Intangible Assets Schedule of Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2015

Acquired Finite-Lived Intangible Assets [Line Items]

Schedule of Intangible Assets by Major Class [Table Text Block]

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

	September 30, 2015							December 31, 2014
	Gross Assets		Accumulated Amortization			Net		Gross Assets		Accumulated Amortization			Net
	(in thousands)
Core-developed technology	$	392,667	$	(357,007	)	$	35,660	$	405,434	$	(359,500	)	$	45,934
Customer contracts and relationships	242,627		(168,552		)	74,075		262,930		(172,755		)	90,175
Trademarks and trade names	64,808		(62,884		)	1,924		68,205		(64,905		)	3,300
Other	11,131		(11,023		)	108		11,579		(11,079		)	500
Total intangible assets	$	711,233	$	(599,466	)	$	111,767	$	748,148	$	(608,239	)	$	139,909

Summary of Intangible Asset Account Activity [Table Text Block]

A summary of intangible asset activity is as follows:

	Nine Months Ended September 30,
	2015			2014
	(in thousands)
Beginning balance, intangible assets, gross	$	748,148		$	804,281
Intangible assets acquired	4,827			1,453
Intangible assets impaired	(497		)	—
Effect of change in exchange rates	(41,245		)	(35,742		)
Ending balance, intangible assets, gross	$	711,233		$	769,992

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]

The following table reflects our preliminary allocation of purchase price for intangible assets acquired on August 26, 2015:

	Fair Value		Weighted Average Useful Life
	(in thousands)		(in years)
Identified intangible assets
Core-developed technology	$	4,378	7.0
Customer contracts and relationships	337		7.0
Trademarks and trade names	56		3.0
Other	56		2.0
Total identified intangible assets subject to amortization	$	4,827	6.9

Schedule of 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 (amount remaining at September 30, 2015)	$	8,189
2016	25,566
2017	19,005
2018	13,271
2019	10,448
Beyond 2019	35,288
Total intangible assets subject to amortization	$	111,767