Intangible Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2020

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


	March 31, 2020										December 31, 2019
In thousands	Gross		Accumulated (Amortization) Accretion		Net		Gross		Accumulated (Amortization) Accretion		Net
Intangible Assets
Core-developed technology	$	501,124	$	(457,310)	$	43,814	$	507,669	$	(458,109)	$	49,560
Customer contracts and relationships	372,983		(251,122)		121,861		381,288		(251,509)		129,779
Trademarks and trade names	77,613		(73,083)		4,530		78,837		(73,732)		5,105
Other	12,019		(11,414)		605		12,020		(11,367)		653


Total intangible assets	$	963,739	$	(792,929)	$	170,810	$	979,814	$	(794,717)	$	185,097

Intangible Liabilities
Customer contracts and relationships	$	(23,900)	$	15,458	$	(8,442)	$	(23,900)	$	13,450	$	(10,450)

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


	Three Months Ended March 31,
In thousands	2020		2019
Beginning balance, intangible assets, gross	$	979,814	$	981,160


Effect of change in exchange rates	(16,075)		2,359
Ending balance, intangible assets, gross	$	963,739	$	983,519

Beginning balance, intangible liabilities, gross	$	(23,900)	$	(23,900)

Effect of change in exchange rates	—		—
Ending balance, intangible liabilities, gross	$	(23,900)	$	(23,900)

Estimated future annual amortization (accretion) is as follows:


Year Ending December 31,	Amortization		Accretion		Estimated Annual Amortization, net
In thousands
2020 (amount remaining at March 31, 2020)	$	39,618	$	(6,020)	$	33,598
2021	37,572		(1,963)		35,609
2022	27,212		(459)		26,753
2023	19,674		—		19,674
2024	15,523		—		15,523
Thereafter	31,211		—		31,211
Total intangible assets subject to amortization (accretion)	$	170,810	$	(8,442)	$	162,368