Intangible Assets Schedule of Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2015

Schedule of Intangible Assets [Abstract]

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:

	March 31, 2015							December 31, 2014
	Gross Assets		Accumulated Amortization			Net		Gross Assets		Accumulated Amortization			Net
	(in thousands)
Core-developed technology	$	387,286	$	(347,529	)	$	39,757	$	405,434	$	(359,500	)	$	45,934
Customer contracts and relationships	242,624		(162,637		)	79,987		262,930		(172,755		)	90,175
Trademarks and trade names	64,624		(61,994		)	2,630		68,205		(64,905		)	3,300
Other	11,079		(11,022		)	57		11,579		(11,079		)	500
Total intangible assets	$	705,613	$	(583,182	)	$	122,431	$	748,148	$	(608,239	)	$	139,909

Summary of Intangible Asset Account Activity [Table Text Block]

A summary of intangible asset activity is as follows:

	Three Months Ended March 31,
	2015			2014
	(in thousands)
Beginning balance, intangible assets, gross	$	748,148		$	804,281
Intangible assets impaired	(497		)	—
Effect of change in exchange rates	(42,038		)	(2,073		)
Ending balance, intangible assets, gross	$	705,613		$	802,208

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 March 31, 2015)	$	23,956
2016	24,768
2017	18,249
2018	12,558
2019	9,757
Beyond 2019	33,143
Total intangible assets subject to amortization	$	122,431