CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 11,185	$ 9,576
Other comprehensive (loss) income:
Foreign currency translation, net of tax	(273)	91
Unrealized holding losses on interest rate swaps arising during the period, net of tax	(21)	(11)
Reclassification adjustments to interest expense for losses on interest rate swaps included in net income during the period, net of tax	30	34
Total other comprehensive (loss) income, net of tax	(264)	114
Comprehensive income	$ 10,921	$ 9,690