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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)

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