Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Parent [Member]	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings	Non-controlling Interest	Natural Gas Swap [Member]	Natural Gas Swap [Member] Parent [Member]	Natural Gas Swap [Member] Accumulated Other Comprehensive Loss	Corn Option [Member]	Corn Option [Member] Parent [Member]	Corn Option [Member] Accumulated Other Comprehensive Loss	Foreign Exchange Contract [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment to initially apply FASB ASC No. 2018-02 Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income	$ 0	$ 0				$ (4,782)	$ 4,782
Balance (in shares) at Dec. 30, 2017			164,653,437
Stockholders' Equity, Beginning Balance at Dec. 30, 2017	2,327,697	2,244,933	$ 1,679	$ 1,515,614	$ (44,063)	(209,524)	981,227	$ 82,764
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	98,075	97,305					97,305	770
Deductions to noncontrolling interests	(10,173)	0		0				(10,173)
Pension liability adjustments, net of tax	667	667				667
Foreign exchange derivative adjustment, net of tax									$ 22			$ (1,605)			$ 0
Derivatives									22	$ 22	$ 22	(1,605)	$ (1,605)	$ (1,605)
Foreign currency translation	17,295	16,778				16,778		517
Stock-based compensation	8,527	8,527		8,527
Treasury stock (in shares)			(159,758)
Treasury stock	(2,962)	(2,962)			(2,962)
Issuance of common stock (in shares)			153,983
Issuance of common stock	1,696	1,696	$ 1	1,695
Balance (in shares) at Mar. 31, 2018			164,647,662
Stockholders' Equity, Ending Balance at Mar. 31, 2018	2,439,239	2,365,361	$ 1,680	1,525,836	(47,025)	(198,444)	1,083,314	73,878
Balance (in shares) at Dec. 29, 2018			164,660,598
Stockholders' Equity, Beginning Balance at Dec. 29, 2018	2,335,821	2,273,048	$ 1,681	1,536,157	(47,756)	(304,539)	1,087,505	62,773
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,640	18,012					18,012	1,628
Pension liability adjustments, net of tax	858	858				858
Foreign exchange derivative adjustment, net of tax	(1,937)	(1,937)				(1,937)			$ 0			$ 0			$ (1,937)
Foreign currency translation	(4,886)	(6,645)				(6,645)		1,759
Stock-based compensation	10,403	10,403		10,403
Treasury stock (in shares)			(223,294)
Treasury stock	(5,089)	(5,089)			(5,089)
Issuance of common stock (in shares)			311,502
Issuance of common stock	1,889	1,889	$ 3	1,886
Balance (in shares) at Mar. 30, 2019			164,748,806
Stockholders' Equity, Ending Balance at Mar. 30, 2019	$ 2,356,699	$ 2,290,539	$ 1,684	$ 1,548,446	$ (52,845)	$ (312,263)	$ 1,105,517	$ 66,160