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Income Taxes - Significant Components of Company's Deferred Tax Assets and Liabilities (Detail) - USD ($) | Sep. 25, 2021 | Sep. 26, 2020
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Deferred tax assets |  |
Net operating loss carryforwards | $ 91,500,000 | $ 81,100,000
Capital losses | 52,000,000.0 | 57,000,000.0
Non-deductible accruals | 34,900,000 | 24,900,000
Non-deductible reserves | 41,800,000 | 33,200,000
Stock-based compensation | 17,600,000 | 18,600,000
Tax credits | 10,000,000.0 | 10,200,000
Nonqualified deferred compensation plan | 16,800,000 | 14,400,000
Lease liability | 16,200,000 | 17,300,000
Other temporary differences | 17,400,000 | 25,200,000
Deferred tax assets, gross | 298,200,000 | 281,900,000
Less: valuation allowance | (121,300,000) | (118,500,000)
Deferred tax assets, net | 176,900,000 | 163,400,000
Deferred tax liabilities |  |
Depreciation and amortization | (389,700,000) | (333,900,000)
Right of use asset | (15,800,000) | (15,800,000)
Deferred tax liabilities, net | (405,500,000) | (349,700,000)
Net deferred tax liabilities | $ (228,600,000) | $ (186,300,000)

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