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Nature of Business and Summary of Significant Accounting Policies (Narrative) (Details) |  | 3 Months Ended | 12 Months Ended |  |  |  |
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Apr. 03, 2019 USD ($) | Nov. 30, 2019 USD ($) | Nov. 30, 2018 USD ($) | Nov. 30, 2019 USD ($) enterprise_customer developer software_vendor | Nov. 30, 2018 USD ($) | Nov. 30, 2017 USD ($) | Nov. 30, 2016 | Dec. 01, 2019 USD ($) | Aug. 31, 2019 USD ($) | Dec. 01, 2018 USD ($) | Dec. 01, 2017 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of independent software vendors, more than | software_vendor |  |  |  |  | 1,700 |  |  |  |  |  |  |  |  |
Number of enterprise customers, more than | enterprise_customer |  |  |  |  | 100,000 |  |  |  |  |  |  |  |  |
Number of developers, more than | developer |  |  |  |  | 2,000,000 |  |  |  |  |  |  |  |  |
Capitalized software development costs |  | $ 0 | $ 0 |  | $ 0 | $ 0 |  | $ 0 |  |  |  |  |  |
Amortization |  |  |  |  | 49,127,000 | 37,561,000 | [1] | 35,370,000 | [1] |  |  |  |  |
Impairment of goodwill and intangible assets |  |  |  |  | 0 | 0 |  | 0 |  |  |  |  |  |
Long-lived asset impairment charges |  | 1,400,000 | 5,100,000 |  | 0 | 5,147,000 | [1],[2] | 0 | [1],[2] |  |  |  |  |
Contract with customer, asset, before allowance for credit loss |  | 4,000,000.0 |  |  | 4,000,000.0 |  |  |  |  |  |  |  |  |
Deferred contract costs |  | 1,700,000 |  |  | 1,700,000 |  |  |  |  |  |  |  |  |
Advertising costs |  |  |  |  | 800,000 | 1,400,000 |  | 1,500,000 |  |  |  |  |  |
Acquisition-related expenses |  |  |  |  | 1,658,000 | 258,000 | [2] | 1,458,000 | [2] |  |  |  |  |
Restructuring related costs |  |  |  |  | 6,331,000 | 2,251,000 | [2] | 22,210,000 | [2] |  |  |  |  |
Other assets, noncurrent |  | (3,532,000) | (5,243,000) | [3] | (3,532,000) | (5,243,000) | [3] |  |  |  |  |  |  |
Retained earnings |  | 64,303,000 | 85,125,000 | [3] | 64,303,000 | 85,125,000 | [3] |  |  |  |  |  |  |
Deferred tax assets |  | 18,601,000 | 966,000 | [3] | 18,601,000 | 966,000 | [3] |  |  |  |  |  |  |
Adjustment due to adoption of ASU |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,781,000 | $ 0
Decrease in deferred revenue |  | $ (177,246,000) | (135,940,000) |  | $ (177,246,000) | (135,940,000) |  |  |  |  |  |  |  |
Increase in deferred tax liabilities |  |  | $ 4,833,000 |  |  | 4,833,000 |  |  |  |  |  |  |  |
Internal Use Software |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful lives of major asset |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  | $ 0 | $ 200,000 |  | $ 600,000 |  |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation service period |  |  |  |  | 3 years |  |  | 3 years |  | 3 years |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized contract cost, amortization period |  | 3 years |  |  | 3 years |  |  |  |  |  |  |  |  |
Minimum | Computer equipment and software |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful lives of major asset |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |
Minimum | Buildings and Improvements |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful lives of major asset |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |
Minimum | Furniture and fixtures |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful lives of major asset |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |
Minimum | Stock Options |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation service period |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized contract cost, amortization period |  | 5 years |  |  | 5 years |  |  |  |  |  |  |  |  |
Maximum | Computer equipment and software |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful lives of major asset |  |  |  |  | 7 years |  |  |  |  |  |  |  |  |
Maximum | Buildings and Improvements |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful lives of major asset |  |  |  |  | 39 years |  |  |  |  |  |  |  |  |
Maximum | Furniture and fixtures |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful lives of major asset |  |  |  |  | 7 years |  |  |  |  |  |  |  |  |
Maximum | Stock Options |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation service period |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |
Accounting Standards Update 2016-16 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets, noncurrent |  |  |  |  |  |  |  |  |  |  |  |  | 3,400,000 |
Retained earnings |  |  |  |  |  |  |  |  |  |  |  |  | 3,400,000 |
Deferred tax assets |  |  |  |  |  |  |  |  |  |  |  | $ 8,200,000 |  |
Accounting Standards Update 2014-09 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease in deferred revenue |  |  |  |  |  |  |  |  |  |  |  |  | 15,000,000 |
Increase in unbilled receivables |  |  |  |  |  |  |  |  |  |  |  |  | 28,000,000 |
Increase in deferred tax liabilities |  |  |  |  |  |  |  |  |  |  |  |  | 12,000,000 |
Modulus | Purchased technology |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of software development costs |  |  |  |  | $ 22,700,000 |  |  |  |  |  |  |  |  |
Retained Earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment due to adoption of ASU |  |  |  |  |  |  |  |  |  |  |  |  | 4,781,000 | $ (641,000)
Retained Earnings | Accounting Standards Update 2016-16 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment due to adoption of ASU |  | $ 4,800,000 |  |  | $ 4,800,000 |  |  |  |  |  |  |  |  |
Retained Earnings | Accounting Standards Update 2014-09 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment due to adoption of ASU |  |  |  |  |  |  |  |  |  |  |  |  | $ 31,000,000 |
Software licenses |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period of payments of licenses upon execution of contract |  |  |  |  | 30 days |  |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on disposal | $ 100,000 |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |
Subsequent Event | Accounting Standards Update 2016-02 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right-of-use asset |  |  |  |  |  |  |  |  |  |  | $ 26,000,000 |  |  |
Operating lease, liability |  |  |  |  |  |  |  |  |  |  | 28,000,000 |  |  |
Subsequent Event | Accounting Standards Update 2016-02 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Right-of-use asset |  |  |  |  |  |  |  |  |  |  | 30,000,000 |  |  |
Operating lease, liability |  |  |  |  |  |  |  |  |  |  | $ 32,000,000 |  |  |
[1] | The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.
[2] | The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.
[3] | The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.

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