Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets

Schedule of changes in goodwill

	Gross
	Carrying		Accumulated		Net
	Amount		Impairment		Amount
	(in thousands)
As of December 31, 2012	$	151,069	$	95,241	$	55,828
Acquisition	35,520		—		35,520
As of December 31, 2013	186,589		95,241		91,348
Acquisition	51,396		—		51,396
Purchase price adjustments	173		—		173
Impairments	—		27,958		(27,958		)
As of December 31, 2014	$	238,158	$	123,199	$	114,959

Schedule of intangible assets

		December 31, 2014						December 31, 2013
	Weighted			Accumulated						Accumulated
	Average Remaining	Gross		Amortization				Gross		Amortization
	Amortization	Carrying		and		Net		Carrying		and		Net
	Period	Amount		Impairment		Amount		Amount		Impairment		Amount
	(in years)	(in thousands)
Technology	9.6	$	222,358	$	106,342	$	116,016	$	182,408	$	97,524	$	84,884
Customer relationships	13.9	69,350		35,549		33,801		35,040		14,721		20,319
Trademarks and tradenames	3.5	3,050		1,096		1,954		1,970		763		1,207
Indefinite-lived trademark	—	2,900		—		2,900		2,900		—		2,900
IPR&D	—	5,070		5,070		—		5,070		—		5,070
Other	1.1	5,485		848		4,637		765		429		336
Total	10.2	$	308,213	$	148,905	$	159,308	$	228,153	$	113,437	$	114,716

Schedule of estimated aggregate amortization expense for intangible assets with definite useful lives

	Amortization
	(in thousands)
2015	$	27,003
2016	20,969
2017	18,100
2018	16,492
2019	15,235
Thereafter	58,609
Total	$	156,408