CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 39,239,000	$ 31,337,000	$ 20,425,000
Other comprehensive income (loss):
Foreign currency translation, net of tax	2,695,000	(898,000)	1,238,000
Unrealized holding losses on interest rate swaps arising during the year, net of tax	(32,000)	(210,000)
Reclassification adjustments to interest expense for losses on interest rate swaps included in net income during the year, net of tax	139,000
Total other comprehensive income (loss), net of tax	2,802,000	(1,108,000)	1,238,000
Comprehensive income	$ 42,041,000	$ 30,229,000	$ 21,663,000