Schedule of Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of Finite-Lived Intangible Assets

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

	December 31, 2019						December 31, 2018
In thousands	Gross Assets		Accumulated (Amortization) Accretion		Net		Gross Assets		Accumulated (Amortization) Accretion		Net
Intangible Assets
Core-developed technology	$	507,669	$	(458,109)	$	49,560	$	507,100	$	(429,955)	$	77,145
Customer contracts and relationships	381,288		(251,509)		129,779		379,614		(212,538)		167,076
Trademarks and trade names	78,837		(73,732)		5,105		78,746		(69,879)		8,867
Other	12,020		(11,367)		653		12,600		(11,205)		1,395
Total intangible assets subject to amortization	979,814		(794,717)		185,097		978,060		(723,577)		254,483
In-process research and development	—				—		3,100				3,100
Total intangible assets	$	979,814	$	(794,717)	$	185,097	$	981,160	$	(723,577)	$	257,583
Intangible Liabilities
Customer contracts and relationships	$	(23,900)	$	13,450	$	(10,450)	$	(23,900)	$	5,217	$	(18,683)

Summary Of Intangible Asset Account Activity

A summary of the intangible assets and liabilities account activity is as follows:

	Year Ended December 31,
In thousands	2019		2018
Beginning balance, intangible assets, gross	$	981,160	$	769,851
Intangible assets acquired	—		242,039
Effect of change in exchange rates	(1,346)		(30,730)
Ending balance, intangible assets, gross	$	979,814	$	981,160
Beginning balance, intangible liabilities, gross	$	(23,900)	$	—
Intangible liabilities acquired	—		(23,900)
Effect of change in exchange rates	—		—
Ending balance, intangible liabilities, gross	$	(23,900)	$	(23,900)

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Estimated future annual amortization (accretion) is as follows:

Year Ending December 31,	Amortization		Accretion		Estimated Annual Amortization, net
In thousands
2020	$	53,028	$	(8,028)	$	45,000
2021	37,705		(1,963)		35,742
2022	27,346		(459)		26,887
2023	19,785		—		19,785
2024	15,612		—		15,612
Thereafter	31,621		—		31,621
Total intangible assets subject to amortization	$	185,097	$	(10,450)	$	174,647

Finite-lived Intangible Assets Amortization Expense

Amortization Expense	Year Ended December 31,
In thousands	2019		2018		2017
Amortization expense	$	64,286	$	71,713	$	20,785