CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 59,953,000	$ 47,953,000	$ 43,265,000
Other comprehensive loss:
Foreign currency translation	(13,019,000)	(7,064,000)	(1,528,000)
Reclassification adjustment to loss on sale of business for foreign currency translation gain included in net income during the period		(1,264,000)
Unrealized holding losses on interest rate swaps arising during the period, net of tax			(30,000)
Reclassification adjustments to interest expense for losses on interest rate swaps included in net income during the period, net of tax			60,000
Reclassification adjustment to interest expense for ineffective hedge on interest rate swap included in net income during the period, net of tax			73,000
Total other comprehensive loss	(13,019,000)	(8,328,000)	(1,425,000)
Comprehensive income	$ 46,934,000	$ 39,625,000	$ 41,840,000