive loss	1,833		(443)		3,102	(413)
Total swap derivatives	121		(603)		394	(648)
Net-of-Tax Amount:
Loss (gain) reclassified to net income	5,031		479		7,955	704
Gain (loss) activity recognized in other comprehensive loss	(5,387)		1,325		(9,111)	1,236
Total swap derivatives	(356)	(800)	1,804	136	(1,156)	1,940
Heating Oil Swaps And Options
Before-Tax Amount:
Gain (loss) activity recognized in other comprehensive loss	(3,094)		(11,921)		1,550	2,573
Total swap derivatives	(3,094)		(11,921)		1,550	2,573
Tax (Expense) or Benefit:
Gain (loss) activity recognized in other comprehensive loss	786		2,981		(394)	(643)
Total swap derivatives	786		2,981		(394)	(643)
Net-of-Tax Amount:
Gain (loss) activity recognized in other comprehensive loss	(2,308)		(8,940)		1,156	1,930
Total swap derivatives	(2,308)		(8,940)		1,156	1,930
Foreign Exchange Contract
Before-Tax Amount:
Loss (gain) reclassified to net income	(838)		(4,835)		(614)	(5,247)
Gain (loss) activity recognized in other comprehensive loss	11,372		13,546		915	626
Total swap derivatives	10,534		8,711		301	(4,621)
Tax (Expense) or Benefit:
Loss (gain) reclassified to net income	394		1,176		319	1,305
Gain (loss) activity recognized in other comprehensive loss	(3,977)		(4,208)		(475)	(156)
Total swap derivatives	(3,583)		(3,032)		(156)	1,149
Net-of-Tax Amount:
Loss (gain) reclassified to net income	(444)		(3,659)		(295)	(3,942)
Gain (loss) activity recognized in other comprehensive loss	7,395		9,338		440	470
Total swap derivatives	$ 6,951	$ (6,806)	$ 5,679	$ (9,151)	$ 145	$ (3,472)