Other Intangible Assets (Schedule Of Amortizable Intangible Assets) (Details) - USD ($) $ in Thousands	9 Months Ended
	Apr. 30, 2017	Apr. 30, 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	(7,994)	(6,188)	(6,576)	(5,034)
Amortizable Intangible Assets, Net Value	9,702	8,275	7,890	10,116
Activity, Cost Basis	3,230	(687)
Activity, Accumulated Amortization	(1,418)	(1,154)
Activity, Net Value	$ 1,812	$ (1,841)
Weighted average remaining useful life	11 years 2 months 12 days	11 years 3 months 4 days
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	(6,620)	(5,271)	(5,558)	(4,418)
Amortizable Intangible Assets, Net Value	7,647	6,456	6,169	7,529
Activity, Cost Basis	2,540	(220)
Activity, Accumulated Amortization	(1,062)	(853)
Activity, Net Value	$ 1,478	$ (1,073)
Weighted average remaining useful life	11 years 8 months 9 days	11 years 11 months 23 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	(1,374)	(917)	(1,018)	(616)
Amortizable Intangible Assets, Net Value	2,055	1,819	$ 1,721	$ 2,587
Activity, Cost Basis	690	(467)
Activity, Accumulated Amortization	(356)	(301)
Activity, Net Value	$ 334	$ (768)
Weighted average remaining useful life	9 years 4 months 24 days	8 years 8 months 23 days