Nature of Business and Summary of Significant Accounting Policies (Narrative) (Details)	3 Months Ended			12 Months Ended
	Nov. 30, 2019 USD ($)	Nov. 30, 2018 USD ($)		Nov. 30, 2020 USD ($) software_vendor enterprise_customer developer	Nov. 30, 2019 USD ($)	Nov. 30, 2018 USD ($)		Aug. 31, 2019 USD ($)	Feb. 28, 2019 USD ($)	Dec. 01, 2018 USD ($)	Dec. 01, 2017 USD ($)	Nov. 30, 2017 USD ($)
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				3
Capitalized software development costs	$ 0	$ 0		$ 0	$ 0	$ 0
Amortization				28,621,000	49,127,000	37,561,000	[1]
Impairment of goodwill and intangible assets				0	0	0
Long-lived asset impairment charges	1,400,000	5,100,000		0	0	5,147,000	[1],[2]
Other comprehensive income (loss), tax				1,600,000	400,000
Advertising costs				500,000	800,000	1,400,000
Acquisition-related expenses				3,637,000	1,658,000	258,000	[2]
Restructuring related costs				5,906,000	6,331,000	2,251,000	[2]
Other assets, noncurrent	(3,532,000)			(6,299,000)	(3,532,000)
Deferred tax assets	18,601,000	966,000		14,490,000	18,601,000	966,000
Stockholders' equity attributable to parent	330,282,000	324,002,000	[3]	346,013,000	330,282,000	324,002,000	[3]					$ 404,381,000	[3]
Decrease in deferred revenue	(177,246,000)			(193,295,000)	(177,246,000)
Cumulative Effect, Period of Adoption, Adjustment
Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity attributable to parent		4,781,000				4,781,000						0
Retained Earnings
Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity attributable to parent	$ 64,303,000	85,125,000	[3]	$ 72,547,000	64,303,000	85,125,000	[3]					172,951,000	[3]
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment
Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity attributable to parent		$ 4,781,000				4,781,000						$ (641,000)
Accounting Standards Update 2016-16
Summary Of Significant Accounting Policies [Line Items]
Other assets, noncurrent										$ 3,400,000
Deferred tax assets								$ 8,200,000	$ 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
Accounting Standards Update 2014-09 | Retained Earnings
Summary Of Significant Accounting Policies [Line Items]
Stockholders' equity attributable to parent											$ 31,000,000
Restricted Stock Units (RSUs)
Summary Of Significant Accounting Policies [Line Items]
Stock-based compensation service period				3 years
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
Modulus | Purchased Technology
Summary Of Significant Accounting Policies [Line Items]
Impairment of software development costs					22,700,000
Minimum | Stock Options
Summary Of Significant Accounting Policies [Line Items]
Stock-based compensation service period				4 years
Minimum | Software licenses
Summary Of Significant Accounting Policies [Line Items]
Expected timing of satisfaction, period				1 year
Minimum | Maintenance
Summary Of Significant Accounting Policies [Line Items]
Expected timing of satisfaction, period				1 year
Minimum | Services
Summary Of Significant Accounting Policies [Line Items]
Expected timing of satisfaction, period				1 year
Maximum | Stock Options
Summary Of Significant Accounting Policies [Line Items]
Stock-based compensation service period				5 years
Maximum | Software licenses
Summary Of Significant Accounting Policies [Line Items]
Expected timing of satisfaction, period				3 years
Maximum | Maintenance
Summary Of Significant Accounting Policies [Line Items]
Expected timing of satisfaction, period				3 years
Maximum | Services
Summary Of Significant Accounting Policies [Line Items]
Expected timing of satisfaction, period				3 years
Computer equipment and software | Minimum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of major asset				3 years
Computer equipment and software | Maximum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of major asset				7 years
Buildings and Improvements | Minimum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of major asset				5 years
Buildings and Improvements | Maximum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of major asset				39 years
Furniture and fixtures | Minimum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of major asset				5 years
Furniture and fixtures | Maximum
Summary Of Significant Accounting Policies [Line Items]
Useful lives of major asset				7 years
Internal Use Software
Summary Of Significant Accounting Policies [Line Items]
Useful lives of major asset				3 years
Amortization				$ 0	$ 0	$ 200,000

[1] (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] (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.

[3] (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.