Share-Based Payments (Schedule Of Unrecognized Compensation Cost And Weighted-Average Remaining Life) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Share-Based Payments Expense	$ 31,389
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Share-Based Payments Expense	2,555
Weighted-Average Remaining Life	2 years 9 months 18 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Share-Based Payments Expense	25,907
Weighted-Average Remaining Life	2 years 10 months 24 days
Content Arrangements [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Share-Based Payments Expense	$ 2,927
Weighted-Average Remaining Life	1 year 7 months 6 days