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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 25, 2021
Dec. 26, 2020
Components of Deferred Tax Assets and Liabilities [Abstract]    
Tax credits $ 41,650 $ 42,927
Inventory reserve 13,691 13,401
Other reserves and accruals 8,523 8,610
Non-statutory stock options 2,837 2,794
Lease liability 6,717 6,934
Depreciation and amortization 17,912 20,961
Net operating loss carryforwards 18,395 18,421
Gross deferred tax assets 109,725 114,048
Valuation allowance (40,698) (38,466)
Total deferred tax assets 69,027 75,582
Right of use asset (5,910) (6,074)
Acquired intangibles and fixed assets (4,522) (8,395)
Unrealized investment gains (105) (106)
Tax on undistributed earnings (118) (110)
Total deferred tax liabilities (10,655) (14,685)
Net deferred tax assets $ 58,372 $ 60,897