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Stock-Based Compensation (Details 2) (USD $)	3 Months Ended		6 Months Ended
Stock-Based Compensation (Details 2) (USD $)	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Stock-Based Compensation
Non-cash, stock-based compensation	$ 6,757,000	$ 3,718,000	$ 28,844,000	$ 18,860,000
Non-Performance Based Stock Awards
Stock-Based Compensation
Unrecognized compensation expense	25,000,000		25,000,000
Future forfeiture rate (as a percent)	3.80%		3.80%
Weighted-average period (in years)	2
2012 Stock Option Adjustment
Stock-Based Compensation
Non-cash, stock-based compensation			13,000,000
Subscriber-related
Stock-Based Compensation
Non-cash, stock-based compensation	357,000	340,000	1,194,000	1,317,000
General and administrative
Stock-Based Compensation
Non-cash, stock-based compensation	$ 6,400,000	$ 3,378,000	$ 27,650,000	$ 17,543,000

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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