Business Combinations (Schedule Of Pro Forma Adjustments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Amortization of intangible assets			$ 895	$ 769
Interest expense	$ 218	$ 120	326	232
Income tax benefit (expense)	$ 213	305	518	604
Acquisition-related Costs [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Amortization of intangible assets		228	194	456
Acquisition-related professional fees			(121)
Interest expense		82	82	164
Income tax benefit (expense)		21	121	22
Total adjustments		$ 331	$ 276	$ 642