Property and Equipment, Net (Details) - USD ($) $ in Thousands	Jul. 31, 2018	Jul. 31, 2017
Property, Plant and Equipment [Line Items]
Less: accumulated depreciation	$ (95,540)	$ (86,123)
Total property and equipment, net	111,417	88,338
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	50,162	46,921
Furniture, equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	121,248	114,735
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,544	7,858
Construction in process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 26,003	$ 4,947