Nature of Business and Summary of Significant Accounting Policies (Narrative) (Details)		3 Months Ended			12 Months Ended
	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.