Intangible Assets and Liabilities

6 Months Ended

Jun. 30, 2020

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible Assets and Liabilities

Intangible Assets and Liabilities

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

	June 30, 2020						December 31, 2019
In thousands	Gross		Accumulated (Amortization) Accretion		Net		Gross		Accumulated (Amortization) Accretion		Net
Intangible Assets
Core-developed technology	$	498,006	$	(459,876)	$	38,130	$	507,669	$	(458,109)	$	49,560
Customer contracts and relationships	365,567		(251,085)		114,482		381,288		(251,509)		129,779
Trademarks and trade names	76,631		(72,677)		3,954		78,837		(73,732)		5,105
Other	12,021		(11,462)		559		12,020		(11,367)		653
Total intangible assets	$	952,225	$	(795,100)	$	157,125	$	979,814	$	(794,717)	$	185,097
Intangible Liabilities
Customer contracts and relationships	$	(23,900)	$	17,465	$	(6,435)	$	(23,900)	$	13,450	$	(10,450)

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

	Six Months Ended June 30,
In thousands	2020		2019
Intangible Assets, gross beginning balance	$	979,814	$	981,160
Intangibles disposed in sale of business	(18,140)		—
Effect of change in exchange rates	(9,449)		4,349
Intangible Assets, gross ending balance	$	952,225	$	985,509
Intangible Liabilities, gross beginning balance	$	(23,900)	$	(23,900)
Effect of change in exchange rates	—		—
Intangible Liabilities, gross ending balance	$	(23,900)	$	(23,900)

On January 5, 2018, we completed our acquisition of Silver Spring Networks, Inc. (SSNI) and acquired intangible assets including in-process research and development (IPR&D), which were completed during 2019 and are now included within core-developed technology. Assumed intangible liabilities reflect the present value of the projected cash outflows for an existing contract where remaining costs are expected to exceed projected revenues.

The disposal of intangible assets was related to the sale of our Latin America business. The net book value of these assets was $0.8 million at the disposal date. Refer to "Note 17: Sale of Business" for additional information on the transaction.

Estimated future annual amortization (accretion) is as follows:

Year Ending December 31,	Amortization		Accretion		Estimated Annual Amortization, net
In thousands
2020 (amount remaining at June 30, 2020)	$	26,345	$	(4,013)	$	22,332
2021	37,479		(1,963)		35,516
2022	27,138		(459)		26,679
2023	19,605		—		19,605
2024	15,469		—		15,469
Thereafter	31,089		—		31,089
Total intangible assets subject to amortization (accretion)	$	157,125	$	(6,435)	$	150,690