Restructuring (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		$ 6,308	$ 5,906	$ 6,331
2021 Restructuring Activities
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		1,965
Short-term restructuring reserves		1,900
2020 Restructuring Activities
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		4,149	3,947
Short-term restructuring reserves		4,500
2019 Restructuring Activities
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		6	108	2,494
Ipswitch | 2019 Restructuring Activities
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		$ (9)	$ 1,486	$ 3,098
Trademarks and Trade Names | DataRPM and Kinvey
Restructuring Cost and Reserve [Line Items]
Impairment of intangible assets	$ 22,700