Note 11 - Property, Equipment and Leasehold Improvements (Details) - Property, Equipment and Leasehold Improvements (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013
Property, Plant and Equipment [Line Items]
Property, Plant, And Equipment	$ 201,713	$ 192,338
Less accumulated depreciation and amortization	(144,072)	(126,967)
Property, equipment and leasehold improvements, net	57,641	65,371
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant, And Equipment	90,487	90,040
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant, And Equipment	81,853	73,320
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant, And Equipment	$ 29,373	$ 28,978