Intangible Assets Schedule of Intangible Assets (Tables)

6 Months Ended

Jun. 30, 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:

	June 30, 2015							December 31, 2014
	Gross Assets		Accumulated Amortization			Net		Gross Assets		Accumulated Amortization			Net
	(in thousands)
Core-developed technology	$	392,427	$	(356,567	)	$	35,860	$	405,434	$	(359,500	)	$	45,934
Customer contracts and relationships	249,188		(170,270		)	78,918		262,930		(172,755		)	90,175
Trademarks and trade names	65,709		(63,406		)	2,303		68,205		(64,905		)	3,300
Other	11,080		(11,025		)	55		11,579		(11,079		)	500
Total intangible assets	$	718,404	$	(601,268	)	$	117,136	$	748,148	$	(608,239	)	$	139,909

Summary of Intangible Asset Account Activity [Table Text Block]

A summary of intangible asset activity is as follows:

	Six Months Ended June 30,
	2015			2014
	(in thousands)
Beginning balance, intangible assets, gross	$	748,148		$	804,281
Intangible assets acquired	—			497
Intangible assets impaired	(497		)	—
Effect of change in exchange rates	(29,247		)	(4,075		)
Ending balance, intangible assets, gross	$	718,404		$	800,703

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 June 30, 2015)	$	16,263
2016	25,256
2017	18,607
2018	12,844
2019	9,996
Beyond 2019	34,170
Total intangible assets subject to amortization	$	117,136