Intangible Assets

3 Months Ended

Mar. 31, 2015

Intangible Assets

Intangible Assets

5.Intangible Assets

Intangible assets consisted of the following at March 31, 2015 and December 31, 2014 (in thousands):

	At March 31, 2015
	Gross Carrying		Accumulated		Net Carrying
	Value		Amortization		Value
Acquired technology and domain name	$	31,090	$	(11,551)	$	19,539
Customer relationships		6,300		(2,682)		3,618
Tradenames		4,900		(1,143)		3,757
Total	$	42,290	$	(15,376)	$	26,914

	At December 31, 2014
	Gross Carrying		Accumulated		Net Carrying
	Value		Amortization		Value
Acquired technology and domain name	$	31,090	$	(10,788)	$	20,302
Customer relationships		6,300		(2,491)		3,809
Tradenames		4,900		(1,062)		3,838
Total	$	42,290	$	(14,341)	$	27,949

Amortization expense for the three months ended March 31, 2015 and 2014 was $1.0 million and $1.1 million, respectively. 

Amortization expense with respect to intangible assets at March 31, 2015 for each of the five years through December 31, 2019 and thereafter is as follows (in thousands):

Nine months ending December 31, 2015	$	3,099
2016		4,041
2017		3,862
2018		3,861
2019		3,792
Thereafter		8,259
Total amortization expense	$	26,914