Income Taxes (Tables)

12 Months Ended

Nov. 30, 2011

Income Taxes [Abstract]

Income Before Provision For Income Taxes

	Year Ended November 30,
	2011		2010		2009
United States	$	51,159	$	84,671	$	78,928
International		98,776		26,201		10,689
	$	149,935	$	110,872	$	89,617

Significant Components Of Provision For (Benefit From) Income Taxes

	Year Ended November 30,
	2011			2010			2009
Federal:
Current	$	14,619		$	25,140		$	23,547
Deferred		2,364			(1,353	)		(992	)
		16,983			23,787			22,555
State:
Current		1,925			3,425			2,934
Deferred		1,341			(1,155	)		(1,050	)
		3,266			2,270			1,884
Foreign:
Current		19,490			12,314			13,246
Deferred		(2,439	)		(5,970	)		(10,588	)
		17,051			6,344			2,658
Provision for income taxes	$	37,300		$	32,401		$	27,097

Provision For Income Taxes At Rates Other Than United States Federal Statutory Tax Rate

	Year Ended November 30,
	2011			2010			2009
U.S. Federal statutory rate		35.0	%		35.0	%		35.0	%
State taxes		1.8			2.1			3.2
Research and development credits		(2.7	)		(0.3	)		(1.9	)
Stock option compensation		1.6			0.5			1.1
Foreign income taxed at different rate		(5.9	)		(7.9	)		(6.6	)
Change in valuation allowance		(2.5	)		0.0			0.8
Domestic manufacturing incentives		(1.1	)		—			—
Other		(1.3	)		(0.2	)		(1.4	)
Effective tax rate		24.9	%		29.2	%		30.2	%

Components Of Deferred Tax Assets (Liabilities)

	November 30,
	2011			2010
Deferred tax assets:
Net operating loss carryforwards	$	46,375		$	38,822
Reserves, accruals and foreign related items		19,409			26,319
Credit carryforwards		14,930			18,123
Depreciation and amortization		12,760			18,424
Unrealized losses on investments		5,043			4,905
Deferred revenue		6,231			8,337
Translation gains/losses		6,772			6,030
Stock compensation expense		19,727			13,629
Other		1,374			3,170
		132,621			137,759
Deferred tax liabilities:
Intangible assets		(28,390	)		(34,790	)
Unbilled receivable		(4,407	)		(720	)
Other		(2,453	)		(745	)
		(35,250	)		(36,255	)
Net deferred tax assets before valuation allowance		97,371			101,504
Valuation allowance		(5,592	)		(8,051	)
Net deferred tax assets	$	91,779		$	93,453

Reconciliation Of Unrecognized Tax Benefits

	November 30,
	2011			2010
Gross unrecognized tax benefits balance at beginning of year	$	35,782		$	38,516
Increases for tax positions of current fiscal year		8,449			1,267
Increases for tax positions of prior fiscal years		964			413
Decreases for tax positions of prior fiscal years		(2	)		(493	)
Lapse of statutes of limitation		(1,574	)		(3,921	)
Gross unrecognized tax benefits at end of year		43,619			35,782
Interest and penalties		761			872
Total unrecognized tax benefits balance at end of year	$	44,380		$	36,654