Goodwill and Other Intangible Assets Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 65,466	$ 81,460
Finite-Lived Intangible Assets, Accumulated Amortization	(29,343)	(38,872)
Intangible Assets, Net (Excluding Goodwill)	36,123	42,588
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization of Intangible Assets	5,776	$ 6,433	$ 7,113
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	5,166
Finite-Lived Intangible Assets, Amortization Expense, Year Two	5,165
Finite-Lived Intangible Assets, Amortization Expense, Year Three	4,896
Finite-Lived Intangible Assets, Amortization Expense, Year Four	$ 2,025
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	9 years	9 years
Intangible Assets, Gross (Excluding Goodwill)	$ 46,595	$ 61,944
Finite-Lived Intangible Assets, Accumulated Amortization	(29,343)	(38,872)
Intangible Assets, Net (Excluding Goodwill)	17,252	23,072
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	18,871	19,516
Finite-Lived Intangible Assets, Accumulated Amortization	0	0
Intangible Assets, Net (Excluding Goodwill)	$ 18,871	$ 19,516