Intangible Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 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:

	September 30, 2019									December 31, 2018
In thousands	Gross			Accumulated (Amortization) Accretion			Net			Gross			Accumulated (Amortization) Accretion			Net
Intangible Assets
Core-developed technology	$	500,624		$	(443,313	)	$	57,311		$	507,100		$	(429,955	)	$	77,145
Customer contracts and relationships	375,094			(236,824		)	138,270			379,614			(212,538		)	167,076
Trademarks and trade names	77,848			(71,803		)	6,045			78,746			(69,879		)	8,867
Other	12,020			(11,325		)	695			12,600			(11,205		)	1,395
Total intangible assets subject to amortization	965,586			(763,265		)	202,321			978,060			(723,577		)	254,483
In-process research and development	—			—			—			3,100			—			3,100
Total intangible assets	$	965,586		$	(763,265	)	$	202,321		$	981,160		$	(723,577	)	$	257,583
Intangible Liabilities
Customer contracts and relationships	$	(23,900	)	$	11,392		$	(12,508	)	$	(23,900	)	$	5,217		$	(18,683	)

Summary of Intangible Asset Account Activity

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

	Nine Months Ended September 30,
In thousands	2019			2018
Beginning balance, intangible assets, gross	$	981,160		$	769,851
Intangible assets acquired	—			242,039
Effect of change in exchange rates	(15,574		)	(15,352		)
Ending balance, intangible assets, gross	$	965,586		$	996,538
Beginning balance, intangible liabilities, gross	$	(23,900	)	$	—
Intangible liabilities assumed	—			(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 September 30, 2019)	$	18,162	$	(2,058	)	$	16,104
2020	52,850		(8,028		)	44,822
2021	37,547		(1,963		)	35,584
2022	27,212		(459		)	26,753
2023	19,678		—			19,678
Thereafter	46,872		—			46,872
Total intangible assets subject to amortization (accretion)	$	202,321	$	(12,508	)	$	189,813