Income Taxes (Tables)

12 Months Ended

Nov. 30, 2011

Income Taxes [Abstract]

Components Of Pretax Income

(In thousands)
Year Ended November 30,	2011		2010		2009
U.S.	$	69,199	$	54,566	$	32,279
Foreign		18,505		16,862		18,901
Total	$	87,704	$	71,428	$	51,180

Provisions For Income Taxes

(In thousands)
Year Ended November 30,	2011		2010			2009
Current:
Federal	$	19,961	$	11,536		$	10,116
State		1,982		1,925			1,383
Foreign		5,131		5,392			7,293
Total current		27,074		18,853			18,792
Deferred:
Federal		1,624		4,817			1,948
State		71		48			(36	)
Foreign		174		(861	)		(2,279	)
Total deferred		1,869		4,004			(367	)
Total	$	28,943	$	22,857		$	18,425

Summary Of Deferred Taxes

(In thousands)
November 30,	2011			2010
Deferred tax assets:
Accounts receivable	$	1,230		$	598
Other current assets		780			815
Capitalized research costs		1,360			2,697
Accrued compensation		3,258			1,369
Accrued liabilities and other		9,469			10,722
Deferred revenue		1,540			2,743
Stock-based compensation		8,908			8,667
Tax credit and loss carryforwards		48,503			50,334
Gross deferred tax assets		75,048			77,945
Valuation allowance		(23,352	)		(21,566	)
Total net deferred tax assets		51,696			56,379
Deferred tax liabilities:
Goodwill		(10,629	)		(9,481	)
Depreciation and amortization		(3,795	)		(5,783	)
Total deferred tax liabilities		(14,424	)		(15,264	)
Total	$	37,272		$	41,115

Reconciliation Of The U.S. Federal Statutory Rate To The Effective Tax Rate

		$ 3,28100			$ 3,28100			$ 3,28100
Year Ended November 30,	2011			2010			2009
Tax at U.S. Federal statutory rate		35.0	%		35.0	%		35.0	%
Foreign rate differences		(0.1	)		(2.8	)		(1.7	)
State income taxes, net		1.7			1.8			1.7
Research credits		(3.4	)		(0.2	)		(3.7	)
Domestic production activities deduction		(2.1	)		(0.8	)		(0.8	)
Tax-exempt interest		(0.2	)		(0.2	)		(0.5	)
Nondeductible stock-based compensation		2.6			2.3			5.2
Nonrecurring benefit from change in estimate from earnings and profits		—			(3.5	)		—
Other		(0.5	)		0.4			0.8
Total		33.0	%		32.0	%		36.0	%

Reconciliation Of Unrecognized Tax Benefits

		$ 3,28100			$ 3,28100			$ 3,28100
(In thousands)
Year Ended November 30,	2011			2010			2009
Balance, beginning of year	$	1,219		$	3,281		$	4,784
Tax positions related to current year		13			—			—
Settlements with tax authorities		—			(1,736	)		(1,323	)
Tax positions acquired		—			200			—
Lapses due to expiration of the statute of limitations		(108	)		(526	)		(180	)
Balance, end of year	$	1,124		$	1,219		$	3,281