Basis of Presentation - Consolidated Income Statement (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended			9 Months Ended
	Aug. 31, 2019	Aug. 31, 2018		Aug. 31, 2019	Aug. 31, 2018
Revenue:
Total revenue	$ 106,716	$ 92,603	[1]	$ 296,260	$ 280,877	[1]
Costs of revenue	20,825	16,696	[1]	54,475	50,242	[1]
Gross profit	85,891	75,907	[1]	241,785	230,635	[1]
Total operating expenses	69,931	56,804	[1]	195,675	173,851	[1]
Income from operations	15,960	19,103	[1]	46,110	56,784	[1]
Other expense, net	(3,718)	(1,961)	[1]	(8,038)	(4,830)	[1]
Income before income taxes	12,242	17,142	[1]	38,072	51,954	[1]
Provision for income taxes	(1,315)	2,752	[1]	6,932	10,928	[1]
Net income	$ 13,557	$ 14,390	[1]	$ 31,140	$ 41,026	[1]
Earnings per share:
Basic (in dollars per share)	$ 0.30	$ 0.32	[1]	$ 0.70	$ 0.90	[1]
Diluted (in dollars per share)	$ 0.30	$ 0.32	[1]	$ 0.69	$ 0.88	[1]
Weighted average shares outstanding:
Basic (in shares)	44,716	45,130	[1]	44,761	45,730	[1]
Diluted (in shares)	45,303	45,576	[1]	45,292	46,380	[1]
Software licenses
Revenue:
Total revenue	$ 30,686	$ 22,852	[1]	$ 83,216	$ 71,432	[1]
Costs of revenue	1,204	1,077	[1]	3,296	3,571	[1]
Maintenance and services
Revenue:
Total revenue	76,030	69,751	[1]	213,044	209,445	[1]
Costs of revenue	$ 12,163	10,110	[1]	$ 32,182	29,445	[1]
As Reported
Revenue:
Total revenue		95,683			285,832
Costs of revenue		16,696			50,242
Gross profit		78,987			235,590
Total operating expenses		56,804			173,851
Income from operations		22,183			61,739
Other expense, net		(1,961)			(4,830)
Income before income taxes		20,222			56,909
Provision for income taxes		3,476			11,848
Net income		$ 16,746			$ 45,061
Earnings per share:
Basic (in dollars per share)		$ 0.37			$ 0.99
Diluted (in dollars per share)		$ 0.37			$ 0.97
Weighted average shares outstanding:
Basic (in shares)		45,130			45,730
Diluted (in shares)		45,576			46,380
As Reported | Software licenses
Revenue:
Total revenue		$ 27,204			$ 78,986
As Reported | Maintenance and services
Revenue:
Total revenue		68,479			206,846
Accounting Standards Update 2014-09 | Adjustments
Revenue:
Total revenue		(3,080)			(4,955)
Costs of revenue		0			0
Gross profit		(3,080)			(4,955)
Total operating expenses		0			0
Income from operations		(3,080)			(4,955)
Other expense, net		0			0
Income before income taxes		(3,080)			(4,955)
Provision for income taxes		(724)			(920)
Net income		$ (2,356)			$ (4,035)
Earnings per share:
Basic (in dollars per share)		$ (0.05)			$ (0.09)
Diluted (in dollars per share)		$ (0.05)			$ (0.09)
Weighted average shares outstanding:
Basic (in shares)		0			0
Diluted (in shares)		0			0
Accounting Standards Update 2014-09 | Adjustments | Software licenses
Revenue:
Total revenue		$ (4,352)			$ (7,554)
Accounting Standards Update 2014-09 | Adjustments | Maintenance and services
Revenue:
Total revenue		$ 1,272			$ 2,599

[1] The Company adopted ASC 606 effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Basis of Presentation for further information.