Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Provision For Income Taxes

	Year Ended December 31
	2011		2010		2009
Current:
Federal	$	17,494	$	2,664	$	3,509
State		5,251		2,427		1,674
Foreign		6,486		4,975		12,871
Deferred:
Federal		1,302		7,579		1,791
State		176		15		1,284
Foreign		2,948		(1,308)		(5,451	)
Total income tax provision	$	33,657	$	16,352	$	15,678

Reconciliations Of U.S. Federal Statutory Rate To The Effective Income Tax Rate

	Year Ended December 31
	2011			2010			2009
Tax provision at U.S. federal statutory rates		35.0	%		35.0	%		35.0	%
State taxes		4.0			1.3			2.0
Foreign taxes and foreign losses with tax benefit		(1.9)			(14.8)			(19.8)
Change in U.S. valuation allowance		0.4			(0.2)			(0.3)
Research and development credits		(4.3)			(3.4)			(2.1)
Section 199 benefit (1)		(2.7)			—			—
Stock-based compensation expense (1)		6.7			—			—
Other		2.1			(3.7)			3.4
		39.3	%		14.2	%		18.2	%

(1) For 2010 and 2009, the impact of Section 199 benefit and stock-based compensation expense were not separately disclosed as these were not material to the overall effective tax rate.

Significant Components Of Deferred Taxes

	December 31
	2011		2010
Deferred tax assets:
Accounts receivable and sales returns reserves	$	255	$	170
Accrued liabilities		7,225		7,353
Deferred revenue		9,972		4,256
Foreign net operating loss carry-forwards		20,267		18,292
U.S. net operating loss carry-forwards		29,315		17,827
Stock compensation		13,146		16,549
Tax credits		13,999		14,303
Other		11,295		11,831
Total gross deferred tax assets		105,474		90,581
Deferred tax liability - Intangibles		(42,243)		(16,518	)
Deferred tax liability - Fixed Assets		(2,724)		(92	)
Valuation allowance		(23,168)		(20,309	)
Net deferred income taxes		37,339		53,662
Less current portion		(19,780)		(6,677)
Non-current portion	$	17,559	$	46,985

Realized Net Tax Benefits From Stock-Based Compensation

Goodwill		(10)
Deferred income tax asset		(11,064)
Income tax provision		4,100
Total	$	(6,974)

Income Before Income Taxes

	Year Ended December 31
	2011		2010		2009
United States	$	54,618	$	55,856	$	14,953
Foreign		31,105		59,063		71,084
Total	$	85,723	$	114,919	$	86,037

Change In Unrecognized Tax Benefits

	Year Ended December 31
	2011		2010		2009
Unrecognized tax benefit at the beginning of the year	$	46,846	$	51,332	$	47,477
Additions from tax positions taken in the current year		11,889		7,366		9,129
Additions from tax positions taken in prior years		4,339		151		7,467
Reductions from tax positions taken in prior years		—		(2,974)		(10,665)
Settlements of tax audits		(1,324)		—		(2,076)
Decrease related to lapse of statute of limitations		(4,816)		(9,029)		—
Unrecognized tax benefit at the end of the year	$	56,934	$	46,846	$	51,332