Intangible Assets (Text Block)

3 Months Ended

Mar. 31, 2017

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible Assets [Text Block]

Intangible Assets

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

	March 31, 2017							December 31, 2016
	Gross Assets		Accumulated Amortization			Net		Gross Assets		Accumulated Amortization			Net
	(in thousands)
Core-developed technology	$	381,788	$	(365,766	)	$	16,022	$	372,568	$	(354,878	)	$	17,690
Customer contracts and relationships	230,382		(176,960		)	53,422		224,467		(170,056		)	54,411
Trademarks and trade names	62,817		(62,802		)	15		61,785		(61,766		)	19
Other	11,077		(11,051		)	26		11,076		(11,045		)	31
Total intangible assets	$	686,064	$	(616,579	)	$	69,485	$	669,896	$	(597,745	)	$	72,151

A summary of intangible asset activity is as follows:

	Three Months Ended March 31,
	2017		2016
	(in thousands)
Beginning balance, intangible assets, gross	$	669,896	$	702,507
Effect of change in exchange rates	16,168		6,474
Ending balance, intangible assets, gross	$	686,064	$	708,981

Estimated future annual amortization expense is as follows:

Year Ending December 31,	Estimated Annual Amortization
	(in thousands)
2017 (amount remaining at March 31, 2017)	$	13,709
2018	12,673
2019	9,935
2020	8,077
2021	7,031
Beyond 2021	18,060
Total intangible assets subject to amortization	$	69,485