Intangible Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2019

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of Intangible Assets by Major Class

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

	March 31, 2019									December 31, 2018
In thousands	Gross			Accumulated (Amortization) Accretion			Net			Gross			Accumulated (Amortization) Accretion			Net
Intangible Assets
Core-developed technology	$	507,023		$	(436,829	)	$	70,194		$	507,100		$	(429,955	)	$	77,145
Customer contracts and relationships	382,504			(224,312		)	158,192			379,614			(212,538		)	167,076
Trademarks and trade names	79,071			(71,145		)	7,926			78,746			(69,879		)	8,867
Other	12,021			(11,245		)	776			12,600			(11,205		)	1,395
Total intangible assets subject to amortization	980,619			(743,531		)	237,088			978,060			(723,577		)	254,483
In-process research and development	2,900			—			2,900			3,100			—			3,100
Total intangible assets	$	983,519		$	(743,531	)	$	239,988		$	981,160		$	(723,577	)	$	257,583
Intangible Liabilities
Customer contracts and relationships	$	(23,900	)	$	7,275		$	(16,625	)	$	(23,900	)	$	5,217		$	(18,683	)

Summary of Intangible Asset Account Activity

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

	Three Months Ended March 31,
In thousands	2019			2018
Beginning balance, intangible assets, gross	$	981,160		$	769,851
Intangible assets acquired	—			240,600
Effect of change in exchange rates	2,359			22,979
Ending balance, intangible assets, gross	$	983,519		$	1,033,430
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 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
2019 (amount remaining at March 31, 2019)	$	54,492	$	(6,175	)	$	48,317
2020	52,891		(8,028		)	44,863
2021	37,209		(1,963		)	35,246
2022	27,015		(459		)	26,556
2023	19,366		—			19,366
Beyond 2023	46,115		—			46,115
Total intangible assets subject to amortization (accretion)	$	237,088	$	(16,625	)	$	220,463