Note 12 - Property, Equipment and Leasehold Improvements - Property, Equipment and Leasehold Improvements (Details) - USD ($) $ in Thousands	Aug. 31, 2018	Aug. 31, 2017
Property, equipment and leasehold improvements	$ 345,801	$ 294,487
Less accumulated depreciation and amortization	(245,256)	(194,033)
Property, equipment and leasehold improvements, net	100,545	100,454
Leasehold Improvements [Member]
Property, equipment and leasehold improvements	119,479	113,760
Computer Equipment [Member]
Property, equipment and leasehold improvements	181,623	138,195
Furniture and Fixtures [Member]
Property, equipment and leasehold improvements	$ 44,699	$ 42,532

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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