Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Deferred tax assets:
Loss contingency reserves	$ 9,007	$ 8,546
Employee benefits	10,791	8,471
Pension liability	12,882	12,224
Intangible assets amortization, including taxable goodwill	1,566	1,475
Interest expense carryforwards	16,871	754
Tax loss carryforwards	103,618	89,660
Tax credit carryforwards	5,108	7,057
Inventory	8,583	6,295
Accrued liabilities and other	12,291	13,010
Total gross deferred tax assets	180,717	147,492
Less valuation allowance	(27,942)	(24,530)
Net deferred tax assets	152,775	122,962
Deferred tax liabilities:
Intangible assets amortization, including taxable goodwill	(152,841)	(170,294)
Property, plant and equipment depreciation	(164,011)	(166,217)
Investment in DGD Joint Venture	(44,857)	(29,516)
Tax on unremitted foreign earnings	(5,648)	(8,045)
Other	(1,500)	(1,555)
Total gross deferred tax liabilities	(368,857)	(375,627)
Net deferred tax liability	(216,082)	(252,665)
Non-current deferred tax asset	14,981	14,043
Non-current deferred tax liability	(231,063)	(266,708)
Class of Stock [Line Items]
Total gross deferred tax liabilities	$ (368,857)	$ (375,627)