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Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2012 | Nov. 30, 2013 | Nov. 30, 2012 | Nov. 30, 2011 | Jan. 21, 2010 Subsidiaries Defendants
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |
Rent expense, net of sub-rental income |  | $ 6.5 | $ 8.7 | $ 10.3 |
Number Of Subsidiaries Alleging Infringement |  |  |  |  | 2
Number Of Defendants Alleging Infringement Other Than Subsidiaries |  |  |  |  | 19
Settlement amount with JuxaComm | $ 0.9 |  |  |  |

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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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- Definition The amount of cash paid for the settlement of litigation or for other legal issues during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 27 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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