Note 15 - Income Taxes (Tables)

6 Months Ended

Feb. 28, 2015

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	Three Months Ended February 28,					Six Months Ended February 28,
	2015		2014			2015			2014
U.S. operations	$	64,881	$	62,429		$	130,839		$	122,688
Non-U.S. operations		16,301		12,969			31,033			27,792
Income before income taxes	$	81,182	$	75,398		$	161,872		$	150,480
U.S. operations	$	15,157	$	20,275		$	40,817		$	39,929
Non-U.S. operations		4,427		2,697			3,597			5,947
Total provision for income taxes	$	19,584	$	22,972		$	44,414		$	45,876
Effective tax rate		24.1%*		30.5	%		27.4	%		30.5	%

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Six Months Ended February 28,
	2015			2014
Current
U.S. Federal	$	34,492		$	38,630
U.S. state and local		2,601			2,573
Non-U.S.		5,186			6,008
Total current taxes	$	42,279		$	47,211
Deferred
U.S. Federal	$	3,561		$	(1,205	)
U.S. state and local		163			(69	)
Non-U.S.		(1,589	)		(61	)
Total deferred taxes	$	2,135		$	(1,335	)
Total provision for income taxes	$	44,414		$	45,876

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	Feb 28, 2015			Aug 31, 2014
Deferred tax assets
Current
Receivable reserve	$	592		$	597
Deferred rent		807			1,067
Other		218			177
Net current deferred tax assets	$	1,617		$	1,841
Non-current
Depreciation on property, equipment and leasehold improvements	$	9,657		$	9,831
Deferred rent		3,459			3,572
Stock-based compensation		18,319			18,160
Purchased intangible assets, including acquired technology		(16,416	)		(10,750	)
Other		1,763			1,564
Net non-current deferred tax assets	$	16,782		$	22,377
Total deferred tax assets	$	18,399		$	24,218

	Feb 28, 2015			Aug 31, 2014
Deferred tax liabilities (current)
Other	$	1,047		$	0
Net current deferred tax liabilities	$	1,047		$	0
Deferred tax liabilities (non-current)
Purchased intangible assets, including acquired technology	$	1,992		$	3,478
Stock-based compensation		0			(860	)
Depreciation on property, equipment and leasehold improvements		(182	)		0
Other		287			303
Net non-current deferred tax liabilities	$	2,097		$	2,921
Total deferred tax liabilities	$	3,144		$	2,921

Summary of Income Tax Contingencies [Table Text Block]

Unrecognized income tax benefits at August 31, 2014	$	5,501
Additions based on tax positions related to the current year		524
Additions for tax positions of prior years		882
Unrecognized income tax benefits at February 28, 2015	$	6,907

Summary of Income Tax Examinations [Table Text Block]

Major Tax Jurisdictions	Open Tax Years
U.S.
Federal	2013 through 2015
State (various)	2011 through 2015
Europe
France	2012 through 2015
United Kingdom	2013 through 2015