Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 15,403	$ 10,341	$ 28,315	$ 9,816
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(9,018)	4,143	(5,187)	5,371
Unrealized (losses) gains on investments, net of tax provision of $0 and $39 for the second quarter and first six months of 2018, respectively and $5 and $45 for the second quarter and first six months of 2017, respectively	(1)	7	(28)	78
Total other comprehensive (loss) income, net of tax	(9,019)	4,150	(5,215)	5,449
Comprehensive income	$ 6,384	$ 14,491	$ 23,100	$ 15,265