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Stock-Based Compensation (Details 2) (USD $) In Thousands	3 Months Ended		6 Months Ended
Stock-Based Compensation (Details 2) (USD $) In Thousands	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Stock-Based Compensation
Allocated share-based compensation expense	$ 3,718	$ 2,894	$ 18,895	$ 9,210
Subscriber-related
Stock-Based Compensation
Allocated share-based compensation expense	340	234	1,317	683
General and administrative
Stock-Based Compensation
Allocated share-based compensation expense	$ 3,378	$ 2,660	$ 17,578	$ 8,527

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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