Other Intangible Assets (Schedule Of Amortizable Intangible Assets) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jul. 31, 2016	Jul. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortizable Intangible Assets, Cost Basis	$ 17,696	$ 14,463	$ 14,466	$ 15,150
Amortizable Intangible Assets, Accumulated Amortization	(7,471)	(5,803)	(6,576)	(5,034)
Amortizable Intangible Assets, Net Value	10,225	8,660	7,890	10,116
Activity, Cost Basis	3,230	(687)
Activity, Accumulated Amortization	(895)	(769)
Activity, Net Value	$ 2,335	$ (1,456)
Weighted average remaining useful life	11 years 6 months 18 days	11 years 5 months 1 day
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable Intangible Assets, Cost Basis	$ 14,267	$ 11,727	11,727	11,947
Amortizable Intangible Assets, Accumulated Amortization	(5,934)	(4,983)	(5,558)	(4,418)
Amortizable Intangible Assets, Net Value	8,333	6,744	6,169	7,529
Activity, Cost Basis	2,540	(220)
Activity, Accumulated Amortization	(376)	(565)
Activity, Net Value	$ 2,164	$ (785)
Weighted average remaining useful life	11 years 11 months 1 day	12 years 1 month 17 days
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable Intangible Assets, Cost Basis	$ 3,429	$ 2,736	2,739	3,203
Amortizable Intangible Assets, Accumulated Amortization	(1,537)	(820)	(1,018)	(616)
Amortizable Intangible Assets, Net Value	1,892	1,916	$ 1,721	$ 2,587
Activity, Cost Basis	690	(467)
Activity, Accumulated Amortization	(519)	(204)
Activity, Net Value	$ 171	$ (671)
Weighted average remaining useful life	9 years 11 months 5 days	8 years 11 months 1 day