Business Acquisitions (Details) - USD ($) $ in Thousands	Sep. 07, 2016	Oct. 01, 2015	Mar. 26, 2014	Mar. 10, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill					$ 48,678	$ 47,396	$ 41,871
How He Asked
Business Acquisition [Line Items]
Consideration transferred	$ 1,500
Cash paid for acquisitions and investments	1,400
Consideration, amount of holdback	$ 100
Consideration holdback period	12 months
Goodwill	$ 1,282
Total purchase price	1,471
GigMasters.com
Business Acquisition [Line Items]
Cash paid for acquisitions and investments		$ 6,100
Finite-Lived intangible assets		3,700
Goodwill		$ 5,525
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage		28.70%
Business Combination, Percent Acquired		71.30%
Total purchase price		$ 7,868
Equity interest in acquiree, remeasurement gain		800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Tangible Assets		500
Two Bright Lights, Inc.
Business Acquisition [Line Items]
Consideration transferred			$ 5,300
Finite-Lived intangible assets			1,700
Goodwill					$ 4,350
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets			$ 100
Gojee, Inc.
Business Acquisition [Line Items]
Consideration transferred				$ 500
Trade names | How He Asked
Business Acquisition [Line Items]
Finite-Lived intangible assets	$ 189
Trade names | GigMasters.com
Business Acquisition [Line Items]
Finite-Lived intangible assets		$ 480