Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Business Acquisition [Line Items]
Reduction in product cost, reported in direct operating expenses, resulting from change in accounting estimate	$ (386,059)	[1]	$ (363,950)	[1]	$ (810,704)	[1]	$ (768,845)	[1]
Content library, period of amortization					1 year
Change in Accounting Method Accounted for as Change in Estimate [Member]
Business Acquisition [Line Items]
Reduction in product cost, reported in direct operating expenses, resulting from change in accounting estimate			$ 21,700

[1] “Direct operating” excludes depreciation and other of $32.2 million and $64.5 million for the three and six months ended June 30, 2014, respectively