Revenue Recognition (Summary of Contract Assets and Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 24, 2021	Sep. 25, 2020
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 232,609	$ 180,340
Other non-current assets	61,257	91,245
Contract liabilities	18,473	15,436
Non-current contract liabilities	23,713	24,342
Other non-current liabilities	105,310	$ 122,154
Change ($)
Accounts receivable, net	52,269
Contract assets	20,959
Contract liabilities - current	3,037
Contract liabilities - non-current	$ (629)
Change (%)
Accounts receivable, net	29.00%
Contract assets	13.00%
Contract liabilities - current	20.00%
Contract liabilities - non-current	(3.00%)