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Goodwill and Other Identifiable Intangible Assets, Net (Tables) | 3 Months Ended
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Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Amortizable Identifiable Intangible Assets | Amortizable identifiable intangible assets were (in thousands):
| December 31, 2016 |  | September 30, 2016
| Gross carrying amount |  | Accum. amort. |  | Net |  | Gross carrying amount |  | Accum. amort. |  | Net
Purchased and core technology | $ | 46,558 |  |  | $ | (44,756 | ) |  | $ | 1,802 |  |  | $ | 46,594 |  |  | $ | (44,999 | ) |  | $ | 1,595 |
License agreements | 18 |  |  | (12 | ) |  | 6 |  |  | 18 |  |  | (10 | ) |  | 8 |
Patents and trademarks | 11,537 |  |  | (10,846 | ) |  | 691 |  |  | 11,619 |  |  | (10,871 | ) |  | 748 |
Customer relationships | 17,432 |  |  | (15,632 | ) |  | 1,800 |  |  | 17,463 |  |  | (15,773 | ) |  | 1,690 |
Total | $ | 75,545 |  |  | $ | (71,246 | ) |  | $ | 4,299 |  |  | $ | 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 (nine months) | $ | 1,131 |
2018 | 1,321 |
2019 | 958 |
2020 | 401 |
2021 | 232 |
2022 | 163 |
Schedule of Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill are (in thousands):
| Three months ended December 31,
| 2016 |  | 2015
Beginning balance, October 1 | $ | 109,448 |  |  | $ | 100,183 |
Acquisitions | 2,737 |  |  | 11,020 |
Foreign currency translation adjustment | (1,069 | ) |  | (959 | )
Ending balance, December 31 | $ | 111,116 |  |  | $ | 110,244 |

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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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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + 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 + Details
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