Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3,216	$ (971)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(1,091)	(5,478)
Unrealized gains (losses) on investments, net of tax of $23 and $0 for 2016 and 2015, respectively	40	(2)
Total other comprehensive loss, net of tax	(1,051)	(5,480)
Comprehensive income (loss)	$ 2,165	$ (6,451)