Income Taxes (Summary of the Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Oct. 03, 2020	Sep. 28, 2019
Deferred tax assets
Accrued compensation and benefits	$ 14,482	$ 15,014
Inventory reserves	5,229	4,510
163(j) interest disallowance	3,991	4,253
Other assets	5,893	4,565
Allowance for doubtful accounts	1,152	1,408
Net operating loss carryovers	1,533	2,103
State and foreign tax credit carryovers	870	1,224
Research and development tax credit carryovers	11,612	3,774
Deferred Tax Assets, Derivative Instruments	1,062	311
Total deferred tax asset before valuation allowance	45,824	37,162
Less valuation allowance	(5,933)	(5,279)
Total deferred tax assets	39,891	31,883
Deferred tax liabilities
Property and equipment	15,016	13,158
Foreign deferred revenue and other	10,330	5,779
Intangible assets	42,986	47,248
Total deferred tax liabilities	68,332	66,185
Net deferred tax liabilities, net	$ (28,441)	$ (34,302)