Intangible Assets Schedule of Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of Intangible Assets [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The gross carrying amount and accumulated amortization of our intangible assets, other than goodwill, are as follows:

	December 31, 2014							December 31, 2013
	Gross Assets		Accumulated Amortization			Net		Gross Assets		Accumulated Amortization			Net
	(in thousands)
Core-developed technology	$	405,434	$	(359,500	)	$	45,934	$	428,890	$	(356,017	)	$	72,873
Customer contracts and relationships	262,930		(172,755		)	90,175		291,185		(173,952		)	117,233
Trademarks and trade names	68,205		(64,905		)	3,300		73,117		(67,449		)	5,668
Other	11,579		(11,079		)	500		11,089		(11,023		)	66
Total intangible assets subject to amortization	748,148		(608,239		)	139,909		804,281		(608,441		)	195,840

SummaryOfIntangibleAssetAccountActivity [Table Text Block]

A summary of the intangible asset account activity is as follows:

	Year Ended December 31,
	2014			2013
	(in thousands)
Beginning balance, intangible assets, gross	$	804,281		$	802,540
Intangible assets acquired	1,453			(1,500		)
Effect of change in exchange rates	(57,586		)	3,241
Ending balance, intangible assets, gross	$	748,148		$	804,281

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

A summary of intangible asset amortization expense is as follows:

Amortization expense	Year Ended December 31,
	2014		2013		2012
	(in thousands)
Amortization expense	$	43,704	$	42,019	$	47,810

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Estimated future annual amortization expense is as follows:

Years ending December 31,	Estimated Annual Amortization
	(in thousands)
2015	$	33,562
2016	26,522
2017	19,485
2018	13,571
2019	10,501
Beyond 2019	36,268
Total intangible assets subject to amortization	$	139,909