Business Combinations (Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Jun. 01, 2017	Mar. 01, 2017	Aug. 31, 2017	Nov. 30, 2016
Business Acquisition [Line Items]
Goodwill			$ 315,913	$ 278,067
Kinvey, Inc. [Member]
Business Acquisition [Line Items]
Net working capital	$ 891
Property, plant and equipment	26
Net deferred tax assets	533
Goodwill	25,211
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