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Goodwill and Intangible Assets (Tables)

6 Months Ended

Mar. 27, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

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


	Goodwill
Balance at September 27, 2019	$	334,829
Acquired goodwill	—
Translation adjustments	(1,850)
Balance at March 27, 2020	$	332,979

Schedule of Finite-Lived Intangible Assets

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


	March 27, 2020										September 27, 2019
Intangible Assets	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
Acquired patents and technology	$	341,531	$	(191,399)	$	150,132	$	338,075	$	(176,867)	$	161,208
Customer relationships	64,705		(47,271)		17,434		64,728		(45,510)		19,218
Other intangibles	22,926		(22,575)		351		22,902		(22,437)		465
Total	$	429,162	$	(261,245)	$	167,917	$	425,705	$	(244,814)	$	180,891

With regard to our purchase of intangible assets during the periods presented, the following table summarizes the consideration paid, the weighted-average useful lives over which the acquired assets will be amortized using the greater of either the straight-line basis or a ratio-to-revenue method, and the classification of their amortized expense in our consolidated statements of operations:


Fiscal Period	Total Purchase Consideration (1)	Weighted-Average Useful Life
	(in millions)	(in years)













Fiscal 2019
Q1 - Quarter ended December 28, 2018	$12.1	11.6
Q2 - Quarter ended March 29, 2019	$5.0	4.0


	$17.1	9.3
Fiscal 2020
Q1 - Quarter ended December 27, 2019	$2.9	14.0
Q2 - Quarter ended March 27, 2020	None


	$2.9	14.0

(1) Amortization expense on the intangible assets from patent portfolio and business acquisitions is included within cost of revenue, R&D, S&M, and G&A in our consolidated statements of operations.

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

As of March 27, 2020, estimated amortization expense in future fiscal periods was as follows (in thousands):


Fiscal Year	Amortization Expense
	(in thousands)
Remainder of 2020	$	15,583
2021	30,987
2022	28,386
2023	23,965
2024	21,931
Thereafter	47,065
Total	$	167,917