Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Oct. 01, 2021	Oct. 02, 2020
Deferred tax assets:
Inventory	$ 15,800	$ 12,100
Accrued compensation and benefits	12,700	10,100
Product returns, allowances and warranty	900	400
Share-based and other deferred compensation	31,800	25,900
Net operating loss carry forwards	7,100	7,400
Federal tax credits	17,000	16,500
State tax credits	126,900	115,500
Deferred Tax Assets, Property, Plant and Equipment	35,800	24,300
Other - net	15,000	5,900
Deferred tax assets	350,500	261,500
Less valuation allowance	(150,000)	(137,400)
Net deferred tax assets	200,500	124,100
Deferred tax liabilities:
Prepaid insurance	(15,600)	(7,500)
Property, plant and equipment	(38,600)	(26,400)
Intangible assets	(5,300)	(7,600)
Deferred Tax Liabilities, Net	99,900	83,000
Total deferred tax assets	100,600	41,100
Deferred Tax Liabilities, Leasing Arrangements	(40,400)	(41,500)
deferred tax asset, leasing arrangements	45,400	43,400
Deferred Tax Assets, Prepaids	42,100	0
Deferred Income Tax Assets, Net	119,500	55,300
Other Noncurrent Liabilities [Member]
Deferred tax liabilities:
Deferred Income Tax Liabilities, Net	(18,900)	(14,200)
Income Taxes [Line Items]
Deferred Income Tax Liabilities, Net	$ 18,900	$ 14,200