Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2016	Aug. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 7,576	$ (4,126)	$ 18,067	$ 670
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(1,332)	(257)	485	(8,411)
Reclassification adjustment for losses included in net income, net of tax of $0 for the third quarter and first nine months of 2016	0	0	256	0
Unrealized gains (losses) on investments, net of tax of $16 for the third quarter and first nine months of 2016 and $0 for the third quarter and first nine months of 2015	30	(17)	27	(52)
Total other comprehensive income (loss), net of tax	(1,302)	(274)	768	(8,463)
Comprehensive income (loss)	$ 6,274	$ (4,400)	$ 18,835	$ (7,793)