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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Carry Amount of Goodwill | The changes in the carrying amount of goodwill are as follows:
| Aircraft Controls | Space and Defense Controls | Industrial Systems | Total
Balance at September 30, 2017 | $ | 181,375 |  | $ | 259,951 |  | $ | 332,942 |  | $ | 774,268 |
Acquisition | — |  | — |  | 23,026 |  | 23,026 |
Foreign currency translation | 2,558 |  | 332 |  | 4,468 |  | 7,358 |
Balance at March 31, 2018 | $ | 183,933 |  | $ | 260,283 |  | $ | 360,436 |  | $ | 804,652 |
Components of Intangible Assets | The components of intangible assets are as follows:
|  |  |  | March 31, 2018 |  | September 30, 2017
|  | Weighted- Average Life (years) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Gross Carrying Amount |  | Accumulated Amortization
Customer-related |  | 11 |  | $ | 147,256 |  |  | $ | (96,394 | ) |  | $ | 175,872 |  |  | $ | (128,019 | )
Technology-related |  | 9 |  | 71,442 |  |  | (50,665 | ) |  | 71,924 |  |  | (55,069 | )
Program-related |  | 19 |  | 69,020 |  |  | (34,007 | ) |  | 66,458 |  |  | (30,675 | )
Marketing-related |  | 8 |  | 25,135 |  |  | (18,642 | ) |  | 26,552 |  |  | (19,251 | )
Other |  | 10 |  | 4,563 |  |  | (3,652 | ) |  | 4,379 |  |  | (3,353 | )
Intangible assets |  | 12 |  | $ | 317,416 |  |  | $ | (203,360 | ) |  | $ | 345,185 |  |  | $ | (236,367 | )

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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