Selected Quarterly Financial Data (unaudited) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Nov. 30, 2017	Aug. 31, 2017	May 31, 2017	Feb. 28, 2017	Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Feb. 29, 2016	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 116,079,000	$ 97,310,000	$ 93,213,000	$ 90,970,000	$ 117,724,000	$ 102,018,000	$ 96,118,000	$ 89,481,000	$ 397,572,000	$ 405,341,000	$ 377,554,000
Gross profit	98,120,000	79,235,000	75,846,000	75,212,000	101,186,000	84,829,000	79,883,000	73,731,000	328,413,000	339,629,000	313,812,000
Income (loss) from operations	28,809,000	20,299,000	20,284,000	1,222,000	(62,364,000)	13,606,000	12,344,000	6,705,000	70,614,000	(29,709,000)	14,754,000
Net income (loss)	$ 16,429,000	$ 11,172,000	$ 10,341,000	$ (525,000)	$ (73,793,000)	$ 7,576,000	$ 7,275,000	$ 3,216,000	$ 37,417,000	$ (55,726,000)	$ (8,801,000)
Basic earnings (loss) per share (in dollars per share)	$ 0.35	$ 0.23	$ 0.21	$ (0.01)	$ (1.52)	$ 0.16	$ 0.15	$ 0.06	$ 0.78	$ (1.13)	$ (0.17)
Diluted earnings (loss) per share (in dollars per share)	$ 0.34	$ 0.23	$ 0.21	$ (0.01)	$ (1.52)	$ 0.15	$ 0.14	$ 0.06	$ 0.77	$ (1.13)	$ (0.17)
Goodwill [Line Items]
Impairment of goodwill and intangible assets									$ 0	$ 92,000,000	$ 0
Application Development and Deployment [Member]
Goodwill [Line Items]
Impairment of goodwill and intangible assets	$ 92,000,000									$ 92,000,000