Intangible Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2018

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, 2018									December 31, 2017
	Gross			Accumulated (Amortization) Accretion			Net			Gross		Accumulated (Amortization) Accretion			Net
	(in thousands)
Intangible Assets
Core-developed technology	$	515,949		$	(427,069	)	$	88,880		$	429,548	$	(399,969	)	$	29,579
Customer contracts and relationships	385,148			(210,735		)	174,413			258,586		(197,582		)	61,004
Trademarks and trade names	79,739			(69,376		)	10,363			70,056		(66,004		)	4,052
Other	12,602			(11,166		)	1,436			11,661		(11,068		)	593
Total intangible assets subject to amortization	$	993,438		$	(718,346	)	$	275,092		$	769,851	$	(674,623	)	$	95,228
In-process research and development	3,100			—			3,100			—		—			—
Total intangible assets	$	996,538		$	(718,346	)	$	278,192		$	769,851	$	(674,623	)	$	95,228
Intangible Liabilities
Customer contracts and relationships	$	(23,900	)	$	3,913		$	(19,987	)	$	—	$	—		$	—

Summary of Intangible Asset Account Activity

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

	Nine Months Ended September 30,
	2018			2017
	(in thousands)
Beginning balance, intangible assets, gross	$	769,851		$	669,896
Intangible assets acquired	242,039			36,500
Effect of change in exchange rates	(15,352		)	57,640
Ending balance, intangible assets, gross	$	996,538		$	764,036
Beginning balance, intangible liabilities, gross	$	—		$	—
Intangible liabilities acquired	(23,900		)	—
Effect of change in exchange rates	—			—
Ending balance, intangible liabilities, gross	$	(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)
2018 (amount remaining at September 30, 2018)	$	19,547	$	(1,304	)	$	18,243
2019	72,681		(8,233		)	64,448
2020	52,727		(8,028		)	44,699
2021	37,314		(1,963		)	35,351
2022	27,160		(459		)	26,701
Beyond 2022	65,663		—			65,663
Total intangible assets subject to amortization (accretion)	$	275,092	$	(19,987	)	$	255,105