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Business Combinations (Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Jun. 01, 2017	Mar. 01, 2017	Feb. 28, 2018	Nov. 30, 2017
Business Acquisition [Line Items]
Goodwill			$ 315,106	$ 315,041
Kinvey, Inc. [Member]
Business Acquisition [Line Items]
Net working capital	$ (963)
Property, plant and equipment	26
Net deferred tax assets	1,465
Goodwill	24,351
Net assets acquired	48,879
DataRPM Corporation [Member]
Business Acquisition [Line Items]
Net working capital		$ (174)
Property, plant and equipment		68
Deferred taxes		(5,006)
Goodwill		12,583
Net assets acquired		28,271
Purchased technology [Member] | Kinvey, Inc. [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets	$ 22,100
Finite-lived intangible assets, useful life	5 years
Purchased technology [Member] | DataRPM Corporation [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets		$ 19,900
Finite-lived intangible assets, useful life		5 years
Trade name [Member] | Kinvey, Inc. [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets	$ 1,800
Finite-lived intangible assets, useful life	5 years
Trade name [Member] | DataRPM Corporation [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets		$ 800
Finite-lived intangible assets, useful life		5 years
Customer relationships [Member] | Kinvey, Inc. [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets	$ 100
Finite-lived intangible assets, useful life	5 years
Customer relationships [Member] | DataRPM Corporation [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets		$ 100
Finite-lived intangible assets, useful life		5 years

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities in Excess of Current Assets

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