Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Goodwill and Intangible Assets
Intangible assets, gross	$ 12,707		$ 12,707		$ 11,222
Less accumulated amortization	(5,774)		(5,774)		(4,146)
Net Carrying Amount	6,933		6,933		7,076
Goodwill	29,201		29,201		29,201
Goodwill and intangible assets, net	36,134		36,134		36,277
Amortization expense	892	$ 503	1,628	$ 1,020
Estimated future amortization
Nine Months Ending December 31, 2015	1,909		1,909
2016	3,081		3,081
2017	1,814		1,814
2018	100		100
2019	29		29
Net Carrying Amount	6,933		6,933		7,076
Developed technology
Goodwill and Intangible Assets
Intangible assets, gross	6,050		6,050		$ 6,050
Net Carrying Amount	3,668		$ 3,668
Weighted Average Remaining Useful Life			2 years 4 months 24 days		2 years 10 months 24 days
Estimated future amortization
Nine Months Ending December 31, 2015	754		$ 754
2016	1,508		1,508
2017	1,406		1,406
Net Carrying Amount	3,668		3,668
Domain names
Goodwill and Intangible Assets
Intangible assets, gross	950		950		$ 950
Net Carrying Amount	501		$ 501
Weighted Average Remaining Useful Life			3 years 2 months 12 days		3 years 7 months 6 days
Estimated future amortization
Nine Months Ending December 31, 2015	92		$ 92
2016	180		180
2017	100		100
2018	100		100
2019	29		29
Net Carrying Amount	501		501
Customer relationships
Goodwill and Intangible Assets
Intangible assets, gross	1,600		1,600		$ 1,600
Net Carrying Amount	589		$ 589
Weighted Average Remaining Useful Life			1 year 2 months 12 days		1 year 7 months 6 days
Estimated future amortization
Nine Months Ending December 31, 2015	274		$ 274
2016	315		315
Net Carrying Amount	589		589
Non-compete agreements
Goodwill and Intangible Assets
Intangible assets, gross	580		580		$ 580
Net Carrying Amount	369		$ 369
Weighted Average Remaining Useful Life			2 years 6 months		3 years
Estimated future amortization
Nine Months Ending December 31, 2015	75		$ 75
2016	150		150
2017	144		144
Net Carrying Amount	369		369
Capitalized software development costs
Goodwill and Intangible Assets
Intangible assets, gross	3,527		3,527		$ 2,042
Net Carrying Amount	1,806		$ 1,806
Weighted Average Remaining Useful Life			1 year 4 months 24 days		1 year 2 months 12 days
Estimated future amortization
Nine Months Ending December 31, 2015	714		$ 714
2016	928		928
2017	164		164
Net Carrying Amount	$ 1,806		$ 1,806