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		7,920		6,838			13,601
Deferred:
Federal		1,302		7,579			1,791
State		176		15			1,284
Foreign		2,682		(1,703	)		(5,840	)
Total income tax provision	$	34,825	$	17,820		$	16,019

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			1.4			2.0
Foreign taxes and foreign losses with tax benefit			(0.6	)		(13.3	)		(19.1	)
Change in U.S. valuation allowance			0.4			(0.2	)		(0.3	)
Research and development credits			(4.3	)		(3.5	)		(2.1	)
Section 199 benefit (1)			(2.7	)		—			—
Stock-based compensation expense (1)			6.7			—			—
Other			2.1			(3.7	)		3.5
			40.6	%		15.7	%		19.0	%

(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		13,162			13,423
Total gross deferred tax assets		107,341			92,173
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		39,206			55,254
Less current portion		(21,647	)		(8,269	)
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		31,157		57,686		69,242
Total	$	85,775	$	113,542	$	84,195

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