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Restructuring Charges (Narrative) (Details) | 3 Months Ended |
--- | --- | ---
Feb. 28, 2017 USD ($) | Feb. 29, 2016 USD ($) | Nov. 30, 2015 segment | May 31, 2015 USD ($) | Feb. 28, 2015 facility | Nov. 30, 2016 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring expenses | $ 17,139,000 | $ (66,000) |  |  |  |
Restructuring reserve | $ 12,136,000 |  |  |  |  | $ 1,550,000
2017 Restructuring Activities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Global workforce reduction (as a percent) | 20.00% |  |  |  |  |
Restructuring expenses | $ 17,112,000 |  |  |  |  |
Restructuring reserve | 11,107,000 |  |  |  |  | 0
2017 Restructuring Activities [Member] | Other Accrued Liabilities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Short-term portion of restructuring reserve | 11,000,000 |  |  |  |  |
2017 Restructuring Activities [Member] | Other Noncurrent Liabilities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Long-term portion of restructuring reserve | 100,000 |  |  |  |  |
2016 Restructuring Activities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring expenses | 0 |  |  |  |  |
Restructuring reserve | 972,000 |  |  |  |  | 1,415,000
2015 Restructuring Activities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of facilities closed | facility |  |  |  |  | 2 |
Number of operating segments | segment |  |  | 3 |  |  |
Level 3 [Member] | Nonrecurring Basis [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Long-lived assets at fair value |  |  |  | $ 100,000 |  |
Telerik AD [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Impairment of long-lived assets |  |  |  | $ 4,000,000 |  |
Telerik AD [Member] | 2015 Restructuring Activities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring expenses | (17,000) |  |  |  |  |
Restructuring reserve | 17,000 |  |  |  |  | 85,000
Severance [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring expenses | 16,079,000 |  |  |  |  |
Restructuring reserve | 11,698,000 |  |  |  |  | 1,443,000
Severance [Member] | 2017 Restructuring Activities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Expected additional restructuring costs | 1,000,000 |  |  |  |  |
Restructuring expenses | 16,079,000 |  |  |  |  |
Restructuring reserve | 10,709,000 |  |  |  |  | 0
Severance [Member] | 2016 Restructuring Activities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring reserve | 972,000 |  |  |  |  | 1,415,000
Severance [Member] | Telerik AD [Member] | 2015 Restructuring Activities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring expenses | (11,000) |  |  |  |  |
Restructuring reserve | 17,000 |  |  |  |  | 28,000
Facility-Related Charges [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring expenses | 1,060,000 |  |  |  |  |
Restructuring reserve | 438,000 |  |  |  |  | 107,000
Facility-Related Charges [Member] | 2017 Restructuring Activities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Expected additional restructuring costs | 3,000,000 |  |  |  |  |
Restructuring expenses | 1,033,000 |  |  |  |  |
Restructuring reserve | 398,000 |  |  |  |  | 0
Facility-Related Charges [Member] | 2016 Restructuring Activities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring reserve | 0 |  |  |  |  | 0
Facility-Related Charges [Member] | Telerik AD [Member] | 2015 Restructuring Activities [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring expenses | (6,000) |  |  |  |  |
Restructuring reserve | $ 0 |  |  |  |  | $ 57,000

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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 225 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68048823&loc=d3e92212-112881 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Impairment -URI http://asc.fasb.org/extlink&oid=6515133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 + Details
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