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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Jan. 01, 2022 | Dec. 26, 2020
--- | --- | ---
Deferred tax assets: |  |
Accrued expenses and reserves | $ 36,168 | $ 31,123
Domestic and non-U.S. net operating loss carryforwards | 27,818 | 24,763
Domestic and non-U.S. interest expense carryforwards | 16,089 | 10,352
Excess of tax basis over the book basis for intangible assets and goodwill | 5,636 | 0
Capitalized expenses | 4,878 | 4,178
U.S. research and other general business tax credit carryforwards | 1,104 | 3,724
U.S. foreign tax credit carryforwards | 980 | 772
Other | 183 | 117
Gross deferred tax assets | 92,856 | 75,029
Less: Valuation allowance | (34,869) | (13,131)
Total deferred tax assets | 57,987 | 61,898
Deferred tax liabilities: |  |
Excess of book basis over the tax basis for intangible assets and goodwill | 98,046 | 76,472
Tax on unremitted earnings | 15,467 | 14,223
Unrealized foreign currency exchange gains | 73 | 5,719
Excess of book basis over the tax basis for property, plant, and equipment | 12,563 | 4,394
Total deferred tax liabilities | 126,149 | 100,808
Net deferred tax liabilities | $ 68,162 | $ 38,910

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