Nature of Business and Summary of Significant Accounting Policies (Consolidated Income Statement) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Nov. 30, 2019	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2019	Nov. 30, 2018		Nov. 30, 2017
Revenue:
Total revenue	$ 117,038	$ 106,716	$ 99,995	$ 89,549	$ 98,104	$ 92,603	$ 92,864	$ 95,410	$ 413,298	$ 378,981	[1]	$ 389,154	[1]
Costs of revenue									75,241	66,973	[1]	69,159	[1]
Gross profit	96,272	85,891	82,384	73,510	81,373	75,907	76,221	78,507	338,057	312,008	[1]	319,995	[1]
Total operating expenses									297,973	244,194	[1]	262,505	[1]
Income from operations	(6,026)	15,960	14,741	15,409	11,030	19,103	18,550	19,131	40,084	67,814	[1]	57,490	[1]
Other expense, net									(11,589)	(7,018)	[1]	(5,027)	[1]
Income before income taxes									28,495	60,796	[1]	52,463	[1]
Provision for income taxes									2,095	11,126		23,442
Net income	$ (4,740)	$ 13,557	$ 8,181	$ 9,402	$ 8,644	$ 14,390	$ 12,904	$ 13,732	$ 26,400	$ 49,670	[1],[2],[3]	$ 29,021	[1],[2],[3]
Earnings per share:
Basic (in dollars per share)										$ 1.09		$ 0.60
Diluted (in dollars per share)										$ 1.08		$ 0.60
Weighted average shares outstanding:
Basic (in shares)									44,791	45,561	[1]	48,129	[1]
Diluted (in shares)									45,340	46,135	[1]	48,516	[1]
Software licenses
Revenue:
Total revenue									$ 122,552	$ 99,800	[1]	$ 113,643	[1]
Costs of revenue									4,894	4,769	[1]	5,752	[1]
Maintenance and services
Revenue:
Total revenue									290,746	279,181	[1]	275,511	[1]
Costs of revenue									$ 44,463	39,470	[1]	43,299	[1]
As Reported
Revenue:
Total revenue										397,165		397,572
Costs of revenue										66,973		69,159
Gross profit										330,192		328,413
Total operating expenses										244,194		257,799
Income from operations										85,998		70,614
Other expense, net										(7,018)		(5,027)
Income before income taxes										78,980		65,587
Provision for income taxes										15,489		28,170
Net income										$ 63,491		$ 37,417
Earnings per share:
Basic (in dollars per share)										$ 1.39		$ 0.78
Diluted (in dollars per share)										$ 1.38		$ 0.77
As Reported | Software licenses
Revenue:
Total revenue										$ 122,137		$ 124,406
As Reported | Maintenance and services
Revenue:
Total revenue										275,028		273,166
Accounting Standards Update 2014-09 | Adjustments
Revenue:
Total revenue										(18,184)		(8,418)
Costs of revenue										0		0
Gross profit										(18,184)		(8,418)
Total operating expenses										0		4,706
Income from operations										(18,184)		(13,124)
Other expense, net										0		0
Income before income taxes										(18,184)		(13,124)
Provision for income taxes										(4,363)		(4,728)
Net income										$ (13,821)		$ (8,396)
Earnings per share:
Basic (in dollars per share)										$ (0.30)		$ (0.18)
Diluted (in dollars per share)										$ (0.30)		$ (0.17)
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										$ (22,337)		$ (10,763)
Accounting Standards Update 2014-09 | Adjustments | Maintenance and services
Revenue:
Total revenue										$ 4,153		$ 2,345

[1] The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.

[2] The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.

[3] The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.