Business Combinations (Narrative) (Details) - USD ($)			3 Months Ended
	Jun. 01, 2017	Mar. 01, 2017	Feb. 28, 2018	Feb. 28, 2017	Nov. 30, 2017
Business Acquisition [Line Items]
Goodwill			$ 315,106,000		$ 315,041,000
Acquisition-related expenses			43,000	$ 49,000
Kinvey, Inc. [Member]
Business Acquisition [Line Items]
Percentage of voting interests acquired	100.00%
Total purchase consideration	$ 49,200,000
Retention bonus paid to founder	300,000
Goodwill	$ 24,351,000
DataRPM Corporation [Member]
Business Acquisition [Line Items]
Percentage of voting interests acquired		100.00%
Total purchase consideration		$ 30,000,000
Goodwill		12,583,000
Acquisition-related expenses			$ 0
Restricted Stock Units [Member] | DataRPM Corporation [Member]
Business Acquisition [Line Items]
Consideration payable in form of restricted stock units		$ 1,700,000
Award vesting period		2 years