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Goodwill and Other Identifiable Intangible Assets, Net (Tables) | 6 Months Ended
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Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Amortizable Identifiable Intangible Assets | Amortizable identifiable intangible assets were (in thousands):
| March 31, 2017 |  | September 30, 2016
| Gross carrying amount |  | Accum. amort. |  | Net |  | Gross carrying amount |  | Accum. amort. |  | Net
Purchased and core technology | $ | 50,720 |  |  | $ | (45,079 | ) |  | $ | 5,641 |  |  | $ | 46,594 |  |  | $ | (44,999 | ) |  | $ | 1,595 |
License agreements | 18 |  |  | (12 | ) |  | 6 |  |  | 18 |  |  | (10 | ) |  | 8 |
Patents and trademarks | 12,334 |  |  | (10,974 | ) |  | 1,360 |  |  | 11,619 |  |  | (10,871 | ) |  | 748 |
Customer relationships | 21,517 |  |  | (15,930 | ) |  | 5,587 |  |  | 17,463 |  |  | (15,773 | ) |  | 1,690 |
Non-compete agreements | 600 |  |  | (30 | ) |  | 570 |  |  | — |  |  | — |  |  | — |
Total | $ | 85,189 |  |  | $ | (72,025 | ) |  | $ | 13,164 |  |  | $ | 75,694 |  |  | $ | (71,653 | ) |  | $ | 4,041 |
Schedule of Estimated Future Amortization Expense Related to Identifiable Intangible Assets | Estimated amortization expense related to identifiable intangible assets for the remainder of fiscal 2017 and the five succeeding fiscal years is (in thousands):
2017 (six months) | $ | 1,255 |
2018 | 2,475 |
2019 | 1,989 |
2020 | 1,476 |
2021 | 1,268 |
2022 | 1,097 |
Schedule of Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill are (in thousands):
| Six months ended March 31,
| 2017 |  | 2016
Beginning balance, October 1 | $ | 109,448 |  |  | $ | 100,183 |
Acquisitions | 21,206 |  |  | 11,020 |
Foreign currency translation adjustment | (733 | ) |  | (496 | )
Ending balance, March 31 | $ | 129,921 |  |  | $ | 110,707 |

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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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