Goodwill and Intangible Assets (Tables)

3 Months Ended

Dec. 25, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table outlines changes to the carrying amount of goodwill (in thousands):

	Goodwill
Balance at September 25, 2020	$	336,945
Translation adjustments	1,768
Balance at December 25, 2020	$	338,713

Schedule of Finite-Lived Intangible Assets

Intangible assets subject to amortization consist of the following (in thousands):

	December 25, 2020						September 25, 2020
Intangible Assets	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
Acquired patents and technology	$	343,203	$	(213,545)	$	129,658	$	342,637	$	(206,123)	$	136,514
Customer relationships	64,759		(49,951)		14,808		64,740		(49,062)		15,678
Other intangibles	22,993		(22,771)		222		22,969		(22,730)		239
Total	$	430,955	$	(286,267)	$	144,688	$	430,346	$	(277,915)	$	152,431

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

As of December 25, 2020, expected amortization expense of our intangible assets in future fiscal periods was as follows (in thousands):

Fiscal Year	Amortization Expense
Remainder of 2021	$	23,185
2022	28,291
2023	23,923
2024	21,894
2025	6,840
Thereafter	40,555
Total	$	144,688