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Nature Of Business And Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) | 6 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended
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Feb. 28, 2013 product_lines | Nov. 30, 2013 Segments | Nov. 30, 2012 Segments | Nov. 30, 2011 | Nov. 30, 2013 Internal Use Software [Member] | Nov. 30, 2012 Internal Use Software [Member] | Nov. 30, 2011 Internal Use Software [Member] | Nov. 30, 2013 Restricted Stock Units (RSUs) [Member] | Nov. 30, 2013 Minimum [Member] Computer equipment and software [Member] | Nov. 30, 2013 Minimum [Member] Buildings And Improvements [Member] | Nov. 30, 2013 Minimum [Member] Furniture and fixtures [Member] | Nov. 30, 2013 Minimum [Member] Stock Options [Member] | Nov. 30, 2013 Maximum [Member] Computer equipment and software [Member] | Nov. 30, 2013 Maximum [Member] Buildings And Improvements [Member] | Nov. 30, 2013 Maximum [Member] Furniture and fixtures [Member] | Nov. 30, 2013 Maximum [Member] Stock Options [Member] | Jul. 31, 2013 Apama [Member] | Nov. 30, 2013 Apama [Member] | Nov. 30, 2013 Revenue [Member] customer | Nov. 30, 2012 Revenue [Member] customer | Nov. 30, 2011 Revenue [Member] customer | Nov. 30, 2013 Accounts Receivable [Member] customer | Nov. 30, 2012 Accounts Receivable [Member] customer | Nov. 30, 2011 Accounts Receivable [Member] customer
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of product lines divested | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments |  | 1 | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 44,268,000 | $ 44,268,000 |  |  |  |  |  |
Concentration risk, number of customers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 | 0 | 0 | 0
No single customer represented more than percentage of consolidated accounts receivables or revenue (percentage) |  | 10.00% | 10.00% | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful lives of major asset |  |  |  |  | 3 years |  |  |  | 3 years | 5 years | 5 years |  | 7 years | 39 years | 7 years |  |  |  |  |  |  |  |  |
Capitalized software development costs |  | 800,000 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization |  | 4,090,000 | 21,660,000 | 26,246,000 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets impairment charge |  | 111,000 | 898,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax effect on accumulated unrealized losses on investment |  | 1,400,000 | 1,500,000 | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advertising costs |  | 1,600,000 | 1,500,000 | 2,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation service period |  |  |  |  |  |  |  | 3 years |  |  |  | 4 years |  |  |  | 5 years |  |  |  |  |  |  |  |
Acquisition-related expenses |  | $ 3,204,000 | $ 215,000 | $ 536,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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