Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Acquired Intangible Assets

Information regarding our acquired intangible assets was as follows (in thousands):

	June 30, 2018										December 31, 2017
	GrossCarrying Amount		Accumulated Amortization			Other			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Other		Net Carrying Amount
Finite-lived intangible assets:
Developed technology	$	152,431	$	(29,362	)	$	1,488		$	124,557	$	125,889	$	(19,317	)	$	1,847	$	108,419
Trade names		45,275		(43,926	)		210			1,559		45,275		(10,924	)		261		34,612
Favorable contracts and leases, net		112,817		(12,526	)		—			100,291		112,817		(8,639	)		—		104,178
Other		35,559		(9,499	)		913			26,973		34,099		(7,775	)		1,137		27,461
Total finite-lived intangible assets		346,082		(95,313	)		2,611			253,380		318,080		(46,655	)		3,245		274,670
Indefinite-lived intangible assets:
IPR&D		60,290		—			(13,264	)		47,026		86,832		—			—		86,832
Total indefinite-lived intangible    assets		60,290		—			(13,264	)		47,026		86,832		—			—		86,832
Total intangible assets	$	406,372	$	(95,313	)	$	(10,653	)	$	300,406	$	404,912	$	(46,655	)	$	3,245	$	361,502

Total Future Amortization Expense for Intangible Assets

Total future amortization expense for intangible assets was estimated as follows (in thousands):

	June 30, 2018
Six months ending December 31, 2018	$	17,623
2019		34,715
2020		32,807
2021		32,807
2022		32,807
Thereafter		102,621
Total	$	253,380