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Goodwill and Other Identifiable Intangible Assets, Net Goodwill (Details) (USD $) | 0 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2014 industry | Jun. 30, 2013 | Sep. 30, 2013
Goodwill [Roll Forward] |  |  |  |
Beginning balance | $ 104,329,000 | $ 103,569,000 | $ 86,209,000 |
Acquisition of Etherios, Inc. |  | 0 | 17,120,000 |
Foreign currency translation adjustment |  | 760,000 | (718,000) |
Ending balance | 104,329,000 | 104,329,000 | 102,611,000 |
Goodwill [Line Items] |  |  |  |
Market capitalization | 235,800,000 | 235,800,000 |  |
Carrying value | $ 273,352,000 | $ 273,352,000 |  | $ 274,585,000
Control premium percent | 35.00% |  |  |
Percent fair value in excess of carrying value of goodwill | 16.00% | 16.00% |  |
Target companies equity benchmark | 50.00% | 50.00% |  |
Number of industries encompasses similar products | 3 | 3 |  |
Minimum [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Control premium percent | 30.00% |  |  |
Maximum [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Control premium percent | 40.00% |  |  |

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- Definition Percentage above fair value that an investor seeking to acquire control of an entity will pay, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + 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 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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