Income Taxes - Schedule of Components of Net Deferred Income Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Sep. 29, 2018
Deferred income tax assets:
Loss/credit carryforwards	$ 28,391	$ 27,915
Inventories	16,809	6,459
Accrued benefits	15,834	14,459
Other	3,353	3,450
Total gross deferred income tax assets	64,387	52,283
Less valuation allowances	(29,170)	(28,369)
Deferred income tax assets	35,217	23,914
Deferred income tax liabilities:
Property, plant and equipment	15,621	12,530
Tax on unremitted earnings	5,192	14,935
Acceleration of revenue under Topic 606	6,055	0
Deferred income tax liabilities	26,868	27,465
Net deferred income tax assets	$ 8,349
Net deferred income tax liabilities		$ 3,551