Income Taxes - Deferred Tax Assets and Liabilities (Details) (USD $)	12 Months Ended	0 Months Ended
	Jan. 03, 2015	Sep. 25, 2014	May 06, 2014	Mar. 05, 2013	Mar. 06, 2012	Dec. 28, 2013	Mar. 09, 2006
Deferred tax assets:
Loss contingency reserves	$ 11,500,000					$ 10,756,000
Employee benefits	11,866,000					9,749,000
Pension liability	20,106,000					4,183,000
Intangible assets amortization, including taxable goodwill	3,300,000					7,040,000
Net operating losses	75,920,000					4,732,000
Inventory	7,965,000					2,120,000
Other	11,130,000					7,186,000
Total gross deferred tax assets	141,787,000					45,766,000
Less valuation allowance	(18,037,000)					(871,000)
Net deferred tax assets	123,750,000					44,895,000
Deferred tax liabilities:
Intangible assets amortization, including taxable goodwill	189,877,000					63,779,000
Property, plant and equipment depreciation	203,602,000					67,535,000
Investment in DGD Joint Venture	(41,040,000)					(31,842,000)
Tax on unremitted foreign earnings	(47,870,000)					0
Other	3,368,000					3,209,000
Total gross deferred tax liabilities	485,757,000					166,365,000
Net deferred tax liability	(362,007,000)					(121,470,000)
Current deferred tax asset	45,001,000					17,289,000
Current deferred tax liability	(642,000)					0
Non-current deferred tax asset	16,431,000					0
Non-current deferred tax liability	(422,797,000)					(138,759,000)
Class of Stock [Line Items]
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent	400,000
Granted (in shares)	163,078
Total gross deferred tax liabilities	485,757,000					166,365,000
Director Restricted Stock Plan [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Stock Available for Grant Per Employee	$ 90,000						$ 60,000
Restricted Stock, Repurchase Price Per Share							$ 0.01
Restricted Stock Subject To Restrictions Percent							100.00%
Issuance of non-vested stock (in shares)				21,780	21,204
Granted (in shares)		2,998	22,680