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Goodwill and other Identifiable Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross carrying amount | $ 80,136 | $ 80,413 | $ 80,136 |
Accumulated amortization | (70,408) | (73,628) | (70,408) |
Net | 9,728 | 6,785 | 9,728 |
Intangible impairment charge | 361 | 0 | 361 | 0
Purchased and Core Technology |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross carrying amount | 45,960 | 45,952 | 45,960 |
Accumulated amortization | (44,306) | (45,162) | (44,306) |
Net | 1,654 | 790 | 1,654 |
Intangible impairment charge | 200 |  |  |
License Agreements |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross carrying amount | 2,440 | 2,440 | 2,440 |
Accumulated amortization | (2,440) | (2,440) | (2,440) |
Net | 0 | 0 | 0 |
Intangible impairment charge | 100 |  |  |
Patents and Trademarks |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross carrying amount | 11,322 | 11,667 | 11,322 |
Accumulated amortization | (9,000) | (9,799) | (9,000) |
Net | 2,322 | 1,868 | 2,322 |
Intangible impairment charge | 100 |  |  |
Customer Relationships |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross carrying amount | 18,954 | 18,894 | 18,954 |
Accumulated amortization | (14,130) | (15,445) | (14,130) |
Net | 4,824 | 3,449 | 4,824 |
Non-compete Agreements |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross carrying amount | 1,100 | 1,100 | 1,100 |
Accumulated amortization | (202) | (422) | (202) |
Net | 898 | 678 | 898 |
Order Backlog |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross carrying amount | 360 | 360 | 360 |
Accumulated amortization | (330) | (360) | (330) |
Net | $ 30 | $ 0 | $ 30 |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + Details
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