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Goodwill And Intangible Assets
 12 Months Ended
Oct. 01, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill And Intangible Assets
Goodwill and Intangible Assets
The changes in the carrying amount of goodwill are as follows:
 
Aircraft
Controls
Space and
Defense
Controls
Industrial
Systems
Components
Total
Balance at September 28, 2013
$
192,413

$
163,136

$
121,320

$
290,055

$
766,924

Adjustments to prior year acquisitions
—

(2,734
)
—

—

(2,734
)
Foreign currency translation
439

(795
)
(3,311
)
(2,671
)
(6,338
)
Balance at September 27, 2014
192,852

159,607

118,009

287,384

757,852

Divestiture
—

—

—

(1,715
)
(1,715
)
Foreign currency translation
(4,327
)
(1,394
)
(7,166
)
(6,038
)
(18,925
)
Balance at October 3, 2015
188,525

158,213

110,843

279,631

737,212

Acquisitions
—

21,076

—

—

21,076

Impairment
—

(4,800
)
—

—

(4,800
)
Foreign currency translation
(8,831
)
25

(4,525
)
5

(13,326
)
Balance at October 1, 2016
$
179,694

$
174,514

$
106,318

$
279,636

$
740,162


We test goodwill for impairment at least annually, during our fourth quarter. We recorded a $4,800 goodwill impairment charge in 2016 in a reporting unit within our Space and Defense Controls segment, given the business outlook for this reporting unit. We estimated the fair value of this reporting unit principally using a discounted cash flow analysis.
Goodwill in our Medical Devices reporting unit, included in our Components segment, is net of a $38,200 accumulated impairment loss at October 1, 2016.
The components of intangible assets are as follows:

October 1, 2016
October 3, 2015
  
Weighted-
Average
Life (years)
Gross Carrying
Amount
Accumulated
Amortization
Gross Carrying
Amount
Accumulated
Amortization
Customer-related
11
$
165,445

$
(117,434
)
$
171,779

$
(110,697
)
Technology-related
9
70,277

(52,060
)
73,299

(49,723
)
Program-related
19
64,774

(26,018
)
75,720

(27,463
)
Marketing-related
9
25,031

(17,649
)
25,997

(16,648
)
Other
10
4,269

(3,075
)
4,771

(3,312
)
Intangible assets
12
$
329,796

$
(216,236
)
$
351,566

$
(207,843
)

Substantially all acquired intangible assets other than goodwill are being amortized. Customer-related intangible assets primarily consist of customer relationships. Technology-related intangible assets primarily consist of technology, patents, intellectual property and software. Program-related intangible assets consist of long-term programs represented by current contracts and probable follow on work. Marketing-related intangible assets primarily consist of trademarks, trade names and non-compete agreements.
Amortization of acquired intangible assets was $21,058 in 2016, $24,708 in 2015 and $29,907 in 2014. Based on acquired intangible assets recorded at October 1, 2016, amortization is estimated to be approximately $18,000 in 2017, $17,000 in 2018, $15,400 in 2019, $13,400 in 2020 and $8,000 in 2021.