Goodwill and Intangible Assets (Tables)

9 Months Ended

Jun. 29, 2018

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 29, 2017	$	311,087
Acquired goodwill	4,807
Translation adjustments	(1,577		)
Balance at June 29, 2018	$	314,317

Schedule of Finite-Lived Intangible Assets

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

	June 29, 2018							September 29, 2017
Intangible Assets	Cost		Accumulated Amortization			Net		Cost		Accumulated Amortization			Net
Acquired patents and technology	$	314,799	$	(146,549	)	$	168,250	$	299,707	$	(128,986	)	$	170,721
Customer relationships	56,836		(40,345		)	16,491		56,843		(38,368		)	18,475
Other intangibles	22,734		(22,335		)	399		22,742		(22,290		)	452
Total	$	394,369	$	(209,229	)	$	185,140	$	379,292	$	(189,644	)	$	189,648

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 2017
Q1 - Quarter ended December 30, 2016	None
Q2 - Quarter ended March 31, 2017	5.3	18.0
	$5.3	18.0
Fiscal 2018
Q1 - Quarter ended December 29, 2017	$12.0	14.1
Q2 - Quarter ended March 30, 2018	$2.8	5.3
Q3 - Quarter ended June 29, 2018	$0.7	5.0
	$15.5	12.1

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

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

As of June 29, 2018, estimated amortization expense in future fiscal periods was as follows (in thousands):

Fiscal Year	Amortization Expense
Remainder of 2018	$	6,778
2019	26,525
2020	26,061
2021	26,034
2022	23,370
Thereafter	76,372
Total	$	185,140