Goodwill and Acquired Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of the Changes in the Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the years ended December 31, 2018 and 2017 were as follows (in thousands):

	2018			2017
Beginning balance	$	1,498,688		$	1,228,503
Acquisition of Soasta, Inc.	—			121,668
Acquisition of Nominum, Inc.	—			133,754
Measurement period adjustments	(6,667		)	4,217
Foreign currency translation	(4,617		)	10,546
Ending balance	$	1,487,404		$	1,498,688

Schedule of Acquired Intangible Assets

Acquired intangible assets that are subject to amortization consisted of the following as of December 31, 2018 and 2017 (in thousands):

	December 31, 2018							December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Completed technologies	$	145,091	$	(81,587	)	$	63,504	$	145,091	$	(65,283	)	$	79,808
Customer-related intangible assets	245,710		(144,786		)	100,924		245,310		(128,835		)	116,475
Non-compete agreements	700		(306		)	394		4,710		(3,975		)	735
Trademarks and trade names	7,200		(3,674		)	3,526		7,200		(2,959		)	4,241
Acquired license rights	490		(490		)	—		490		(490		)	—
Total	$	399,191	$	(230,843	)	$	168,348	$	402,801	$	(201,542	)	$	201,259

The following were the identified intangible assets acquired and their respective weighted average useful lives (in thousands, except years):

	Gross Carrying Amount		Weighted Average Useful Life
Completed technologies	$	7,200	2.2
Customer-related intangible assets	24,700		6.5
Trademarks	1,100		3.7
Non-compete agreements	200		1.5
Total	$	33,200

The following were the identified intangible assets acquired and their respective weighted average useful lives (in thousands, except years):

	Gross Carrying Amount		Weighted Average Useful Life
Completed technologies	$	18,800	4.1
Customer-related intangible assets	28,200		4.6
Trademarks	2,400		4.9
Non-compete agreements	500		1.9
Total	$	49,900