Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Before-Tax Amount
Actuarial (loss)/gain recognized	$ (2,202)	$ (7,901)	$ 4,027
Amortization of actuarial loss	4,571	3,543	4,786
Actuarial prior service cost recognized	9	(11)
Amortization of curtailment		498
Amortization of prior service costs	34	35	35
Amortization of settlement	66	(3)	42
Other	16	9	30
Total defined benefit pension plans	2,494	(3,830)	8,920
Tax (Expense) or Benefit
Actuarial (loss)/gain recognized	211	2,015	(1,264)
Amortization of actuarial loss	(1,143)	(910)	(1,801)
Actuarial prior service cost recognized	(2)	3
Amortization of curtailment		0
Amortization of prior service costs	(9)	(9)	(11)
Amortization of settlement	(16)	1	(15)
Other	0	0	0
Total defined benefit pension plans	(959)	1,100	(3,091)
Net-of-Tax Amount
Actuarial (loss)/gain recognized	(1,991)	(5,886)	2,763
Amortization of actuarial loss	3,428	2,633	2,985
Actuarial prior service cost recognized	7	(8)
Amortization of prior service costs	25	26	24
Amortization of curtailment	0	498
Amortization of settlement	50	(2)	27
Other	16	9	30
Total defined benefit pension plans	1,535	(2,730)	5,829
Before-Tax Amount
Other comprehensive income	(12,771)	(89,198)	121,810
Tax (Expense) or Benefit
Other comprehensive income	837	1,724	0
Net-of-Tax Amount
Foreign currency translation adjustments	(11,934)	(87,474)	121,810
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	2,651	2,847	(2,396)
Other comprehensive income/(loss)	(19,636)	(93,634)	128,939
Total other comprehensive income/(loss), net of tax	(16,985)	(90,787)	126,543
Soybean Meal [Member]
Before-Tax Amount
Gain/(loss) reclassified to net income		(8)
Gain/(loss) recognized in other comprehensive income (loss)		8
Total derivatives		0
Tax (Expense) or Benefit
Gain/(loss) reclassified to net income		2
Gain/(loss) recognized in other comprehensive income (loss)		(2)
Total derivatives		0
Net-of-Tax Amount
Gain/(loss) reclassified to net income		(6)
Gain/(loss) recognized in other comprehensive income (loss)		6
Total derivatives, net of tax		0
Natural Gas Swap [Member]
Before-Tax Amount
Gain/(loss) reclassified to net income		14	35
Gain/(loss) recognized in other comprehensive income (loss)	(4,188)	16	(65)
Total natural gas derivatives	(4,188)	30	(30)
Tax (Expense) or Benefit
Gain/(loss) reclassified to net income		(3)	(14)
Gain/(loss) recognized in other comprehensive income (loss)	1,047	(4)	26
Total derivatives	1,047	(7)	12
Net-of-Tax Amount
Gain/(loss) reclassified to net income		11	21
Gain/(loss) recognized in other comprehensive income (loss)	(3,141)	12	(39)
Total derivatives, net of tax	0	23	(18)
Total derivatives	(3,141)	23	(18)
Corn Option [Member]
Before-Tax Amount
Gain/(loss) reclassified to net income	422	(1,912)	(5,255)
Gain/(loss) recognized in other comprehensive income (loss)	(51)	(361)	3,494
Total natural gas derivatives	371	(2,273)	(1,761)
Tax (Expense) or Benefit
Gain/(loss) reclassified to net income	(106)	493	2,039
Gain/(loss) recognized in other comprehensive income (loss)	13	93	(1,356)
Total derivatives	(93)	586	683
Net-of-Tax Amount
Gain/(loss) reclassified to net income	316	(1,419)	(3,216)
Gain/(loss) recognized in other comprehensive income (loss)	(38)	(268)	2,138
Total derivatives, net of tax	278	(1,687)	(1,078)
Total derivatives	278	(1,687)	(1,078)
Foreign Exchange Contract [Member]
Before-Tax Amount
Gain/(loss) reclassified to net income	1,345
Gain/(loss) recognized in other comprehensive income (loss)	(6,887)	1,637
Total derivatives	(5,542)	1,637
Tax (Expense) or Benefit
Gain/(loss) reclassified to net income	(442)
Gain/(loss) recognized in other comprehensive income (loss)	2,261	(556)
Total derivatives	1,819	(556)
Net-of-Tax Amount
Gain/(loss) reclassified to net income	903
Gain/(loss) recognized in other comprehensive income (loss)	(4,626)	1,081
Total derivatives, net of tax	(3,723)	1,081	$ 0
Total derivatives	$ (3,723)	$ 1,081