Acquisitions (Details) (USD $) In Thousands, unless otherwise specified			0 Months Ended		0 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Mar. 10, 2014 Mobile Development Company	Mar. 10, 2014 Mobile Development Company	Mar. 26, 2014 Two Bright Lights, Inc	Mar. 26, 2014 Software Development [Member] Two Bright Lights, Inc	Mar. 26, 2014 Trade Names [Member] Two Bright Lights, Inc	Mar. 26, 2014 Media Content [Member] Two Bright Lights, Inc	Mar. 26, 2014 Customer Relationships [Member] Two Bright Lights, Inc	Mar. 26, 2014 Other Intangible Assets [Member] Two Bright Lights, Inc
Business Acquisition [Line Items]
Current assets					$ 10
Property and equipment					24
Intangible assets						157	33	1,371	287	39
Goodwill	42,436	38,500		500	3,436
Deferred revenue and other liabilities					(57)
Total purchase price			$ 500		$ 5,300