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Restructuring Charges (Narrative) (Details) (USD $) | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 9 Months Ended |  |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |
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Aug. 31, 2013 | Aug. 31, 2012 | Aug. 31, 2013 | Aug. 31, 2012 | Aug. 31, 2013 2013 Restructuring Activities [Member] | Nov. 30, 2012 2013 Restructuring Activities [Member] | Aug. 31, 2013 2013 Restructuring Activities [Member] Income (loss) from discontinued operations [Member] | Aug. 31, 2013 2013 Restructuring Activities [Member] Income (loss) from discontinued operations [Member] | Aug. 31, 2013 2013 Restructuring Activities [Member] Excess Facilities and Other Costs [Member] | Nov. 30, 2012 2013 Restructuring Activities [Member] Excess Facilities and Other Costs [Member] | Aug. 31, 2013 2013 Restructuring Activities [Member] Employee Severance and Related Benefits [Member] | Nov. 30, 2012 2013 Restructuring Activities [Member] Employee Severance and Related Benefits [Member] | Aug. 31, 2013 2013 Restructuring Activities [Member] Other accrued liabilities [Member] | Aug. 31, 2013 2012 Restructuring Activities [Member] | Nov. 30, 2012 2012 Restructuring Activities [Member] | Aug. 31, 2013 2012 Restructuring Activities [Member] Income (loss) from discontinued operations [Member] | Aug. 31, 2013 2012 Restructuring Activities [Member] Excess Facilities and Other Costs [Member] | Nov. 30, 2012 2012 Restructuring Activities [Member] Excess Facilities and Other Costs [Member] | Aug. 31, 2013 2012 Restructuring Activities [Member] Employee Severance and Related Benefits [Member] | Nov. 30, 2012 2012 Restructuring Activities [Member] Employee Severance and Related Benefits [Member]
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring expenses | $ 5,401,000 | $ 1,411,000 | $ 9,127,000 | $ 6,147,000 | $ 6,104,000 |  | $ 400,000 | $ 400,000 | $ 388,000 |  | $ 5,716,000 |  |  | $ 4,057,000 |  | $ 600,000 | $ 1,213,000 |  | $ 2,844,000 |
Expected restructuring costs |  |  |  |  |  |  |  |  | 1,300,000 |  | 6,500,000 |  |  |  |  |  |  |  |  |
Restructuring reserve |  |  |  |  | 5,078,000 | 0 |  |  | 368,000 | 0 | 4,710,000 | 0 | 5,100,000 | 1,788,000 | 7,032,000 |  | 1,032,000 | 603,000 | 756,000 | 6,429,000
Restructuring cumulative expenses |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,100,000 |  |  | 3,900,000 |  | 19,200,000 |
Short-term restructuring reserves |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,600,000 |  |  |  |  |  |
Long-term restructuring reserves |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000 |  |  |  |  |  |

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- Definition Amount of costs incurred to date for the specified type of restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 146 -Paragraph 20 -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 95-3 -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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140904-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Definition Amount expected to be charged against earnings in the current and future periods for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 146 -Paragraph 20 -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 95-3 -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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=6394695&loc=d3e140904-122747 + Details
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