Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Tax Disclosure [Abstract]

Components Of Income Before Income Taxes

Income before income taxes includes the following components:

	Year Ended December 31,
(in thousands)	2012		2011		2010
Domestic	$	234,497	$	205,966	$	162,921
Foreign	59,050		58,892		53,473
Total	$	293,547	$	264,858	$	216,394

Components Of Provision For Income Taxes

The provision for income taxes is composed of the following:

	Year Ended December 31,
(in thousands)	2012			2011			2010
Current:
Federal	$	79,028		$	57,423		$	62,350
State	7,886			5,770			5,589
Foreign	22,046			24,011			21,964
Deferred:
Federal	(21,026		)	(11,768		)	(15,173		)
State	(3,913		)	(1,314		)	(2,102		)
Foreign	6,043			10,061			(9,366		)
Total	$	90,064		$	84,183		$	63,262

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

The reconciliation of the U.S. federal statutory tax rate to the consolidated effective tax rate is as follows:

	Year Ended December 31,
	2012		2011		2010
Federal statutory tax rate	35.0	%	35.0	%	35.0	%
State income taxes, net of federal benefit	1.2		1.1		0.7
Stock-based compensation	1.0		1.0		1.4
Changes in tax rates	0.8		2.2		—
Net tax (benefit) of unrepatriated earnings	0.7		—		(0.3	)
Uncertain tax positions	0.3		0.2		(0.8	)
Benefit from restructuring activities	(3.1	)	(3.5	)	(1.0	)
Domestic production activity benefit	(3.3	)	(2.9	)	(2.8	)
Foreign rate differential	(1.9	)	(1.1	)	(0.7	)
Research and experimentation credits	(0.1	)	(0.9	)	(0.7	)
Adjustments of prior year taxes	(1.3	)	(0.3	)	(1.1	)
Other	1.4		1.0		(0.5	)
	30.7	%	31.8	%	29.2	%

Components Of Deferred Tax Assets And Liabilities

The components of deferred tax assets and liabilities are as follows:

	December 31,
(in thousands)	2012			2011
Deferred tax assets:
Net operating loss carryforwards	$	26,228		$	18,624
Employee benefits	17,670			16,697
Stock-based compensation	16,092			11,888
Foreign tax credits	558			7,219
Other accruals not currently deductible	1,207			6,090
Research and development credits	2,254			4,542
Uncertain tax positions	7,790			3,145
Deferred revenue	5,139			3,096
Allowance for doubtful accounts	1,661			1,259
Other	2,227			1,241
Valuation allowance	(14		)	(8		)
	80,812			73,793
Deferred tax liabilities:
Other intangible assets	(128,671		)	(141,949		)
Property and equipment	(5,838		)	(6,529		)
Unremitted foreign earnings	(2,204		)	(140		)
	(136,713		)	(148,618		)
Net deferred tax liabilities	$	(55,901	)	$	(74,825	)

Reconciliation Of Unrecognized Tax Benefits

The following is a reconciliation of the total amounts of unrecognized tax benefits:

	Year Ended December 31,
(in thousands)	2012			2011			2010
Unrecognized tax benefit as of January 1	$	31,582		$	19,993		$	10,041
Acquired unrecognized tax benefit	3,845			5,813			—
Gross increases—tax positions in prior period	2,048			6,814			177
Gross decreases—tax positions in prior period	(2,167		)	(2,697		)	(2,415		)
Gross increases—tax positions in current period	2,660			2,297			13,001
Reductions due to a lapse of the applicable statute of limitations	(1,314		)	(190		)	(674		)
Changes due to currency fluctuation	625			(448		)	(84		)
Settlements	(76		)	—			(53		)
Unrecognized tax benefit as of December 31	$	37,203		$	31,582		$	19,993