Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Intangible assets
Gross Carrying Value	$ 42,290	$ 42,290
Accumulated amortization	(22,516)	(18,475)
Net Carrying Value	19,774	23,815
Acquired technology and domain name
Intangible assets
Gross Carrying Value	31,090	31,090
Accumulated amortization	(16,876)	(13,835)
Net Carrying Value	14,214	17,255
Customer relationships
Intangible assets
Gross Carrying Value	6,300	6,300
Accumulated amortization	(3,925)	(3,252)
Net Carrying Value	2,375	3,048
Tradenames
Intangible assets
Gross Carrying Value	4,900	4,900
Accumulated amortization	(1,715)	(1,388)
Net Carrying Value	$ 3,185	$ 3,512