Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Advertising Expense	$ 150,734	$ 154,371	$ 105,068
Foreign Currency Transaction Gain (Loss), Realized	7,322	(231)	(130)
Accounts Receivable, Net, Noncurrent	$ 48,380	$ 41,983
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		527
Stockholders entitled election of Board of Directors	25.00%
Maximum [Member]
Deferred Carriage Fees Contractual Period	13 years
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage	15.00%