Business Acquisition Business Acquisition (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount	$ 36,600,000
Business Combination, Consideration Transferred, Liabilities Incurred	15,700,000	28,800,000
Deferred income taxes	250,000	1,150,000	6,822,000
Goodwill, Acquired During Period	54,472,000	128,532,000
Business Acquisition Contributed Total Revenue	98,100,000
Business Combination, Consideration Transferred	163,450,000
IGN Entertainment, Inc [Member]
Goodwill, Period Increase (Decrease)	2,000,000
Other Acquisitions [Member]
Business Acquisition Contributed Total Revenue		16,900,000
Business Combination, Consideration Transferred		32,900,000
Data Haven Limited Buzz Networks Limited And C Infinity [Member]
Business Combination, Consideration Transferred			3,800,000
Ziff Davis, Inc [Member]
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount		12,900,000
Business Acquisition, Cost of Acquired Entity, Cash Paid		163,100,000
Goodwill, Period Increase (Decrease)	1,700,000
Goodwill, Acquired During Period		112,882,000
Business Acquisition Contributed Total Revenue		9,700,000
Business Acquisition Contributed Net Income		1,600,000
Business Combination, Consideration Transferred		$ 200,436,000