Business Acquisitions Purchase Price Allocation (Details) - USD ($) $ in Thousands	Oct. 01, 2015	Dec. 31, 2015	Dec. 31, 2014	Mar. 26, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Goodwill		$ 47,396	$ 41,871		$ 38,500
GigMasters.com [Member]
Business Acquisition [Line Items]
Current assets	$ 449
Property and equipment	37
Finite-Lived Intangible Assets	3,700
Goodwill	5,525
Deferred revenue and other liabilities	(1,002)
Deferred Taxes, Net	(831)
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination	7,868
Two Bright Lights, Inc.
Business Acquisition [Line Items]
Other long term assets		7
Property and equipment		24
Finite-Lived Intangible Assets				$ 1,700
Goodwill		4,350
Deferred revenue and other liabilities		(68)
Total purchase price		5,300
Capitalized software | GigMasters.com [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets	310
Capitalized software | Two Bright Lights, Inc.
Business Acquisition [Line Items]
Finite-lived intangibles		47
Trade names | GigMasters.com [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets	480
Trade names | Two Bright Lights, Inc.
Business Acquisition [Line Items]
Finite-lived intangibles		36
Media content | Two Bright Lights, Inc.
Business Acquisition [Line Items]
Finite-lived intangibles		325
Customer relationships | Two Bright Lights, Inc.
Business Acquisition [Line Items]
Finite-lived intangibles		$ 573
Vendor Relationship [Member] | GigMasters.com [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets	$ 2,900