Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Components Of Income Before Income Taxes

Income before income taxes includes the following components:

	Year Ended December 31,
(in thousands)	2015		2014		2013
Domestic	$	325,097	$	291,042	$	272,569
Foreign	31,668		57,097		49,920
Total	$	356,765	$	348,139	$	322,489

Components Of Provision For Income Taxes

The provision for income taxes is composed of the following:

	Year Ended December 31,
(in thousands)	2015			2014			2013
Current:
Federal	$	93,853		$	80,620		$	69,268
State	7,733			7,192			7,197
Foreign	17,854			24,495			24,722
Deferred:
Federal	(14,472		)	(18,536		)	(23,438		)
State	(1,987		)	(1,915		)	(2,187		)
Foreign	1,263			1,593			1,600
Total	$	104,244		$	93,449		$	77,162

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,
	2015		2014		2013
Federal statutory tax rate	35.0	%	35.0	%	35.0	%
State income taxes, net of federal benefit	1.1		1.2		1.1
Stock-based compensation	—		0.6		0.9
Net benefit of unrepatriated earnings	—		(0.3	)	(0.9	)
Uncertain tax positions	(0.4	)	(0.9	)	(3.7	)
Research and development credits	(1.1	)	(1.1	)	(2.0	)
Benefit from restructuring activities	(2.7	)	(4.1	)	(2.8	)
Domestic production activity benefit	(3.1	)	(3.5	)	(3.3	)
Other	0.4		(0.1	)	(0.4	)
	29.2	%	26.8	%	23.9	%

Components Of Deferred Tax Assets And Liabilities

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

	December 31,
(in thousands)	2015			2014
Deferred tax assets:
Net operating loss carryforwards	$	40,939		$	42,060
Stock-based compensation	23,258			23,331
Employee benefits	17,044			20,034
Uncertain tax positions	10,233			8,545
Deferred revenue	8,603			6,533
Research and development credits	3,562			4,349
Allowance for doubtful accounts	1,888			1,806
Other	3,240			2,877
Valuation allowance	(603		)	(130		)
	108,164			109,405
Deferred tax liabilities:
Other intangible assets	(73,933		)	(92,703		)
Property and equipment	(3,426		)	(4,652		)
	(77,359		)	(97,355		)
Net deferred tax assets	$	30,805		$	12,050

Reconciliation Of Unrecognized Tax Benefits

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

	Year Ended December 31,
(in thousands)	2015			2014			2013
Unrecognized tax benefit as of January 1	$	16,342		$	19,590		$	37,203
Gross increases—tax positions in prior period	64			488			320
Gross decreases—tax positions in prior period	(850		)	(3,715		)	(18,058		)
Gross increases—tax positions in current period	4,064			2,513			2,036
Reductions due to a lapse of the applicable statute of limitations	(2,808		)	(1,924		)	(1,734		)
Changes due to currency fluctuation	(653		)	(610		)	20
Settlements	(92		)	—			(197		)
Unrecognized tax benefit as of December 31	$	16,067		$	16,342		$	19,590