Intangible Assets and Liabilities (Tables)

6 Months Ended

Jun. 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:

	June 30, 2019									December 31, 2018
In thousands	Gross			Accumulated (Amortization) Accretion			Net			Gross			Accumulated (Amortization) Accretion			Net
Intangible Assets
Core-developed technology	$	511,967		$	(446,653	)	$	65,314		$	507,100		$	(429,955	)	$	77,145
Customer contracts and relationships	382,397			(233,664		)	148,733			379,614			(212,538		)	167,076
Trademarks and trade names	79,123			(72,138		)	6,985			78,746			(69,879		)	8,867
Other	12,022			(11,287		)	735			12,600			(11,205		)	1,395
Total intangible assets subject to amortization	985,509			(763,742		)	221,767			978,060			(723,577		)	254,483
In-process research and development	—			—			—			3,100			—			3,100
Total intangible assets	$	985,509		$	(763,742	)	$	221,767		$	981,160		$	(723,577	)	$	257,583
Intangible Liabilities
Customer contracts and relationships	$	(23,900	)	$	9,333		$	(14,567	)	$	(23,900	)	$	5,217		$	(18,683	)

Summary of Intangible Asset Account Activity

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

	Six Months Ended June 30,
In thousands	2019			2018
Beginning balance, intangible assets, gross	$	981,160		$	769,851
Intangible assets acquired	—			241,539
Effect of change in exchange rates	4,349			(18,883		)
Ending balance, intangible assets, gross	$	985,509		$	992,507
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 June 30, 2019)	$	36,345	$	(4,117	)	$	32,228
2020	53,126		(8,028		)	45,098
2021	37,772		(1,963		)	35,809
2022	27,407		(459		)	26,948
2023	19,825		—			19,825
Beyond 2023	47,292		—			47,292
Total intangible assets subject to amortization (accretion)	$	221,767	$	(14,567	)	$	207,200