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Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Sep. 27, 2019	Sep. 28, 2018
Deferred tax assets (liabilities):
Federal and foreign net operating losses and credits	$ 263,199	$ 321,982
Intangible assets	9,887
Intangible assets		(94,929)
Property and equipment	(1,473)	(6,293)
Other non-current deferred tax assets	16,933	13,850
Deferred compensation	0	3,810
Deferred gain	0	6,575
Interest	7,170	0
Valuation allowance	(252,536)	(243,112)
Total deferred tax asset	$ 43,180	$ 1,883

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill.

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