Goodwill and Other Identifiable Intangible Assets, Net (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 80,921	$ 80,136
Accumulated amortization	(72,612)	(70,408)
Net	8,309	9,728
Purchased and Core Technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	46,169	45,960
Accumulated amortization	(44,937)	(44,306)
Net	1,232	1,654
License Agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	2,440	2,440
Accumulated amortization	(2,440)	(2,440)
Net	0	0
Patents and Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	11,755	11,322
Accumulated amortization	(9,546)	(9,000)
Net	2,209	2,322
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	19,097	18,954
Accumulated amortization	(15,017)	(14,130)
Net	4,080	4,824
Non-compete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,100	1,100
Accumulated amortization	(312)	(202)
Net	788	898
Order Backlog
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	360	360
Accumulated amortization	(360)	(330)
Net	$ 0	$ 30

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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