Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

The following table summarizes the changes in the Company’s goodwill balances from December 31, 2016 to March 31, 2017 for the Company’s two reporting units:



	Web Presence Unit		Email Marketing Unit		Total
	Amount		Amount		Amount
	(in thousands)		(in thousands)		(in thousands)
Goodwill balance at December 31, 2016	$	1,255,604	$	604,305	$	1,859,909
Goodwill related to 2016 acquisitions	—		—		—
Foreign translation impact	382		—		382
Goodwill balance at March 31, 2017	$	1,255,986	$	604,305	$	1,860,291

Summary of Other Intangible Assets

At December 31, 2016, other intangible assets consisted of the following:



	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Useful Life
	(dollars in thousands)
Developed technology	$	284,005	$	111,348	$	172,657	7 years
Subscriber relationships	659,662		345,070		314,592		7 years
Trade-names	133,805		57,789		76,016		8 years
Intellectual property	34,084		10,270		23,814		13 years
Domain names available for sale	29,954		4,976		24,978		Indefinite
Leasehold interests	314		314		—		1 year
Total December 31, 2016	$	1,141,824	$	529,767	$	612,057

During the three months ended March 31, 2016, the Company wrote-off acquired in-process research and development of $1.4 million related to its acquisition of Webzai in 2014, as the Company had abandoned certain research and development projects in favor of other projects. There were no impairment charges of intangible assets during the three months ended March 31, 2017.

At March 31, 2017, other intangible assets consisted of the following:



	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Useful Life
	(dollars in thousands)
Developed technology	$	284,043	$	119,810	$	164,233	7 years
Subscriber relationships	659,762		366,163		293,599		7 years
Trade-names	133,806		61,280		72,526		8 years
Intellectual property	34,120		11,145		22,975		13 years
Domain names available for sale	30,121		5,431		24,690		Indefinite
Leasehold interests	314		314		—		1 year
Total March 31, 2017	$	1,142,166	$	564,143	$	578,023