Property and Equipment - Schedule of Depreciation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Property Plant And Equipment [Line Items]
Depreciation	$ 1,743	$ 2,434	$ 4,442	$ 5,273
Service Costs
Property Plant And Equipment [Line Items]
Depreciation	864	1,125	2,328	2,622
Sales and Marketing
Property Plant And Equipment [Line Items]
Depreciation	13	17	26	37
Product Development
Property Plant And Equipment [Line Items]
Depreciation	33	50	74	107
General and Administrative
Property Plant And Equipment [Line Items]
Depreciation	$ 833	$ 1,242	$ 2,014	$ 2,507