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Goodwill and Intangible Assets
6 Months Ended
Apr. 01, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
Goodwill & Intangible Assets
Goodwill
The following table outlines changes to the carrying amount of goodwill (in thousands):
 
Goodwill
Balance at September 25, 2015
$
307,708

Translation adjustments
2,172

Balance at April 1, 2016
$
309,880

Intangible Assets
Our intangible assets are stated at their original cost less accumulated amortization, and principally consist of acquired technology, patents, trademarks, customer relationships and contracts. Intangible assets subject to amortization consist of the following (in thousands):
 
April 1, 2016
 
September 25, 2015
Intangible Assets, Net
Cost
Accumulated
Amortization
Net
 
Cost
Accumulated
Amortization
Net
Acquired patents and technology
$
278,222

$
(88,261
)
$
189,961

 
$
172,787

$
(74,398
)
$
98,389

Customer relationships
56,826

(31,262
)
25,564

 
56,933

(28,275
)
28,658

Other intangibles
22,722

(22,165
)
557

 
22,564

(22,104
)
460

Total
$
357,770

$
(141,688
)
$
216,082

 
$
252,284

$
(124,777
)
$
127,507


During both the fiscal year-to-date period ended April 1, 2016 and March 27, 2015, we purchased various patents and developed technology for cash consideration that enable us to further develop our audio, imaging and potential product offerings.
Patent Portfolio Acquisition.    On September 30, 2015, we completed an asset purchase of a patent portfolio that fits within our existing patent licensing programs for total consideration of $105.0 million. These assets are categorized within the "Acquired patents and technology" intangible asset class, and will be amortized over their weighted-average useful life of 9.0 years.
Other.    During the first quarter of fiscal 2016, we also acquired other intangible assets for cash consideration of $0.3 million, which will be amortized over their weighted-average useful life of 18.0 years.
With regard to our purchase of intangible assets during the periods presented, the following table summarizes the cash 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
Weighted-Average Useful Life
Income Statement Classification: Amortization Expense
 
(in millions)
(in years)
 
Fiscal 2015
 
 
 
Q1 - Quarter ended December 26, 2014
$6.4
18.0
Cost of Revenue
Q2 - Quarter ended March 27, 2015
0
 
 
$6.4
18.0
 
 
 
 
 
Fiscal 2016
 
 
 
Q1 - Quarter ended January 1, 2016
$105.3
9.0
Cost of Revenue
Q2 - Quarter ended April 1, 2016
0
 
 
$105.3
9.0
 
Amortization expense for our intangible assets is included in cost of licensing, cost of products, R&D and S&M expenses in our consolidated statements of operations. Amortization expense was $8.2 million and $5.6 million in the second quarter of fiscal 2016 and 2015, respectively, and $16.7 million and $11.0 million in the fiscal year-to-date period ended April 1, 2016 and March 27, 2015, respectively. As of April 1, 2016, estimated amortization expense in future fiscal periods was as follows (in thousands):
Fiscal Year
 Amortization Expense
Remainder of 2016
$
16,140

2017
29,660

2018
24,214

2019
23,630

2020
23,405

Thereafter
99,033

Total
$
216,082