CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Net income (loss)	$ 65,089	$ (2,906)	$ 59,852	$ (11,449)
Other comprehensive income (loss):
Foreign currency translation adjustment	3,654	(734)	3,926	(2,003)
Net unrealized holding gain (loss) on securities, net of tax	29	(10)	16
Pension liability adjustments, net of tax		353	26	750
Other comprehensive income (loss)	3,683	(391)	3,968	(1,253)
Comprehensive income (loss)	$ 68,772	$ (3,297)	$ 63,820	$ (12,702)