CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 71,378	$ 59,953	$ 47,953
Other comprehensive income (loss):
Foreign currency translation	1,895	(13,019)	(7,064)
Reclassification adjustment to loss on sale of business for foreign currency translation gain included in net income during the year	0	0	(1,264)
Total other comprehensive income (loss)	1,895	(13,019)	(8,328)
Comprehensive income	$ 73,273	$ 46,934	$ 39,625