Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of intangible assets

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

	At December 31, 2015
	Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Weighted average useful life in years
Acquired technology and domain name	$	31,090	$	(13,835	)	$	17,255	9.70
Customer relationships	6,300		(3,252		)	3,048		8.97
Tradenames	4,900		(1,388		)	3,512		15.00
Total	$	42,290	$	(18,475	)	$	23,815	10.20

	At December 31, 2014
	Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Weighted average useful life in years
Acquired technology and domain name	$	31,090	$	(10,788	)	$	20,302	9.70
Customer relationships	6,300		(2,491		)	3,809		8.97
Tradenames	4,900		(1,062		)	3,838		15.00
Total	$	42,290	$	(14,341	)	$	27,949	10.20

Schedule of amortization expense

Amortization expense by asset type for the years ended December 31, 2015, 2014, and 2013 is shown below (in thousands):

	Year Ended December 31,
	2015		2014		2013
Acquired technology and domain name	$	3,047	$	3,164	$	3,318
Customer relationships	760		760		760
Trade names	327		327		327
Total amortization	$	4,134	$	4,251	$	4,405

Schedule of expected amortization expense with respect to intangible assets

Expected amortization expense with respect to intangible assets at December 31, 2015 for each of the five years through December 31, 2020 and thereafter is as follows (in thousands):

Years ended December 31,
2016	$	4,041
2017	3,862
2018	3,861
2019	3,791
2020	3,787
Thereafter	4,473
Total amortization expense	$	23,815