Intangible Assets and Liabilities (Tables)

6 Months Ended

Jun. 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:

	June 30, 2018									December 31, 2017
	Gross			Accumulated (Amortization) Accretion			Net			Gross		Accumulated (Amortization) Accretion			Net
	(in thousands)
Intangible Assets
Core-developed technology	$	509,896		$	(413,007	)	$	96,889		$	429,548	$	(399,969	)	$	29,579
Customer contracts and relationships	384,041			(203,890		)	180,151			258,586		(197,582		)	61,004
Trademarks and trade names	79,569			(67,709		)	11,860			70,056		(66,004		)	4,052
Other	12,601			(11,123		)	1,478			11,661		(11,068		)	593
Total intangible assets subject to amortization	$	986,107		$	(695,729	)	$	290,378		$	769,851	$	(674,623	)	$	95,228
In-process research and development	6,400			—			6,400			—		—			—
Total intangible assets	$	992,507		$	(695,729	)	$	296,778		$	769,851	$	(674,623	)	$	95,228
Intangible Liabilities
Customer contracts and relationships	$	(23,900	)	$	2,609		$	(21,291	)	$	—	$	—		$	—

Summary of Intangible Asset Account Activity

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

	Six Months Ended June 30,
	2018			2017
	(in thousands)
Beginning balance, intangible assets, gross	$	769,851		$	669,896
Intangible assets acquired	241,539			36,500
Effect of change in exchange rates	(18,883		)	40,818
Ending balance, intangible assets, gross	$	992,507		$	747,214
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 June 30, 2018)	$	38,786	$	(2,609	)	$	36,177
2019	72,012		(8,233		)	63,779
2020	52,076		(8,028		)	44,048
2021	36,469		(1,963		)	34,506
2022	26,282		(458		)	25,824
Beyond 2022	64,753		—			64,753
Total intangible assets subject to amortization (accretion)	$	290,378	$	(21,291	)	$	269,087