Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Parent [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Natural Gas Swap [Member]	Natural Gas Swap [Member] Parent [Member]	Natural Gas Swap [Member] AOCI Attributable to Parent [Member]	Corn Option [Member]	Corn Option [Member] Parent [Member]	Corn Option [Member] AOCI Attributable to Parent [Member]
Balance (in shares) at Dec. 29, 2012			117,814,991
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 29, 2012	$ 1,062,436	$ 1,062,436	$ 1,186	$ 603,836	$ (10,033)	$ (31,329)	$ 498,776	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	108,967	108,967					108,967
Pension adjustments	15,140	15,140				15,140
Total natural gas derivatives									$ 127	$ 127	$ 127	$ 1,141	$ 1,141	$ 1,141
Total other comprehensive income, net of tax	1,906	(14,502)				(14,502)
Foreign currency translation adjustments	(14,502)
Issuance of non-vested stock (in shares)			387,681
Issuance of non-vested stock	6,539	6,539	$ 4	6,535
Stock-based compensation	50	50		50
Tax benefits associated with stock-based compensation	1,138	1,138		1,138
Treasury stock (in shares)			(185,919)
Treasury stock	(3,238)	(3,238)			(3,238)
Issuance of common stock (in shares)			46,250,672
Issuance of common stock	843,154	843,154	$ 463	842,691
Balance (in shares) at Dec. 28, 2013			164,267,425
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 28, 2013	2,020,952	2,020,952	$ 1,653	1,454,250	(13,271)	(29,423)	607,743	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	90,919							90,919
Net income	68,311	64,215					64,215	4,096
Distribution of noncontrolling interest earnings	(4,272)							(4,272)
Additions (Deductions) to noncontrolling interests	1,201							1,201
Pension adjustments	(20,381)	(20,381)				(20,381)
Total natural gas derivatives									$ (113)	$ (113)	$ (113)	(1,259)	(1,259)	(1,259)
Total other comprehensive income, net of tax	(141,437)	(125,884)				(125,884)
Foreign currency translation adjustments	(119,684)					(119,684)		6,200
Issuance of non-vested stock (in shares)			209,827
Issuance of non-vested stock	4,371	4,371	$ 2	4,369
Stock-based compensation	9,993	9,993		9,993
Tax benefits associated with stock-based compensation	2,420	2,420		2,420
Treasury stock (in shares)			(507,552)
Treasury stock	(9,936)	(9,936)			(9,936)
Issuance of common stock (in shares)			742,963
Issuance of common stock	8,612	8,612	$ 7	8,605
Balance (in shares) at Jan. 03, 2015			164,712,663
Balance at Jan. 03, 2015	1,952,990
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jan. 03, 2015	2,051,134	1,952,990	$ 1,662	1,479,637	(23,207)	(177,060)	671,958	98,144
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	85,279	78,531					78,531	6,748
Distribution of noncontrolling interest earnings	(3,295)							(3,295)
Additions (Deductions) to noncontrolling interests	(87)							(87)
Pension adjustments	4,202	4,202				4,202
Total natural gas derivatives												$ 1,767	$ 1,767	$ 1,767
Total other comprehensive income, net of tax	(156,467)	(164,827)				(164,827)
Foreign currency translation adjustments	(162,436)					(162,436)		2,391
Issuance of non-vested stock (in shares)			261,615
Issuance of non-vested stock	3,791	3,791	$ 3	3,788
Stock-based compensation	2,083	2,083		2,083
Tax benefits associated with stock-based compensation	(389)	(389)		(389)
Treasury stock (in shares)			(834,477)
Treasury stock	(11,109)	(11,109)			(11,109)
Issuance of common stock (in shares)			595,575
Issuance of common stock	3,670	3,670	$ 6	3,664
Balance (in shares) at Jan. 02, 2016			164,735,376
Balance at Jan. 02, 2016	1,870,709
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jan. 02, 2016	$ 1,974,610	$ 1,870,709	$ 1,671	$ 1,488,783	$ (34,316)	$ (335,918)	$ 750,489	$ 103,901