Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended
	Oct. 31, 2016	Jul. 31, 2016
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment	$ 0
Goodwill	228,700,000	$ 229,300,000
Intangible assets, net	41,800,000	$ 38,500,000
Amortization of existing intangible assets	1,500,000
Foreign exchange translation decrease of intangible assets	100,000
Partmo
Indefinite-lived Intangible Assets [Line Items]
Amount of finite-lived intangibles acquired	$ 4,900,000
Acquired finite-lived intangible assets, weighted average useful life	20 years