Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets

Schedule of changes in goodwill

	Gross carrying		Accumulated
	amount		impairment		Net amount
	(in thousands)
Balance at December 31, 2017	$	430,331	$	123,200	$	307,131
Impairment		—		122,829		(122,829)
Balance at December 31, 2018		430,331		246,029		184,302
Allocated to Assets held for sale		—		2,359		(2,359)
Balance at December 31, 2019	$	430,331	$	248,388	$	181,943

Schedule of intangible assets excluding goodwill

		December 31, 2019						December 31, 2018
	Average			Accumulated						Accumulated
	Remaining	Gross		Amortization				Gross		Amortization
	Amortization	Carrying		and		Net		Carrying		and		Net
	Period	Amount		Impairment		Amount		Amount		Impairment		Amount
	(in years)	(in thousands)
Technology	5.0	$	327,908	$	291,766	$	36,142	$	337,218	$	290,808	$	46,410
Customer relationships	9.2		146,465		126,764		19,701		164,595		136,126		28,469
In-process R&D	—		—		—		—		13,710		10,530		3,180
Trademarks and tradenames	4.4		30,910		25,256		5,654		30,910		23,899		7,011
Other	1.1		3,686		3,665		21		3,686		3,607		79
Total	6.3	$	508,969	$	447,451	$	61,518	$	550,119	$	464,970	$	85,149

Schedule of estimated annual amortization expense, excluding in-process R&D for intangible assets with definite useful lives

	Amortization
	(in thousands)
2020	$	15,333
2021		12,280
2022		10,018
2023		8,347
2024		6,708
Thereafter		8,832
Total	$	61,518